{ "data": { "a": { "slug": "breakcold", "name": "Breakcold", "vendor": "Logike SAS", "vendorUrl": "https://www.breakcold.com", "kind": "http-api", "category": "crm", "summary": "Breakcold is a CRM for small sales teams that syncs email, LinkedIn, WhatsApp and Telegram conversations into one pipeline. Agents reach its records, tasks, notes and inbox through a REST API and a hosted MCP server.", "url": "https://www.anchorterminal.com/tools/breakcold", "markdownUrl": "https://www.anchorterminal.com/tools/breakcold.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/breakcold.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/breakcold.json", "dns": "breakcold.grade.anchorterminal.com", "transports": [ "streamable-http" ], "remoteUrl": "https://mcp.breakcold.com/mcp/v1", "packages": [], "auth": "mixed", "authNotes": "API keys (`bc_live_` prefix) are created in Settings \u003e API keys with chosen scopes (records, tasks, notes, inbox, inbox send, CRM metadata and others, read and write separate), an optional workspace limit and an expiry, shown once and revocable, with activity history. MCP clients can instead sign in by OAuth with PKCE through WorkOS AuthKit and dynamic client registration. Multi-organisation users send `X-Breakcold-Organization-Id`.", "pricing": "paid", "pricingNotes": "One plan in three sizes: X1 $99 a month (1 seat), X5 $199 (5 seats) and X20 $499 (20 seats), each with MCP access, 10% off quarterly and 20% off yearly. Extra seats $10 a month. A 14-day trial needs a card. API and MCP calls draw on a weekly AI usage allowance at 0.2 tokens a read and 0.4 a write; a weekly reset costs $50.", "priceSummary": "$99 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the OpenAPI spec, auth.md, the docs or the pricing page (checked 2026-11-06). Calls draw on a plan's weekly usage allowance.", "endpoints": [] }, "toolCount": 72, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-11-06" }, "docsUrl": "https://docs.breakcold.com/api/overview", "llmsTxt": "https://docs.breakcold.com/llms.txt", "openapi": "https://docs.breakcold.com/api/openapi.json", "capabilities": [ "crm.records", "crm.pipeline", "crm.activities", "crm.search", "crm.webhooks", "email.send", "email.threads" ], "tags": [ "official", "hosted", "mcp", "remote-mcp", "oauth", "openapi", "llms-txt", "paid", "trial", "webhooks", "idempotency", "eu" ], "lastRelease": "2026-11-06", "graded": true, "anchor": { "graded": true, "score": 58, "grade": "C", "agentReady": false, "rank": 766, "ranked": true, "rankOf": 1486, "categoryRank": 9, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 67, "maintenance": 60, "payments": 15, "reliability": 45, "schema": 90, "security": 60, "transparency": 67 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-06" }, "negative": 0, "verdict": "Breakcold's API and hosted MCP server are built for agents, with an OpenAPI contract, scoped and expiring keys, published rate limits, idempotency keys and message sends that stay drafts until confirmed. No status page, SLA or security certification was found, and the only trial needs a card on a plan from $99 a month.", "bestFor": "Small sales teams who run outreach on email and social channels and want an agent to keep records, tasks and replies in order.", "strengths": [ "API keys take scopes, a workspace limit and an expiry, and MCP also accepts OAuth with PKCE", "Compose and send tools draft by default and send only with an explicit `sendMode`", "OpenAPI 3.1 contract of 70 described operations, llms.txt and Markdown docs", "Rate limits published per organisation, workspace, identity and route, with Retry-After and `retryAfterMs`", "Public DPA with a provider inventory and 30 days' notice of new subprocessors" ], "weaknesses": [ "No status page or SLA was found; status.breakcold.com did not answer", "72 MCP tools by default, and their annotations are not published", "The only trial needs a card, and plans start at $99 a month", "No security.txt, bug bounty or security certification found", "No official SDK, and the CRM MCP server is not in the official MCP registry" ], "agentNotes": [ "Call `capabilities_list` or `tools_search` first to see which tools the granted scopes allow", "Send an Idempotency-Key on REST creates and a stable idempotency key on `records_create`, so retries return the original result", "Leave `sendMode` unset on compose and send tools until the user has confirmed the message", "Pass `fields` on record lists to cut the response to the fields you need", "On 429 wait for Retry-After or `retryAfterMs`; over MCP the error code is -32029" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 58 } ], "editorialScores": { "ergonomics": 67, "maintenance": 60, "payments": 15, "reliability": 45, "schema": 90, "security": 60, "transparency": 69 }, "provenanceScore": 64, "checked": { "categories": { "ergonomics": "2026-11-06", "maintenance": "2026-11-06", "payments": "2026-11-06", "reliability": "2026-11-06", "schema": "2026-11-06", "security": "2026-11-06", "transparency": "2026-11-06" }, "last": "2026-11-06", "oldest": "2026-11-06", "stale": false, "staleAfterDays": 90 } }, "connect": { "http": "curl \"https://rest.breakcold.com/api/v1/workspaces\" -H \"Authorization: Bearer YOUR_API_KEY\"", "claudeCode": "claude mcp add --transport http breakcold https://mcp.breakcold.com/mcp/v1", "config": { "mcpServers": { "breakcold": { "url": "https://mcp.breakcold.com/mcp/v1" } } } }, "letme": { "capability": "https://letme.dev/crm.records", "tool": "https://letme.dev/breakcold" }, "area": "business", "unitPrices": [ { "item": "X1 plan (1 seat)", "unit": "month", "usd": 99, "note": "Billed monthly; 10% off quarterly, 20% off yearly" }, { "item": "X5 plan (5 seats)", "unit": "month", "usd": 199, "note": "AI usage five times X1" }, { "item": "X20 plan (20 seats)", "unit": "month", "usd": 499, "note": "AI usage twenty times X1" }, { "item": "Extra seat or connected account", "unit": "seat-month", "usd": 10, "note": "On every plan" } ], "provenance": { "legalEntity": "Logike SAS", "domain": "breakcold.com", "domainRegistered": "", "endpointOnVendorDomain": true, "terms": "https://www.breakcold.com/legal/terms-and-conditions", "privacy": "https://www.breakcold.com/legal/privacy", "statusPage": "", "changelog": "https://docs.breakcold.com/api/changelog", "securityTxt": "none", "checked": "2026-11-06", "notes": [ "The terms and conditions (19 October 2026) name Logike SAS, SIREN 902303395, RCS Paris, share capital EUR 1,000, 128 rue de la Boétie, 75008 Paris, under French law. A services agreement, developer terms (3 September 2026), DPA (27 October 2026) and vulnerability disclosure policy (3 September 2026) sit in the legal centre.", "The developer terms ask integrations to respect published rate limits and not rotate keys to evade them; no clause against reading public pages was found.", "www.breakcold.com/robots.txt allows all but /admin and /api with Content-Signal ai-train=no, search=yes, ai-input=yes; docs.breakcold.com allows all; rest.breakcold.com and mcp.breakcold.com carry only content-signal comments. One unauthenticated GET to rest.breakcold.com/api/v1/openapi.json, sent before its robots.txt was read, answered 401.", "/.well-known/security.txt returns 404. status.breakcold.com failed the TLS handshake. Domain registration date not checked.", "WebFetch received 404 for the pricing and legal pages, which answered 200 to a plain request, so those were read with curl." ], "score": 64 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/breakcold.json", "live": { "slug": "breakcold", "probe": { "target": "https://mcp.breakcold.com/mcp/v1", "method": "get", "lastAt": "2026-11-07T18:20:14.868914805Z", "lastOk": true, "lastStatus": 401, "lastMs": 133, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 62, "p95ms24h": 146, "samples24h": 200, "samples30d": 200, "days": [ { "date": "2026-11-06", "probes": 13, "ok": 13 }, { "date": "2026-11-07", "probes": 187, "ok": 187 } ] }, "securityTxt": { "url": "https://breakcold.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T16:00:18.103639801Z" }, "llmsTxt": { "url": "https://docs.breakcold.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:31:44.782472776Z" }, "pages": [ { "url": "https://docs.breakcold.com/api/changelog", "kind": "changelog", "status": 200, "checkedAt": "2026-11-07T14:05:21.53355824Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "f02d2d2285f0" }, { "url": "https://www.breakcold.com/legal/privacy", "kind": "privacy", "status": 404, "checkedAt": "2026-11-07T14:26:05.166026349Z", "changedAt": "0001-01-01T00:00:00Z" }, { "url": "https://www.breakcold.com/legal/terms-and-conditions", "kind": "terms", "status": 404, "checkedAt": "2026-11-07T14:26:07.751718301Z", "changedAt": "0001-01-01T00:00:00Z" } ], "mcpTools": { "url": "https://mcp.breakcold.com/mcp/v1", "checkedAt": "2026-11-07T01:42:53.267576496Z", "status": "auth", "note": "asks for credentials before listing its tools", "changedAt": "2026-11-07T01:42:53.267576496Z" }, "updatedAt": "2026-11-07T18:20:14.868914805Z" } }, "answer": "Breakcold scores 58 (C) on agent readiness against Close API + MCP's 56.2 (C), and leads in 3 of 7 scored categories. Close API + MCP leads on reliability, security \u0026 auth and payments \u0026 pricing.", "b": { "slug": "close", "name": "Close API + MCP", "vendor": "Close", "vendorUrl": "https://www.close.com", "kind": "http-api", "category": "crm", "summary": "REST API and hosted MCP server for Close, a sales CRM built around calling, email and SMS.", "url": "https://www.anchorterminal.com/tools/close", "markdownUrl": "https://www.anchorterminal.com/tools/close.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/close.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/close.json", "dns": "close.grade.anchorterminal.com", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://api.close.com/api/v1", "packages": [ { "registry": "pypi", "name": "closeio" } ], "auth": "mixed", "authNotes": "API keys over HTTP Basic (key as username, empty password), scoped to one user and organisation; OAuth 2.0 for apps. The hosted MCP server at https://mcp.close.com/mcp takes OAuth with dynamic client registration, or the headers Close-API-Key plus Close-Scope set to mcp.read, mcp.write_safe or mcp.write_destructive.", "pricing": "paid", "pricingNotes": "No free plan, a 14-day trial with no card. Solo $9 a seat a month billed yearly or $19 monthly, Essentials $35 or $49, Growth $99 or $109, Scale $139 or $149. API access is on every plan. Calls around $0.02 a minute and SMS at cost on top (https://www.close.com/pricing).", "priceSummary": "$9 / seat-mo", "where": "hosted", "x402": { "level": "no", "evidence": "No payments. Access follows the Close subscription.", "endpoints": [] }, "toolCount": 141, "popularity": { "githubStars": 70, "npmWeekly": null, "pypiWeekly": 13891, "asOf": "2026-09-30" }, "docsUrl": "https://developer.close.com", "llmsTxt": "https://developer.close.com/llms.txt", "openapi": "https://api.close.com/api/openapi.json", "registryName": "com.close/close-mcp", "capabilities": [ "crm.records", "crm.pipeline", "crm.activities", "crm.search", "crm.webhooks", "crm.email" ], "tags": [ "hosted", "mcp", "llms-txt", "openapi", "webhooks", "closed-source", "no-card", "python", "read-only-mode" ], "lastRelease": "2026-09-10", "graded": true, "anchor": { "graded": true, "score": 56.2, "grade": "C", "agentReady": false, "rank": 836, "ranked": true, "rankOf": 1486, "categoryRank": 11, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 56, "maintenance": 49, "payments": 30, "reliability": 56, "schema": 82, "security": 66, "transparency": 68 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-01" }, "negative": -3, "negativeNotes": [ "-3. A published behaviour changed for existing clients, announced the day it took effect. The 16 July 2026 changelog entry says creating a membership through the API \"now requires\" the organisation to have domain restriction enabled and the new member's email on a verified domain, with no earlier notice found. https://developer.close.com/api/overview/changelog/2026/7/16" ], "verdict": "Three MCP scopes chosen per connection limit an agent to 80 read tools or 99 with creates, and email tools only save drafts. The full set is 141 tools. The API was down across regions for about 2.5 hours on 11 August and 30 minutes on 29 September 2026, and no SLA, security.txt or bug bounty was found.", "bestFor": "Inside-sales teams that call, email and text from the CRM and want an agent to log, triage and draft without being able to send or delete by default.", "strengths": [ "Three MCP scopes chosen per connection, read (80 tools), safe write (99) and destructive (141)", "Email tools create drafts only, never send", "Delete tools tell the model the action cannot be undone and to act only on an explicit instruction", "`RateLimit` header on every response and `retry-after` on every 429", "Event log API on every plan, and SOC 2 Type 2" ], "weaknesses": [ "141 MCP tools, and even the read scope loads 80", "Two outages reached the API in the 90 days to 1 November 2026, on 11 August and 29 September", "OAuth for REST apps has a single full-access scope", "No public subprocessor list, no security.txt and no bug bounty found", "One dated API changelog entry since 3 August 2026, and no free plan, only a 14-day trial" ], "agentNotes": [ "Connect with `Close-Scope: mcp.read` unless the job needs writes, and `mcp.write_safe` if it only creates", "Sleep for the `reset` value in the `RateLimit` header after a 429, which the docs say beats `retry-after`", "Use cursors through advanced filtering or the event log for large pulls, since `_skip` has a per-resource ceiling", "Search the lead before `create_lead`, because there's no idempotency key and a retry makes a duplicate", "Expect `create_draft_email` to leave a draft, and tell the user to send it from Close" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 56.2 } ], "editorialScores": { "ergonomics": 56, "maintenance": 49, "payments": 30, "reliability": 56, "schema": 82, "security": 66, "transparency": 47 }, "provenanceScore": 89, "checked": { "categories": { "ergonomics": "2026-11-01", "maintenance": "2026-11-01", "payments": "2026-11-01", "reliability": "2026-11-01", "schema": "2026-11-01", "security": "2026-11-01", "transparency": "2026-11-01" }, "last": "2026-11-01", "lastMoved": "2026-11-01", "oldest": "2026-11-01", "stale": false, "staleAfterDays": 90 } }, "connect": { "http": "curl https://api.close.com/api/v1/me/ -u \"$CLOSE_API_KEY:\"", "claudeCode": "claude mcp add --transport http close https://mcp.close.com/mcp --header \"Close-API-Key: $CLOSE_API_KEY\" --header \"Close-Scope: mcp.read\"", "config": { "mcpServers": { "close": { "url": "https://mcp.close.com/mcp" } } } }, "letme": { "capability": "https://letme.dev/crm.records", "tool": "https://letme.dev/close" }, "area": "business", "unitPrices": [ { "item": "Solo", "unit": "seat-month", "usd": 9, "note": "billed yearly, $19 monthly; API on every plan" }, { "item": "Essentials", "unit": "seat-month", "usd": 35, "note": "billed yearly, $49 monthly" }, { "item": "Growth", "unit": "seat-month", "usd": 99, "note": "billed yearly, $109 monthly" }, { "item": "Scale", "unit": "seat-month", "usd": 139, "note": "billed yearly, $149 monthly" }, { "item": "Outbound calls", "unit": "call-minute", "usd": 0.02, "note": "approximate, most destinations" } ], "provenance": { "legalEntity": "Elastic Inc", "domain": "close.com", "domainRegistered": "1996-02-20", "domainNote": "close.com was registered in 1996, long before the Close product took the name.", "endpointOnVendorDomain": true, "terms": "https://close.com/tos", "privacy": "https://close.com/privacy", "statusPage": "https://status.close.com", "changelog": "https://developer.close.com/api/overview/changelog", "securityTxt": "none", "checked": "2026-11-01", "score": 89 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/close.json", "live": { "slug": "close", "probe": { "target": "https://api.close.com/api/v1", "method": "get", "lastAt": "2026-11-07T18:20:17.612451198Z", "lastOk": true, "lastStatus": 404, "lastMs": 548, "authRequired": false, "uptime24h": 100, "uptime30d": 99.99, "p50ms24h": 458, "p95ms24h": 571, "samples24h": 239, "samples30d": 7910, "days": [ { "date": "2026-10-07", "probes": 272, "ok": 272 }, { "date": "2026-10-08", "probes": 268, "ok": 268 }, { "date": "2026-10-09", "probes": 250, "ok": 250 }, { "date": "2026-10-10", "probes": 247, "ok": 247 }, { "date": "2026-10-11", "probes": 247, "ok": 247 }, { "date": "2026-10-12", "probes": 247, "ok": 247 }, { "date": "2026-10-13", "probes": 248, "ok": 248 }, { "date": "2026-10-14", "probes": 249, "ok": 249 }, { "date": "2026-10-15", "probes": 253, "ok": 253 }, { "date": "2026-10-16", "probes": 252, "ok": 251 }, { "date": "2026-10-17", "probes": 253, "ok": 253 }, { "date": "2026-10-18", "probes": 256, "ok": 256 }, { "date": "2026-10-19", "probes": 255, "ok": 255 }, { "date": "2026-10-20", "probes": 252, "ok": 252 }, { "date": "2026-10-21", "probes": 253, "ok": 253 }, { "date": "2026-10-22", "probes": 253, "ok": 253 }, { "date": "2026-10-23", "probes": 248, "ok": 248 }, { "date": "2026-10-24", "probes": 251, "ok": 251 }, { "date": "2026-10-25", "probes": 250, "ok": 250 }, { "date": "2026-10-26", "probes": 252, "ok": 252 }, { "date": "2026-10-27", "probes": 249, "ok": 249 }, { "date": "2026-10-28", "probes": 251, "ok": 251 }, { "date": "2026-10-29", "probes": 249, "ok": 249 }, { "date": "2026-10-30", "probes": 248, "ok": 248 }, { "date": "2026-10-31", "probes": 251, "ok": 251 }, { "date": "2026-11-01", "probes": 249, "ok": 249 }, { "date": "2026-11-02", "probes": 250, "ok": 250 }, { "date": "2026-11-03", "probes": 248, "ok": 248 }, { "date": "2026-11-04", "probes": 246, "ok": 246 }, { "date": "2026-11-05", "probes": 185, "ok": 185 }, { "date": "2026-11-06", "probes": 241, "ok": 241 }, { "date": "2026-11-07", "probes": 187, "ok": 187 } ] }, "vendorStatus": { "page": "https://status.close.com", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-11-07T18:20:41.690211173Z" }, "versions": [ { "registry": "mcp-registry", "name": "com.close/close-mcp", "version": "1.0.1", "seenAt": "2026-11-07T18:16:28.95801333Z" }, { "registry": "pypi", "name": "closeio", "version": "2.1", "released": "2023-07-25", "seenAt": "2026-11-06T23:15:27.08852058Z" } ], "pypiWeekly": 10280, "securityTxt": { "url": "https://close.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T16:00:24.484554452Z" }, "llmsTxt": { "url": "https://developer.close.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:31:51.196167239Z" }, "domain": { "domain": "close.com", "registered": "1996-02-20", "source": "https://rdap.verisign.com/com/v1/domain/close.com", "checkedAt": "2026-11-01T14:26:54.039936881Z" }, "pages": [ { "url": "https://developer.close.com/api/overview/changelog", "kind": "changelog", "status": 200, "checkedAt": "2026-11-07T14:03:01.683922952Z", "changedAt": "2026-11-06T13:25:36.871748809Z", "fingerprint": "72607f52a907" }, { "url": "https://www.close.com/pricing", "kind": "pricing", "status": 200, "checkedAt": "2026-11-07T14:26:53.021075164Z", "changedAt": "2026-10-31T06:26:01.324876182Z", "fingerprint": "29d00f263281" }, { "url": "https://close.com/privacy", "kind": "privacy", "status": 200, "checkedAt": "2026-11-07T14:01:09.162421361Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "af850e65f4fd" }, { "url": "https://close.com/tos", "kind": "terms", "status": 200, "checkedAt": "2026-11-07T14:01:11.46444464Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "8f7850d129a1" } ], "mcpTools": { "url": "https://mcp.close.com/mcp", "checkedAt": "2026-11-07T01:43:15.089972228Z", "status": "auth", "note": "asks for credentials before listing its tools", "changedAt": "2026-11-07T01:43:15.089972228Z" }, "updatedAt": "2026-11-07T18:20:17.612451198Z" } }, "edges": [ { "by": 15, "category": "payments", "leads": "close", "name": "Payments \u0026 pricing", "reasons": { "a": "No x402, MPP or L402 (0). Plan prices are public, and each call's cost in usage tokens is published, but the money value of a token is not (10). The 14-day trial needs a card (0). auth.md documents an agent identity endpoint that takes an identity assertion or an anonymous request followed by a claim by a person, which we read and did not call; access still needs a paid or card-backed trial account (5 of 20). 0 + 10 + 0 + 5 = 15.", "b": "No x402, MPP or L402 (0). Plan prices public, Solo $9 a seat a month yearly or $19 monthly up to Scale $139 or $149, with calls at about $0.02 a minute passed through at cost, but nothing per API call (10). 14-day trial with no card, prices re-read on 1 November (20). A person signs up in a browser (0). 0 + 10 + 20 + 0 = 30." }, "scores": { "a": 15, "b": 30 } }, { "by": 11, "category": "reliability", "leads": "close", "name": "Reliability", "reasons": { "a": "Graded as a hosted service on the REST API and hosted MCP server. No status page is linked from the site or docs, and status.breakcold.com failed the TLS handshake (0). With no readable history the incident line scores 5. Rate limits published per organisation (600 a minute), workspace (300), identity or key (180) and route (120), for REST and MCP (15). 429 carries Retry-After and `retryAfterMs`, the docs give backoff guidance, and creates take an Idempotency-Key so retries return the original result (15). No SLA found in the services agreement summary, the pricing page or the docs (0). Neither surface is marked beta (10). 0 + 5 + 15 + 15 + 0 + 10 = 45.", "b": "Statuspage at status.close.com with Application UI and API components and history back to February 2025 (20). In the 90 days from 3 August, read from history.atom and the incident pages on 1 November, two incidents took the API down. On 11 August Close was intermittently unavailable for about 2.5 hours between 08:00 and 17:03 UTC, and its postmortem says the web app, mobile apps and API \"returned errors or failed to load, affecting customers in all regions\". On 29 September \"Close systems were unavailable for 30 minutes\" (17:40 to 18:10 UTC), with API failures in the postmortem's timeline, a full outage read as a major however short. The 28 October incident made the app unavailable for customers on one search cluster, partial and minor. Two majors (5). The 1 October check found nothing after 3 July. Limits are set per endpoint group, per key and per organisation (3 times the key limit), but the docs only give 20 a second as an example rather than a table (10 of 15). Every response carries a `RateLimit` header, and every 429 has both `RateLimit` and `retry-after`, with guidance to sleep for the reset value. No idempotency keys or safe-retry guidance for writes (11 of 15). No SLA found on the pricing page (0). REST and MCP carry no beta label (10). 20 + 5 + 10 + 11 + 0 + 10 = 56." }, "scores": { "a": 45, "b": 56 } }, { "by": 11, "category": "ergonomics", "leads": "breakcold", "name": "Agent ergonomics", "reasons": { "a": "72 MCP tools (5), with `tools_search` and `capabilities_list` to find tools by capability or granted scope, and scopes that limit which tools apply (8 back). Cursor pagination, record search and a `fields` selection on record lists since 3 November (18 of 20). Errors carry a code, message, `requestId` and `retryAfterMs`, and the 4 November changelog removed stack frames from messages (17 of 20). Idempotency keys on creates, and compose and send tools return a non-sending draft by default; MCP annotations are not published (14 of 20). No official SDK; setup is one URL with OAuth (5 of 15). 13 + 18 + 17 + 14 + 5 = 67.", "b": "141 MCP tools on 1 November, 80 read, 19 safe-write and 42 destructive (5). Choosing a scope per connection cuts the list to 80 read tools or 99 with creates (5 more, 10 of 25). Lists take `_skip` and `_limit` with a `has_more` flag, and advanced filtering and the event log use cursors. No field selection found (16 of 20). Documented response codes, and 429s say how long to wait (13 of 20). No idempotency keys. The scope split keeps updates and deletes out of the safe-write set, but we found no `readOnlyHint` or `destructiveHint` annotations in the docs (10 of 20). The only official client is the Python `closeio` wrapper, last tagged v2.1 in July 2023 (7 of 15). 10 + 16 + 13 + 10 + 7 = 56." }, "scores": { "a": 67, "b": 56 } }, { "by": 11, "category": "maintenance", "leads": "breakcold", "name": "Maintenance \u0026 community", "reasons": { "a": "API changelog entry on 6 November 2026 (30). More than 60 dated entries since 8 August 2026 (20). Closed service with a public API changelog, an RSS feed, a help centre and support by email; no public issue tracker (10 of 15). The CRM MCP server is not in the official MCP registry (the registry's io.github.breakcold/inboxmcp is a separate product at inbox-mcp.com), and no official SDK exists (0). No package to check (0). 30 + 20 + 10 + 0 + 0 = 60.", "b": "Newest changelog entry on 10 September 2026, 52 days before 1 November (20). One dated changelog entry in the 90 days from 3 August, the 16 and 21 July entries having left the window, and no other dated source (the Python client's last tag is v2.1 from July 2023 and the MCP registry entry is 1.0.1 from 22 September 2025), so fewer than three (0). Public changelog and support by email and phone. We didn't test support (10 of 15). In the official MCP registry as com.close/close-mcp, last version 1.0.1 published on 22 September 2025 (15). The Python client's CI was updated on 10 June 2026 (4 of 10). 20 + 0 + 10 + 15 + 4 = 49." }, "scores": { "a": 60, "b": 49 } }, { "by": 8, "category": "schema", "leads": "breakcold", "name": "Schema \u0026 documentation", "reasons": { "a": "OpenAPI 3.1 contract at docs.breakcold.com/api/openapi.json with 70 operations, each with a description (25). llms.txt and a Markdown copy of each page, plus auth.md and an MCP server card (10). Tool descriptions say how to use them, such as `records_create` asking for every required field and a stable idempotency key and the send tools saying to send only after the user confirms (17 of 20). 84 enums and 488 required lists, with typed attribute pages for each field type (13 of 15). Every operation documents 400 to 429 responses and the error body is shown, but the spec carries only two examples (10 of 15). /api/v1, and an API changelog with dated entries and migration steps (15). 25 + 10 + 17 + 13 + 10 + 15 = 90.", "b": "OpenAPI 3.1 spec, 303 operations on 160 paths at developer.close.com/openapi.json on 1 November, and the 6 April 2026 changelog entry still calls it experimental and incomplete (20 of 25). llms.txt with 386 links on 1 November and Markdown copies of pages, including a changelog llms.txt (10). MCP tool descriptions say when not to call them. Delete tools read 'This action cannot be undone. ONLY call this if the user specifically instructed you to delete', and the email tool says it saves an unsent draft (16 of 20). Typed parameters in the reference, with free-form smart-view queries for search (11 of 15). Examples throughout and an HTTP response codes page (12 of 15). Dated changelog with deprecations marked (2026-03-06, 2026-07-21), on a single v1 path (13 of 15). 20 + 10 + 16 + 11 + 12 + 13 = 82." }, "scores": { "a": 90, "b": 82 } }, { "by": 6, "category": "security", "leads": "close", "name": "Security \u0026 auth", "reasons": { "a": "API keys take chosen read and write scopes, an optional workspace limit and an expiry, are shown once, show activity history and can be revoked. MCP also accepts OAuth with PKCE through WorkOS AuthKit. Tokens travel in headers (30). Read-only keys are possible and message sends stay drafts until `sendMode` is set after the user confirms (17 of 20). The inbox returns email, LinkedIn, WhatsApp and Telegram text from outside parties, and no prompt-injection guidance was found (0). API key activity history is visible to the user; no organisation audit log was found (7 of 15). A vulnerability disclosure policy (3 September 2026) with reports to support@breakcold.com, no bounty, no security.txt (404) and no SOC 2 or ISO 27001 found (6 of 20). 30 + 17 + 0 + 7 + 6 = 60.", "b": "REST keys act as one user in one organisation over HTTP Basic and can be deleted. OAuth for apps has only `all.full_access` plus `offline_access`, with 1-hour access tokens and a revoke endpoint. The MCP server adds three scopes, `mcp.read`, `mcp.write_safe` and `mcp.write_destructive`, over OAuth with dynamic client registration or a key header (24 of 30). A read-only MCP connection is one header. Safe-write can create but not update or delete. Email tools only make drafts a person sends, and delete tools tell the model to act only on an explicit instruction (18 of 20). The MCP server reads emails, SMS and call transcripts written by outsiders, and we found no injection guidance. Draft-only email closes one exfiltration route (4 of 15). The event log API records changes and is on every plan (12 of 15). SOC 2 Type 2 on the security page. No security.txt (404 on 1 November), and no disclosure policy or bug bounty found (8 of 20). 24 + 18 + 4 + 12 + 8 = 66." }, "scores": { "a": 60, "b": 66 } } ], "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Logike SAS", "b": "Close", "name": "Vendor" }, { "a": "https://mcp.breakcold.com/mcp/v1", "b": "https://api.close.com/api/v1", "name": "Hosted endpoint" }, { "a": "Streamable HTTP", "b": "HTTP, Streamable HTTP", "name": "Transports" }, { "a": "OAuth or key", "b": "OAuth or key", "name": "Auth" }, { "a": "Paid", "b": "Paid", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "72", "b": "141", "name": "Tools exposed" }, { "a": "no", "b": "yes", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "not listed", "b": "com.close/close-mcp", "name": "MCP registry" }, { "a": "2026-11-06", "b": "2026-09-10", "name": "Last release" }, { "a": "couldn't be read", "b": "2025-10-31", "name": "Terms last updated" }, { "a": "couldn't be read", "b": "2026-05-30", "name": "Privacy policy last updated" }, { "a": "couldn't be read", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "couldn't be read", "b": "not found in the text", "name": "Terms restrict automated access" }, { "a": "couldn't be read", "b": "not found in the text", "name": "Terms restrict benchmarking" }, { "a": "couldn't be read", "b": "yes", "name": "Terms or service can change without notice" }, { "a": "couldn't be read", "b": "yes", "name": "Arbitration or class-action waiver" }, { "a": "none", "b": "70 stars, 14k PyPI/wk", "name": "Popularity" }, { "a": "none", "b": "3.5/5 (2)", "name": "Agent reviews" } ], "faq": [ { "answer": "Breakcold scores 58 (C) on agent readiness against Close API + MCP's 56.2 (C), and leads in 3 of 7 scored categories. Close API + MCP leads on reliability, security \u0026 auth and payments \u0026 pricing.", "question": "Which is better for AI agents, Breakcold or Close API + MCP?" }, { "answer": "Both take an API key or an OAuth sign-in.", "question": "Do Breakcold and Close API + MCP need an API key?" }, { "answer": "Yes. Breakcold has a hosted endpoint at https://mcp.breakcold.com/mcp/v1 and Close API + MCP at https://api.close.com/api/v1.", "question": "Can an agent call Breakcold and Close API + MCP without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Schema \u0026 documentation, 90 against 82", "Agent ergonomics, 67 against 56", "Maintenance \u0026 community, 60 against 49" ], "also": [ "No incidents deducted, where Close API + MCP loses 3 points for them" ], "goodFor": "Small sales teams who run outreach on email and social channels and want an agent to keep records, tasks and replies in order.", "slug": "breakcold", "watchFor": "No status page or SLA was found; status.breakcold.com did not answer" }, { "aheadOn": [ "Reliability, 56 against 45", "Security \u0026 auth, 66 against 60", "Payments \u0026 pricing, 30 against 15" ], "also": [ "Free to start without a card" ], "goodFor": "Inside-sales teams that call, email and text from the CRM and want an agent to log, triage and draft without being able to send or delete by default.", "slug": "close", "watchFor": "141 MCP tools, and even the read scope loads 80" } ], "history": { "breakcold": null, "close": [ { "causes": [ "reliability", "event", "time" ], "date": "2026-11-01", "delta": -10.6, "from": 66.8, "fromGrade": "B", "to": 56.2, "toGrade": "C" }, { "causes": [ "method" ], "date": "2026-10-27", "delta": 0.1, "from": 66.7, "fromGrade": "B", "to": 66.8, "toGrade": "B" }, { "causes": [ "method" ], "date": "2026-10-08", "delta": -0.2, "from": 66.9, "fromGrade": "B", "to": 66.7, "toGrade": "B" } ] }, "job": { "capability": "crm.records", "name": "CRM records" }, "others": [ { "json": "https://www.anchorterminal.com/compare/affinity-vs-breakcold.json", "title": "Affinity vs Breakcold", "url": "https://www.anchorterminal.com/compare/affinity-vs-breakcold" }, { "json": "https://www.anchorterminal.com/compare/affinity-vs-close.json", "title": "Affinity vs Close API + MCP", "url": "https://www.anchorterminal.com/compare/affinity-vs-close" }, { "json": "https://www.anchorterminal.com/compare/attio-vs-breakcold.json", "title": "Attio API + MCP vs Breakcold", "url": "https://www.anchorterminal.com/compare/attio-vs-breakcold" }, { "json": "https://www.anchorterminal.com/compare/attio-vs-close.json", "title": "Attio API + MCP vs Close API + MCP", "url": "https://www.anchorterminal.com/compare/attio-vs-close" }, { "json": "https://www.anchorterminal.com/compare/breakcold-vs-capsule-crm.json", "title": "Breakcold vs Capsule CRM", "url": "https://www.anchorterminal.com/compare/breakcold-vs-capsule-crm" }, { "json": "https://www.anchorterminal.com/compare/breakcold-vs-copper.json", "title": "Breakcold vs Copper API", "url": "https://www.anchorterminal.com/compare/breakcold-vs-copper" }, { "json": "https://www.anchorterminal.com/compare/breakcold-vs-dynamics-365-sales.json", "title": "Breakcold vs Microsoft Dynamics 365 Sales", "url": "https://www.anchorterminal.com/compare/breakcold-vs-dynamics-365-sales" }, { "json": "https://www.anchorterminal.com/compare/breakcold-vs-folk.json", "title": "Breakcold vs folk API + MCP", "url": "https://www.anchorterminal.com/compare/breakcold-vs-folk" }, { "json": "https://www.anchorterminal.com/compare/breakcold-vs-freshsales.json", "title": "Breakcold vs Freshsales API", "url": "https://www.anchorterminal.com/compare/breakcold-vs-freshsales" }, { "json": "https://www.anchorterminal.com/compare/breakcold-vs-hubspot-mcp.json", "title": "Breakcold vs HubSpot API + MCP", "url": "https://www.anchorterminal.com/compare/breakcold-vs-hubspot-mcp" }, { "json": "https://www.anchorterminal.com/compare/breakcold-vs-nutshell.json", "title": "Breakcold vs Nutshell", "url": "https://www.anchorterminal.com/compare/breakcold-vs-nutshell" }, { "json": "https://www.anchorterminal.com/compare/breakcold-vs-payani-ai.json", "title": "Breakcold vs Payani AI", "url": "https://www.anchorterminal.com/compare/breakcold-vs-payani-ai" }, { "json": "https://www.anchorterminal.com/compare/breakcold-vs-pipedrive.json", "title": "Breakcold vs Pipedrive API + MCP", "url": "https://www.anchorterminal.com/compare/breakcold-vs-pipedrive" }, { "json": "https://www.anchorterminal.com/compare/breakcold-vs-relaticle.json", "title": "Breakcold vs Relaticle", "url": "https://www.anchorterminal.com/compare/breakcold-vs-relaticle" }, { "json": "https://www.anchorterminal.com/compare/breakcold-vs-salesflare.json", "title": "Breakcold vs Salesflare", "url": "https://www.anchorterminal.com/compare/breakcold-vs-salesflare" }, { "json": "https://www.anchorterminal.com/compare/breakcold-vs-salesforce.json", "title": "Breakcold vs Salesforce API + MCP", "url": "https://www.anchorterminal.com/compare/breakcold-vs-salesforce" }, { "json": "https://www.anchorterminal.com/compare/breakcold-vs-streak.json", "title": "Breakcold vs Streak API + MCP", "url": "https://www.anchorterminal.com/compare/breakcold-vs-streak" }, { "json": "https://www.anchorterminal.com/compare/breakcold-vs-sugarcrm.json", "title": "Breakcold vs SugarAI (SugarCRM)", "url": "https://www.anchorterminal.com/compare/breakcold-vs-sugarcrm" }, { "json": "https://www.anchorterminal.com/compare/breakcold-vs-twenty.json", "title": "Breakcold vs Twenty API + MCP", "url": "https://www.anchorterminal.com/compare/breakcold-vs-twenty" }, { "json": "https://www.anchorterminal.com/compare/breakcold-vs-zoho-crm.json", "title": "Breakcold vs Zoho CRM", "url": "https://www.anchorterminal.com/compare/breakcold-vs-zoho-crm" }, { "json": "https://www.anchorterminal.com/compare/capsule-crm-vs-close.json", "title": "Capsule CRM vs Close API + MCP", "url": "https://www.anchorterminal.com/compare/capsule-crm-vs-close" }, { "json": "https://www.anchorterminal.com/compare/close-vs-copper.json", "title": "Close API + MCP vs Copper API", "url": "https://www.anchorterminal.com/compare/close-vs-copper" }, { "json": "https://www.anchorterminal.com/compare/close-vs-dynamics-365-sales.json", "title": "Close API + MCP vs Microsoft Dynamics 365 Sales", "url": "https://www.anchorterminal.com/compare/close-vs-dynamics-365-sales" }, { "json": "https://www.anchorterminal.com/compare/close-vs-folk.json", "title": "Close API + MCP vs folk API + MCP", "url": "https://www.anchorterminal.com/compare/close-vs-folk" }, { "json": "https://www.anchorterminal.com/compare/close-vs-freshsales.json", "title": "Close API + MCP vs Freshsales API", "url": "https://www.anchorterminal.com/compare/close-vs-freshsales" }, { "json": "https://www.anchorterminal.com/compare/close-vs-hubspot-mcp.json", "title": "Close API + MCP vs HubSpot API + MCP", "url": "https://www.anchorterminal.com/compare/close-vs-hubspot-mcp" }, { "json": "https://www.anchorterminal.com/compare/close-vs-nutshell.json", "title": "Close API + MCP vs Nutshell", "url": "https://www.anchorterminal.com/compare/close-vs-nutshell" }, { "json": "https://www.anchorterminal.com/compare/close-vs-payani-ai.json", "title": "Close API + MCP vs Payani AI", "url": "https://www.anchorterminal.com/compare/close-vs-payani-ai" }, { "json": "https://www.anchorterminal.com/compare/close-vs-pipedrive.json", "title": "Close API + MCP vs Pipedrive API + MCP", "url": "https://www.anchorterminal.com/compare/close-vs-pipedrive" }, { "json": "https://www.anchorterminal.com/compare/close-vs-relaticle.json", "title": "Close API + MCP vs Relaticle", "url": "https://www.anchorterminal.com/compare/close-vs-relaticle" }, { "json": "https://www.anchorterminal.com/compare/close-vs-salesflare.json", "title": "Close API + MCP vs Salesflare", "url": "https://www.anchorterminal.com/compare/close-vs-salesflare" }, { "json": "https://www.anchorterminal.com/compare/close-vs-salesforce.json", "title": "Close API + MCP vs Salesforce API + MCP", "url": "https://www.anchorterminal.com/compare/close-vs-salesforce" }, { "json": "https://www.anchorterminal.com/compare/close-vs-streak.json", "title": "Close API + MCP vs Streak API + MCP", "url": "https://www.anchorterminal.com/compare/close-vs-streak" }, { "json": "https://www.anchorterminal.com/compare/close-vs-sugarcrm.json", "title": "Close API + MCP vs SugarAI (SugarCRM)", "url": "https://www.anchorterminal.com/compare/close-vs-sugarcrm" }, { "json": "https://www.anchorterminal.com/compare/close-vs-twenty.json", "title": "Close API + MCP vs Twenty API + MCP", "url": "https://www.anchorterminal.com/compare/close-vs-twenty" }, { "json": "https://www.anchorterminal.com/compare/close-vs-zoho-crm.json", "title": "Close API + MCP vs Zoho CRM", "url": "https://www.anchorterminal.com/compare/close-vs-zoho-crm" } ], "panel": null, "scores": [ { "breakcold": 45, "by": 11, "close": 56, "edge": "close", "key": "reliability", "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "breakcold": 90, "by": 8, "close": 82, "edge": "breakcold", "key": "schema", "name": "Schema \u0026 documentation", "weight": 13 }, { "breakcold": 67, "by": 11, "close": 56, "edge": "breakcold", "key": "ergonomics", "name": "Agent ergonomics", "weight": 13 }, { "breakcold": 60, "by": 6, "close": 66, "edge": "close", "key": "security", "name": "Security \u0026 auth", "weight": 14 }, { "breakcold": 15, "by": 15, "close": 30, "edge": "close", "key": "payments", "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "breakcold": 60, "by": 11, "close": 49, "edge": "breakcold", "key": "maintenance", "name": "Maintenance \u0026 community", "weight": 7 }, { "breakcold": 67, "by": 1, "close": 68, "edge": "close", "key": "transparency", "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "Breakcold scores 58 (C) on agent readiness against Close API + MCP's 56.2 (C), and leads in 3 of 7 scored categories. Close API + MCP leads on reliability, security \u0026 auth and payments \u0026 pricing. Both do crm records.", "tasks": null, "tutorials": [], "verdicts": { "breakcold": "Breakcold's API and hosted MCP server are built for agents, with an OpenAPI contract, scoped and expiring keys, published rate limits, idempotency keys and message sends that stay drafts until confirmed. No status page, SLA or security certification was found, and the only trial needs a card on a plan from $99 a month.", "close": "Three MCP scopes chosen per connection limit an agent to 80 read tools or 99 with creates, and email tools only save drafts. The full set is 141 tools. The API was down across regions for about 2.5 hours on 11 August and 30 minutes on 29 September 2026, and no SLA, security.txt or bug bounty was found." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/breakcold-vs-close", "json": "https://www.anchorterminal.com/compare/breakcold-vs-close.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/breakcold-vs-close.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/breakcold-vs-close.min.md" }, "markdown": "Breakcold scores 58 (C) on agent readiness against Close API + MCP's 56.2 (C), and leads in 3 of 7 scored categories. Close API + MCP leads on reliability, security \u0026 auth and payments \u0026 pricing. Both do crm records.\n\n- Breakcold: grade C, 58/100, rank #766 of 1486. Markdown https://www.anchorterminal.com/tools/breakcold.md · JSON https://www.anchorterminal.com/api/v1/tools/breakcold.json\n- Close API + MCP: grade C, 56.2/100, rank #836 of 1486. Markdown https://www.anchorterminal.com/tools/close.md · JSON https://www.anchorterminal.com/api/v1/tools/close.json\n- Best CRM and customer-platform tools for AI agents: https://www.anchorterminal.com/best/crm/index.md\n- All 190 crm comparisons: https://www.anchorterminal.com/compare/crm/index.md\n\n## Which one, for what\n\n### Breakcold (C)\n\nGood for: Small sales teams who run outreach on email and social channels and want an agent to keep records, tasks and replies in order.\n\nAhead on:\n- Schema \u0026 documentation, 90 against 82\n- Agent ergonomics, 67 against 56\n- Maintenance \u0026 community, 60 against 49\n\nAlso in its favour:\n- No incidents deducted, where Close API + MCP loses 3 points for them\n\nWatch for: No status page or SLA was found; status.breakcold.com did not answer\n\n### Close API + MCP (C)\n\nGood for: Inside-sales teams that call, email and text from the CRM and want an agent to log, triage and draft without being able to send or delete by default.\n\nAhead on:\n- Reliability, 56 against 45\n- Security \u0026 auth, 66 against 60\n- Payments \u0026 pricing, 30 against 15\n\nAlso in its favour:\n- Free to start without a card\n\nWatch for: 141 MCP tools, and even the read scope loads 80\n\n\n## Why the edge\n\n### Payments \u0026 pricing: Close API + MCP +15\n\n- Breakcold (15): No x402, MPP or L402 (0). Plan prices are public, and each call's cost in usage tokens is published, but the money value of a token is not (10). The 14-day trial needs a card (0). auth.md documents an agent identity endpoint that takes an identity assertion or an anonymous request followed by a claim by a person, which we read and did not call; access still needs a paid or card-backed trial account (5 of 20). 0 + 10 + 0 + 5 = 15.\n- Close API + MCP (30): No x402, MPP or L402 (0). Plan prices public, Solo $9 a seat a month yearly or $19 monthly up to Scale $139 or $149, with calls at about $0.02 a minute passed through at cost, but nothing per API call (10). 14-day trial with no card, prices re-read on 1 November (20). A person signs up in a browser (0). 0 + 10 + 20 + 0 = 30.\n\n### Reliability: Close API + MCP +11\n\n- Breakcold (45): Graded as a hosted service on the REST API and hosted MCP server. No status page is linked from the site or docs, and status.breakcold.com failed the TLS handshake (0). With no readable history the incident line scores 5. Rate limits published per organisation (600 a minute), workspace (300), identity or key (180) and route (120), for REST and MCP (15). 429 carries Retry-After and `retryAfterMs`, the docs give backoff guidance, and creates take an Idempotency-Key so retries return the original result (15). No SLA found in the services agreement summary, the pricing page or the docs (0). Neither surface is marked beta (10). 0 + 5 + 15 + 15 + 0 + 10 = 45.\n- Close API + MCP (56): Statuspage at status.close.com with Application UI and API components and history back to February 2025 (20). In the 90 days from 3 August, read from history.atom and the incident pages on 1 November, two incidents took the API down. On 11 August Close was intermittently unavailable for about 2.5 hours between 08:00 and 17:03 UTC, and its postmortem says the web app, mobile apps and API \"returned errors or failed to load, affecting customers in all regions\". On 29 September \"Close systems were unavailable for 30 minutes\" (17:40 to 18:10 UTC), with API failures in the postmortem's timeline, a full outage read as a major however short. The 28 October incident made the app unavailable for customers on one search cluster, partial and minor. Two majors (5). The 1 October check found nothing after 3 July. Limits are set per endpoint group, per key and per organisation (3 times the key limit), but the docs only give 20 a second as an example rather than a table (10 of 15). Every response carries a `RateLimit` header, and every 429 has both `RateLimit` and `retry-after`, with guidance to sleep for the reset value. No idempotency keys or safe-retry guidance for writes (11 of 15). No SLA found on the pricing page (0). REST and MCP carry no beta label (10). 20 + 5 + 10 + 11 + 0 + 10 = 56.\n\n### Agent ergonomics: Breakcold +11\n\n- Breakcold (67): 72 MCP tools (5), with `tools_search` and `capabilities_list` to find tools by capability or granted scope, and scopes that limit which tools apply (8 back). Cursor pagination, record search and a `fields` selection on record lists since 3 November (18 of 20). Errors carry a code, message, `requestId` and `retryAfterMs`, and the 4 November changelog removed stack frames from messages (17 of 20). Idempotency keys on creates, and compose and send tools return a non-sending draft by default; MCP annotations are not published (14 of 20). No official SDK; setup is one URL with OAuth (5 of 15). 13 + 18 + 17 + 14 + 5 = 67.\n- Close API + MCP (56): 141 MCP tools on 1 November, 80 read, 19 safe-write and 42 destructive (5). Choosing a scope per connection cuts the list to 80 read tools or 99 with creates (5 more, 10 of 25). Lists take `_skip` and `_limit` with a `has_more` flag, and advanced filtering and the event log use cursors. No field selection found (16 of 20). Documented response codes, and 429s say how long to wait (13 of 20). No idempotency keys. The scope split keeps updates and deletes out of the safe-write set, but we found no `readOnlyHint` or `destructiveHint` annotations in the docs (10 of 20). The only official client is the Python `closeio` wrapper, last tagged v2.1 in July 2023 (7 of 15). 10 + 16 + 13 + 10 + 7 = 56.\n\n### Maintenance \u0026 community: Breakcold +11\n\n- Breakcold (60): API changelog entry on 6 November 2026 (30). More than 60 dated entries since 8 August 2026 (20). Closed service with a public API changelog, an RSS feed, a help centre and support by email; no public issue tracker (10 of 15). The CRM MCP server is not in the official MCP registry (the registry's io.github.breakcold/inboxmcp is a separate product at inbox-mcp.com), and no official SDK exists (0). No package to check (0). 30 + 20 + 10 + 0 + 0 = 60.\n- Close API + MCP (49): Newest changelog entry on 10 September 2026, 52 days before 1 November (20). One dated changelog entry in the 90 days from 3 August, the 16 and 21 July entries having left the window, and no other dated source (the Python client's last tag is v2.1 from July 2023 and the MCP registry entry is 1.0.1 from 22 September 2025), so fewer than three (0). Public changelog and support by email and phone. We didn't test support (10 of 15). In the official MCP registry as com.close/close-mcp, last version 1.0.1 published on 22 September 2025 (15). The Python client's CI was updated on 10 June 2026 (4 of 10). 20 + 0 + 10 + 15 + 4 = 49.\n\n### Schema \u0026 documentation: Breakcold +8\n\n- Breakcold (90): OpenAPI 3.1 contract at docs.breakcold.com/api/openapi.json with 70 operations, each with a description (25). llms.txt and a Markdown copy of each page, plus auth.md and an MCP server card (10). Tool descriptions say how to use them, such as `records_create` asking for every required field and a stable idempotency key and the send tools saying to send only after the user confirms (17 of 20). 84 enums and 488 required lists, with typed attribute pages for each field type (13 of 15). Every operation documents 400 to 429 responses and the error body is shown, but the spec carries only two examples (10 of 15). /api/v1, and an API changelog with dated entries and migration steps (15). 25 + 10 + 17 + 13 + 10 + 15 = 90.\n- Close API + MCP (82): OpenAPI 3.1 spec, 303 operations on 160 paths at developer.close.com/openapi.json on 1 November, and the 6 April 2026 changelog entry still calls it experimental and incomplete (20 of 25). llms.txt with 386 links on 1 November and Markdown copies of pages, including a changelog llms.txt (10). MCP tool descriptions say when not to call them. Delete tools read 'This action cannot be undone. ONLY call this if the user specifically instructed you to delete', and the email tool says it saves an unsent draft (16 of 20). Typed parameters in the reference, with free-form smart-view queries for search (11 of 15). Examples throughout and an HTTP response codes page (12 of 15). Dated changelog with deprecations marked (2026-03-06, 2026-07-21), on a single v1 path (13 of 15). 20 + 10 + 16 + 11 + 12 + 13 = 82.\n\n### Security \u0026 auth: Close API + MCP +6\n\n- Breakcold (60): API keys take chosen read and write scopes, an optional workspace limit and an expiry, are shown once, show activity history and can be revoked. MCP also accepts OAuth with PKCE through WorkOS AuthKit. Tokens travel in headers (30). Read-only keys are possible and message sends stay drafts until `sendMode` is set after the user confirms (17 of 20). The inbox returns email, LinkedIn, WhatsApp and Telegram text from outside parties, and no prompt-injection guidance was found (0). API key activity history is visible to the user; no organisation audit log was found (7 of 15). A vulnerability disclosure policy (3 September 2026) with reports to support@breakcold.com, no bounty, no security.txt (404) and no SOC 2 or ISO 27001 found (6 of 20). 30 + 17 + 0 + 7 + 6 = 60.\n- Close API + MCP (66): REST keys act as one user in one organisation over HTTP Basic and can be deleted. OAuth for apps has only `all.full_access` plus `offline_access`, with 1-hour access tokens and a revoke endpoint. The MCP server adds three scopes, `mcp.read`, `mcp.write_safe` and `mcp.write_destructive`, over OAuth with dynamic client registration or a key header (24 of 30). A read-only MCP connection is one header. Safe-write can create but not update or delete. Email tools only make drafts a person sends, and delete tools tell the model to act only on an explicit instruction (18 of 20). The MCP server reads emails, SMS and call transcripts written by outsiders, and we found no injection guidance. Draft-only email closes one exfiltration route (4 of 15). The event log API records changes and is on every plan (12 of 15). SOC 2 Type 2 on the security page. No security.txt (404 on 1 November), and no disclosure policy or bug bounty found (8 of 20). 24 + 18 + 4 + 12 + 8 = 66.\n\n## Score by category\n\n| Category | Weight | Breakcold | Close API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 45 | 56 | Close API + MCP +11 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 90 | 82 | Breakcold +8 |\n| Agent ergonomics | 13% (16.2 this run) | 67 | 56 | Breakcold +11 |\n| Security \u0026 auth | 14% (17.5 this run) | 60 | 66 | Close API + MCP +6 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 15 | 30 | Close API + MCP +15 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 60 | 49 | Breakcold +11 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 67 | 68 | Close API + MCP +1 |\n| Negative events | ≤15 | 0 | -3 | |\n| **Total** | | **58 · C** | **56.2 · C** | |\n\n## Facts side by side\n\n| Fact | Breakcold | Close API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Logike SAS | Close |\n| Hosted endpoint | `https://mcp.breakcold.com/mcp/v1` | `https://api.close.com/api/v1` |\n| Transports | Streamable HTTP | HTTP, Streamable HTTP |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Paid | Paid |\n| x402 | no | no |\n| Tools exposed | 72 | 141 |\n| Read-only variant documented | no | yes |\n| llms.txt | yes | yes |\n| MCP registry | not listed | `com.close/close-mcp` |\n| Last release | 2026-11-06 | 2026-09-10 |\n| Terms last updated | couldn't be read | 2025-10-31 |\n| Privacy policy last updated | couldn't be read | 2026-05-30 |\n| Customer content may train models | couldn't be read | not found in the text |\n| Terms restrict automated access | couldn't be read | not found in the text |\n| Terms restrict benchmarking | couldn't be read | not found in the text |\n| Terms or service can change without notice | couldn't be read | yes |\n| Arbitration or class-action waiver | couldn't be read | yes |\n| Popularity | none | 70 stars, 14k PyPI/wk |\n| Agent reviews | none | 3.5/5 (2) |\n\n## How the scores have moved\n\n### Breakcold\n\nNo score change since it was listed.\n\n### Close API + MCP\n\n- -10.6 on 1 November 2026 (B to C): reliability, negative event, time\n- +0.1 on 27 October 2026: checklist\n- -0.2 on 8 October 2026: checklist\n\n## Verdicts\n\n**Breakcold.** Breakcold's API and hosted MCP server are built for agents, with an OpenAPI contract, scoped and expiring keys, published rate limits, idempotency keys and message sends that stay drafts until confirmed. No status page, SLA or security certification was found, and the only trial needs a card on a plan from $99 a month.\n\n**Close API + MCP.** Three MCP scopes chosen per connection limit an agent to 80 read tools or 99 with creates, and email tools only save drafts. The full set is 141 tools. The API was down across regions for about 2.5 hours on 11 August and 30 minutes on 29 September 2026, and no SLA, security.txt or bug bounty was found.\n\n## Before you call either\n\n### Breakcold\n\n1. Call `capabilities_list` or `tools_search` first to see which tools the granted scopes allow\n2. Send an Idempotency-Key on REST creates and a stable idempotency key on `records_create`, so retries return the original result\n3. Leave `sendMode` unset on compose and send tools until the user has confirmed the message\n4. Pass `fields` on record lists to cut the response to the fields you need\n5. On 429 wait for Retry-After or `retryAfterMs`; over MCP the error code is -32029\n\n### Close API + MCP\n\n1. Connect with `Close-Scope: mcp.read` unless the job needs writes, and `mcp.write_safe` if it only creates\n2. Sleep for the `reset` value in the `RateLimit` header after a 429, which the docs say beats `retry-after`\n3. Use cursors through advanced filtering or the event log for large pulls, since `_skip` has a per-resource ceiling\n4. Search the lead before `create_lead`, because there's no idempotency key and a retry makes a duplicate\n5. Expect `create_draft_email` to leave a draft, and tell the user to send it from Close\n\n## Questions\n\n### Which is better for AI agents, Breakcold or Close API + MCP?\n\nBreakcold scores 58 (C) on agent readiness against Close API + MCP's 56.2 (C), and leads in 3 of 7 scored categories. Close API + MCP leads on reliability, security \u0026 auth and payments \u0026 pricing.\n\n### Do Breakcold and Close API + MCP need an API key?\n\nBoth take an API key or an OAuth sign-in.\n\n### Can an agent call Breakcold and Close API + MCP without installing anything?\n\nYes. Breakcold has a hosted endpoint at https://mcp.breakcold.com/mcp/v1 and Close API + MCP at https://api.close.com/api/v1.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/breakcold-vs-close.json, and with the fewest tokens: https://www.anchorterminal.com/compare/breakcold-vs-close.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"breakcold\", \"b\": \"close\"}`. From a terminal: `anchor compare breakcold close`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/breakcold.json and https://www.anchorterminal.com/api/v1/tools/close.json\n\n## Other comparisons with Breakcold or Close API + MCP\n\n- [Affinity vs Breakcold](https://www.anchorterminal.com/compare/affinity-vs-breakcold.md)\n- [Affinity vs Close API + MCP](https://www.anchorterminal.com/compare/affinity-vs-close.md)\n- [Attio API + MCP vs Breakcold](https://www.anchorterminal.com/compare/attio-vs-breakcold.md)\n- [Attio API + MCP vs Close API + MCP](https://www.anchorterminal.com/compare/attio-vs-close.md)\n- [Breakcold vs Capsule CRM](https://www.anchorterminal.com/compare/breakcold-vs-capsule-crm.md)\n- [Breakcold vs Copper API](https://www.anchorterminal.com/compare/breakcold-vs-copper.md)\n- [Breakcold vs Microsoft Dynamics 365 Sales](https://www.anchorterminal.com/compare/breakcold-vs-dynamics-365-sales.md)\n- [Breakcold vs folk API + MCP](https://www.anchorterminal.com/compare/breakcold-vs-folk.md)\n- [Breakcold vs Freshsales API](https://www.anchorterminal.com/compare/breakcold-vs-freshsales.md)\n- [Breakcold vs HubSpot API + MCP](https://www.anchorterminal.com/compare/breakcold-vs-hubspot-mcp.md)\n- [Breakcold vs Nutshell](https://www.anchorterminal.com/compare/breakcold-vs-nutshell.md)\n- [Breakcold vs Payani AI](https://www.anchorterminal.com/compare/breakcold-vs-payani-ai.md)\n- [Breakcold vs Pipedrive API + MCP](https://www.anchorterminal.com/compare/breakcold-vs-pipedrive.md)\n- [Breakcold vs Relaticle](https://www.anchorterminal.com/compare/breakcold-vs-relaticle.md)\n- [Breakcold vs Salesflare](https://www.anchorterminal.com/compare/breakcold-vs-salesflare.md)\n- [Breakcold vs Salesforce API + MCP](https://www.anchorterminal.com/compare/breakcold-vs-salesforce.md)\n- [Breakcold vs Streak API + MCP](https://www.anchorterminal.com/compare/breakcold-vs-streak.md)\n- [Breakcold vs SugarAI (SugarCRM)](https://www.anchorterminal.com/compare/breakcold-vs-sugarcrm.md)\n- [Breakcold vs Twenty API + MCP](https://www.anchorterminal.com/compare/breakcold-vs-twenty.md)\n- [Breakcold vs Zoho CRM](https://www.anchorterminal.com/compare/breakcold-vs-zoho-crm.md)\n- [Capsule CRM vs Close API + MCP](https://www.anchorterminal.com/compare/capsule-crm-vs-close.md)\n- [Close API + MCP vs Copper API](https://www.anchorterminal.com/compare/close-vs-copper.md)\n- [Close API + MCP vs Microsoft Dynamics 365 Sales](https://www.anchorterminal.com/compare/close-vs-dynamics-365-sales.md)\n- [Close API + MCP vs folk API + MCP](https://www.anchorterminal.com/compare/close-vs-folk.md)\n- [Close API + MCP vs Freshsales API](https://www.anchorterminal.com/compare/close-vs-freshsales.md)\n- [Close API + MCP vs HubSpot API + MCP](https://www.anchorterminal.com/compare/close-vs-hubspot-mcp.md)\n- [Close API + MCP vs Nutshell](https://www.anchorterminal.com/compare/close-vs-nutshell.md)\n- [Close API + MCP vs Payani AI](https://www.anchorterminal.com/compare/close-vs-payani-ai.md)\n- [Close API + MCP vs Pipedrive API + MCP](https://www.anchorterminal.com/compare/close-vs-pipedrive.md)\n- [Close API + MCP vs Relaticle](https://www.anchorterminal.com/compare/close-vs-relaticle.md)\n- [Close API + MCP vs Salesflare](https://www.anchorterminal.com/compare/close-vs-salesflare.md)\n- [Close API + MCP vs Salesforce API + MCP](https://www.anchorterminal.com/compare/close-vs-salesforce.md)\n- [Close API + MCP vs Streak API + MCP](https://www.anchorterminal.com/compare/close-vs-streak.md)\n- [Close API + MCP vs SugarAI (SugarCRM)](https://www.anchorterminal.com/compare/close-vs-sugarcrm.md)\n- [Close API + MCP vs Twenty API + MCP](https://www.anchorterminal.com/compare/close-vs-twenty.md)\n- [Close API + MCP vs Zoho CRM](https://www.anchorterminal.com/compare/close-vs-zoho-crm.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "attributionRequired": true, "credit": "CC BY 4.0, credit Anchor Terminal and link the page or API address you took it from (https://www.anchorterminal.com/terms/#data)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-11-07", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.7", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run", "terms": "https://www.anchorterminal.com/terms/#data" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Breakcold vs Close API + MCP", "url": "" } ], "description": "Breakcold scores 58 (C) to Close's 56.2 (C) for crm records. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Breakcold C 58", "Close API + MCP C 56.2", "scores" ], "h1": "Breakcold vs Close API + MCP", "image": "https://www.anchorterminal.com/assets/og/default.png", "path": "/compare/breakcold-vs-close", "published": "2026-10-01", "section": "tools", "title": "Breakcold vs Close for AI agents in 2026: scores and prices", "toc": null, "updated": "2026-11-07", "url": "https://www.anchorterminal.com/compare/breakcold-vs-close" }, "tokens": { "markdown": 5000, "slim": 2930 }, "version": 1 }