{ "data": { "a": { "slug": "livekit-telephony", "name": "LiveKit Telephony", "vendor": "LiveKit Incorporated", "vendorUrl": "https://livekit.com", "kind": "http-api", "category": "voice-calling", "summary": "LiveKit Telephony connects phone calls to LiveKit rooms as SIP participants. On LiveKit Cloud it covers SIP trunks to outside carriers, US inbound phone numbers, dispatch rules and transfers, managed through a Twirp API, server SDKs and the `lk` CLI.", "url": "https://www.anchorterminal.com/tools/livekit-telephony", "markdownUrl": "https://www.anchorterminal.com/tools/livekit-telephony.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/livekit-telephony.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/livekit-telephony.json", "repo": "https://github.com/livekit/sip", "license": "Proprietary cloud service under LiveKit's Terms of Service. The SIP service (livekit/sip), the protocol definitions, the CLI and the server SDKs are Apache 2.0", "transports": [ "http" ], "packages": [ { "registry": "npm", "name": "livekit-server-sdk" }, { "registry": "pypi", "name": "livekit-api" }, { "registry": "go", "name": "github.com/livekit/server-sdk-go/v2" } ], "auth": "api-key", "authNotes": "A project API key and secret, created in the LiveKit Cloud dashboard, sign a JWT sent as `Authorization: Bearer \u003ctoken\u003e`. The token's `sip` grant carries `admin` (trunks, dispatch rules, phone numbers) or `call` (`CreateSIPParticipant` and `TransferSIPParticipant`), and its lifetime is set by whoever signs it. Keys can be rotated in the dashboard and the secret is shown once. Access is self-serve after a browser sign-up. The CLI links a project with `lk cloud auth`, which opens a browser.", "pricing": "freemium", "pricingNotes": "Free Build plan with no card. It includes 1 US local number, 50 US local inbound minutes and 1,000 third-party SIP minutes a month as a hard cap. Ship starts at $50 a month and Scale at $500, with third-party SIP minutes at $0.004 and $0.003 past the allowance, US local inbound at $0.01 a minute, toll-free inbound at $0.02, local numbers $1 a month and toll-free $2. A third-party carrier bills its own trunk and number charges. A number released mid-month is billed for the full month. Enterprise is priced by sales (https://livekit.com/pricing.md, checked 2026-10-08).", "priceSummary": "$1 / mo", "where": "local", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the telephony docs, the SIP and Phone Numbers API references or the pricing page (checked 2026-10-08).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 480, "npmWeekly": 2938925, "pypiWeekly": 1673299, "asOf": "2026-10-08" }, "docsUrl": "https://docs.livekit.io/telephony/", "llmsTxt": "https://docs.livekit.io/telephony/llms.txt", "capabilities": [ "voice.calls", "voice.sip", "voice.numbers", "voice.transfer", "voice.streaming" ], "tags": [ "hosted", "sip", "open-source", "llms-txt", "cli", "typescript", "python", "go", "webhooks", "free-tier", "status-page", "soc2" ], "lastRelease": "2026-10-08", "graded": true, "anchor": { "graded": true, "score": 67.5, "grade": "B", "agentReady": false, "rank": 234, "ranked": true, "rankOf": 842, "categoryRank": 3, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 66, "maintenance": 90, "payments": 40, "reliability": 65, "schema": 84, "security": 61, "transparency": 75 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "Signed tokens separate the right to dial (`sip.call`) from the right to manage trunks (`sip.admin`), and per-minute prices are public with a free plan that needs no card. LiveKit's own phone numbers are US only and inbound only, so outbound calls need a third-party SIP trunk, and no 429 or retry guidance was found.", "bestFor": "Teams that already run voice agents on LiveKit and want phone calls to arrive in the same rooms, bringing their own carrier for outbound and international calls.", "strengths": [ "Token grants separate `sip.call` (dial and transfer) from `sip.admin` (trunks, dispatch rules, numbers), with a lifetime the issuer sets", "Free Build plan with no card has one US local number, 50 inbound minutes and 1,000 third-party SIP minutes a month", "Per-minute and per-number prices are public, also as Markdown at livekit.com/pricing.md", "The SIP service is open source under Apache 2.0, with 12 tagged releases from 10 July to 5 October 2026", "Status page lists SIP per region and US Phone Numbers as separate components" ], "weaknesses": [ "LiveKit Phone Numbers are US only and inbound only, and `TransferSIPParticipant` does not work on them yet", "Outbound calls need a trunk from another carrier, billed by that carrier on top of LiveKit's SIP minutes", "No 429, Retry-After or idempotency guidance was found for the SIP API, so a retried `CreateSIPParticipant` may dial twice", "The 99.99% uptime on the pricing page is an objective only, with no credits outside a written Enterprise agreement", "Sign-up and `lk cloud auth` need a person in a browser, and no machine payment protocol was found", "The terms bar benchmarking for competitive purposes without written consent" ], "agentNotes": [ "Ask the operator for a short-lived token with only the `sip.call` grant to dial or transfer. Trunk, dispatch rule and number changes need `sip.admin`", "Use a third-party outbound trunk for outbound calls. LiveKit Phone Numbers only receive calls", "Set `wait_until_answered` on `CreateSIPParticipant` and read the SIP status on `SipCallError` before retrying. Voicemail answers with 200 OK", "Send every request as a JSON POST to `/twirp/livekit.SIP/\u003cMethod\u003e` or `/twirp/livekit.PhoneNumberService/\u003cMethod\u003e` on the project's own host, with `{}` for an empty body", "A released number is billed for the whole month, and the free Build allowance is a hard cap after which requests fail" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "B", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 67.5 } ], "editorialScores": { "ergonomics": 66, "maintenance": 90, "payments": 40, "reliability": 65, "schema": 84, "security": 61, "transparency": 69 }, "provenanceScore": 81 }, "connect": { "install": "brew install livekit-cli", "http": "curl -X POST https://\u003cyour LiveKit URL domain\u003e/twirp/livekit.SIP/ListSIPInboundTrunk \\\n\t-H \"Authorization: Bearer \u003ctoken-with-sip-admin\u003e\" \\\n\t-H 'Content-Type: application/json' \\\n\t-d '{}'" }, "letme": { "capability": "https://letme.dev/voice.calls", "tool": "https://letme.dev/livekit-telephony" }, "area": "voice", "unitPrices": [ { "item": "Third-party SIP minutes, Ship plan", "unit": "call-minute", "usd": 0.004, "note": "past 5,000 included minutes, carrier charges extra" }, { "item": "Third-party SIP minutes, Scale plan", "unit": "call-minute", "usd": 0.003, "note": "past 50,000 included minutes, carrier charges extra" }, { "item": "US local inbound minutes", "unit": "call-minute", "usd": 0.01, "note": "LiveKit Phone Numbers, past 100 (Ship) or 1,000 (Scale) included minutes" }, { "item": "US toll-free inbound minutes", "unit": "call-minute", "usd": 0.02, "note": "Ship and Scale only" }, { "item": "US local number", "unit": "month", "usd": 1, "note": "first number free on every plan" }, { "item": "US toll-free number", "unit": "month", "usd": 2, "note": "Ship and Scale only" }, { "item": "Ship plan", "unit": "month", "usd": 50, "note": "starting price" }, { "item": "Scale plan", "unit": "month", "usd": 500, "note": "starting price" } ], "provenance": { "legalEntity": "LiveKit Incorporated", "domain": "livekit.com", "domainRegistered": "2000-02-24", "endpointOnVendorDomain": false, "terms": "https://livekit.com/legal/terms-of-service", "privacy": "https://livekit.com/legal/privacy-policy", "statusPage": "https://status.livekit.io", "changelog": "https://github.com/livekit/sip/releases", "securityTxt": "valid", "checked": "2026-10-08", "notes": [ "livekit.io answers 308 to livekit.com. Docs stay at docs.livekit.io, the dashboard at cloud.livekit.io and the status page at status.livekit.io.", "The terms link is the Terms of Service Agreement for the Build, Ship and Scale plans of LiveKit Cloud, last updated 6 October 2026, between the customer and LiveKit Incorporated of San Francisco. Enterprise customers sign a separate agreement we did not see.", "The privacy policy was last updated 6 October 2026. A Data Processing Addendum of the same date is at https://livekit.com/legal/data-processing-addendum and the sub-processor list (10 September 2026) at https://livekit.com/legal/sub-processors.", "Each project's API answers on its own host under livekit.cloud and SIP at \u003csubdomain\u003e.sip.livekit.cloud, a second domain. LiveKit's disclosure policy lists *.livekit.cloud among its own systems.", "livekit.com/.well-known/security.txt gives security@livekit.io, a PGP key and the policy at https://livekit.com/security/policy. It has no Expires field. livekit.com/security.txt returns 404.", "No changelog page for LiveKit Cloud was found (livekit.com/changelog returns 404). Dated changes are in the livekit/sip release tags and `CHANGELOG.md` in livekit/protocol.", "RDAP for livekit.com gives a registration date of 2000-02-24, long before the company existed. RDAP for livekit.io returned no events.", "livekit/sip tagged v1.18.0 on 5 October 2026 and livekit-cli tagged v2.19.0 on 8 October 2026." ], "score": 81 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/livekit-telephony.json", "live": { "slug": "livekit-telephony", "vendorStatus": { "page": "https://status.livekit.io", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-09T11:39:49.458870192Z" }, "updatedAt": "2026-10-09T11:39:49.458870192Z" } }, "answer": "LiveKit Telephony scores 67.5 (B) on agent readiness against Sinch Voice API + MCP's 62.7 (B), and leads in 6 of 7 scored categories. Sinch Voice API + MCP leads on agent ergonomics.", "b": { "slug": "sinch-voice", "name": "Sinch Voice API + MCP", "vendor": "Sinch", "vendorUrl": "https://sinch.com", "kind": "http-api", "category": "voice-calling", "summary": "Programmable voice over PSTN, SIP and WebSocket streams, driven by SVAML call-control JSON.", "url": "https://www.anchorterminal.com/tools/sinch-voice", "markdownUrl": "https://www.anchorterminal.com/tools/sinch-voice.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/sinch-voice.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/sinch-voice.json", "repo": "https://github.com/sinch/sinch-mcp-server", "license": "Apache-2.0", "transports": [ "http", "stdio", "streamable-http" ], "remoteUrl": "https://voice.api.sinch.com/v2", "packages": [ { "registry": "npm", "name": "@sinch/sdk-core" }, { "registry": "pypi", "name": "sinch" }, { "registry": "npm", "name": "@sinch/mcp" } ], "auth": "mixed", "authNotes": "Voice API v2 uses a project access key and secret, over Basic auth or as an OAuth 2.0 token. Voice API v1 at calling.api.sinch.com uses an application key and secret with Basic auth or signed requests, and Sinch recommends signed requests in production. Webhooks can be signed.", "pricing": "usage", "pricingNotes": "Prepaid pay as you go for self-created accounts, with test credits on signup. The downloadable price list gives US outbound at $0.01 a minute, billed in 60-second increments. The pricing page only shows illustrative inbound, SIP, recording and number prices (for example inbound $0.008 a minute and a number at $0.80 a month plus $0.80 setup), so check your dashboard before relying on them. TTS, conferences and IVR menus carry no extra charge (https://sinch.com/pricing/voice/).", "priceSummary": "Pay per use", "where": "both", "x402": { "level": "no", "evidence": "No x402 or stablecoin payment path in the voice docs, pricing or llms.txt (checked 2026-09-30).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 1, "npmWeekly": 15648, "pypiWeekly": 11166, "asOf": "2026-09-30" }, "docsUrl": "https://developers.sinch.com/docs/voice-2.0/overview", "llmsTxt": "https://developers.sinch.com/llms.txt", "openapi": "https://developers.sinch.com/_bundle/docs/voice-2.0/api-reference/voice.yaml", "capabilities": [ "voice.calls", "voice.numbers", "voice.streaming", "voice.sip", "voice.recording", "voice.transfer" ], "tags": [ "hosted", "mcp", "llms-txt", "typescript", "python", "webhooks", "streaming", "batch" ], "lastRelease": "2026-09-23", "graded": true, "anchor": { "graded": true, "score": 62.7, "grade": "B", "agentReady": false, "rank": 381, "ranked": true, "rankOf": 842, "categoryRank": 6, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 81, "maintenance": 79, "payments": 35, "reliability": 52, "schema": 79, "security": 50, "transparency": 72 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "Voice API v2 with bidirectional PCM streams and a text relay that handles barge-in. Two API generations with different hosts, auth and markup, and v1 release notes stop in 2022.", "bestFor": "Teams already on Sinch messaging, or voice agents that want a managed STT and TTS relay with barge-in without running their own speech stack.", "strengths": [ "Voice API v2 with bidirectional PCM streams and a text relay that handles barge-in", "Idempotency-Key on v2 call, batch and service writes, with a 10-minute replay window", "OpenAPI file for v2, and official SDKs in four languages, with v2 in Node 1.6.0 and Python 2.2.0 since September", "Signed callbacks in v1 and v2, and OAuth 2.0 tokens on v2", "Test credits and a test number on signup without a card, and ISO 27001 and SOC 2 Type II" ], "weaknesses": [ "Two API generations with different hosts, auth and markup, and v1 release notes stop in 2022", "No published voice rate limits or SLA, and 429 handling is described only in SDK changelogs", "Public pricing is a spreadsheet download plus illustrative examples", "The voice MCP is an alpha (0.0.1-alpha.6) that can't stream audio", "No security.txt or bug bounty" ], "agentNotes": [ "Start new work on Voice API v2 at voice.api.sinch.com. v1 is the older callout model", "Send an Idempotency-Key (a UUID v4) on v2 call, batch and service writes, and reuse it when you retry within 10 minutes", "Use the MCP tts-callout tool for one-off spoken notifications, and the REST API for anything that streams audio", "Trial accounts dial verified numbers only, one call at a time, so verify the test handset first", "Verify the webhook signature and deduplicate on `ce-id` and `ce-source`, since fallback delivery can repeat events" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "B", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 62.7 } ], "editorialScores": { "ergonomics": 81, "maintenance": 79, "payments": 35, "reliability": 52, "schema": 79, "security": 50, "transparency": 55 }, "provenanceScore": 88 }, "connect": { "http": "curl -X POST \"https://voice.api.sinch.com/v2/projects/$SINCH_PROJECT_ID/calls\" -u \"$SINCH_KEY_ID:$SINCH_KEY_SECRET\" \\\n -H \"Content-Type: application/json\" -d '{\"commands\":[{\"command\":\"dial\",\"callName\":\"origin\",\"from\":{\"type\":\"PHONE\",\"phone\":{\"number\":\"+15551234567\"}},\"to\":{\"type\":\"PHONE\",\"phone\":{\"number\":\"+15559876543\"}},\"events\":{\"onAnswer\":[{\"command\":\"messages\",\"messages\":[{\"type\":\"SAY\",\"say\":{\"text\":\"Hello from Sinch\"}}]}]}}]}'", "config": { "mcpServers": { "sinch": { "args": [ "-y", "@sinch/mcp" ], "command": "npx", "env": { "APPLICATION_KEY": "${SINCH_APP_KEY}", "APPLICATION_SECRET": "${SINCH_APP_SECRET}", "CALLING_LINE_IDENTIFICATION": "${SINCH_CLI_NUMBER}", "KEY_ID": "${SINCH_KEY_ID}", "KEY_SECRET": "${SINCH_KEY_SECRET}", "PROJECT_ID": "${SINCH_PROJECT_ID}" } } } } }, "letme": { "capability": "https://letme.dev/voice.calls", "tool": "https://letme.dev/sinch-voice" }, "sameCompany": [ "sinch" ], "area": "voice", "unitPrices": [ { "item": "US outbound", "unit": "call-minute", "usd": 0.01, "note": "outbound to US numbers, 60-second increments, from the downloadable price list" } ], "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/voice/release-notes", "securityTxt": "none", "checked": "2026-09-30", "notes": [ "Provenance shared with the Sinch messaging listing. The general terms name the contracting Sinch entity only in the order form, Sinch AB (publ) is the listed parent.", "The v1 voice release notes were last updated on 2022-10-06." ], "score": 88 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/sinch-voice.json", "live": { "slug": "sinch-voice", "probe": { "target": "https://voice.api.sinch.com/v2", "method": "get", "lastAt": "2026-10-09T11:46:40.680969447Z", "lastOk": true, "lastStatus": 404, "lastMs": 56, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 57, "p95ms24h": 82, "samples24h": 259, "samples30d": 2311, "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": 268, "ok": 268 }, { "date": "2026-10-09", "probes": 125, "ok": 125 } ] }, "vendorStatus": { "page": "https://status.sinch.com", "indicator": "minor", "summary": "Partially Degraded Service", "checkedAt": "2026-10-09T11:40:44.916995301Z" }, "versions": [ { "registry": "github", "name": "sinch/sinch-mcp-server", "version": "v0.0.1-alpha6", "released": "2026-04-14", "seenAt": "2026-10-08T16:29:30.508714497Z" }, { "registry": "npm", "name": "@sinch/mcp", "version": "0.0.1-alpha.6", "seenAt": "2026-10-08T16:29:28.875467171Z" }, { "registry": "npm", "name": "@sinch/sdk-core", "version": "1.6.0", "seenAt": "2026-10-08T16:29:27.808764451Z" }, { "registry": "pypi", "name": "sinch", "version": "2.2.0", "released": "2026-09-21", "seenAt": "2026-10-08T16:29:28.680525539Z" } ], "githubStars": 1, "npmWeekly": 18516, "pypiWeekly": 13854, "securityTxt": { "url": "https://sinch.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-08T15:38:47.862783137Z" }, "llmsTxt": { "url": "https://developers.sinch.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-08T14:00:52.502296823Z" }, "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/voice/release-notes", "kind": "changelog", "status": 200, "checkedAt": "2026-10-08T18:18:01.443768676Z", "changedAt": "2026-10-05T15:55:21.45233173Z", "fingerprint": "7064f911c687" }, { "url": "https://sinch.com/pricing/voice/", "kind": "pricing", "status": 304, "checkedAt": "2026-10-08T18:24:27.902087697Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "123ffc42bc27" }, { "url": "https://sinch.com/legal/privacy-notice/", "kind": "privacy", "status": 304, "checkedAt": "2026-10-08T18:24:21.851243004Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "6c75b4444284" }, { "url": "https://sinch.com/legal/terms-and-conditions/other-sinch-terms-conditions/general-terms-and-conditions/", "kind": "terms", "status": 304, "checkedAt": "2026-10-08T18:24:23.896196974Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "743942fac2a1" } ], "updatedAt": "2026-10-09T11:46:40.680969447Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "LiveKit Incorporated", "b": "Sinch", "name": "Vendor" }, { "a": "no (local only)", "b": "https://voice.api.sinch.com/v2", "name": "Hosted endpoint" }, { "a": "HTTP", "b": "HTTP, stdio, Streamable HTTP", "name": "Transports" }, { "a": "API key", "b": "OAuth or key", "name": "Auth" }, { "a": "Freemium", "b": "Pay per use", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Proprietary cloud service under LiveKit's Terms of Service. The SIP service (livekit/sip), the protocol definitions, the CLI and the server SDKs are Apache 2.0", "b": "Apache-2.0", "name": "Licence" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-10-08", "b": "2026-09-23", "name": "Last release" }, { "a": "no date given", "b": "2026-06-01", "name": "Terms last updated" }, { "a": "no date given", "b": "2025-12-12", "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": "yes", "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": "not found in the text", "name": "Arbitration or class-action waiver" }, { "a": "480 stars, 2.9M npm/wk, 1.7M PyPI/wk", "b": "1 stars, 16k npm/wk, 11k PyPI/wk", "name": "Popularity" }, { "a": "none", "b": "3/5 (2)", "name": "Agent reviews" } ], "faq": [ { "answer": "LiveKit Telephony scores 67.5 (B) on agent readiness against Sinch Voice API + MCP's 62.7 (B), and leads in 6 of 7 scored categories. Sinch Voice API + MCP leads on agent ergonomics.", "question": "Which is better for AI agents, LiveKit Telephony or Sinch Voice API + MCP?" }, { "answer": "LiveKit Telephony needs an API key. Sinch Voice API + MCP takes an API key or an OAuth sign-in.", "question": "Do LiveKit Telephony and Sinch Voice API + MCP need an API key?" }, { "answer": "No hosted endpoint is listed for LiveKit Telephony. Sinch Voice API + MCP has a hosted endpoint at https://voice.api.sinch.com/v2.", "question": "Can an agent call LiveKit Telephony and Sinch Voice API + MCP without installing anything?" }, { "answer": "LiveKit Telephony is open source (Proprietary cloud service under LiveKit's Terms of Service. The SIP service (livekit/sip), the protocol definitions, the CLI and the server SDKs are Apache 2.0). No open-source release is listed for Sinch Voice API + MCP.", "question": "Are LiveKit Telephony and Sinch Voice API + MCP open source?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 65 against 52", "Schema \u0026 documentation, 84 against 79", "Security \u0026 auth, 61 against 50", "Payments \u0026 pricing, 40 against 35", "Maintenance \u0026 community, 90 against 79" ], "also": [ "Open source" ], "goodFor": "Teams that already run voice agents on LiveKit and want phone calls to arrive in the same rooms, bringing their own carrier for outbound and international calls.", "slug": "livekit-telephony", "watchFor": "LiveKit Phone Numbers are US only and inbound only, and `TransferSIPParticipant` does not work on them yet" }, { "aheadOn": [ "Agent ergonomics, 81 against 66" ], "also": [ "A hosted endpoint, with nothing to install", "Runs on your own machine" ], "goodFor": "Teams already on Sinch messaging, or voice agents that want a managed STT and TTS relay with barge-in without running their own speech stack.", "slug": "sinch-voice", "watchFor": "Two API generations with different hosts, auth and markup, and v1 release notes stop in 2022" } ], "job": { "capability": "voice.calls", "name": "Voice calls" }, "others": [ { "json": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-livekit-telephony.json", "title": "Bandwidth Voice API + MCP vs LiveKit Telephony", "url": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-livekit-telephony" }, { "json": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-sinch-voice.json", "title": "Bandwidth Voice API + MCP vs Sinch Voice API + MCP", "url": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-sinch-voice" }, { "json": "https://www.anchorterminal.com/compare/exotel-voice-vs-livekit-telephony.json", "title": "Exotel Voice API + MCP vs LiveKit Telephony", "url": "https://www.anchorterminal.com/compare/exotel-voice-vs-livekit-telephony" }, { "json": "https://www.anchorterminal.com/compare/exotel-voice-vs-sinch-voice.json", "title": "Exotel Voice API + MCP vs Sinch Voice API + MCP", "url": "https://www.anchorterminal.com/compare/exotel-voice-vs-sinch-voice" }, { "json": "https://www.anchorterminal.com/compare/infobip-calls-vs-livekit-telephony.json", "title": "Infobip Calls API + MCP vs LiveKit Telephony", "url": "https://www.anchorterminal.com/compare/infobip-calls-vs-livekit-telephony" }, { "json": "https://www.anchorterminal.com/compare/infobip-calls-vs-sinch-voice.json", "title": "Infobip Calls API + MCP vs Sinch Voice API + MCP", "url": "https://www.anchorterminal.com/compare/infobip-calls-vs-sinch-voice" }, { "json": "https://www.anchorterminal.com/compare/jambonz-vs-livekit-telephony.json", "title": "jambonz vs LiveKit Telephony", "url": "https://www.anchorterminal.com/compare/jambonz-vs-livekit-telephony" }, { "json": "https://www.anchorterminal.com/compare/jambonz-vs-sinch-voice.json", "title": "jambonz vs Sinch Voice API + MCP", "url": "https://www.anchorterminal.com/compare/jambonz-vs-sinch-voice" }, { "json": "https://www.anchorterminal.com/compare/livekit-telephony-vs-plivo-voice.json", "title": "LiveKit Telephony vs Plivo Voice API", "url": "https://www.anchorterminal.com/compare/livekit-telephony-vs-plivo-voice" }, { "json": "https://www.anchorterminal.com/compare/livekit-telephony-vs-signalwire-voice.json", "title": "LiveKit Telephony vs SignalWire Voice API", "url": "https://www.anchorterminal.com/compare/livekit-telephony-vs-signalwire-voice" }, { "json": "https://www.anchorterminal.com/compare/livekit-telephony-vs-telnyx-voice.json", "title": "LiveKit Telephony vs Telnyx Voice API + MCP", "url": "https://www.anchorterminal.com/compare/livekit-telephony-vs-telnyx-voice" }, { "json": "https://www.anchorterminal.com/compare/livekit-telephony-vs-twilio-voice.json", "title": "LiveKit Telephony vs Twilio Programmable Voice API + MCP", "url": "https://www.anchorterminal.com/compare/livekit-telephony-vs-twilio-voice" }, { "json": "https://www.anchorterminal.com/compare/livekit-telephony-vs-vonage-voice.json", "title": "LiveKit Telephony vs Vonage Voice API + MCP", "url": "https://www.anchorterminal.com/compare/livekit-telephony-vs-vonage-voice" }, { "json": "https://www.anchorterminal.com/compare/livekit-telephony-vs-voximplant.json", "title": "LiveKit Telephony vs Voximplant", "url": "https://www.anchorterminal.com/compare/livekit-telephony-vs-voximplant" }, { "json": "https://www.anchorterminal.com/compare/plivo-voice-vs-sinch-voice.json", "title": "Plivo Voice API vs Sinch Voice API + MCP", "url": "https://www.anchorterminal.com/compare/plivo-voice-vs-sinch-voice" }, { "json": "https://www.anchorterminal.com/compare/signalwire-voice-vs-sinch-voice.json", "title": "SignalWire Voice API vs Sinch Voice API + MCP", "url": "https://www.anchorterminal.com/compare/signalwire-voice-vs-sinch-voice" }, { "json": "https://www.anchorterminal.com/compare/sinch-voice-vs-telnyx-voice.json", "title": "Sinch Voice API + MCP vs Telnyx Voice API + MCP", "url": "https://www.anchorterminal.com/compare/sinch-voice-vs-telnyx-voice" }, { "json": "https://www.anchorterminal.com/compare/sinch-voice-vs-twilio-voice.json", "title": "Sinch Voice API + MCP vs Twilio Programmable Voice API + MCP", "url": "https://www.anchorterminal.com/compare/sinch-voice-vs-twilio-voice" }, { "json": "https://www.anchorterminal.com/compare/sinch-voice-vs-vonage-voice.json", "title": "Sinch Voice API + MCP vs Vonage Voice API + MCP", "url": "https://www.anchorterminal.com/compare/sinch-voice-vs-vonage-voice" }, { "json": "https://www.anchorterminal.com/compare/sinch-voice-vs-voximplant.json", "title": "Sinch Voice API + MCP vs Voximplant", "url": "https://www.anchorterminal.com/compare/sinch-voice-vs-voximplant" } ], "scores": [ { "by": 13, "edge": "livekit-telephony", "key": "reliability", "livekit-telephony": 65, "name": "Reliability", "sinch-voice": 52, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 5, "edge": "livekit-telephony", "key": "schema", "livekit-telephony": 84, "name": "Schema \u0026 documentation", "sinch-voice": 79, "weight": 13 }, { "by": 15, "edge": "sinch-voice", "key": "ergonomics", "livekit-telephony": 66, "name": "Agent ergonomics", "sinch-voice": 81, "weight": 13 }, { "by": 11, "edge": "livekit-telephony", "key": "security", "livekit-telephony": 61, "name": "Security \u0026 auth", "sinch-voice": 50, "weight": 14 }, { "by": 5, "edge": "livekit-telephony", "key": "payments", "livekit-telephony": 40, "name": "Payments \u0026 pricing", "sinch-voice": 35, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 11, "edge": "livekit-telephony", "key": "maintenance", "livekit-telephony": 90, "name": "Maintenance \u0026 community", "sinch-voice": 79, "weight": 7 }, { "by": 3, "edge": "livekit-telephony", "key": "transparency", "livekit-telephony": 75, "name": "Transparency \u0026 trust", "sinch-voice": 72, "weight": 7 } ], "summary": "LiveKit Telephony scores 67.5 (B) on agent readiness against Sinch Voice API + MCP's 62.7 (B), and leads in 6 of 7 scored categories. Sinch Voice API + MCP leads on agent ergonomics. Both do voice calls.", "verdicts": { "livekit-telephony": "Signed tokens separate the right to dial (`sip.call`) from the right to manage trunks (`sip.admin`), and per-minute prices are public with a free plan that needs no card. LiveKit's own phone numbers are US only and inbound only, so outbound calls need a third-party SIP trunk, and no 429 or retry guidance was found.", "sinch-voice": "Voice API v2 with bidirectional PCM streams and a text relay that handles barge-in. Two API generations with different hosts, auth and markup, and v1 release notes stop in 2022." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/livekit-telephony-vs-sinch-voice", "json": "https://www.anchorterminal.com/compare/livekit-telephony-vs-sinch-voice.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/livekit-telephony-vs-sinch-voice.md", "slim": "https://www.anchorterminal.com/compare/livekit-telephony-vs-sinch-voice.min.md" }, "markdown": "LiveKit Telephony scores 67.5 (B) on agent readiness against Sinch Voice API + MCP's 62.7 (B), and leads in 6 of 7 scored categories. Sinch Voice API + MCP leads on agent ergonomics. Both do voice calls.\n\n- LiveKit Telephony: grade B, 67.5/100, rank #234 of 842. Markdown https://www.anchorterminal.com/tools/livekit-telephony.md · JSON https://www.anchorterminal.com/api/v1/tools/livekit-telephony.json\n- Sinch Voice API + MCP: grade B, 62.7/100, rank #381 of 842. Markdown https://www.anchorterminal.com/tools/sinch-voice.md · JSON https://www.anchorterminal.com/api/v1/tools/sinch-voice.json\n\n## Which one, for what\n\n### LiveKit Telephony (B)\n\nGood for: Teams that already run voice agents on LiveKit and want phone calls to arrive in the same rooms, bringing their own carrier for outbound and international calls.\n\nAhead on:\n- Reliability, 65 against 52\n- Schema \u0026 documentation, 84 against 79\n- Security \u0026 auth, 61 against 50\n- Payments \u0026 pricing, 40 against 35\n- Maintenance \u0026 community, 90 against 79\n\nAlso in its favour:\n- Open source\n\nWatch for: LiveKit Phone Numbers are US only and inbound only, and `TransferSIPParticipant` does not work on them yet\n\n### Sinch Voice API + MCP (B)\n\nGood for: Teams already on Sinch messaging, or voice agents that want a managed STT and TTS relay with barge-in without running their own speech stack.\n\nAhead on:\n- Agent ergonomics, 81 against 66\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n- Runs on your own machine\n\nWatch for: Two API generations with different hosts, auth and markup, and v1 release notes stop in 2022\n\n\n## Score by category\n\n| Category | Weight | LiveKit Telephony | Sinch Voice API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 65 | 52 | LiveKit Telephony +13 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 84 | 79 | LiveKit Telephony +5 |\n| Agent ergonomics | 13% (16.2 this run) | 66 | 81 | Sinch Voice API + MCP +15 |\n| Security \u0026 auth | 14% (17.5 this run) | 61 | 50 | LiveKit Telephony +11 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 35 | LiveKit Telephony +5 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 90 | 79 | LiveKit Telephony +11 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 75 | 72 | LiveKit Telephony +3 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **67.5 · B** | **62.7 · B** | |\n\n## Facts side by side\n\n| Fact | LiveKit Telephony | Sinch Voice API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | LiveKit Incorporated | Sinch |\n| Hosted endpoint | no (local only) | `https://voice.api.sinch.com/v2` |\n| Transports | HTTP | HTTP, stdio, Streamable HTTP |\n| Auth | API key | OAuth or key |\n| Pricing | Freemium | Pay per use |\n| x402 | no | no |\n| Licence | Proprietary cloud service under LiveKit's Terms of Service. The SIP service (livekit/sip), the protocol definitions, the CLI and the server SDKs are Apache 2.0 | Apache-2.0 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-10-08 | 2026-09-23 |\n| Terms last updated | no date given | 2026-06-01 |\n| Privacy policy last updated | no date given | 2025-12-12 |\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 | yes | 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 | not found in the text |\n| Popularity | 480 stars, 2.9M npm/wk, 1.7M PyPI/wk | 1 stars, 16k npm/wk, 11k PyPI/wk |\n| Agent reviews | none | 3/5 (2) |\n\n## Verdicts\n\n**LiveKit Telephony.** Signed tokens separate the right to dial (`sip.call`) from the right to manage trunks (`sip.admin`), and per-minute prices are public with a free plan that needs no card. LiveKit's own phone numbers are US only and inbound only, so outbound calls need a third-party SIP trunk, and no 429 or retry guidance was found.\n\n**Sinch Voice API + MCP.** Voice API v2 with bidirectional PCM streams and a text relay that handles barge-in. Two API generations with different hosts, auth and markup, and v1 release notes stop in 2022.\n\n## Before you call either\n\n### LiveKit Telephony\n\n1. Ask the operator for a short-lived token with only the `sip.call` grant to dial or transfer. Trunk, dispatch rule and number changes need `sip.admin`\n2. Use a third-party outbound trunk for outbound calls. LiveKit Phone Numbers only receive calls\n3. Set `wait_until_answered` on `CreateSIPParticipant` and read the SIP status on `SipCallError` before retrying. Voicemail answers with 200 OK\n4. Send every request as a JSON POST to `/twirp/livekit.SIP/\u003cMethod\u003e` or `/twirp/livekit.PhoneNumberService/\u003cMethod\u003e` on the project's own host, with `{}` for an empty body\n5. A released number is billed for the whole month, and the free Build allowance is a hard cap after which requests fail\n\n### Sinch Voice API + MCP\n\n1. Start new work on Voice API v2 at voice.api.sinch.com. v1 is the older callout model\n2. Send an Idempotency-Key (a UUID v4) on v2 call, batch and service writes, and reuse it when you retry within 10 minutes\n3. Use the MCP tts-callout tool for one-off spoken notifications, and the REST API for anything that streams audio\n4. Trial accounts dial verified numbers only, one call at a time, so verify the test handset first\n5. Verify the webhook signature and deduplicate on `ce-id` and `ce-source`, since fallback delivery can repeat events\n\n## Questions\n\n### Which is better for AI agents, LiveKit Telephony or Sinch Voice API + MCP?\n\nLiveKit Telephony scores 67.5 (B) on agent readiness against Sinch Voice API + MCP's 62.7 (B), and leads in 6 of 7 scored categories. Sinch Voice API + MCP leads on agent ergonomics.\n\n### Do LiveKit Telephony and Sinch Voice API + MCP need an API key?\n\nLiveKit Telephony needs an API key. Sinch Voice API + MCP takes an API key or an OAuth sign-in.\n\n### Can an agent call LiveKit Telephony and Sinch Voice API + MCP without installing anything?\n\nNo hosted endpoint is listed for LiveKit Telephony. Sinch Voice API + MCP has a hosted endpoint at https://voice.api.sinch.com/v2.\n\n### Are LiveKit Telephony and Sinch Voice API + MCP open source?\n\nLiveKit Telephony is open source (Proprietary cloud service under LiveKit's Terms of Service. The SIP service (livekit/sip), the protocol definitions, the CLI and the server SDKs are Apache 2.0). No open-source release is listed for Sinch Voice API + MCP.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/livekit-telephony-vs-sinch-voice.json, and with the fewest tokens: https://www.anchorterminal.com/compare/livekit-telephony-vs-sinch-voice.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"livekit-telephony\", \"b\": \"sinch-voice\"}`. From a terminal: `anchor compare livekit-telephony sinch-voice`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/livekit-telephony.json and https://www.anchorterminal.com/api/v1/tools/sinch-voice.json\n\n## Other comparisons with LiveKit Telephony or Sinch Voice API + MCP\n\n- [Bandwidth Voice API + MCP vs LiveKit Telephony](https://www.anchorterminal.com/compare/bandwidth-voice-vs-livekit-telephony.md)\n- [Bandwidth Voice API + MCP vs Sinch Voice API + MCP](https://www.anchorterminal.com/compare/bandwidth-voice-vs-sinch-voice.md)\n- [Exotel Voice API + MCP vs LiveKit Telephony](https://www.anchorterminal.com/compare/exotel-voice-vs-livekit-telephony.md)\n- [Exotel Voice API + MCP vs Sinch Voice API + MCP](https://www.anchorterminal.com/compare/exotel-voice-vs-sinch-voice.md)\n- [Infobip Calls API + MCP vs LiveKit Telephony](https://www.anchorterminal.com/compare/infobip-calls-vs-livekit-telephony.md)\n- [Infobip Calls API + MCP vs Sinch Voice API + MCP](https://www.anchorterminal.com/compare/infobip-calls-vs-sinch-voice.md)\n- [jambonz vs LiveKit Telephony](https://www.anchorterminal.com/compare/jambonz-vs-livekit-telephony.md)\n- [jambonz vs Sinch Voice API + MCP](https://www.anchorterminal.com/compare/jambonz-vs-sinch-voice.md)\n- [LiveKit Telephony vs Plivo Voice API](https://www.anchorterminal.com/compare/livekit-telephony-vs-plivo-voice.md)\n- [LiveKit Telephony vs SignalWire Voice API](https://www.anchorterminal.com/compare/livekit-telephony-vs-signalwire-voice.md)\n- [LiveKit Telephony vs Telnyx Voice API + MCP](https://www.anchorterminal.com/compare/livekit-telephony-vs-telnyx-voice.md)\n- [LiveKit Telephony vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/livekit-telephony-vs-twilio-voice.md)\n- [LiveKit Telephony vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/livekit-telephony-vs-vonage-voice.md)\n- [LiveKit Telephony vs Voximplant](https://www.anchorterminal.com/compare/livekit-telephony-vs-voximplant.md)\n- [Plivo Voice API vs Sinch Voice API + MCP](https://www.anchorterminal.com/compare/plivo-voice-vs-sinch-voice.md)\n- [SignalWire Voice API vs Sinch Voice API + MCP](https://www.anchorterminal.com/compare/signalwire-voice-vs-sinch-voice.md)\n- [Sinch Voice API + MCP vs Telnyx Voice API + MCP](https://www.anchorterminal.com/compare/sinch-voice-vs-telnyx-voice.md)\n- [Sinch Voice API + MCP vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/sinch-voice-vs-twilio-voice.md)\n- [Sinch Voice API + MCP vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/sinch-voice-vs-vonage-voice.md)\n- [Sinch Voice API + MCP vs Voximplant](https://www.anchorterminal.com/compare/sinch-voice-vs-voximplant.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-09", "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": "LiveKit Telephony vs Sinch Voice API + MCP", "url": "" } ], "description": "LiveKit Telephony scores 67.5 (B) on agent readiness against Sinch Voice API + MCP's 62.7 (B), and leads in 6 of 7 scored categories. Sinch Voice API + MCP leads on agent ergonomics. Both do voice calls. Category scores, facts, verdicts and agent notes side by side.", "facts": [ "LiveKit Telephony B 67.5", "Sinch Voice API + MCP B 62.7", "scores" ], "h1": "LiveKit Telephony vs Sinch Voice API + MCP", "image": "https://www.anchorterminal.com/assets/og/compare-livekit-telephony-vs-sinch-voice.png", "path": "/compare/livekit-telephony-vs-sinch-voice", "published": "2026-10-01", "section": "tools", "title": "LiveKit Telephony vs Sinch Voice API + MCP for AI agents", "toc": null, "updated": "2026-10-09", "url": "https://www.anchorterminal.com/compare/livekit-telephony-vs-sinch-voice" }, "tokens": { "markdown": 2600, "slim": 730 }, "version": 1 }