{ "data": { "a": { "slug": "crustdata", "name": "Crustdata API + MCP", "vendor": "Crustdata", "vendorUrl": "https://crustdata.com", "kind": "http-api", "category": "lead-data", "summary": "Company, person, job, web and social post search and enrichment, with live web lookups, batch jobs and watchers that push changes to a webhook.", "url": "https://www.anchorterminal.com/tools/crustdata", "markdownUrl": "https://www.anchorterminal.com/tools/crustdata.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/crustdata.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/crustdata.json", "dns": "crustdata.grade.anchorterminal.com", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://api.crustdata.com", "packages": [], "auth": "mixed", "authNotes": "`authorization: Bearer` API key plus a pinned `x-api-version: 2025-11-01` header (without it you get the latest version, which may break). Hosted MCP at install.crustdata.com uses OAuth, or the API key as a bearer token for headless clients.", "pricing": "usage", "pricingNotes": "Credit-based, with no public dollar price per credit. Every new self-serve account gets $20 in free credits; credits are bought in packages through Stripe checkout or auto top-up and last 12 months. Enterprise plans start at four figures a month through sales. Person and company search 0.03 credits a result plus 0.1 to 2.5 for premium filter or response fields, person enrich 1 to 4 plus add-ons, company enrich 2 to 4, contact enrich (emails and phones) on enterprise plans, identify and autocomplete free. Watchers run 0.5 to 150 credits per delivered record depending on refresh SLA (https://crustdata.com/pricing, checked 2026-11-04).", "priceSummary": "Pay per use", "where": "hosted", "x402": { "level": "no", "evidence": "No x402 mention in the API docs, MCP docs or pricing (checked 2026-09-30).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-09-30" }, "docsUrl": "https://docs.crustdata.com", "llmsTxt": "https://docs.crustdata.com/llms.txt", "openapi": "https://docs.crustdata.com/openapi-specs/2025-11-01/person.yaml", "capabilities": [ "lead.search", "lead.enrichment", "data.company", "data.person" ], "tags": [ "lead-search", "enrichment", "hosted", "mcp", "llms-txt", "openapi", "webhooks", "async-jobs", "closed-source" ], "graded": true, "anchor": { "graded": true, "score": 52, "grade": "D", "agentReady": false, "rank": 997, "ranked": true, "rankOf": 1486, "categoryRank": 14, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 73, "maintenance": 57, "payments": 5, "reliability": 42, "schema": 89, "security": 56, "transparency": 56 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-04" }, "negative": -3, "negativeNotes": [ "September 2026. The changelog says `config.refresh_frequency_days` is now refused on discovery watches, and that batch submits on capped keys are now refused with 402 `credit_limit_exceeded` before they start, both inside the pinned version 2025-11-01 and posted with the change, with no advance notice found. Changes to existing calls posted when they took effect, one folded -3 (https://docs.crustdata.com/openapi-specs/2025-11-01/changelog.md)" ], "verdict": "Per-field credit prices readable per account, `X-Credits-Used` on every response, per-key caps and $20 in free credits for new self-serve accounts. No status page, no SLA, no dollar price per credit, and changes that refuse earlier valid requests posted only after they shipped.", "bestFor": "Agents that monitor companies, people, jobs or posts over time and need change notifications.", "strengths": [ "Per-field credit prices, readable per account from `/account/endpoints`, and `X-Credits-Used` on every response", "Per-key endpoint restrictions and monthly credit caps", "Rate-limit headers, typed 429 errors and back-off guidance", "Opt-out portal for data subjects with removal in 30 days", "Every new self-serve account starts with $20 in free credits, and identify, autocomplete and batch status calls are free", "Eight OpenAPI files, llms.txt and a detailed changelog with migration guides" ], "weaknesses": [ "No status page and no SLA", "No public dollar price per credit, and enterprise plans go through sales", "Behaviour changes for existing calls posted only after they shipped, inside the pinned version 2025-11-01", "Changelog entries carry only a month, with no exact dates or feed", "Terms cover website use only, and terms and privacy policy name different companies" ], "agentNotes": [ "Always send `x-api-version: 2025-11-01`. Unpinned calls get the latest version", "Call `/account/endpoints` first to see what your plan enables and what each field costs", "Ask only for the premium field groups you need, since each one bills", "Poll `GET /batch/{id}` before submitting more batch jobs. Active jobs count against a cap of 5 to 30", "Read the `crustdata://catalog` resource before calling MCP tools" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 2.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "D", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 52 } ], "editorialScores": { "ergonomics": 73, "maintenance": 57, "payments": 5, "reliability": 42, "schema": 89, "security": 56, "transparency": 36 }, "provenanceScore": 76, "checked": { "categories": { "ergonomics": "2026-11-04", "maintenance": "2026-11-04", "payments": "2026-11-04", "reliability": "2026-11-04", "schema": "2026-11-04", "security": "2026-11-04", "transparency": "2026-11-04" }, "last": "2026-11-04", "lastMoved": "2026-11-04", "oldest": "2026-11-04", "stale": false, "staleAfterDays": 90 } }, "connect": { "http": "curl -X POST https://api.crustdata.com/company/identify -H \"authorization: Bearer $CRUSTDATA_API_KEY\" \\\n -H \"content-type: application/json\" -H \"x-api-version: 2025-11-01\" -d '{\"domains\":[\"retool.com\"]}'", "claudeCode": "claude mcp add --transport http crustdata https://install.crustdata.com/mcp" }, "letme": { "capability": "https://letme.dev/lead.search", "tool": "https://letme.dev/crustdata" }, "area": "web-data", "provenance": { "legalEntity": "Crustdata Inc.", "domain": "crustdata.com", "domainRegistered": "2019-03-18", "endpointOnVendorDomain": true, "terms": "https://crustdata.com/terms", "privacy": "https://crustdata.com/privacy", "statusPage": "", "changelog": "https://docs.crustdata.com/openapi-specs/2025-11-01/changelog", "securityTxt": "none", "checked": "2026-10-01", "notes": [ "The terms page is a generic website-use notice naming CrustData Inc. (California). We found no published API terms of service", "The privacy policy, last updated 19 May 2025, names Crustdata Technologies Inc.", "status.crustdata.com doesn't resolve" ], "score": 76 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/crustdata.json", "live": { "slug": "crustdata", "probe": { "target": "https://api.crustdata.com", "method": "get", "lastAt": "2026-11-07T18:20:19.525561868Z", "lastOk": true, "lastStatus": 404, "lastMs": 344, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 307, "p95ms24h": 407, "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": 252 }, { "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": 248, "ok": 248 }, { "date": "2026-10-30", "probes": 249, "ok": 249 }, { "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 } ] }, "securityTxt": { "url": "https://crustdata.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T16:01:11.091580975Z" }, "llmsTxt": { "url": "https://docs.crustdata.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:32:14.212421429Z" }, "domain": { "domain": "crustdata.com", "registered": "2019-03-18", "source": "https://rdap.verisign.com/com/v1/domain/crustdata.com", "checkedAt": "2026-11-01T14:10:36.406343824Z" }, "pages": [ { "url": "https://docs.crustdata.com/openapi-specs/2025-11-01/changelog", "kind": "changelog", "status": 200, "checkedAt": "2026-11-07T14:06:02.232295583Z", "changedAt": "2026-10-16T22:21:54.2260964Z", "fingerprint": "b9431b9db457" }, { "url": "https://crustdata.com/pricing", "kind": "pricing", "status": 304, "checkedAt": "2026-11-07T14:02:09.908802031Z", "changedAt": "2026-10-15T21:22:30.827877112Z", "fingerprint": "d38eaa6df07c" }, { "url": "https://crustdata.com/privacy", "kind": "privacy", "status": 304, "checkedAt": "2026-11-07T14:02:11.990650197Z", "changedAt": "2026-10-07T18:03:44.239771626Z", "fingerprint": "a4d0779e39cf" }, { "url": "https://crustdata.com/terms", "kind": "terms", "status": 304, "checkedAt": "2026-11-07T14:02:13.948397523Z", "changedAt": "2026-10-07T18:03:46.248879235Z", "fingerprint": "3cce651de60c" } ], "mcpTools": { "url": "https://install.crustdata.com/mcp", "checkedAt": "2026-11-07T01:43:41.261111993Z", "status": "auth", "note": "asks for credentials before listing its tools", "changedAt": "2026-11-07T01:43:41.261111993Z" }, "updatedAt": "2026-11-07T18:20:19.525561868Z" } }, "answer": "ZeroBounce scores 62.4 (B) on agent readiness against Crustdata API + MCP's 52 (D), and leads in 5 of 7 scored categories. Crustdata API + MCP leads on schema \u0026 documentation.", "b": { "slug": "zerobounce", "name": "ZeroBounce", "vendor": "Hertza L.L.C. (ZeroBounce)", "vendorUrl": "https://www.zerobounce.net", "kind": "http-api", "category": "lead-data", "summary": "ZeroBounce is an email verification API from Hertza L.L.C. that checks single addresses and lists for deliverability, with status and sub-status codes, plus AI scoring, email finder, domain search and activity data, and an open-source MCP server.", "url": "https://www.anchorterminal.com/tools/zerobounce", "markdownUrl": "https://www.anchorterminal.com/tools/zerobounce.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/zerobounce.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/zerobounce.json", "dns": "zerobounce.grade.anchorterminal.com", "repo": "https://github.com/zerobounce", "license": "Proprietary service under ZeroBounce's terms of use; SDKs and the MCP server are open source", "transports": [ "http", "stdio" ], "remoteUrl": "https://api.zerobounce.net/v2", "packages": [ { "registry": "npm", "name": "@zerobounce/zero-bounce-sdk" } ], "auth": "api-key", "authNotes": "API key from the dashboard, sent as the `api_key` query parameter in the documented calls. Several keys per account besides a Master key; keys can be named, switched off, regenerated, deleted and limited to whitelisted IPs or ranges. No endpoint scopes found.", "pricing": "usage", "pricingNotes": "Pay as you go from $39 for 2,000 validations, one credit per email, 20 per successful Email Finder query, nothing for unknown results. ZeroBounce ONE from $99 a month, minimum 10,000 credits. Freemium of 100 validations a month for business or premium domains. Credits bought after 1 June 2026 expire two years after the last purchase (https://www.zerobounce.net/pricing, https://www.zerobounce.net/terms-of-use, checked 2026-11-06).", "priceSummary": "$0.0195 / call", "where": "both", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs, pricing or MCP page (checked 2026-11-06).", "endpoints": [] }, "toolCount": 0, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-11-06" }, "docsUrl": "https://www.zerobounce.net/docs/", "llmsTxt": "https://www.zerobounce.net/llms.txt", "capabilities": [ "email.verification", "email.finder", "lead.enrichment" ], "tags": [ "hosted", "mcp", "status-page", "soc2", "iso27001", "free-tier", "usage-based", "typescript", "eu-region", "closed-source" ], "lastRelease": "2026-10-25", "graded": true, "anchor": { "graded": true, "score": 62.4, "grade": "B", "agentReady": false, "rank": 559, "ranked": true, "rankOf": 1486, "categoryRank": 4, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 69, "maintenance": 70, "payments": 35, "reliability": 75, "schema": 54, "security": 65, "transparency": 63 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-06" }, "negative": 0, "verdict": "ZeroBounce's v2 API verifies emails with detailed status and sub-status codes, publishes per-endpoint limits, a Statuspage with short incidents only in the last 90 days, SOC 2 Type 2 and ISO 27001, and $0.0195 per email at the smallest pack. The documented key travels in the query string, and there is no OpenAPI contract.", "bestFor": "Email verification before outreach, the verification-first listing in lead-data.", "strengths": [ "Status and sub-status codes per address, and unknown results don't use credits", "Statuspage with API, API-US, API-EU and Bulk API components; three short incidents in the 90 days to 6 November 2026", "Rate limits published per endpoint group, with the block length for each", "SOC 2 Type 2, ISO/IEC 27001:2022, Intigriti testing and a published sub-processor list", "Freemium of 100 validations a month for business domains, and pay-as-you-go from $39 for 2,000" ], "weaknesses": [ "Every documented example sends the key as an `api_key` query parameter", "No OpenAPI or other machine-readable contract; a Postman collection only", "Going over a limit blocks the key for a minute to a day, with no Retry-After documented", "llms.txt lists marketing pages, not the API docs", "Keys can be IP-whitelisted but not scoped to endpoints" ], "agentNotes": [ "Use the regional host (api-us or api-eu) that matches the data, and test with the sandbox addresses, which spend no credits", "Set `timeout` (3 to 60 seconds); slow mail servers return unknown, which is free to retry later", "Stay under 80,000 validations per 10 seconds and avoid repeated bad requests, which block the key for an hour", "Use the bulk file API for large lists instead of looping on /v2/validate", "Keep the key out of logs; the API takes it only as `api_key` in the URL" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "B", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 62.4 } ], "editorialScores": { "ergonomics": 69, "maintenance": 70, "payments": 35, "reliability": 75, "schema": 54, "security": 65, "transparency": 59 }, "provenanceScore": 67, "checked": { "categories": { "ergonomics": "2026-11-06", "maintenance": "2026-11-06", "payments": "2026-11-06", "reliability": "2026-11-06", "schema": "2026-11-06", "security": "2026-11-06", "transparency": "2026-11-06" }, "last": "2026-11-06", "oldest": "2026-11-06", "stale": false, "staleAfterDays": 90 } }, "connect": { "http": "curl \"https://api.zerobounce.net/v2/validate?api_key=$ZEROBOUNCE_API_KEY\u0026email=valid@example.com\"" }, "letme": { "capability": "https://letme.dev/email.verification", "tool": "https://letme.dev/zerobounce" }, "area": "web-data", "unitPrices": [ { "item": "Email validation, smallest pay-as-you-go pack", "unit": "call", "usd": 0.0195, "note": "$39 for 2,000 validations" }, { "item": "ZeroBounce ONE", "unit": "month", "usd": 99, "note": "From $99 a month" } ], "provenance": { "legalEntity": "Hertza L.L.C.", "domain": "zerobounce.net", "domainRegistered": "", "endpointOnVendorDomain": true, "terms": "https://www.zerobounce.net/terms-of-use", "privacy": "https://www.zerobounce.net/privacy-policy", "statusPage": "https://status.zerobounce.net", "changelog": "", "securityTxt": "unknown", "checked": "2026-11-06", "notes": [ "Terms of use name Hertza L.L.C., doing business as ZeroBounce, a Nevada LLC, under Nevada law; the terms take effect on the date accepted. Privacy policy last updated 30 June 2026.", "www.zerobounce.net/robots.txt allows all and names ClaudeBot as allowed. status.zerobounce.net disallows /api/ and /embed/; its history was read from history.rss.", "No public changelog for the API was found.", "security.txt was not checked." ], "score": 67 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/zerobounce.json", "live": { "slug": "zerobounce", "probe": { "target": "https://api.zerobounce.net/v2", "method": "get", "lastAt": "2026-11-07T18:21:07.244618017Z", "lastOk": true, "lastStatus": 404, "lastMs": 126, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 69, "p95ms24h": 170, "samples24h": 200, "samples30d": 200, "days": [ { "date": "2026-11-06", "probes": 13, "ok": 13 }, { "date": "2026-11-07", "probes": 187, "ok": 187 } ] }, "vendorStatus": { "page": "https://status.zerobounce.net", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-11-07T18:22:13.130992469Z" }, "versions": [ { "registry": "npm", "name": "@zerobounce/zero-bounce-sdk", "version": "3.0.0", "seenAt": "2026-11-07T00:19:09.899173295Z" } ], "npmWeekly": 36734, "securityTxt": { "url": "https://zerobounce.net/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T15:59:52.305113224Z" }, "llmsTxt": { "url": "https://www.zerobounce.net/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:34:27.000344109Z" }, "pages": [ { "url": "https://www.zerobounce.net/pricing", "kind": "pricing", "status": 200, "checkedAt": "2026-11-07T14:37:41.302855774Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "6cbf992fb3f3" }, { "url": "https://www.zerobounce.net/privacy-policy", "kind": "privacy", "status": 200, "checkedAt": "2026-11-07T14:37:45.799553831Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "6267cfec1592" }, { "url": "https://www.zerobounce.net/terms-of-use", "kind": "terms", "status": 200, "checkedAt": "2026-11-07T14:37:45.965675933Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "08727e5bbf09" } ], "updatedAt": "2026-11-07T18:22:13.130992469Z" } }, "edges": [ { "by": 35, "category": "schema", "leads": "crustdata", "name": "Schema \u0026 documentation", "reasons": { "a": "Eight OpenAPI YAML files for version 2025-11-01, one per API group (account, batch, company, job, person, social_post, watch, web) (25). llms.txt with Markdown twins (10). Endpoint pages explain cost and when to search versus enrich (17 of 20). Typed filter trees with documented operators (12 of 15). Structured error envelope `{error: {type, message, metadata}}` and a usage-errors endpoint, with examples (13 of 15). Date-pinned API versions and a detailed changelog. Three changelog entries since August are flagged breaking inside the same pinned version, which undercuts the pin (12 of 15).", "b": "No OpenAPI or other machine-readable contract found; a Postman collection is linked (5 of 25). llms.txt lists marketing pages, and the docs have no Markdown twins (5 of 10). Endpoint pages explain timing, credits and when to use batch or file APIs (14 of 20). Parameter tables and listed status and sub-status values, including the ai_agent_mailbox sub-status added in July 2026 (10 of 15). Examples per endpoint, a sandbox and an error-code page (12 of 15). v2 paths, an API migration page and dated maintenance notices on the status page, with no API changelog (8 of 15). 5+5+14+10+12+8 = 54." }, "scores": { "a": 89, "b": 54 } }, { "by": 33, "category": "reliability", "leads": "zerobounce", "name": "Reliability", "reasons": { "a": "No status page found. status.crustdata.com still doesn't answer and the docs link none (0). No readable incident history (5). Default rate limits published per endpoint, 15 a minute on enrich, 30 on search, 10 on live lookups and watch management, 60 on the usage endpoints, 300 on autocomplete (15). 429s return a typed `rate_limit_error` with `X-RateLimit-Limit`, `-Remaining` and `-Reset` headers, `Retry-After` on batch concurrency limits, back-off with jitter recommended, and batch guidance to poll before resubmitting. No idempotency keys, so safe-retry guidance without keys (12). No SLA found, and the published terms cover the website only (0). The API is generally available. Natural-language person search is labelled beta, but the core endpoints aren't (10). 0 + 5 + 15 + 12 + 0 + 10 = 42.", "b": "Hosted lines. Statuspage at status.zerobounce.net with API, API-US, API-EU, Bulk API, website and Cloudflare components (20). The incident feed for 8 August to 6 November shows a 6-minute members platform disruption on 9 September, about 3 minutes of reduced EU API availability on 1 October, and a file upload issue on 26 October resolved within 6 minutes, all minor (20). Limits published per endpoint group with numbers and block lengths (15). 429 is documented with advice to throttle, but no Retry-After, and a block can last an hour or a day (10 of 15). No SLA found (0). Generally available (10). 20+20+15+10+0+10 = 75." }, "scores": { "a": 42, "b": 75 } }, { "by": 30, "category": "payments", "leads": "zerobounce", "name": "Payments \u0026 pricing", "reasons": { "a": "No x402, MPP or L402 (0). Credit costs per endpoint and field are public, but no dollar price per credit is, and enterprise plans start at \"four figures a month\" through sales. We gave 5 rather than 0 because an agent can work out relative cost from the public credit table (5). Every new self-serve account now starts with $20 in free credits, but no page we read says whether signing up needs a card, so the line isn't met on the evidence (0). A person signs up in the dashboard (0).", "b": "No x402, MPP or L402 (0). Per-credit prices public, from $39 for 2,000 validations (20). Freemium of 100 validations a month for business or premium domains; a card requirement isn't stated, and free webmail addresses don't qualify (15 of 20). A person signs up in a browser (0). 0+20+15+0 = 35." }, "scores": { "a": 5, "b": 35 } }, { "by": 13, "category": "maintenance", "leads": "zerobounce", "name": "Maintenance \u0026 community", "reasons": { "a": "The changelog labels every entry by month only, newest \"October 2026\" (NAICS and SIC on company search, `geo_polygon`, research profiles, the Usage API), with no exact dates or feed, and Crustdata publishes no SDK, MCP package or other dated source of its own. Read as the Zoho listings read month-only entries, dated to the month, all of October lies 4 to 34 days back, within 90 days but not shown within 30 (20). Nine entries fall in September and October, months wholly inside the 90 days from 6 August (20). Detailed public changelog, and we didn't test support (12 of 15). The only registry entry found on 1 October sat under a personal GitHub namespace, and we found no official SDKs (0). Versioned specs are current. No packages to judge (5 of 10). 20 + 20 + 12 + 0 + 5 = 57.", "b": "Closed service. The JavaScript SDK 3.0.0 was published on 25 October 2026 (30). No API changelog; the dated changes found in 90 days are that release and status-page notices, fewer than three releases (10 of 20). Support by email and 24/7 chat per the docs, a public status page; replies not tested (10 of 15). Official SDKs in many languages and an MCP server (15). Package health not checked (5 of 10). 30+10+10+15+5 = 70." }, "scores": { "a": 57, "b": 70 } }, { "by": 9, "category": "security", "leads": "zerobounce", "name": "Security \u0026 auth", "reasons": { "a": "Bearer keys, several named keys per account with active, inactive and deleted states, per-key endpoint restrictions and monthly credit caps since July 2026. OAuth for the MCP (28 of 30). Per-key endpoint limits give least privilege. Watchers create standing jobs, and the MCP docs don't separate read and write tools or ask for confirmation (12 of 20). Live web fetch, web search and social posts return untrusted text, and we found no prompt-injection guidance (2 of 15). Usage and logs filterable by key, a usage events API from October 2026, and `X-Credits-Used` on every response (14 of 15). No security.txt, bug bounty, disclosure policy or certification found (0 of 20).", "b": "Several named keys besides a Master key, regeneration, deactivation and IP whitelists (25), less 10 because the documented calls carry the key in the `api_key` query string (15 of 30). Validation only reads, though file and list endpoints can delete uploads (12 of 20). Results are structured status codes with little free text (10 of 15). API usage and dashboard statistics endpoints (10 of 15). SOC 2 Type 2, ISO/IEC 27001:2022, continuous testing with Intigriti and penetration testing with BitSentinel; no public disclosure policy found (18 of 20). 15+12+10+10+18 = 65." }, "scores": { "a": 56, "b": 65 } }, { "by": 7, "category": "transparency", "leads": "zerobounce", "name": "Transparency \u0026 trust", "reasons": { "a": "Closed service. The terms are a website-use notice naming CrustData Inc. (California), while the privacy policy names Crustdata Technologies Inc., and we found no API terms (8 of 30). The privacy policy (updated 19 May 2025) covers people in the datasets, cites consent, contract and legitimate interests, and runs an opt-out portal that removes data within 30 days and blocks it from coming back. Retention has no periods and no DPA is mentioned (15 of 30). Date-pinned versions and migration guides, but breaking changes inside the pinned version with no dated notice (8 of 20). US transfers stated, no subprocessor list (5 of 20).", "b": "Closed service under terms naming Hertza L.L.C. (ZeroBounce) of Nevada; SDKs and MCP server open source (15 of 30). The data protection page says uploaded data is never kept more than 30 days, the privacy policy of 30 June 2026 keeps account data 'as long as needed', and EU and UK DPAs are published (22 of 30). An API migration page, with no dated deprecation policy (6 of 20). A sub-processor list naming each provider and the data exchanged (16 of 20). 15+22+6+16 = 59." }, "scores": { "a": 56, "b": 63 } } ], "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Crustdata", "b": "Hertza L.L.C. (ZeroBounce)", "name": "Vendor" }, { "a": "https://api.crustdata.com", "b": "https://api.zerobounce.net/v2", "name": "Hosted endpoint" }, { "a": "HTTP, Streamable HTTP", "b": "HTTP, stdio", "name": "Transports" }, { "a": "OAuth or key", "b": "API key", "name": "Auth" }, { "a": "Pay per use", "b": "Pay per use", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "none", "b": "Proprietary service under ZeroBounce's terms of use; SDKs and the MCP server are open source", "name": "Licence" }, { "a": "none", "b": "0", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "none", "b": "2026-10-25", "name": "Last release" }, { "a": "no date given", "b": "2026-05-05", "name": "Terms last updated" }, { "a": "2025-05-19", "b": "2026-06-30", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "yes", "name": "Terms or service can change without notice" }, { "a": "not found in the text", "b": "yes", "name": "Arbitration or class-action waiver" }, { "a": "2.5/5 (2)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "ZeroBounce scores 62.4 (B) on agent readiness against Crustdata API + MCP's 52 (D), and leads in 5 of 7 scored categories. Crustdata API + MCP leads on schema \u0026 documentation.", "question": "Which is better for AI agents, Crustdata API + MCP or ZeroBounce?" }, { "answer": "Crustdata API + MCP takes an API key or an OAuth sign-in. ZeroBounce needs an API key.", "question": "Do Crustdata API + MCP and ZeroBounce need an API key?" }, { "answer": "Yes. Crustdata API + MCP has a hosted endpoint at https://api.crustdata.com and ZeroBounce at https://api.zerobounce.net/v2.", "question": "Can an agent call Crustdata API + MCP and ZeroBounce without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Schema \u0026 documentation, 89 against 54" ], "also": null, "goodFor": "Agents that monitor companies, people, jobs or posts over time and need change notifications.", "slug": "crustdata", "watchFor": "No status page and no SLA" }, { "aheadOn": [ "Reliability, 75 against 42", "Security \u0026 auth, 65 against 56", "Payments \u0026 pricing, 35 against 5", "Maintenance \u0026 community, 70 against 57", "Transparency \u0026 trust, 63 against 56" ], "also": [ "Runs on your own machine", "No incidents deducted, where Crustdata API + MCP loses 3 points for them" ], "goodFor": "Email verification before outreach, the verification-first listing in lead-data.", "slug": "zerobounce", "watchFor": "Every documented example sends the key as an `api_key` query parameter" } ], "history": { "crustdata": [ { "causes": [ "correction", "time" ], "date": "2026-11-04", "delta": -1.5, "from": 53.5, "fromGrade": "D", "to": 52, "toGrade": "D" }, { "causes": [ "method" ], "date": "2026-10-28", "delta": 0.1, "from": 53.4, "fromGrade": "D", "to": 53.5, "toGrade": "D" }, { "causes": [ "method" ], "date": "2026-10-08", "delta": -0.1, "from": 53.5, "fromGrade": "D", "to": 53.4, "toGrade": "D" } ], "zerobounce": null }, "job": { "capability": "lead.enrichment", "name": "Lead enrichment" }, "others": [ { "json": "https://www.anchorterminal.com/compare/apollo-vs-crustdata.json", "title": "Apollo API + MCP vs Crustdata API + MCP", "url": "https://www.anchorterminal.com/compare/apollo-vs-crustdata" }, { "json": "https://www.anchorterminal.com/compare/clay-vs-crustdata.json", "title": "Clay vs Crustdata API + MCP", "url": "https://www.anchorterminal.com/compare/clay-vs-crustdata" }, { "json": "https://www.anchorterminal.com/compare/coresignal-vs-crustdata.json", "title": "Coresignal API + MCP vs Crustdata API + MCP", "url": "https://www.anchorterminal.com/compare/coresignal-vs-crustdata" }, { "json": "https://www.anchorterminal.com/compare/crustdata-vs-databar.json", "title": "Crustdata API + MCP vs Databar", "url": "https://www.anchorterminal.com/compare/crustdata-vs-databar" }, { "json": "https://www.anchorterminal.com/compare/crustdata-vs-dievio.json", "title": "Crustdata API + MCP vs Dievio", "url": "https://www.anchorterminal.com/compare/crustdata-vs-dievio" }, { "json": "https://www.anchorterminal.com/compare/crustdata-vs-enrich-layer.json", "title": "Crustdata API + MCP vs Enrich Layer API + MCP", "url": "https://www.anchorterminal.com/compare/crustdata-vs-enrich-layer" }, { "json": "https://www.anchorterminal.com/compare/crustdata-vs-explorium-agentsource.json", "title": "Crustdata API + MCP vs Explorium AgentSource", "url": "https://www.anchorterminal.com/compare/crustdata-vs-explorium-agentsource" }, { "json": "https://www.anchorterminal.com/compare/crustdata-vs-fullenrich.json", "title": "Crustdata API + MCP vs FullEnrich API + MCP", "url": "https://www.anchorterminal.com/compare/crustdata-vs-fullenrich" }, { "json": "https://www.anchorterminal.com/compare/crustdata-vs-fuse-mcp.json", "title": "Crustdata API + MCP vs Fuse MCP", "url": "https://www.anchorterminal.com/compare/crustdata-vs-fuse-mcp" }, { "json": "https://www.anchorterminal.com/compare/crustdata-vs-gojiberry.json", "title": "Crustdata API + MCP vs Gojiberry", "url": "https://www.anchorterminal.com/compare/crustdata-vs-gojiberry" }, { "json": "https://www.anchorterminal.com/compare/crustdata-vs-hunter.json", "title": "Crustdata API + MCP vs Hunter API + MCP", "url": "https://www.anchorterminal.com/compare/crustdata-vs-hunter" }, { "json": "https://www.anchorterminal.com/compare/crustdata-vs-leadmagic.json", "title": "Crustdata API + MCP vs LeadMagic API + MCP", "url": "https://www.anchorterminal.com/compare/crustdata-vs-leadmagic" }, { "json": "https://www.anchorterminal.com/compare/crustdata-vs-lusha.json", "title": "Crustdata API + MCP vs Lusha API + MCP", "url": "https://www.anchorterminal.com/compare/crustdata-vs-lusha" }, { "json": "https://www.anchorterminal.com/compare/crustdata-vs-people-data-labs.json", "title": "Crustdata API + MCP vs People Data Labs", "url": "https://www.anchorterminal.com/compare/crustdata-vs-people-data-labs" }, { "json": "https://www.anchorterminal.com/compare/crustdata-vs-prospeo.json", "title": "Crustdata API + MCP vs Prospeo API + MCP", "url": "https://www.anchorterminal.com/compare/crustdata-vs-prospeo" }, { "json": "https://www.anchorterminal.com/compare/crustdata-vs-rocketreach.json", "title": "Crustdata API + MCP vs RocketReach API", "url": "https://www.anchorterminal.com/compare/crustdata-vs-rocketreach" }, { "json": "https://www.anchorterminal.com/compare/crustdata-vs-zoominfo.json", "title": "Crustdata API + MCP vs ZoomInfo API + MCP", "url": "https://www.anchorterminal.com/compare/crustdata-vs-zoominfo" }, { "json": "https://www.anchorterminal.com/compare/apollo-vs-zerobounce.json", "title": "Apollo API + MCP vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/apollo-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/clay-vs-zerobounce.json", "title": "Clay vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/clay-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/clearbit-vs-crustdata.json", "title": "Clearbit vs Crustdata API + MCP", "url": "https://www.anchorterminal.com/compare/clearbit-vs-crustdata" }, { "json": "https://www.anchorterminal.com/compare/clearbit-vs-zerobounce.json", "title": "Clearbit vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/clearbit-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/coresignal-vs-zerobounce.json", "title": "Coresignal API + MCP vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/coresignal-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/crustdata-vs-dropcontact.json", "title": "Crustdata API + MCP vs Dropcontact API + MCP", "url": "https://www.anchorterminal.com/compare/crustdata-vs-dropcontact" }, { "json": "https://www.anchorterminal.com/compare/crustdata-vs-fullcontact.json", "title": "Crustdata API + MCP vs FullContact", "url": "https://www.anchorterminal.com/compare/crustdata-vs-fullcontact" }, { "json": "https://www.anchorterminal.com/compare/databar-vs-zerobounce.json", "title": "Databar vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/databar-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/dievio-vs-zerobounce.json", "title": "Dievio vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/dievio-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/dropcontact-vs-zerobounce.json", "title": "Dropcontact API + MCP vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/dropcontact-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/enrich-layer-vs-zerobounce.json", "title": "Enrich Layer API + MCP vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/enrich-layer-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/explorium-agentsource-vs-zerobounce.json", "title": "Explorium AgentSource vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/explorium-agentsource-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/fullcontact-vs-zerobounce.json", "title": "FullContact vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/fullcontact-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/fullenrich-vs-zerobounce.json", "title": "FullEnrich API + MCP vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/fullenrich-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/gojiberry-vs-zerobounce.json", "title": "Gojiberry vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/gojiberry-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/lusha-vs-zerobounce.json", "title": "Lusha API + MCP vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/lusha-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/people-data-labs-vs-zerobounce.json", "title": "People Data Labs vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/people-data-labs-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/prospeo-vs-zerobounce.json", "title": "Prospeo API + MCP vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/prospeo-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/zerobounce-vs-zoominfo.json", "title": "ZeroBounce vs ZoomInfo API + MCP", "url": "https://www.anchorterminal.com/compare/zerobounce-vs-zoominfo" }, { "json": "https://www.anchorterminal.com/compare/hunter-vs-zerobounce.json", "title": "Hunter API + MCP vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/hunter-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/fuse-mcp-vs-zerobounce.json", "title": "Fuse MCP vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/fuse-mcp-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/leadmagic-vs-zerobounce.json", "title": "LeadMagic API + MCP vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/leadmagic-vs-zerobounce" }, { "json": "https://www.anchorterminal.com/compare/rocketreach-vs-zerobounce.json", "title": "RocketReach API vs ZeroBounce", "url": "https://www.anchorterminal.com/compare/rocketreach-vs-zerobounce" } ], "panel": null, "scores": [ { "by": 33, "crustdata": 42, "edge": "zerobounce", "key": "reliability", "name": "Reliability", "weight": 16, "zerobounce": 75 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 35, "crustdata": 89, "edge": "crustdata", "key": "schema", "name": "Schema \u0026 documentation", "weight": 13, "zerobounce": 54 }, { "by": 4, "crustdata": 73, "edge": "crustdata", "key": "ergonomics", "name": "Agent ergonomics", "weight": 13, "zerobounce": 69 }, { "by": 9, "crustdata": 56, "edge": "zerobounce", "key": "security", "name": "Security \u0026 auth", "weight": 14, "zerobounce": 65 }, { "by": 30, "crustdata": 5, "edge": "zerobounce", "key": "payments", "name": "Payments \u0026 pricing", "weight": 10, "zerobounce": 35 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 13, "crustdata": 57, "edge": "zerobounce", "key": "maintenance", "name": "Maintenance \u0026 community", "weight": 7, "zerobounce": 70 }, { "by": 7, "crustdata": 56, "edge": "zerobounce", "key": "transparency", "name": "Transparency \u0026 trust", "weight": 7, "zerobounce": 63 } ], "summary": "ZeroBounce scores 62.4 (B) on agent readiness against Crustdata API + MCP's 52 (D), and leads in 5 of 7 scored categories. Crustdata API + MCP leads on schema \u0026 documentation. Both do lead enrichment.", "tasks": null, "tutorials": [], "verdicts": { "crustdata": "Per-field credit prices readable per account, `X-Credits-Used` on every response, per-key caps and $20 in free credits for new self-serve accounts. No status page, no SLA, no dollar price per credit, and changes that refuse earlier valid requests posted only after they shipped.", "zerobounce": "ZeroBounce's v2 API verifies emails with detailed status and sub-status codes, publishes per-endpoint limits, a Statuspage with short incidents only in the last 90 days, SOC 2 Type 2 and ISO 27001, and $0.0195 per email at the smallest pack. The documented key travels in the query string, and there is no OpenAPI contract." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/crustdata-vs-zerobounce", "json": "https://www.anchorterminal.com/compare/crustdata-vs-zerobounce.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/crustdata-vs-zerobounce.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/crustdata-vs-zerobounce.min.md" }, "markdown": "ZeroBounce scores 62.4 (B) on agent readiness against Crustdata API + MCP's 52 (D), and leads in 5 of 7 scored categories. Crustdata API + MCP leads on schema \u0026 documentation. Both do lead enrichment.\n\n- Crustdata API + MCP: grade D, 52/100, rank #997 of 1486. Markdown https://www.anchorterminal.com/tools/crustdata.md · JSON https://www.anchorterminal.com/api/v1/tools/crustdata.json\n- ZeroBounce: grade B, 62.4/100, rank #559 of 1486. Markdown https://www.anchorterminal.com/tools/zerobounce.md · JSON https://www.anchorterminal.com/api/v1/tools/zerobounce.json\n- Best lead, contact and company data APIs for AI agents: https://www.anchorterminal.com/best/lead-data/index.md\n- All 231 leads comparisons: https://www.anchorterminal.com/compare/lead-data/index.md\n\n## Which one, for what\n\n### Crustdata API + MCP (D)\n\nGood for: Agents that monitor companies, people, jobs or posts over time and need change notifications.\n\nAhead on:\n- Schema \u0026 documentation, 89 against 54\n\nWatch for: No status page and no SLA\n\n### ZeroBounce (B)\n\nGood for: Email verification before outreach, the verification-first listing in lead-data.\n\nAhead on:\n- Reliability, 75 against 42\n- Security \u0026 auth, 65 against 56\n- Payments \u0026 pricing, 35 against 5\n- Maintenance \u0026 community, 70 against 57\n- Transparency \u0026 trust, 63 against 56\n\nAlso in its favour:\n- Runs on your own machine\n- No incidents deducted, where Crustdata API + MCP loses 3 points for them\n\nWatch for: Every documented example sends the key as an `api_key` query parameter\n\n\n## Why the edge\n\n### Schema \u0026 documentation: Crustdata API + MCP +35\n\n- Crustdata API + MCP (89): Eight OpenAPI YAML files for version 2025-11-01, one per API group (account, batch, company, job, person, social_post, watch, web) (25). llms.txt with Markdown twins (10). Endpoint pages explain cost and when to search versus enrich (17 of 20). Typed filter trees with documented operators (12 of 15). Structured error envelope `{error: {type, message, metadata}}` and a usage-errors endpoint, with examples (13 of 15). Date-pinned API versions and a detailed changelog. Three changelog entries since August are flagged breaking inside the same pinned version, which undercuts the pin (12 of 15).\n- ZeroBounce (54): No OpenAPI or other machine-readable contract found; a Postman collection is linked (5 of 25). llms.txt lists marketing pages, and the docs have no Markdown twins (5 of 10). Endpoint pages explain timing, credits and when to use batch or file APIs (14 of 20). Parameter tables and listed status and sub-status values, including the ai_agent_mailbox sub-status added in July 2026 (10 of 15). Examples per endpoint, a sandbox and an error-code page (12 of 15). v2 paths, an API migration page and dated maintenance notices on the status page, with no API changelog (8 of 15). 5+5+14+10+12+8 = 54.\n\n### Reliability: ZeroBounce +33\n\n- Crustdata API + MCP (42): No status page found. status.crustdata.com still doesn't answer and the docs link none (0). No readable incident history (5). Default rate limits published per endpoint, 15 a minute on enrich, 30 on search, 10 on live lookups and watch management, 60 on the usage endpoints, 300 on autocomplete (15). 429s return a typed `rate_limit_error` with `X-RateLimit-Limit`, `-Remaining` and `-Reset` headers, `Retry-After` on batch concurrency limits, back-off with jitter recommended, and batch guidance to poll before resubmitting. No idempotency keys, so safe-retry guidance without keys (12). No SLA found, and the published terms cover the website only (0). The API is generally available. Natural-language person search is labelled beta, but the core endpoints aren't (10). 0 + 5 + 15 + 12 + 0 + 10 = 42.\n- ZeroBounce (75): Hosted lines. Statuspage at status.zerobounce.net with API, API-US, API-EU, Bulk API, website and Cloudflare components (20). The incident feed for 8 August to 6 November shows a 6-minute members platform disruption on 9 September, about 3 minutes of reduced EU API availability on 1 October, and a file upload issue on 26 October resolved within 6 minutes, all minor (20). Limits published per endpoint group with numbers and block lengths (15). 429 is documented with advice to throttle, but no Retry-After, and a block can last an hour or a day (10 of 15). No SLA found (0). Generally available (10). 20+20+15+10+0+10 = 75.\n\n### Payments \u0026 pricing: ZeroBounce +30\n\n- Crustdata API + MCP (5): No x402, MPP or L402 (0). Credit costs per endpoint and field are public, but no dollar price per credit is, and enterprise plans start at \"four figures a month\" through sales. We gave 5 rather than 0 because an agent can work out relative cost from the public credit table (5). Every new self-serve account now starts with $20 in free credits, but no page we read says whether signing up needs a card, so the line isn't met on the evidence (0). A person signs up in the dashboard (0).\n- ZeroBounce (35): No x402, MPP or L402 (0). Per-credit prices public, from $39 for 2,000 validations (20). Freemium of 100 validations a month for business or premium domains; a card requirement isn't stated, and free webmail addresses don't qualify (15 of 20). A person signs up in a browser (0). 0+20+15+0 = 35.\n\n### Maintenance \u0026 community: ZeroBounce +13\n\n- Crustdata API + MCP (57): The changelog labels every entry by month only, newest \"October 2026\" (NAICS and SIC on company search, `geo_polygon`, research profiles, the Usage API), with no exact dates or feed, and Crustdata publishes no SDK, MCP package or other dated source of its own. Read as the Zoho listings read month-only entries, dated to the month, all of October lies 4 to 34 days back, within 90 days but not shown within 30 (20). Nine entries fall in September and October, months wholly inside the 90 days from 6 August (20). Detailed public changelog, and we didn't test support (12 of 15). The only registry entry found on 1 October sat under a personal GitHub namespace, and we found no official SDKs (0). Versioned specs are current. No packages to judge (5 of 10). 20 + 20 + 12 + 0 + 5 = 57.\n- ZeroBounce (70): Closed service. The JavaScript SDK 3.0.0 was published on 25 October 2026 (30). No API changelog; the dated changes found in 90 days are that release and status-page notices, fewer than three releases (10 of 20). Support by email and 24/7 chat per the docs, a public status page; replies not tested (10 of 15). Official SDKs in many languages and an MCP server (15). Package health not checked (5 of 10). 30+10+10+15+5 = 70.\n\n### Security \u0026 auth: ZeroBounce +9\n\n- Crustdata API + MCP (56): Bearer keys, several named keys per account with active, inactive and deleted states, per-key endpoint restrictions and monthly credit caps since July 2026. OAuth for the MCP (28 of 30). Per-key endpoint limits give least privilege. Watchers create standing jobs, and the MCP docs don't separate read and write tools or ask for confirmation (12 of 20). Live web fetch, web search and social posts return untrusted text, and we found no prompt-injection guidance (2 of 15). Usage and logs filterable by key, a usage events API from October 2026, and `X-Credits-Used` on every response (14 of 15). No security.txt, bug bounty, disclosure policy or certification found (0 of 20).\n- ZeroBounce (65): Several named keys besides a Master key, regeneration, deactivation and IP whitelists (25), less 10 because the documented calls carry the key in the `api_key` query string (15 of 30). Validation only reads, though file and list endpoints can delete uploads (12 of 20). Results are structured status codes with little free text (10 of 15). API usage and dashboard statistics endpoints (10 of 15). SOC 2 Type 2, ISO/IEC 27001:2022, continuous testing with Intigriti and penetration testing with BitSentinel; no public disclosure policy found (18 of 20). 15+12+10+10+18 = 65.\n\n### Transparency \u0026 trust: ZeroBounce +7\n\n- Crustdata API + MCP (56): Closed service. The terms are a website-use notice naming CrustData Inc. (California), while the privacy policy names Crustdata Technologies Inc., and we found no API terms (8 of 30). The privacy policy (updated 19 May 2025) covers people in the datasets, cites consent, contract and legitimate interests, and runs an opt-out portal that removes data within 30 days and blocks it from coming back. Retention has no periods and no DPA is mentioned (15 of 30). Date-pinned versions and migration guides, but breaking changes inside the pinned version with no dated notice (8 of 20). US transfers stated, no subprocessor list (5 of 20).\n- ZeroBounce (63): Closed service under terms naming Hertza L.L.C. (ZeroBounce) of Nevada; SDKs and MCP server open source (15 of 30). The data protection page says uploaded data is never kept more than 30 days, the privacy policy of 30 June 2026 keeps account data 'as long as needed', and EU and UK DPAs are published (22 of 30). An API migration page, with no dated deprecation policy (6 of 20). A sub-processor list naming each provider and the data exchanged (16 of 20). 15+22+6+16 = 59.\n\n## Score by category\n\n| Category | Weight | Crustdata API + MCP | ZeroBounce | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 42 | 75 | ZeroBounce +33 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 89 | 54 | Crustdata API + MCP +35 |\n| Agent ergonomics | 13% (16.2 this run) | 73 | 69 | Crustdata API + MCP +4 |\n| Security \u0026 auth | 14% (17.5 this run) | 56 | 65 | ZeroBounce +9 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 5 | 35 | ZeroBounce +30 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 57 | 70 | ZeroBounce +13 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 56 | 63 | ZeroBounce +7 |\n| Negative events | ≤15 | -3 | 0 | |\n| **Total** | | **52 · D** | **62.4 · B** | |\n\n## Facts side by side\n\n| Fact | Crustdata API + MCP | ZeroBounce |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Crustdata | Hertza L.L.C. (ZeroBounce) |\n| Hosted endpoint | `https://api.crustdata.com` | `https://api.zerobounce.net/v2` |\n| Transports | HTTP, Streamable HTTP | HTTP, stdio |\n| Auth | OAuth or key | API key |\n| Pricing | Pay per use | Pay per use |\n| x402 | no | no |\n| Licence | none | Proprietary service under ZeroBounce's terms of use; SDKs and the MCP server are open source |\n| Tools exposed | none | 0 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | none | 2026-10-25 |\n| Terms last updated | no date given | 2026-05-05 |\n| Privacy policy last updated | 2025-05-19 | 2026-06-30 |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | not found in the text | not found in the text |\n| Terms restrict benchmarking | not found in the text | not found in the text |\n| Terms or service can change without notice | not found in the text | yes |\n| Arbitration or class-action waiver | not found in the text | yes |\n| Agent reviews | 2.5/5 (2) | none |\n\n## How the scores have moved\n\n### Crustdata API + MCP\n\n- -1.5 on 4 November 2026: correction, time\n- +0.1 on 28 October 2026: checklist\n- -0.1 on 8 October 2026: checklist\n\n### ZeroBounce\n\nNo score change since it was listed.\n\n## Verdicts\n\n**Crustdata API + MCP.** Per-field credit prices readable per account, `X-Credits-Used` on every response, per-key caps and $20 in free credits for new self-serve accounts. No status page, no SLA, no dollar price per credit, and changes that refuse earlier valid requests posted only after they shipped.\n\n**ZeroBounce.** ZeroBounce's v2 API verifies emails with detailed status and sub-status codes, publishes per-endpoint limits, a Statuspage with short incidents only in the last 90 days, SOC 2 Type 2 and ISO 27001, and $0.0195 per email at the smallest pack. The documented key travels in the query string, and there is no OpenAPI contract.\n\n## Before you call either\n\n### Crustdata API + MCP\n\n1. Always send `x-api-version: 2025-11-01`. Unpinned calls get the latest version\n2. Call `/account/endpoints` first to see what your plan enables and what each field costs\n3. Ask only for the premium field groups you need, since each one bills\n4. Poll `GET /batch/{id}` before submitting more batch jobs. Active jobs count against a cap of 5 to 30\n5. Read the `crustdata://catalog` resource before calling MCP tools\n\n### ZeroBounce\n\n1. Use the regional host (api-us or api-eu) that matches the data, and test with the sandbox addresses, which spend no credits\n2. Set `timeout` (3 to 60 seconds); slow mail servers return unknown, which is free to retry later\n3. Stay under 80,000 validations per 10 seconds and avoid repeated bad requests, which block the key for an hour\n4. Use the bulk file API for large lists instead of looping on /v2/validate\n5. Keep the key out of logs; the API takes it only as `api_key` in the URL\n\n## Questions\n\n### Which is better for AI agents, Crustdata API + MCP or ZeroBounce?\n\nZeroBounce scores 62.4 (B) on agent readiness against Crustdata API + MCP's 52 (D), and leads in 5 of 7 scored categories. Crustdata API + MCP leads on schema \u0026 documentation.\n\n### Do Crustdata API + MCP and ZeroBounce need an API key?\n\nCrustdata API + MCP takes an API key or an OAuth sign-in. ZeroBounce needs an API key.\n\n### Can an agent call Crustdata API + MCP and ZeroBounce without installing anything?\n\nYes. Crustdata API + MCP has a hosted endpoint at https://api.crustdata.com and ZeroBounce at https://api.zerobounce.net/v2.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/crustdata-vs-zerobounce.json, and with the fewest tokens: https://www.anchorterminal.com/compare/crustdata-vs-zerobounce.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"crustdata\", \"b\": \"zerobounce\"}`. From a terminal: `anchor compare crustdata zerobounce`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/crustdata.json and https://www.anchorterminal.com/api/v1/tools/zerobounce.json\n\n## Other comparisons with Crustdata API + MCP or ZeroBounce\n\n- [Apollo API + MCP vs Crustdata API + MCP](https://www.anchorterminal.com/compare/apollo-vs-crustdata.md)\n- [Clay vs Crustdata API + MCP](https://www.anchorterminal.com/compare/clay-vs-crustdata.md)\n- [Coresignal API + MCP vs Crustdata API + MCP](https://www.anchorterminal.com/compare/coresignal-vs-crustdata.md)\n- [Crustdata API + MCP vs Databar](https://www.anchorterminal.com/compare/crustdata-vs-databar.md)\n- [Crustdata API + MCP vs Dievio](https://www.anchorterminal.com/compare/crustdata-vs-dievio.md)\n- [Crustdata API + MCP vs Enrich Layer API + MCP](https://www.anchorterminal.com/compare/crustdata-vs-enrich-layer.md)\n- [Crustdata API + MCP vs Explorium AgentSource](https://www.anchorterminal.com/compare/crustdata-vs-explorium-agentsource.md)\n- [Crustdata API + MCP vs FullEnrich API + MCP](https://www.anchorterminal.com/compare/crustdata-vs-fullenrich.md)\n- [Crustdata API + MCP vs Fuse MCP](https://www.anchorterminal.com/compare/crustdata-vs-fuse-mcp.md)\n- [Crustdata API + MCP vs Gojiberry](https://www.anchorterminal.com/compare/crustdata-vs-gojiberry.md)\n- [Crustdata API + MCP vs Hunter API + MCP](https://www.anchorterminal.com/compare/crustdata-vs-hunter.md)\n- [Crustdata API + MCP vs LeadMagic API + MCP](https://www.anchorterminal.com/compare/crustdata-vs-leadmagic.md)\n- [Crustdata API + MCP vs Lusha API + MCP](https://www.anchorterminal.com/compare/crustdata-vs-lusha.md)\n- [Crustdata API + MCP vs People Data Labs](https://www.anchorterminal.com/compare/crustdata-vs-people-data-labs.md)\n- [Crustdata API + MCP vs Prospeo API + MCP](https://www.anchorterminal.com/compare/crustdata-vs-prospeo.md)\n- [Crustdata API + MCP vs RocketReach API](https://www.anchorterminal.com/compare/crustdata-vs-rocketreach.md)\n- [Crustdata API + MCP vs ZoomInfo API + MCP](https://www.anchorterminal.com/compare/crustdata-vs-zoominfo.md)\n- [Apollo API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/apollo-vs-zerobounce.md)\n- [Clay vs ZeroBounce](https://www.anchorterminal.com/compare/clay-vs-zerobounce.md)\n- [Clearbit vs Crustdata API + MCP](https://www.anchorterminal.com/compare/clearbit-vs-crustdata.md)\n- [Clearbit vs ZeroBounce](https://www.anchorterminal.com/compare/clearbit-vs-zerobounce.md)\n- [Coresignal API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/coresignal-vs-zerobounce.md)\n- [Crustdata API + MCP vs Dropcontact API + MCP](https://www.anchorterminal.com/compare/crustdata-vs-dropcontact.md)\n- [Crustdata API + MCP vs FullContact](https://www.anchorterminal.com/compare/crustdata-vs-fullcontact.md)\n- [Databar vs ZeroBounce](https://www.anchorterminal.com/compare/databar-vs-zerobounce.md)\n- [Dievio vs ZeroBounce](https://www.anchorterminal.com/compare/dievio-vs-zerobounce.md)\n- [Dropcontact API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/dropcontact-vs-zerobounce.md)\n- [Enrich Layer API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/enrich-layer-vs-zerobounce.md)\n- [Explorium AgentSource vs ZeroBounce](https://www.anchorterminal.com/compare/explorium-agentsource-vs-zerobounce.md)\n- [FullContact vs ZeroBounce](https://www.anchorterminal.com/compare/fullcontact-vs-zerobounce.md)\n- [FullEnrich API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/fullenrich-vs-zerobounce.md)\n- [Gojiberry vs ZeroBounce](https://www.anchorterminal.com/compare/gojiberry-vs-zerobounce.md)\n- [Lusha API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/lusha-vs-zerobounce.md)\n- [People Data Labs vs ZeroBounce](https://www.anchorterminal.com/compare/people-data-labs-vs-zerobounce.md)\n- [Prospeo API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/prospeo-vs-zerobounce.md)\n- [ZeroBounce vs ZoomInfo API + MCP](https://www.anchorterminal.com/compare/zerobounce-vs-zoominfo.md)\n- [Hunter API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/hunter-vs-zerobounce.md)\n- [Fuse MCP vs ZeroBounce](https://www.anchorterminal.com/compare/fuse-mcp-vs-zerobounce.md)\n- [LeadMagic API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/leadmagic-vs-zerobounce.md)\n- [RocketReach API vs ZeroBounce](https://www.anchorterminal.com/compare/rocketreach-vs-zerobounce.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/", 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