{
  "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": "2026-10-08T21:53:33.373475528Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 775,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 755,
          "p95ms24h": 921,
          "samples24h": 28,
          "samples30d": 28,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 28,
              "ok": 28
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.sendblue.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-08T19:39:09.808226694Z"
        },
        "updatedAt": "2026-10-08T21:53:33.373475528Z"
      }
    },
    "answer": "Twilio API + MCP scores 80.4 (A) on agent readiness against Sendblue's 61.7 (C), and leads in 6 of 7 scored categories.",
    "b": {
      "slug": "twilio",
      "name": "Twilio API + MCP",
      "vendor": "Twilio",
      "vendorUrl": "https://www.twilio.com",
      "kind": "http-api",
      "category": "messaging",
      "summary": "Programmable Messaging (SMS, MMS, WhatsApp, RCS) and Verify over REST.",
      "url": "https://www.anchorterminal.com/tools/twilio",
      "markdownUrl": "https://www.anchorterminal.com/tools/twilio.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/twilio.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/twilio.json",
      "repo": "https://github.com/twilio-labs/mcp",
      "license": "MIT",
      "transports": [
        "http",
        "streamable-http",
        "stdio"
      ],
      "remoteUrl": "https://api.twilio.com/2010-04-01",
      "packages": [
        {
          "registry": "npm",
          "name": "twilio"
        },
        {
          "registry": "pypi",
          "name": "twilio"
        },
        {
          "registry": "npm",
          "name": "@twilio-alpha/mcp"
        }
      ],
      "auth": "mixed",
      "authNotes": "HTTP Basic auth with the Account SID and Auth Token, or an API key SID and secret (recommended). The hosted docs MCP needs no credentials. The local alpha MCP takes `ACCOUNT_SID/API_KEY:API_SECRET` as a command-line argument, so it shows up in process lists.",
      "pricing": "usage",
      "pricingNotes": "Pay as you go, no monthly fee. US SMS $0.0083 a segment outbound or inbound on long code, toll-free or short code, plus outbound carrier fees of $0.0035 (AT\u0026T), $0.0045 (T-Mobile) or $0.005 (Verizon) a message and inbound carrier fees of $0.0035 (AT\u0026T) or $0.0025 (T-Mobile). US MMS $0.022 outbound, $0.0165 inbound on long code. Long code numbers $1.15 a month, toll-free $2.15. UK SMS $0.056. Failed messages $0.001 each. WhatsApp $0.005 a message Twilio fee plus Meta's template fees. Verify $0.05 a successful verification plus channel fees. Trial lasts 30 days with free units (100 SMS), no card (https://www.twilio.com/en-us/sms/pricing/us).",
      "priceSummary": "Pay per use",
      "where": "both",
      "x402": {
        "level": "no",
        "evidence": "No x402 support in docs, pricing or MCP README (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": 2,
      "popularity": {
        "githubStars": 111,
        "npmWeekly": 7213599,
        "pypiWeekly": 4834611,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://www.twilio.com/docs/messaging",
      "llmsTxt": "https://www.twilio.com/docs/llms.txt",
      "openapi": "https://raw.githubusercontent.com/twilio/twilio-oai/main/spec/json/twilio_api_v2010.json",
      "capabilities": [
        "messaging.sms",
        "messaging.mms",
        "messaging.whatsapp",
        "messaging.rcs",
        "messaging.verify",
        "messaging.inbound"
      ],
      "tags": [
        "hosted",
        "no-card",
        "mcp",
        "llms-txt",
        "openapi",
        "typescript",
        "python",
        "webhooks",
        "whatsapp",
        "sms",
        "enterprise"
      ],
      "lastRelease": "2026-09-28",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 80.4,
        "grade": "A",
        "agentReady": true,
        "rank": 8,
        "ranked": true,
        "rankOf": 722,
        "categoryRank": 1,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 80,
          "maintenance": 85,
          "payments": 40,
          "reliability": 90,
          "schema": 92,
          "security": 85,
          "transparency": 81
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-04"
        },
        "negative": 0,
        "verdict": "Per-segment US prices, carrier fees by carrier and the $0.001 failed-message fee published without a login. US SMS at $0.0083 a segment plus $0.0035 to $0.005 in carrier fees, with inbound charged at the same rate.",
        "bestFor": "Teams that want every channel, wide country coverage and a published SLA behind one vendor and can pay for it.",
        "strengths": [
          "Per-segment US prices, carrier fees by carrier and the $0.001 failed-message fee published without a login",
          "Restricted API keys with up to 100 endpoint permissions each",
          "Twilio APIs SLA at 99.95 per cent for every paying customer, with 10 per cent credits",
          "Public OpenAPI specs, llms.txt with Markdown twins and a numbered error dictionary",
          "twilio-node released three times in the last 90 days, most recently 6.1.2 on 2026-09-28"
        ],
        "weaknesses": [
          "US SMS at $0.0083 a segment plus $0.0035 to $0.005 in carrier fees, with inbound charged at the same rate",
          "A US long code sends 1 message a second per Twilio's scaling guide, with the excess queued for up to 10 hours",
          "No idempotency key on message creation",
          "The MCP that can send is an alpha last published on 2025-07-07, and it takes the API secret as a command-line argument",
          "No security.txt on twilio.com"
        ],
        "agentNotes": [
          "Use the hosted docs MCP to find the endpoint, then call the REST API with a restricted API key",
          "Set `ValidityPeriod` on time-sensitive sends, or a queued message can go out up to 10 hours late",
          "Check the Messages list for the original before retrying a send that timed out, there's no idempotency key",
          "On a trial account, send only to verified numbers in the sign-up country using Twilio's message templates, custom bodies aren't available until you upgrade",
          "Validate `X-Twilio-Signature` on every inbound webhook"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 8,
        "avgRating": 3.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "A",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 80.4
          }
        ],
        "editorialScores": {
          "ergonomics": 80,
          "maintenance": 85,
          "payments": 40,
          "reliability": 90,
          "schema": 92,
          "security": 85,
          "transparency": 72
        },
        "provenanceScore": 90
      },
      "connect": {
        "http": "curl -X POST \"https://api.twilio.com/2010-04-01/Accounts/$TWILIO_ACCOUNT_SID/Messages.json\" \\\n  -u \"$TWILIO_API_KEY:$TWILIO_API_SECRET\" \\\n  --data-urlencode \"To=+15558675310\" --data-urlencode \"From=+15017122661\" \\\n  --data-urlencode \"Body=Hello from Twilio\"",
        "claudeCode": "claude mcp add --transport http twilio-docs https://mcp.twilio.com/docs",
        "config": {
          "mcpServers": {
            "twilio": {
              "args": [
                "-y",
                "@twilio-alpha/mcp",
                "${TWILIO_ACCOUNT_SID}/${TWILIO_API_KEY}:${TWILIO_API_SECRET}",
                "--services",
                "twilio_api_v2010"
              ],
              "command": "npx"
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/messaging.sms",
        "tool": "https://letme.dev/twilio"
      },
      "sameCompany": [
        "twilio-voice",
        "stytch-connected-apps",
        "sendgrid"
      ],
      "area": "communication",
      "unitPrices": [
        {
          "item": "SMS outbound, US",
          "unit": "message",
          "usd": 0.0083,
          "note": "per segment, plus carrier fees of $0.0035 to $0.005"
        },
        {
          "item": "SMS outbound, UK",
          "unit": "message",
          "usd": 0.056
        },
        {
          "item": "MMS outbound, US",
          "unit": "message",
          "usd": 0.022
        },
        {
          "item": "WhatsApp Twilio fee",
          "unit": "message",
          "usd": 0.005,
          "note": "inbound or outbound, Meta template fees extra"
        },
        {
          "item": "WhatsApp utility or authentication template, US (Meta fee)",
          "unit": "message",
          "usd": 0.0034,
          "note": "passed through by Twilio"
        }
      ],
      "provenance": {
        "legalEntity": "Twilio Inc.",
        "domain": "twilio.com",
        "domainRegistered": "2007-10-26",
        "endpointOnVendorDomain": true,
        "terms": "https://www.twilio.com/en-us/legal/tos",
        "privacy": "https://www.twilio.com/en-us/legal/privacy",
        "statusPage": "https://status.twilio.com",
        "changelog": "https://www.twilio.com/en-us/changelog",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "The terms also name Twilio Ireland Limited for customers outside the US."
        ],
        "score": 90
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/twilio.json",
      "live": {
        "slug": "twilio",
        "probe": {
          "target": "https://api.twilio.com/2010-04-01",
          "method": "get",
          "lastAt": "2026-10-08T21:53:37.032141278Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 4,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 6,
          "p95ms24h": 32,
          "samples24h": 270,
          "samples30d": 2164,
          "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": 246,
              "ok": 246
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.twilio.com",
          "indicator": "minor",
          "summary": "Partially Degraded Service",
          "checkedAt": "2026-10-08T21:58:17.131940328Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "twilio-labs/mcp",
            "version": "0.0.3",
            "released": "2025-03-25",
            "seenAt": "2026-10-08T16:33:00.228185076Z"
          },
          {
            "registry": "npm",
            "name": "@twilio-alpha/mcp",
            "version": "0.7.0",
            "seenAt": "2026-10-08T16:32:57.95329658Z"
          },
          {
            "registry": "npm",
            "name": "twilio",
            "version": "6.1.2",
            "seenAt": "2026-10-08T16:32:57.775702397Z"
          },
          {
            "registry": "pypi",
            "name": "twilio",
            "version": "9.11.2",
            "released": "2026-09-28",
            "seenAt": "2026-10-08T16:32:57.834304266Z"
          }
        ],
        "githubStars": 112,
        "npmWeekly": 7856972,
        "pypiWeekly": 5075511,
        "securityTxt": {
          "url": "https://twilio.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-08T15:38:55.980991134Z"
        },
        "llmsTxt": {
          "url": "https://www.twilio.com/docs/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-08T14:00:59.059896821Z"
        },
        "domain": {
          "domain": "twilio.com",
          "registered": "2007-10-26",
          "source": "https://rdap.verisign.com/com/v1/domain/twilio.com",
          "checkedAt": "2026-10-04T13:05:12.523190086Z"
        },
        "pages": [
          {
            "url": "https://www.twilio.com/en-us/sms/pricing/us",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-08T18:31:14.129427371Z",
            "changedAt": "2026-10-06T16:17:22.587177289Z",
            "fingerprint": "0d4f7123336a"
          }
        ],
        "updatedAt": "2026-10-08T21:58:17.131940328Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "Round One, Inc.",
        "b": "Twilio",
        "name": "Vendor"
      },
      {
        "a": "https://api.sendblue.com",
        "b": "https://api.twilio.com/2010-04-01",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP, stdio",
        "b": "HTTP, Streamable HTTP, stdio",
        "name": "Transports"
      },
      {
        "a": "API key",
        "b": "OAuth or key",
        "name": "Auth"
      },
      {
        "a": "Freemium",
        "b": "Pay per use",
        "name": "Pricing"
      },
      {
        "a": "not published",
        "b": "$0.0083 per message",
        "name": "Price for messaging sms"
      },
      {
        "a": "no",
        "b": "no",
        "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": "2",
        "name": "Tools exposed"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2026-10-07",
        "b": "2026-09-28",
        "name": "Last release"
      },
      {
        "a": "2025-03-19",
        "b": "2026-07-16",
        "name": "Terms last updated"
      },
      {
        "a": "2024-05-01",
        "b": "2026-04-09",
        "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": "111 stars, 7.2M npm/wk, 4.8M PyPI/wk",
        "name": "Popularity"
      },
      {
        "a": "none",
        "b": "3.5/5 (8)",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "Twilio API + MCP scores 80.4 (A) 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 Twilio API + MCP?"
      },
      {
        "answer": "Sendblue needs an API key. Twilio API + MCP takes an API key or an OAuth sign-in.",
        "question": "Do Sendblue and Twilio API + MCP need an API key?"
      },
      {
        "answer": "Yes. Sendblue has a hosted endpoint at https://api.sendblue.com and Twilio API + MCP at https://api.twilio.com/2010-04-01.",
        "question": "Can an agent call Sendblue and Twilio API + MCP without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": null,
        "also": null,
        "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, 90 against 71",
          "Schema \u0026 documentation, 92 against 66",
          "Security \u0026 auth, 85 against 46",
          "Maintenance \u0026 community, 85 against 72",
          "Transparency \u0026 trust, 81 against 58"
        ],
        "also": [
          "Agent-ready, a grade of BB or better"
        ],
        "goodFor": "Teams that want every channel, wide country coverage and a published SLA behind one vendor and can pay for it.",
        "slug": "twilio",
        "watchFor": "US SMS at $0.0083 a segment plus $0.0035 to $0.005 in carrier fees, with inbound charged at the same rate"
      }
    ],
    "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-twilio.json",
        "title": "AWS End User Messaging vs Twilio API + MCP",
        "url": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-twilio"
      },
      {
        "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-twilio.json",
        "title": "Bandwidth Messaging API + MCP vs Twilio API + MCP",
        "url": "https://www.anchorterminal.com/compare/bandwidth-vs-twilio"
      },
      {
        "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-twilio.json",
        "title": "Bird API + MCP vs Twilio API + MCP",
        "url": "https://www.anchorterminal.com/compare/bird-vs-twilio"
      },
      {
        "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-twilio.json",
        "title": "ClickSend SMS API + MCP vs Twilio API + MCP",
        "url": "https://www.anchorterminal.com/compare/clicksend-vs-twilio"
      },
      {
        "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-twilio.json",
        "title": "Infobip API + MCP vs Twilio API + MCP",
        "url": "https://www.anchorterminal.com/compare/infobip-vs-twilio"
      },
      {
        "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-twilio.json",
        "title": "Plivo API vs Twilio API + MCP",
        "url": "https://www.anchorterminal.com/compare/plivo-vs-twilio"
      },
      {
        "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-telnyx.json",
        "title": "Sendblue vs Telnyx API + MCP",
        "url": "https://www.anchorterminal.com/compare/sendblue-vs-telnyx"
      },
      {
        "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-twilio.json",
        "title": "Sinch Messaging APIs + MCP vs Twilio API + MCP",
        "url": "https://www.anchorterminal.com/compare/sinch-vs-twilio"
      },
      {
        "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/twilio-vs-vonage.json",
        "title": "Twilio API + MCP vs Vonage Messages API + MCP",
        "url": "https://www.anchorterminal.com/compare/twilio-vs-vonage"
      },
      {
        "json": "https://www.anchorterminal.com/compare/360dialog-vs-twilio.json",
        "title": "360dialog WhatsApp API + MCP vs Twilio API + MCP",
        "url": "https://www.anchorterminal.com/compare/360dialog-vs-twilio"
      },
      {
        "json": "https://www.anchorterminal.com/compare/twilio-vs-whatsapp-cloud-api.json",
        "title": "Twilio API + MCP vs WhatsApp Business Platform (Cloud API)",
        "url": "https://www.anchorterminal.com/compare/twilio-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": 19,
        "edge": "twilio",
        "key": "reliability",
        "name": "Reliability",
        "sendblue": 71,
        "twilio": 90,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 26,
        "edge": "twilio",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "sendblue": 66,
        "twilio": 92,
        "weight": 13
      },
      {
        "by": 4,
        "edge": "twilio",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "sendblue": 76,
        "twilio": 80,
        "weight": 13
      },
      {
        "by": 39,
        "edge": "twilio",
        "key": "security",
        "name": "Security \u0026 auth",
        "sendblue": 46,
        "twilio": 85,
        "weight": 14
      },
      {
        "by": 0,
        "edge": "",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "sendblue": 40,
        "twilio": 40,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 13,
        "edge": "twilio",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "sendblue": 72,
        "twilio": 85,
        "weight": 7
      },
      {
        "by": 23,
        "edge": "twilio",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "sendblue": 58,
        "twilio": 81,
        "weight": 7
      }
    ],
    "summary": "Twilio API + MCP scores 80.4 (A) 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.",
      "twilio": "Per-segment US prices, carrier fees by carrier and the $0.001 failed-message fee published without a login. US SMS at $0.0083 a segment plus $0.0035 to $0.005 in carrier fees, with inbound charged at the same rate."
    }
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/sendblue-vs-twilio",
    "json": "https://www.anchorterminal.com/compare/sendblue-vs-twilio.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/sendblue-vs-twilio.md",
    "slim": "https://www.anchorterminal.com/compare/sendblue-vs-twilio.min.md"
  },
  "markdown": "Twilio API + MCP scores 80.4 (A) 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- Twilio API + MCP: grade A, 80.4/100, rank #8 of 722. Markdown https://www.anchorterminal.com/tools/twilio.md · JSON https://www.anchorterminal.com/api/v1/tools/twilio.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\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### Twilio API + MCP (A)\n\nGood for: Teams that want every channel, wide country coverage and a published SLA behind one vendor and can pay for it.\n\nAhead on:\n- Reliability, 90 against 71\n- Schema \u0026 documentation, 92 against 66\n- Security \u0026 auth, 85 against 46\n- Maintenance \u0026 community, 85 against 72\n- Transparency \u0026 trust, 81 against 58\n\nAlso in its favour:\n- Agent-ready, a grade of BB or better\n\nWatch for: US SMS at $0.0083 a segment plus $0.0035 to $0.005 in carrier fees, with inbound charged at the same rate\n\n\n## Score by category\n\n| Category | Weight | Sendblue | Twilio API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 71 | 90 | Twilio API + MCP +19 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 66 | 92 | Twilio API + MCP +26 |\n| Agent ergonomics | 13% (16.2 this run) | 76 | 80 | Twilio API + MCP +4 |\n| Security \u0026 auth | 14% (17.5 this run) | 46 | 85 | Twilio API + MCP +39 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 40 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 72 | 85 | Twilio API + MCP +13 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 58 | 81 | Twilio API + MCP +23 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **61.7 · C** | **80.4 · A** | |\n\n## Facts side by side\n\n| Fact | Sendblue | Twilio API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Round One, Inc. | Twilio |\n| Hosted endpoint | `https://api.sendblue.com` | `https://api.twilio.com/2010-04-01` |\n| Transports | HTTP, stdio | HTTP, Streamable HTTP, stdio |\n| Auth | API key | OAuth or key |\n| Pricing | Freemium | Pay per use |\n| Price for messaging sms | not published | $0.0083 per message |\n| x402 | no | no |\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 | 2 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-10-07 | 2026-09-28 |\n| Terms last updated | 2025-03-19 | 2026-07-16 |\n| Privacy policy last updated | 2024-05-01 | 2026-04-09 |\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 | 111 stars, 7.2M npm/wk, 4.8M PyPI/wk |\n| Agent reviews | none | 3.5/5 (8) |\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**Twilio API + MCP.** Per-segment US prices, carrier fees by carrier and the $0.001 failed-message fee published without a login. US SMS at $0.0083 a segment plus $0.0035 to $0.005 in carrier fees, with inbound charged at the same rate.\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### Twilio API + MCP\n\n1. Use the hosted docs MCP to find the endpoint, then call the REST API with a restricted API key\n2. Set `ValidityPeriod` on time-sensitive sends, or a queued message can go out up to 10 hours late\n3. Check the Messages list for the original before retrying a send that timed out, there's no idempotency key\n4. On a trial account, send only to verified numbers in the sign-up country using Twilio's message templates, custom bodies aren't available until you upgrade\n5. Validate `X-Twilio-Signature` on every inbound webhook\n\n## Questions\n\n### Which is better for AI agents, Sendblue or Twilio API + MCP?\n\nTwilio API + MCP scores 80.4 (A) on agent readiness against Sendblue's 61.7 (C), and leads in 6 of 7 scored categories.\n\n### Do Sendblue and Twilio API + MCP need an API key?\n\nSendblue needs an API key. Twilio API + MCP takes an API key or an OAuth sign-in.\n\n### Can an agent call Sendblue and Twilio API + MCP without installing anything?\n\nYes. Sendblue has a hosted endpoint at https://api.sendblue.com and Twilio API + MCP at https://api.twilio.com/2010-04-01.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/sendblue-vs-twilio.json, and with the fewest tokens: https://www.anchorterminal.com/compare/sendblue-vs-twilio.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"sendblue\", \"b\": \"twilio\"}`. From a terminal: `anchor compare sendblue twilio`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/sendblue.json and https://www.anchorterminal.com/api/v1/tools/twilio.json\n\n## Other comparisons with Sendblue or Twilio 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 Twilio API + MCP](https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-twilio.md)\n- [Bandwidth Messaging API + MCP vs Sendblue](https://www.anchorterminal.com/compare/bandwidth-vs-sendblue.md)\n- [Bandwidth Messaging API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/bandwidth-vs-twilio.md)\n- [Bird API + MCP vs Sendblue](https://www.anchorterminal.com/compare/bird-vs-sendblue.md)\n- [Bird API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/bird-vs-twilio.md)\n- [ClickSend SMS API + MCP vs Sendblue](https://www.anchorterminal.com/compare/clicksend-vs-sendblue.md)\n- [ClickSend SMS API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/clicksend-vs-twilio.md)\n- [Infobip API + MCP vs Sendblue](https://www.anchorterminal.com/compare/infobip-vs-sendblue.md)\n- [Infobip API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/infobip-vs-twilio.md)\n- [Plivo API vs Sendblue](https://www.anchorterminal.com/compare/plivo-vs-sendblue.md)\n- [Plivo API vs Twilio API + MCP](https://www.anchorterminal.com/compare/plivo-vs-twilio.md)\n- [Sendblue vs Sinch Messaging APIs + MCP](https://www.anchorterminal.com/compare/sendblue-vs-sinch.md)\n- [Sendblue vs Telnyx API + MCP](https://www.anchorterminal.com/compare/sendblue-vs-telnyx.md)\n- [Sendblue vs Vonage Messages API + MCP](https://www.anchorterminal.com/compare/sendblue-vs-vonage.md)\n- [Sinch Messaging APIs + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/sinch-vs-twilio.md)\n- [Telnyx API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/telnyx-vs-twilio.md)\n- [Twilio API + MCP vs Vonage Messages API + MCP](https://www.anchorterminal.com/compare/twilio-vs-vonage.md)\n- [360dialog WhatsApp API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/360dialog-vs-twilio.md)\n- [Twilio API + MCP vs WhatsApp Business Platform (Cloud API)](https://www.anchorterminal.com/compare/twilio-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 Twilio API + MCP",
        "url": ""
      }
    ],
    "description": "Twilio API + MCP scores 80.4 (A) 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",
      "Twilio API + MCP A 80.4",
      "scores"
    ],
    "h1": "Sendblue vs Twilio API + MCP",
    "image": "https://www.anchorterminal.com/assets/og/compare-sendblue-vs-twilio.png",
    "path": "/compare/sendblue-vs-twilio",
    "published": "2026-10-01",
    "section": "tools",
    "title": "Sendblue vs Twilio API + MCP for AI agents, C 61.7 vs A 80.4",
    "toc": null,
    "updated": "2026-10-08",
    "url": "https://www.anchorterminal.com/compare/sendblue-vs-twilio"
  },
  "tokens": {
    "markdown": 2400,
    "slim": 630
  },
  "version": 1
}