{ "data": { "a": { "slug": "sendblue", "name": "Sendblue", "vendor": "Round One, Inc.", "vendorUrl": "https://www.sendblue.com", "kind": "http-api", "category": "messaging", "summary": "Sendblue is a hosted API from Round One, Inc. for sending and receiving iMessage, RCS, SMS and MMS from dedicated or shared phone numbers. Agents use a REST API, TypeScript and Python SDKs, a CLI and an MCP server.", "url": "https://www.anchorterminal.com/tools/sendblue", "markdownUrl": "https://www.anchorterminal.com/tools/sendblue.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/sendblue.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/sendblue.json", "repo": "https://github.com/sendblue-api/sendblue-ts", "license": "Proprietary service under Round One, Inc.'s terms of service. The TypeScript and Python SDKs and the MCP server are Apache-2.0, and the CLI is MIT", "transports": [ "http", "stdio" ], "remoteUrl": "https://api.sendblue.com", "packages": [ { "registry": "npm", "name": "sendblue" }, { "registry": "pypi", "name": "sendblue" }, { "registry": "npm", "name": "sendblue-api-mcp" }, { "registry": "npm", "name": "@sendblue/cli" } ], "auth": "api-key", "authNotes": "Every request carries the account's key pair in the `sb-api-key-id` and `sb-api-secret-key` headers, and requests from a browser are refused. The keys come from the dashboard or from `sendblue show-keys` after the CLI creates the account, which needs a person to text a one-time code or enter an email code. `POST /v3/auth/tokens` mints a temporary bearer token, account-wide or limited to named phone numbers, valid for 900 seconds by default and revocable. The MCP server reads `SENDBLUE_API_API_KEY` and `SENDBLUE_API_API_SECRET` from the environment. Agency subaccounts with their own keys need approval from support.", "pricing": "freemium", "pricingNotes": "Flat price per line with no per-message fee. The Free Sandbox is $0 with no card, on a shared number with up to 10 verified contacts. The AI Agent plan is $100 a month per dedicated line and is inbound-first. Proactive outbound messaging is on the Enterprise or Blue Ocean plan, priced through sales. The terms add 3 per cent for card payments and $60 per line to port a number out (https://www.sendblue.com/pricing, checked 2026-10-08).", "priceSummary": "$100 / mo", "where": "both", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs, either `llms.txt`, the pricing page or the terms (checked 2026-10-08).", "endpoints": [] }, "toolCount": 18, "popularity": { "githubStars": null, "npmWeekly": 249505, "pypiWeekly": 39912, "asOf": "2026-10-08" }, "docsUrl": "https://docs.sendblue.com", "llmsTxt": "https://docs.sendblue.com/llms.txt", "capabilities": [ "messaging.sms", "messaging.mms", "messaging.rcs", "messaging.inbound", "messaging.verify" ], "tags": [ "hosted", "imessage", "sms", "rcs", "mcp", "cli", "llms-txt", "typescript", "python", "webhooks", "no-card", "status-page" ], "lastRelease": "2026-10-07", "graded": true, "anchor": { "graded": true, "score": 61.7, "grade": "C", "agentReady": false, "rank": 358, "ranked": true, "rankOf": 722, "categoryRank": 9, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 76, "maintenance": 72, "payments": 40, "reliability": 71, "schema": 66, "security": 46, "transparency": 58 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "Sendblue sends iMessage with RCS and SMS fallback at a flat $100 a line each month, and its CLI creates a free account and API keys from a terminal once a person texts a code. Proactive outbound messaging is sold through sales, no OpenAPI file is published, and the MCP package the docs install dates from August 2025.", "bestFor": "An agent that answers people over iMessage on a US number, where blue-bubble threads, typing indicators and reactions matter and the person texts first.", "strengths": [ "One request to `/api/send-message` sends iMessage and can fall back to RCS or SMS, with no per-message fee on any plan", "The CLI creates a free account, a shared line and API keys from a terminal, with no card, once a person texts a one-time code", "Temporary bearer tokens from `/v3/auth/tokens` can be limited to named phone numbers, expire after 900 seconds by default and can be revoked", "Every docs page has a Markdown twin at `/index.md`, and `llms.txt` summarises each page with its limits and conditions", "Rate limits are published with numbers for each plan, and declined sends return an `error_key` an agent can branch on" ], "weaknesses": [ "Proactive outbound messaging needs the Blue Ocean plan, which has no public price. The $100 AI Agent plan is inbound-first", "No OpenAPI file was found at any public address, although the SDKs and the reference are generated from one", "The docs install `sendblue-api-mcp`, last published on 5 August 2025 with 18 tools. The API now has 54 configured endpoints", "`/api/send-message` takes no idempotency key, and the SDKs retry 429 and 5xx responses twice by default", "No public DPA, sub-processor list, retention period, deprecation policy or security.txt was found" ], "agentNotes": [ "Send `from_number` on every request. Read the account's numbers from `GET /api/lines` first, because a send without it fails", "On the free plan a recipient must text the Sendblue number once before any message to them is accepted", "Before a contact's first reply keep messages under 300 characters with no links, media, phone numbers or email addresses, and stop at six", "Branch on `error_key` in an HTTP 400 decline and don't retry it. Only HTTP 429 clears by waiting", "Set `maxRetries: 0` on sends where a duplicate matters, and treat `504 outcome_unknown` on group changes as possibly applied", "Mint a token at `/v3/auth/tokens` limited to one phone number for a sub-agent, and keep the account key pair out of its context" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 61.7 } ], "editorialScores": { "ergonomics": 76, "maintenance": 72, "payments": 40, "reliability": 71, "schema": 66, "security": 46, "transparency": 29 }, "provenanceScore": 86 }, "connect": { "install": "npm install sendblue", "http": "curl -X POST https://api.sendblue.com/api/send-message \\\n -H \"sb-api-key-id: $SENDBLUE_API_KEY_ID\" -H \"sb-api-secret-key: $SENDBLUE_API_KEY_SECRET\" \\\n -H \"Content-Type: application/json\" \\\n -d '{\"number\":\"+19998887777\",\"from_number\":\"+18887776666\",\"content\":\"Hello from Sendblue!\"}'", "claudeCode": "claude mcp add sendblue_api --env SENDBLUE_API_API_KEY=your-api-key --env SENDBLUE_API_API_SECRET=your-api-secret -- npx -y sendblue-api-mcp --client=claude-code --tools=all", "config": { "mcpServers": { "sendblue_api": { "args": [ "-y", "sendblue-api-mcp", "--tools=all" ], "command": "npx", "env": { "SENDBLUE_API_API_KEY": "your-api-key", "SENDBLUE_API_API_SECRET": "your-api-secret" } } } } }, "letme": { "capability": "https://letme.dev/messaging.sms", "tool": "https://letme.dev/sendblue" }, "area": "communication", "unitPrices": [ { "item": "AI Agent plan, dedicated line", "unit": "month", "usd": 100, "note": "Per line, inbound-first, no per-message fee. Outbound plans are priced through sales" } ], "provenance": { "legalEntity": "Round One, Inc.", "domain": "sendblue.com", "domainRegistered": "2011-06-25", "endpointOnVendorDomain": true, "terms": "https://www.sendblue.com/terms-of-service", "privacy": "https://www.sendblue.com/privacy-policy", "statusPage": "https://status.sendblue.com", "changelog": "https://github.com/sendblue-api/sendblue-ts/blob/main/CHANGELOG.md", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The terms of service (effective 19 March 2025) and the privacy policy (effective 1 May 2024) both name Round One, Inc. as Sendblue. The site footer gives 344 West End Avenue, New York NY 10024.", "The terms cover registering for and using the services, so they govern API use. The privacy policy covers the website and the services and says Sendblue is a processor for its business customers.", "The API answers at api.sendblue.com, and the SDKs default to api.sendblue.co, a second domain the vendor uses.", "`/.well-known/security.txt` returns 404 on www.sendblue.com, docs.sendblue.com and api.sendblue.com.", "There is no API changelog in the docs. The changelog link is the TypeScript SDK's, whose recent entries mostly read as regenerated clients.", "RDAP for sendblue.com gives a registration date of 2011-06-25." ], "score": 86 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/sendblue.json", "live": { "slug": "sendblue", "probe": { "target": "https://api.sendblue.com", "method": "get", "lastAt": "2026-10-08T22:39:58.307728632Z", "lastOk": true, "lastStatus": 200, "lastMs": 742, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 755, "p95ms24h": 921, "samples24h": 36, "samples30d": 36, "days": [ { "date": "2026-10-08", "probes": 36, "ok": 36 } ] }, "vendorStatus": { "page": "https://status.sendblue.com", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-08T19:39:09.808226694Z" }, "updatedAt": "2026-10-08T22:39:58.307728632Z" } }, "answer": "Telnyx API + MCP scores 73.6 (BB) on agent readiness against Sendblue's 61.7 (C), and leads in 6 of 7 scored categories.", "b": { "slug": "telnyx", "name": "Telnyx API + MCP", "vendor": "Telnyx", "vendorUrl": "https://telnyx.com", "kind": "http-api", "category": "messaging", "summary": "Carrier-owned CPaaS with SMS, MMS, RCS and WhatsApp on one REST API, plus an official hosted MCP server at api.telnyx.com/v2/mcp and a stdio MCP package.", "url": "https://www.anchorterminal.com/tools/telnyx", "markdownUrl": "https://www.anchorterminal.com/tools/telnyx.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/telnyx.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/telnyx.json", "repo": "https://github.com/team-telnyx/telnyx-node", "license": "MIT", "transports": [ "http", "streamable-http", "stdio" ], "remoteUrl": "https://api.telnyx.com/v2", "packages": [ { "registry": "npm", "name": "telnyx" }, { "registry": "npm", "name": "telnyx-mcp" }, { "registry": "pypi", "name": "telnyx" } ], "auth": "api-key", "authNotes": "Bearer API key from the portal for both the REST API and the hosted MCP endpoint. Claude custom connectors can instead grant access through the Telnyx portal. Webhooks are signed.", "pricing": "usage", "pricingNotes": "Pay as you go with no minimum and no free credit. Fund by card, or by x402 (USDC on Base), MPP or ACP top-ups through the API. US SMS per part, outbound or inbound, $0.004 on long code, $0.0055 on toll-free and $0.007 on short code, plus carrier passthrough fees ($0.0035 AT\u0026T, $0.0045 Verizon and T-Mobile). US MMS $0.015 a part outbound and $0.005 inbound on long code. Numbers $1 a month. WhatsApp adds a $0.004 platform fee a message on top of Meta's rate card. 10DLC brand registration $4.50 and campaign $10 a month. Committed plans start at $500 a month (https://telnyx.com/pricing/messaging, https://telnyx.com/agent-signup.md).", "priceSummary": "Pay per use", "where": "both", "x402": { "level": "partial", "evidence": "Telnyx's agent signup guide documents POST https://api.telnyx.com/v2/x402/credit_account to top up account credit in USDC on Base, alongside MPP at /v2/machine-payments/account-credit and ACP checkout sessions. These are account top-ups, not per-message payments on the messaging endpoints, and per-payment limits aren't published. Not tested by us (https://telnyx.com/agent-signup.md, checked 2026-10-01).", "endpoints": [ { "url": "https://api.telnyx.com/v2/x402/credit_account", "priceUsd": null, "network": "eip155:8453" } ] }, "toolCount": 3, "popularity": { "githubStars": 197, "npmWeekly": 416629, "pypiWeekly": 178817, "asOf": "2026-09-30" }, "docsUrl": "https://developers.telnyx.com", "llmsTxt": "https://developers.telnyx.com/llms.txt", "openapi": "https://raw.githubusercontent.com/team-telnyx/openapi/master/openapi/spec3.json", "registryName": "io.github.team-telnyx/telnyx", "capabilities": [ "messaging.sms", "messaging.mms", "messaging.rcs", "messaging.whatsapp", "messaging.voice", "messaging.verify", "messaging.inbound" ], "tags": [ "hosted", "mcp", "llms-txt", "openapi", "typescript", "python", "webhooks", "sms", "whatsapp", "x402", "stablecoin", "prepaid" ], "lastRelease": "2026-09-25", "graded": true, "anchor": { "graded": true, "score": 73.6, "grade": "BB", "agentReady": true, "rank": 76, "ranked": true, "rankOf": 722, "categoryRank": 4, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 80, "maintenance": 83, "payments": 65, "reliability": 80, "schema": 93, "security": 45, "transparency": 71 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "US long code SMS $0.004 a part outbound and inbound, published with carrier fees and as machine-readable pricing.md. No per-key scopes or read-only keys, and the MCP can send or buy numbers without confirmation.", "bestFor": "Cost-sensitive US SMS and for agents that must onboard and pay without a person.", "strengths": [ "US long code SMS $0.004 a part outbound and inbound, published with carrier fees and as machine-readable pricing.md", "Agent signup and x402 or MPP top-ups with no browser", "429 responses carry Retry-After and x-ratelimit headers, with documented backoff guidance", "Hosted MCP with 3 meta-tools that load endpoint schemas on demand", "19 telnyx-node releases in 90 days, the latest v7.24.0 on 2026-09-25" ], "weaknesses": [ "No per-key scopes or read-only keys, and the MCP can send or buy numbers without confirmation", "No free credit, a new account starts at zero", "API-wide 5XX errors for about 2 hours on 2026-09-23, plus messaging latency and delivery incidents through September", "x402 and MPP only top up account credit, they don't pay per message", "No security.txt or bug bounty found" ], "agentNotes": [ "Register the 10DLC brand ($4.50) and campaign ($10 a month) before sending US long code traffic", "Back off on error 10011 for as long as the Retry-After header says", "Call get_api_endpoint_schema before invoke_api_endpoint, the schemas aren't in the tool list", "Give each agent its own key, since keys can't be scoped", "Verify the signature on inbound message webhooks before acting on the text" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "BB", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 73.6 } ], "editorialScores": { "ergonomics": 80, "maintenance": 83, "payments": 65, "reliability": 80, "schema": 93, "security": 45, "transparency": 55 }, "provenanceScore": 87 }, "connect": { "http": "curl -X POST https://api.telnyx.com/v2/messages -H \"Authorization: Bearer $TELNYX_API_KEY\" \\\n -H \"Content-Type: application/json\" -d '{\"from\":\"+15551234567\",\"to\":\"+15559876543\",\"text\":\"Hello from Telnyx\"}'", "claudeCode": "claude mcp add --transport http telnyx https://api.telnyx.com/v2/mcp --header \"Authorization: Bearer $TELNYX_API_KEY\"", "config": { "mcpServers": { "telnyx": { "args": [ "-y", "telnyx-mcp" ], "command": "npx", "env": { "TELNYX_API_KEY": "${TELNYX_API_KEY}" } } } } }, "letme": { "capability": "https://letme.dev/messaging.sms", "tool": "https://letme.dev/telnyx" }, "sameCompany": [ "telnyx-voice" ], "area": "communication", "unitPrices": [ { "item": "SMS outbound, US long code", "unit": "message", "usd": 0.004, "note": "US, per part, carrier fees extra, tiered down at 100M parts" }, { "item": "SMS outbound, UK", "unit": "message", "usd": 0.05, "note": "UK, per part" }, { "item": "MMS outbound, US long code", "unit": "message", "usd": 0.015, "note": "US, per part, carrier fees extra" }, { "item": "WhatsApp platform fee", "unit": "message", "usd": 0.004, "note": "on top of Meta's per-message rate" } ], "provenance": { "legalEntity": "Telnyx LLC", "domain": "telnyx.com", "domainRegistered": "2009-05-04", "endpointOnVendorDomain": true, "terms": "https://telnyx.com/terms-and-conditions-of-service", "privacy": "https://telnyx.com/privacy-policy", "statusPage": "https://status.telnyx.com", "changelog": "https://telnyx.com/release-notes", "securityTxt": "none", "checked": "2026-09-30", "score": 87 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/telnyx.json", "live": { "slug": "telnyx", "probe": { "target": "https://api.telnyx.com/v2", "method": "get", "lastAt": "2026-10-08T22:40:00.884520567Z", "lastOk": true, "lastStatus": 404, "lastMs": 99, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 108, "p95ms24h": 163, "samples24h": 269, "samples30d": 2172, "days": [ { "date": "2026-09-30", "probes": 35, "ok": 35 }, { "date": "2026-10-01", "probes": 276, "ok": 276 }, { "date": "2026-10-02", "probes": 248, "ok": 248 }, { "date": "2026-10-03", "probes": 271, "ok": 271 }, { "date": "2026-10-04", "probes": 272, "ok": 272 }, { "date": "2026-10-05", "probes": 272, "ok": 272 }, { "date": "2026-10-06", "probes": 272, "ok": 272 }, { "date": "2026-10-07", "probes": 272, "ok": 272 }, { "date": "2026-10-08", "probes": 254, "ok": 254 } ] }, "vendorStatus": { "page": "https://status.telnyx.com", "indicator": "maintenance", "summary": "Under Maintenance", "checkedAt": "2026-10-08T22:39:42.954065445Z" }, "versions": [ { "registry": "github", "name": "team-telnyx/telnyx-node", "version": "v7.25.0", "released": "2026-10-06", "seenAt": "2026-10-08T16:31:45.759431571Z" }, { "registry": "mcp-registry", "name": "io.github.team-telnyx/telnyx", "version": "6.29.3", "seenAt": "2026-10-08T02:42:52.272076636Z" }, { "registry": "npm", "name": "telnyx", "version": "7.25.0", "seenAt": "2026-10-08T16:31:43.617853739Z" }, { "registry": "npm", "name": "telnyx-mcp", "version": "7.25.0", "seenAt": "2026-10-08T16:31:43.679534048Z" }, { "registry": "pypi", "name": "telnyx", "version": "4.184.0", "released": "2026-10-07", "seenAt": "2026-10-08T16:31:45.642105522Z" } ], "githubStars": 197, "npmWeekly": 487202, "pypiWeekly": 211921, "securityTxt": { "url": "https://telnyx.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-08T15:39:09.162828278Z" }, "llmsTxt": { "url": "https://developers.telnyx.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-08T14:00:58.450746322Z" }, "domain": { "domain": "telnyx.com", "registered": "2009-05-04", "source": "https://rdap.verisign.com/com/v1/domain/telnyx.com", "checkedAt": "2026-10-04T13:09:33.721251862Z" }, "pages": [ { "url": "https://telnyx.com/pricing/messaging", "kind": "pricing", "status": 200, "checkedAt": "2026-10-08T18:25:10.028419665Z", "changedAt": "2026-10-08T18:25:10.028419665Z", "fingerprint": "901908e4ff6f" } ], "updatedAt": "2026-10-08T22:40:00.884520567Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Round One, Inc.", "b": "Telnyx", "name": "Vendor" }, { "a": "https://api.sendblue.com", "b": "https://api.telnyx.com/v2", "name": "Hosted endpoint" }, { "a": "HTTP, stdio", "b": "HTTP, Streamable HTTP, stdio", "name": "Transports" }, { "a": "API key", "b": "API key", "name": "Auth" }, { "a": "Freemium", "b": "Pay per use", "name": "Pricing" }, { "a": "not published", "b": "$0.004 per message", "name": "Price for messaging sms" }, { "a": "no", "b": "payer tooling only", "name": "x402" }, { "a": "Proprietary service under Round One, Inc.'s terms of service. The TypeScript and Python SDKs and the MCP server are Apache-2.0, and the CLI is MIT", "b": "MIT", "name": "Licence" }, { "a": "18", "b": "3", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "not listed", "b": "io.github.team-telnyx/telnyx", "name": "MCP registry" }, { "a": "2026-10-07", "b": "2026-09-25", "name": "Last release" }, { "a": "2025-03-19", "b": "no date given", "name": "Terms last updated" }, { "a": "2024-05-01", "b": "2026-03-01", "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": "not found in the text", "name": "Terms or service can change without notice" }, { "a": "yes", "b": "yes", "name": "Arbitration or class-action waiver" }, { "a": "250k npm/wk, 40k PyPI/wk", "b": "197 stars, 417k npm/wk, 179k PyPI/wk", "name": "Popularity" }, { "a": "none", "b": "3.5/5 (2)", "name": "Agent reviews" } ], "faq": [ { "answer": "Telnyx API + MCP scores 73.6 (BB) on agent readiness against Sendblue's 61.7 (C), and leads in 6 of 7 scored categories.", "question": "Which is better for AI agents, Sendblue or Telnyx API + MCP?" }, { "answer": "Both need an API key.", "question": "Do Sendblue and Telnyx API + MCP need an API key?" }, { "answer": "Yes. Sendblue has a hosted endpoint at https://api.sendblue.com and Telnyx API + MCP at https://api.telnyx.com/v2.", "question": "Can an agent call Sendblue and Telnyx API + MCP without installing anything?" } ], "goodFor": [ { "aheadOn": null, "also": [ "Free to start without a card" ], "goodFor": "An agent that answers people over iMessage on a US number, where blue-bubble threads, typing indicators and reactions matter and the person texts first.", "slug": "sendblue", "watchFor": "Proactive outbound messaging needs the Blue Ocean plan, which has no public price. The $100 AI Agent plan is inbound-first" }, { "aheadOn": [ "Reliability, 80 against 71", "Schema \u0026 documentation, 93 against 66", "Payments \u0026 pricing, 65 against 40", "Maintenance \u0026 community, 83 against 72", "Transparency \u0026 trust, 71 against 58" ], "also": [ "Agent-ready, a grade of BB or better" ], "goodFor": "Cost-sensitive US SMS and for agents that must onboard and pay without a person.", "slug": "telnyx", "watchFor": "No per-key scopes or read-only keys, and the MCP can send or buy numbers without confirmation" } ], "job": { "capability": "messaging.sms", "name": "Messaging sms" }, "others": [ { "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-sendblue.json", "title": "AWS End User Messaging vs Sendblue", "url": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-sendblue" }, { "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-telnyx.json", "title": "AWS End User Messaging vs Telnyx API + MCP", "url": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-telnyx" }, { "json": "https://www.anchorterminal.com/compare/bandwidth-vs-sendblue.json", "title": "Bandwidth Messaging API + MCP vs Sendblue", "url": "https://www.anchorterminal.com/compare/bandwidth-vs-sendblue" }, { "json": "https://www.anchorterminal.com/compare/bandwidth-vs-telnyx.json", "title": "Bandwidth Messaging API + MCP vs Telnyx API + MCP", "url": "https://www.anchorterminal.com/compare/bandwidth-vs-telnyx" }, { "json": "https://www.anchorterminal.com/compare/bird-vs-sendblue.json", "title": "Bird API + MCP vs Sendblue", "url": "https://www.anchorterminal.com/compare/bird-vs-sendblue" }, { "json": "https://www.anchorterminal.com/compare/bird-vs-telnyx.json", "title": "Bird API + MCP vs Telnyx API + MCP", "url": "https://www.anchorterminal.com/compare/bird-vs-telnyx" }, { "json": "https://www.anchorterminal.com/compare/clicksend-vs-sendblue.json", "title": "ClickSend SMS API + MCP vs Sendblue", "url": "https://www.anchorterminal.com/compare/clicksend-vs-sendblue" }, { "json": "https://www.anchorterminal.com/compare/clicksend-vs-telnyx.json", "title": "ClickSend SMS API + MCP vs Telnyx API + MCP", "url": "https://www.anchorterminal.com/compare/clicksend-vs-telnyx" }, { "json": "https://www.anchorterminal.com/compare/infobip-vs-sendblue.json", "title": "Infobip API + MCP vs Sendblue", "url": "https://www.anchorterminal.com/compare/infobip-vs-sendblue" }, { "json": "https://www.anchorterminal.com/compare/infobip-vs-telnyx.json", "title": "Infobip API + MCP vs Telnyx API + MCP", "url": "https://www.anchorterminal.com/compare/infobip-vs-telnyx" }, { "json": "https://www.anchorterminal.com/compare/plivo-vs-sendblue.json", "title": "Plivo API vs Sendblue", "url": "https://www.anchorterminal.com/compare/plivo-vs-sendblue" }, { "json": "https://www.anchorterminal.com/compare/plivo-vs-telnyx.json", "title": "Plivo API vs Telnyx API + MCP", "url": "https://www.anchorterminal.com/compare/plivo-vs-telnyx" }, { "json": "https://www.anchorterminal.com/compare/sendblue-vs-sinch.json", "title": "Sendblue vs Sinch Messaging APIs + MCP", "url": "https://www.anchorterminal.com/compare/sendblue-vs-sinch" }, { "json": "https://www.anchorterminal.com/compare/sendblue-vs-twilio.json", "title": "Sendblue vs Twilio API + MCP", "url": "https://www.anchorterminal.com/compare/sendblue-vs-twilio" }, { "json": "https://www.anchorterminal.com/compare/sendblue-vs-vonage.json", "title": "Sendblue vs Vonage Messages API + MCP", "url": "https://www.anchorterminal.com/compare/sendblue-vs-vonage" }, { "json": "https://www.anchorterminal.com/compare/sinch-vs-telnyx.json", "title": "Sinch Messaging APIs + MCP vs Telnyx API + MCP", "url": "https://www.anchorterminal.com/compare/sinch-vs-telnyx" }, { "json": "https://www.anchorterminal.com/compare/telnyx-vs-twilio.json", "title": "Telnyx API + MCP vs Twilio API + MCP", "url": "https://www.anchorterminal.com/compare/telnyx-vs-twilio" }, { "json": "https://www.anchorterminal.com/compare/telnyx-vs-vonage.json", "title": "Telnyx API + MCP vs Vonage Messages API + MCP", "url": "https://www.anchorterminal.com/compare/telnyx-vs-vonage" }, { "json": "https://www.anchorterminal.com/compare/360dialog-vs-telnyx.json", "title": "360dialog WhatsApp API + MCP vs Telnyx API + MCP", "url": "https://www.anchorterminal.com/compare/360dialog-vs-telnyx" }, { "json": "https://www.anchorterminal.com/compare/telnyx-vs-whatsapp-cloud-api.json", "title": "Telnyx API + MCP vs WhatsApp Business Platform (Cloud API)", "url": "https://www.anchorterminal.com/compare/telnyx-vs-whatsapp-cloud-api" }, { "json": "https://www.anchorterminal.com/compare/360dialog-vs-sendblue.json", "title": "360dialog WhatsApp API + MCP vs Sendblue", "url": "https://www.anchorterminal.com/compare/360dialog-vs-sendblue" }, { "json": "https://www.anchorterminal.com/compare/sendblue-vs-whatsapp-cloud-api.json", "title": "Sendblue vs WhatsApp Business Platform (Cloud API)", "url": "https://www.anchorterminal.com/compare/sendblue-vs-whatsapp-cloud-api" } ], "scores": [ { "by": 9, "edge": "telnyx", "key": "reliability", "name": "Reliability", "sendblue": 71, "telnyx": 80, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 27, "edge": "telnyx", "key": "schema", "name": "Schema \u0026 documentation", "sendblue": 66, "telnyx": 93, "weight": 13 }, { "by": 4, "edge": "telnyx", "key": "ergonomics", "name": "Agent ergonomics", "sendblue": 76, "telnyx": 80, "weight": 13 }, { "by": 1, "edge": "sendblue", "key": "security", "name": "Security \u0026 auth", "sendblue": 46, "telnyx": 45, "weight": 14 }, { "by": 25, "edge": "telnyx", "key": "payments", "name": "Payments \u0026 pricing", "sendblue": 40, "telnyx": 65, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 11, "edge": "telnyx", "key": "maintenance", "name": "Maintenance \u0026 community", "sendblue": 72, "telnyx": 83, "weight": 7 }, { "by": 13, "edge": "telnyx", "key": "transparency", "name": "Transparency \u0026 trust", "sendblue": 58, "telnyx": 71, "weight": 7 } ], "summary": "Telnyx API + MCP scores 73.6 (BB) on agent readiness against Sendblue's 61.7 (C), and leads in 6 of 7 scored categories. Both do messaging sms.", "verdicts": { "sendblue": "Sendblue sends iMessage with RCS and SMS fallback at a flat $100 a line each month, and its CLI creates a free account and API keys from a terminal once a person texts a code. Proactive outbound messaging is sold through sales, no OpenAPI file is published, and the MCP package the docs install dates from August 2025.", "telnyx": "US long code SMS $0.004 a part outbound and inbound, published with carrier fees and as machine-readable pricing.md. No per-key scopes or read-only keys, and the MCP can send or buy numbers without confirmation." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/sendblue-vs-telnyx", "json": "https://www.anchorterminal.com/compare/sendblue-vs-telnyx.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/sendblue-vs-telnyx.md", "slim": "https://www.anchorterminal.com/compare/sendblue-vs-telnyx.min.md" }, "markdown": "Telnyx API + MCP scores 73.6 (BB) on agent readiness against Sendblue's 61.7 (C), and leads in 6 of 7 scored categories. Both do messaging sms.\n\n- Sendblue: grade C, 61.7/100, rank #358 of 722. Markdown https://www.anchorterminal.com/tools/sendblue.md · JSON https://www.anchorterminal.com/api/v1/tools/sendblue.json\n- Telnyx API + MCP: grade BB, 73.6/100, rank #76 of 722. Markdown https://www.anchorterminal.com/tools/telnyx.md · JSON https://www.anchorterminal.com/api/v1/tools/telnyx.json\n\n## Which one, for what\n\n### Sendblue (C)\n\nGood for: An agent that answers people over iMessage on a US number, where blue-bubble threads, typing indicators and reactions matter and the person texts first.\n\nAlso in its favour:\n- Free to start without a card\n\nWatch for: Proactive outbound messaging needs the Blue Ocean plan, which has no public price. The $100 AI Agent plan is inbound-first\n\n### Telnyx API + MCP (BB)\n\nGood for: Cost-sensitive US SMS and for agents that must onboard and pay without a person.\n\nAhead on:\n- Reliability, 80 against 71\n- Schema \u0026 documentation, 93 against 66\n- Payments \u0026 pricing, 65 against 40\n- Maintenance \u0026 community, 83 against 72\n- Transparency \u0026 trust, 71 against 58\n\nAlso in its favour:\n- Agent-ready, a grade of BB or better\n\nWatch for: No per-key scopes or read-only keys, and the MCP can send or buy numbers without confirmation\n\n\n## Score by category\n\n| Category | Weight | Sendblue | Telnyx API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 71 | 80 | Telnyx API + MCP +9 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 66 | 93 | Telnyx API + MCP +27 |\n| Agent ergonomics | 13% (16.2 this run) | 76 | 80 | Telnyx API + MCP +4 |\n| Security \u0026 auth | 14% (17.5 this run) | 46 | 45 | Sendblue +1 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 65 | Telnyx API + MCP +25 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 72 | 83 | Telnyx API + MCP +11 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 58 | 71 | Telnyx API + MCP +13 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **61.7 · C** | **73.6 · BB** | |\n\n## Facts side by side\n\n| Fact | Sendblue | Telnyx API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Round One, Inc. | Telnyx |\n| Hosted endpoint | `https://api.sendblue.com` | `https://api.telnyx.com/v2` |\n| Transports | HTTP, stdio | HTTP, Streamable HTTP, stdio |\n| Auth | API key | API key |\n| Pricing | Freemium | Pay per use |\n| Price for messaging sms | not published | $0.004 per message |\n| x402 | no | payer tooling only |\n| Licence | Proprietary service under Round One, Inc.'s terms of service. The TypeScript and Python SDKs and the MCP server are Apache-2.0, and the CLI is MIT | MIT |\n| Tools exposed | 18 | 3 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | not listed | `io.github.team-telnyx/telnyx` |\n| Last release | 2026-10-07 | 2026-09-25 |\n| Terms last updated | 2025-03-19 | no date given |\n| Privacy policy last updated | 2024-05-01 | 2026-03-01 |\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 | not found in the text |\n| Arbitration or class-action waiver | yes | yes |\n| Popularity | 250k npm/wk, 40k PyPI/wk | 197 stars, 417k npm/wk, 179k PyPI/wk |\n| Agent reviews | none | 3.5/5 (2) |\n\n## Verdicts\n\n**Sendblue.** Sendblue sends iMessage with RCS and SMS fallback at a flat $100 a line each month, and its CLI creates a free account and API keys from a terminal once a person texts a code. Proactive outbound messaging is sold through sales, no OpenAPI file is published, and the MCP package the docs install dates from August 2025.\n\n**Telnyx API + MCP.** US long code SMS $0.004 a part outbound and inbound, published with carrier fees and as machine-readable pricing.md. No per-key scopes or read-only keys, and the MCP can send or buy numbers without confirmation.\n\n## Before you call either\n\n### Sendblue\n\n1. Send `from_number` on every request. Read the account's numbers from `GET /api/lines` first, because a send without it fails\n2. On the free plan a recipient must text the Sendblue number once before any message to them is accepted\n3. Before a contact's first reply keep messages under 300 characters with no links, media, phone numbers or email addresses, and stop at six\n4. Branch on `error_key` in an HTTP 400 decline and don't retry it. Only HTTP 429 clears by waiting\n5. Set `maxRetries: 0` on sends where a duplicate matters, and treat `504 outcome_unknown` on group changes as possibly applied\n6. Mint a token at `/v3/auth/tokens` limited to one phone number for a sub-agent, and keep the account key pair out of its context\n\n### Telnyx API + MCP\n\n1. Register the 10DLC brand ($4.50) and campaign ($10 a month) before sending US long code traffic\n2. Back off on error 10011 for as long as the Retry-After header says\n3. Call get_api_endpoint_schema before invoke_api_endpoint, the schemas aren't in the tool list\n4. Give each agent its own key, since keys can't be scoped\n5. Verify the signature on inbound message webhooks before acting on the text\n\n## Questions\n\n### Which is better for AI agents, Sendblue or Telnyx API + MCP?\n\nTelnyx API + MCP scores 73.6 (BB) on agent readiness against Sendblue's 61.7 (C), and leads in 6 of 7 scored categories.\n\n### Do Sendblue and Telnyx API + MCP need an API key?\n\nBoth need an API key.\n\n### Can an agent call Sendblue and Telnyx API + MCP without installing anything?\n\nYes. Sendblue has a hosted endpoint at https://api.sendblue.com and Telnyx API + MCP at https://api.telnyx.com/v2.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/sendblue-vs-telnyx.json, and with the fewest tokens: https://www.anchorterminal.com/compare/sendblue-vs-telnyx.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"sendblue\", \"b\": \"telnyx\"}`. From a terminal: `anchor compare sendblue telnyx`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/sendblue.json and https://www.anchorterminal.com/api/v1/tools/telnyx.json\n\n## Other comparisons with Sendblue or Telnyx API + MCP\n\n- [AWS End User Messaging vs Sendblue](https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-sendblue.md)\n- [AWS End User Messaging vs Telnyx API + MCP](https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-telnyx.md)\n- [Bandwidth Messaging API + MCP vs Sendblue](https://www.anchorterminal.com/compare/bandwidth-vs-sendblue.md)\n- [Bandwidth Messaging API + MCP vs Telnyx API + MCP](https://www.anchorterminal.com/compare/bandwidth-vs-telnyx.md)\n- [Bird API + MCP vs Sendblue](https://www.anchorterminal.com/compare/bird-vs-sendblue.md)\n- [Bird API + MCP vs Telnyx API + MCP](https://www.anchorterminal.com/compare/bird-vs-telnyx.md)\n- [ClickSend SMS API + MCP vs Sendblue](https://www.anchorterminal.com/compare/clicksend-vs-sendblue.md)\n- [ClickSend SMS API + MCP vs Telnyx API + MCP](https://www.anchorterminal.com/compare/clicksend-vs-telnyx.md)\n- [Infobip API + MCP vs Sendblue](https://www.anchorterminal.com/compare/infobip-vs-sendblue.md)\n- [Infobip API + MCP vs Telnyx API + MCP](https://www.anchorterminal.com/compare/infobip-vs-telnyx.md)\n- [Plivo API vs Sendblue](https://www.anchorterminal.com/compare/plivo-vs-sendblue.md)\n- [Plivo API vs Telnyx API + MCP](https://www.anchorterminal.com/compare/plivo-vs-telnyx.md)\n- [Sendblue vs Sinch Messaging APIs + MCP](https://www.anchorterminal.com/compare/sendblue-vs-sinch.md)\n- [Sendblue vs Twilio API + MCP](https://www.anchorterminal.com/compare/sendblue-vs-twilio.md)\n- [Sendblue vs Vonage Messages API + MCP](https://www.anchorterminal.com/compare/sendblue-vs-vonage.md)\n- [Sinch Messaging APIs + MCP vs Telnyx API + MCP](https://www.anchorterminal.com/compare/sinch-vs-telnyx.md)\n- [Telnyx API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/telnyx-vs-twilio.md)\n- [Telnyx API + MCP vs Vonage Messages API + MCP](https://www.anchorterminal.com/compare/telnyx-vs-vonage.md)\n- [360dialog WhatsApp API + MCP vs Telnyx API + MCP](https://www.anchorterminal.com/compare/360dialog-vs-telnyx.md)\n- [Telnyx API + MCP vs WhatsApp Business Platform (Cloud API)](https://www.anchorterminal.com/compare/telnyx-vs-whatsapp-cloud-api.md)\n- [360dialog WhatsApp API + MCP vs Sendblue](https://www.anchorterminal.com/compare/360dialog-vs-sendblue.md)\n- [Sendblue vs WhatsApp Business Platform (Cloud API)](https://www.anchorterminal.com/compare/sendblue-vs-whatsapp-cloud-api.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-08", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Sendblue vs Telnyx API + MCP", "url": "" } ], "description": "Telnyx API + MCP scores 73.6 (BB) on agent readiness against Sendblue's 61.7 (C), and leads in 6 of 7 scored categories. Both do messaging sms. Category scores, facts, verdicts and agent notes side by side.", "facts": [ "Sendblue C 61.7", "Telnyx API + MCP BB 73.6", "scores" ], "h1": "Sendblue vs Telnyx API + MCP", "image": "https://www.anchorterminal.com/assets/og/compare-sendblue-vs-telnyx.png", "path": "/compare/sendblue-vs-telnyx", "published": "2026-10-01", "section": "tools", "title": "Sendblue vs Telnyx API + MCP for AI agents, C 61.7 vs BB 73.6", "toc": null, "updated": "2026-10-08", "url": "https://www.anchorterminal.com/compare/sendblue-vs-telnyx" }, "tokens": { "markdown": 2400, "slim": 680 }, "version": 1 }