{ "data": { "a": { "slug": "sinch", "name": "Sinch Messaging APIs + MCP", "vendor": "Sinch", "vendorUrl": "https://sinch.com", "kind": "http-api", "category": "messaging", "summary": "The SMS REST API and the Conversation API, which sends SMS, RCS, WhatsApp, Viber and Messenger through one message format, plus the Verification API.", "url": "https://www.anchorterminal.com/tools/sinch", "markdownUrl": "https://www.anchorterminal.com/tools/sinch.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/sinch.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/sinch.json", "repo": "https://github.com/sinch/sinch-mcp-server", "license": "Apache-2.0", "transports": [ "http", "stdio", "streamable-http" ], "remoteUrl": "https://us.sms.api.sinch.com/xms/v1", "packages": [ { "registry": "npm", "name": "@sinch/sdk-core" }, { "registry": "pypi", "name": "sinch" }, { "registry": "npm", "name": "@sinch/mcp" } ], "auth": "mixed", "authNotes": "The SMS API takes a service-plan Bearer token. Conversation, Numbers and Templates use OAuth 2.0 client credentials from a project access key (Basic auth also accepted). Verification and Voice use an application key and secret. The MCP server's HTTP mode does no inbound auth in single-tenant mode.", "pricing": "usage", "pricingNotes": "Pay as you go. US SMS $0.0078 a message on 10DLC or toll-free and $0.009 on short code, same rate inbound, plus carrier fees. Other countries and WhatsApp are priced through a country selector. Trial accounts get 2 units of local currency (for example $2) and a test number, no card (https://sinch.com/pricing/sms/).", "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": 54, "popularity": { "githubStars": 1, "npmWeekly": 15648, "pypiWeekly": 11166, "asOf": "2026-09-30" }, "docsUrl": "https://developers.sinch.com/docs/conversation", "llmsTxt": "https://developers.sinch.com/llms.txt", "openapi": "https://developers.sinch.com/_bundle/docs/conversation/api-reference/conversation.yaml", "capabilities": [ "messaging.sms", "messaging.whatsapp", "messaging.rcs", "messaging.verify", "messaging.inbound" ], "tags": [ "hosted", "no-card", "mcp", "openapi", "llms-txt", "typescript", "python", "webhooks", "whatsapp", "sms", "enterprise" ], "lastRelease": "2026-09-23", "graded": true, "anchor": { "graded": true, "score": 63.3, "grade": "B", "agentReady": false, "rank": 206, "ranked": true, "rankOf": 452, "categoryRank": 6, "methodology": "0.3", "run": "2026-10-01", "scores": { "ergonomics": 50, "maintenance": 83, "payments": 40, "reliability": 73, "schema": 81, "security": 50, "transparency": 73 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "The Conversation API covers SMS, RCS, WhatsApp, Viber and Messenger through one message format. The MCP server is a developer preview whose npm release dates from 2026-04-14.", "strengths": [ "The Conversation API covers SMS, RCS, WhatsApp, Viber and Messenger through one message format", "Published limits of 800 requests a second per project and a 500,000-message queue per app", "HMAC-signed callbacks with a nonce and timestamp", "Trial with 2 units of local currency and a test number, no card", "SDK releases in Java and Python in September 2026" ], "weaknesses": [ "The MCP server is a developer preview whose npm release dates from 2026-04-14", "54 MCP tools with no readOnlyHint or destructiveHint annotations", "Separate credential schemes for the SMS, Conversation and Verification APIs, none with scopes", "No SLA, and no Retry-After on 429", "No security.txt or bug bounty found" ], "agentNotes": [ "Load the MCP with `--tags` for the channels you need, or all 54 tools land in context", "Keep a single-tenant HTTP MCP bound to localhost, it does no inbound authentication", "Expect sends to drain at 20 messages a second per app unless Sinch raises it", "Verify `x-sinch-webhook-signature` against the raw body before parsing the JSON", "Use the regional base URL (us, eu or br) that matches the project" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "B", "methodology": "0.3", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 63.3 } ], "editorialScores": { "ergonomics": 50, "maintenance": 83, "payments": 40, "reliability": 73, "schema": 81, "security": 50, "transparency": 55 }, "provenanceScore": 90 }, "connect": { "http": "curl -X POST \"https://us.sms.api.sinch.com/xms/v1/$SINCH_SERVICE_PLAN_ID/batches\" \\\n -H \"Authorization: Bearer $SINCH_API_TOKEN\" -H \"Content-Type: application/json\" \\\n -d '{\"from\":\"+12025550123\",\"to\":[\"+15551234567\"],\"body\":\"Hello from Sinch\"}'", "config": { "mcpServers": { "sinch": { "args": [ "-y", "@sinch/mcp" ], "command": "npx", "env": { "CONVERSATION_APP_ID": "${SINCH_CONVERSATION_APP_ID}", "CONVERSATION_REGION": "us", "KEY_ID": "${SINCH_KEY_ID}", "KEY_SECRET": "${SINCH_KEY_SECRET}", "PROJECT_ID": "${SINCH_PROJECT_ID}" } } } } }, "letme": { "capability": "https://letme.dev/messaging.sms", "tool": "https://letme.dev/sinch" }, "sameCompany": [ "sinch-voice" ], "area": "communication", "unitPrices": [ { "item": "SMS outbound, US 10DLC or toll-free", "unit": "message", "usd": 0.0078, "note": "plus carrier fees" }, { "item": "SMS outbound, US short code", "unit": "message", "usd": 0.009, "note": "plus carrier fees" } ], "provenance": { "legalEntity": "Sinch AB (publ)", "domain": "sinch.com", "domainRegistered": "1997-12-03", "endpointOnVendorDomain": true, "terms": "https://sinch.com/legal/terms-and-conditions/other-sinch-terms-conditions/general-terms-and-conditions/", "privacy": "https://sinch.com/legal/privacy-notice/", "statusPage": "https://status.sinch.com", "changelog": "https://developers.sinch.com/docs/conversation/release-notes", "securityTxt": "none", "checked": "2026-09-30", "notes": [ "The general terms name the contracting Sinch entity only in the order form or master agreement. Sinch AB (publ) is the listed parent." ], "score": 90 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/sinch.json", "live": { "slug": "sinch", "probe": { "target": "https://us.sms.api.sinch.com/xms/v1", "method": "get", "lastAt": "2026-10-04T23:32:54.398878577Z", "lastOk": true, "lastStatus": 401, "lastMs": 247, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 250, "p95ms24h": 287, "samples24h": 272, "samples30d": 1097, "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": 267, "ok": 267 } ] }, "vendorStatus": { "page": "https://status.sinch.com", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-04T23:28:02.545757715Z" }, "versions": [ { "registry": "github", "name": "sinch/sinch-mcp-server", "version": "v0.0.1-alpha6", "released": "2026-04-14", "seenAt": "2026-10-04T16:40:04.435716963Z" }, { "registry": "npm", "name": "@sinch/mcp", "version": "0.0.1-alpha.6", "seenAt": "2026-10-04T16:40:02.692338984Z" }, { "registry": "npm", "name": "@sinch/sdk-core", "version": "1.6.0", "seenAt": "2026-10-04T16:40:02.237951249Z" }, { "registry": "pypi", "name": "sinch", "version": "2.2.0", "released": "2026-09-21", "seenAt": "2026-10-04T16:40:02.585087516Z" } ], "githubStars": 1, "npmWeekly": 18032, "pypiWeekly": 12911, "securityTxt": { "url": "https://sinch.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-04T15:15:40.047440487Z" }, "llmsTxt": { "url": "https://developers.sinch.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-04T15:18:15.885568819Z" }, "domain": { "domain": "sinch.com", "registered": "1997-12-03", "source": "https://rdap.verisign.com/com/v1/domain/sinch.com", "checkedAt": "2026-10-04T13:05:54.744606475Z" }, "pages": [ { "url": "https://developers.sinch.com/docs/conversation/release-notes", "kind": "changelog", "status": 200, "checkedAt": "2026-10-04T15:43:02.860196611Z", "changedAt": "2026-10-04T15:43:02.860196611Z", "fingerprint": "3bd59d113afa" }, { "url": "https://sinch.com/pricing/sms/", "kind": "pricing", "status": 304, "checkedAt": "2026-10-04T15:47:52.856561614Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "4d9f998b696c" } ], "updatedAt": "2026-10-04T23:32:54.398878577Z" } }, "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 carrier fees of $0.0035 (AT\u0026T), $0.0045 (T-Mobile) or $0.005 (Verizon) a message. 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": 5, "ranked": true, "rankOf": 452, "categoryRank": 1, "methodology": "0.3", "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": "2026-10-01" }, "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.", "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 $0.005 in carrier fees, with inbound charged at the same rate", "A US long code sends 1 message a second per Twilio's scaling guide, with the excess queued for up to 10 hours", "No idempotency key on message creation", "The MCP that can send is an alpha last published on 2025-07-07, and it takes the API secret as a command-line argument", "No security.txt on twilio.com" ], "agentNotes": [ "Use the hosted docs MCP to find the endpoint, then call the REST API with a restricted API key", "Set `ValidityPeriod` on time-sensitive sends, or a queued message can go out up to 10 hours late", "Check the Messages list for the original before retrying a send that timed out, there's no idempotency key", "Send only to verified numbers on a trial account, other recipients fail", "Validate `X-Twilio-Signature` on every inbound webhook" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 8, "avgRating": 3.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "A", "methodology": "0.3", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 80.4 } ], "editorialScores": { "ergonomics": 80, "maintenance": 85, "payments": 40, "reliability": 90, "schema": 92, "security": 85, "transparency": 72 }, "provenanceScore": 90 }, "connect": { "http": "curl -X POST \"https://api.twilio.com/2010-04-01/Accounts/$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": "2026-10-04T23:32:55.740106605Z", "lastOk": true, "lastStatus": 200, "lastMs": 7, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 6, "p95ms24h": 38, "samples24h": 272, "samples30d": 1097, "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": 267, "ok": 267 } ] }, "vendorStatus": { "page": "https://status.twilio.com", "indicator": "minor", "summary": "Partially Degraded Service", "checkedAt": "2026-10-04T23:28:04.745244988Z" }, "versions": [ { "registry": "github", "name": "twilio-labs/mcp", "version": "0.0.3", "released": "2025-03-25", "seenAt": "2026-10-04T16:42:32.789428185Z" }, { "registry": "npm", "name": "@twilio-alpha/mcp", "version": "0.7.0", "seenAt": "2026-10-04T16:42:30.744113269Z" }, { "registry": "npm", "name": "twilio", "version": "6.1.2", "seenAt": "2026-10-04T16:42:30.579018738Z" }, { "registry": "pypi", "name": "twilio", "version": "9.11.2", "released": "2026-09-28", "seenAt": "2026-10-04T16:42:30.630910608Z" } ], "githubStars": 112, "npmWeekly": 7817134, "pypiWeekly": 5153208, "securityTxt": { "url": "https://twilio.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-04T15:15:43.282608786Z" }, "llmsTxt": { "url": "https://www.twilio.com/docs/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-04T15:18:20.462714763Z" }, "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": "2026-10-04T15:52:40.063019901Z", "changedAt": "2026-10-03T15:40:31.280177197Z", "fingerprint": "b98c31a1bf5b" } ], "updatedAt": "2026-10-04T23:32:55.740106605Z" } }, "summary": "Twilio API + MCP has a score of 80.4 (A) against Sinch Messaging APIs + MCP's 63.3 (B). Both do messaging sms. The largest gap is security \u0026 auth, 35 points." }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/sinch-vs-twilio", "json": "https://www.anchorterminal.com/compare/sinch-vs-twilio.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/sinch-vs-twilio.md", "slim": "https://www.anchorterminal.com/compare/sinch-vs-twilio.min.md" }, "markdown": "Twilio API + MCP has a score of 80.4 (A) against Sinch Messaging APIs + MCP's 63.3 (B). Both do messaging sms. The largest gap is security \u0026 auth, 35 points.\n\n- Sinch Messaging APIs + MCP: grade B, 63.3/100, rank #206 of 452. Markdown https://www.anchorterminal.com/tools/sinch.md · JSON https://www.anchorterminal.com/api/v1/tools/sinch.json\n- Twilio API + MCP: grade A, 80.4/100, rank #5 of 452. 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\nPick Sinch Messaging APIs + MCP for nothing in particular (no category where it leads by five points or more).\n\nPick Twilio API + MCP for reliability (+17), schema \u0026 documentation (+11), agent ergonomics (+30), security \u0026 auth (+35), transparency \u0026 trust (+8).\n\n## Score by category\n\n| Category | Weight | Sinch Messaging APIs + MCP | Twilio API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 73 | 90 | Twilio API + MCP +17 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 81 | 92 | Twilio API + MCP +11 |\n| Agent ergonomics | 13% (16.2 this run) | 50 | 80 | Twilio API + MCP +30 |\n| Security \u0026 auth | 14% (17.5 this run) | 50 | 85 | Twilio API + MCP +35 |\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) | 83 | 85 | Twilio API + MCP +2 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 73 | 81 | Twilio API + MCP +8 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **63.3 · B** | **80.4 · A** | |\n\n## Facts side by side\n\n| Fact | Sinch Messaging APIs + MCP | Twilio API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Sinch | Twilio |\n| Hosted endpoint | `https://us.sms.api.sinch.com/xms/v1` | `https://api.twilio.com/2010-04-01` |\n| Transports | HTTP, stdio, Streamable HTTP | HTTP, Streamable HTTP, stdio |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Pay per use | Pay per use |\n| x402 | no | no |\n| Licence | Apache-2.0 | MIT |\n| Tools exposed | 54 | 2 |\n| Context cost (tools/list) | n/a | n/a |\n| p95 latency | not measured yet | not measured yet |\n| Availability (30d) | not measured yet | not measured yet |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | not listed | not listed |\n| Last release | 2026-09-23 | 2026-09-28 |\n| Popularity | 1 stars, 16k npm/wk, 11k PyPI/wk | 111 stars, 7.2M npm/wk, 4.8M PyPI/wk |\n| Agent reviews | 3/5 (2) | 3.5/5 (8) |\n\n## Verdicts\n\n**Sinch Messaging APIs + MCP.** The Conversation API covers SMS, RCS, WhatsApp, Viber and Messenger through one message format. The MCP server is a developer preview whose npm release dates from 2026-04-14.\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### Sinch Messaging APIs + MCP\n\n1. Load the MCP with `--tags` for the channels you need, or all 54 tools land in context\n2. Keep a single-tenant HTTP MCP bound to localhost, it does no inbound authentication\n3. Expect sends to drain at 20 messages a second per app unless Sinch raises it\n4. Verify `x-sinch-webhook-signature` against the raw body before parsing the JSON\n5. Use the regional base URL (us, eu or br) that matches the project\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. Send only to verified numbers on a trial account, other recipients fail\n5. Validate `X-Twilio-Signature` on every inbound webhook\n\n## Other comparisons with Sinch Messaging APIs + MCP or Twilio API + MCP\n\n- [Bandwidth Messaging API + MCP vs Sinch Messaging APIs + MCP](https://www.anchorterminal.com/compare/bandwidth-vs-sinch.md)\n- [Bandwidth Messaging API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/bandwidth-vs-twilio.md)\n- [Bird API + MCP vs Sinch Messaging APIs + MCP](https://www.anchorterminal.com/compare/bird-vs-sinch.md)\n- [Bird API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/bird-vs-twilio.md)\n- [ClickSend SMS API + MCP vs Sinch Messaging APIs + MCP](https://www.anchorterminal.com/compare/clicksend-vs-sinch.md)\n- [ClickSend SMS API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/clicksend-vs-twilio.md)\n- [Infobip API + MCP vs Sinch Messaging APIs + MCP](https://www.anchorterminal.com/compare/infobip-vs-sinch.md)\n- [Infobip API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/infobip-vs-twilio.md)\n- [Plivo API vs Sinch Messaging APIs + MCP](https://www.anchorterminal.com/compare/plivo-vs-sinch.md)\n- [Plivo API vs Twilio API + MCP](https://www.anchorterminal.com/compare/plivo-vs-twilio.md)\n- [Sinch Messaging APIs + MCP vs Telnyx API + MCP](https://www.anchorterminal.com/compare/sinch-vs-telnyx.md)\n- [Sinch Messaging APIs + MCP vs Vonage Messages API + MCP](https://www.anchorterminal.com/compare/sinch-vs-vonage.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 Sinch Messaging APIs + MCP](https://www.anchorterminal.com/compare/360dialog-vs-sinch.md)\n- [360dialog WhatsApp API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/360dialog-vs-twilio.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-04", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.3", "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": "Sinch Messaging APIs + MCP vs Twilio API + MCP", "url": "" } ], "description": "Twilio API + MCP has a score of 80.4 (A) against Sinch Messaging APIs + MCP's 63.3 (B). Both do messaging sms. The largest gap is security \u0026 auth, 35 points. Category scores, facts, verdicts and agent notes side by side.", "facts": [ "Sinch Messaging APIs + MCP B 63.3", "Twilio API + MCP A 80.4", "scores" ], "h1": "Sinch Messaging APIs + MCP vs Twilio API + MCP", "image": "https://www.anchorterminal.com/assets/og/compare-sinch-vs-twilio.png", "path": "/compare/sinch-vs-twilio", "published": "2026-10-01", "section": "tools", "title": "Sinch Messaging APIs + MCP vs Twilio API + MCP for AI agents", "toc": null, "updated": "2026-10-04", "url": "https://www.anchorterminal.com/compare/sinch-vs-twilio" }, "tokens": { "markdown": 1650, "slim": 380 }, "version": 1 }