{ "data": { "a": { "slug": "jambonz", "name": "jambonz", "vendor": "FirstFive8, Inc.", "vendorUrl": "https://jambonz.org", "kind": "http-api", "category": "voice-calling", "summary": "jambonz is a programmable voice platform from FirstFive8 for calls over a customer's own SIP carriers. Applications control calls through a REST API, webhooks or a WebSocket API, on the hosted jambonz.cloud or a self-hosted cluster under a commercial licence.", "url": "https://www.anchorterminal.com/tools/jambonz", "markdownUrl": "https://www.anchorterminal.com/tools/jambonz.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/jambonz.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/jambonz.json", "repo": "https://github.com/jambonz/jambonz-feature-server", "license": "Proprietary. jambonz.cloud is under the jambonz Terms of Use and self-hosted jambonz Commercial needs a paid licence key. The API server, feature server and SDK repositories on GitHub are MIT", "transports": [ "http" ], "packages": [ { "registry": "npm", "name": "@jambonz/sdk" }, { "registry": "pypi", "name": "jambonz-python-sdk" }, { "registry": "npm", "name": "@jambonz/mcp-schema-server" } ], "auth": "api-key", "authNotes": "A bearer token sent as `Authorization: Bearer \u003ctoken\u003e`, created in the jambonz.cloud portal or with `POST /ApiKeys` by an existing token. A token belongs to one account or one service provider and reaches everything that owner can. No scopes or read-only keys were found. Access is self-serve after a browser sign-up with email, Google or GitHub. Webhooks to the application are signed with a `Jambonz-Signature` header on the hosted platform, or protected with HTTP basic authentication.", "pricing": "paid", "pricingNotes": "jambonz.cloud costs $8 a concurrent session a month for 5 to 249 sessions, $6 for 250 to 499 and $5 for 500 or more, with no per-minute charge. A three-week trial comes first, and the terms describe choosing a subscription at its end. Self-hosted licences cost $7 a session a month or $2,000 a month for unlimited sessions on one cluster, after a 30-day trial of 10 sessions. Carrier minutes, phone numbers, speech and LLM usage are bought from other vendors. Air-gapped, OEM and Enterprise support prices are by quote (https://jambonz.org/pricing, checked 2026-10-08).", "priceSummary": "$8 / mo", "where": "local", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs index, the three OpenAPI files or the pricing page (checked 2026-10-08).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 103, "npmWeekly": 1368, "pypiWeekly": 420, "asOf": "2026-10-08" }, "docsUrl": "https://docs.jambonz.org", "llmsTxt": "https://docs.jambonz.org/llms.txt", "openapi": "https://docs.jambonz.org/openapi/rest-call-control.json", "capabilities": [ "voice.calls", "voice.sip", "voice.streaming", "voice.recording", "voice.agent" ], "tags": [ "hosted", "self-hosted", "sip", "webrtc", "open-source", "openapi", "llms-txt", "typescript", "python", "webhooks", "websocket", "free-trial" ], "lastRelease": "2026-10-04", "graded": true, "anchor": { "graded": true, "score": 49.2, "grade": "D", "agentReady": false, "rank": 712, "ranked": true, "rankOf": 842, "categoryRank": 11, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 54, "maintenance": 78, "payments": 40, "reliability": 36, "schema": 78, "security": 42, "transparency": 50 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": -3, "negativeNotes": [ "24 September 2026, fixed and documented. The 11.1.5 release notes list API server flaws found in a security review, among them privilege escalation in user management, accounts able to write operator-only fields and limits, and a call-logs route that could read arbitrary CloudWatch log groups. The 11.0.0 notes of 8 July 2026 also mention cross-account authorisation hardening. No advisory or CVE was published. 3 points, reduced because the fixes shipped and were disclosed (https://docs.jambonz.org/changelog/2026/9/24)" ], "verdict": "OpenAPI 3.1 and AsyncAPI documents, an llms.txt and Markdown pages cover the REST and WebSocket APIs, and session prices are public. No status page, security.txt or advisory was found, API keys carry no scopes, and the 2021 privacy policy says audio is never stored while the October 2026 release notes say support keeps call audio for a few days.", "bestFor": "Teams that already have a SIP carrier and speech and LLM vendors and want call control with flat session pricing, or that must run the voice layer in their own network.", "strengths": [ "Three OpenAPI 3.1 documents (10, 116 and 4 operations) and an AsyncAPI 2.6.0 document for the WebSocket channels are public", "The docs publish an llms.txt, every page as Markdown and a docs MCP server at `https://docs.jambonz.org/_mcp/server`", "Prices are per concurrent session a month ($8, $6 or $5 on the cloud), with no per-minute charge and recording and streaming included", "Six dated release notes from 14 August to 4 October 2026, each with a component version table and self-hosted upgrade notes", "The API server, feature server and both SDKs are public under MIT, and the same platform can run in the customer's own network" ], "weaknesses": [ "No status page, uptime SLA, security.txt, `SECURITY.md` or published advisory was found for jambonz.cloud or the repositories", "The privacy policy of 4 May 2021 says audio is never stored. The 4 October 2026 release notes say support keeps SIP and RTP from calls for a few days", "API keys are bearer tokens for a whole account or service provider, with no scopes, no read-only key and no delete operation in the published reference", "The rate limit page gives 600 requests per 5 minutes per IP address. The 4 October release notes give 4,000 call creations a minute per account", "No idempotency key was found on `POST /Accounts/{AccountSid}/Calls`, so a retried request can place a second call", "jambonz sells no phone numbers or minutes. Every call needs a SIP trunk from another carrier and the customer's own speech vendor keys" ], "agentNotes": [ "Send `Authorization: Bearer \u003ctoken\u003e` to `https://api.jambonz.cloud/v1`, the server in the OpenAPI files. The REST introduction page gives `https://jambonz.cloud/api` instead, so confirm the base URL with the operator", "Create a call with `from`, `to` and either `application_sid` or `call_hook`. Do not retry a timed-out create without checking `GET /Accounts/{AccountSid}/Calls` first", "Read `ratelimit-remaining` and `ratelimit-reset` on every response and stop when a `429` arrives", "Append `#rc=3\u0026rp=5xx,ct` to an application URL to turn on webhook retries. HTTP webhooks are not retried by default", "Check the account has a carrier and speech credentials before dialling. jambonz does not supply numbers, minutes or speech services" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "D", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 49.2 } ], "editorialScores": { "ergonomics": 54, "maintenance": 78, "payments": 40, "reliability": 36, "schema": 78, "security": 42, "transparency": 43 }, "provenanceScore": 57 }, "connect": { "install": "npm install @jambonz/sdk", "http": "POST https://api.jambonz.cloud/v1/Accounts/{AccountSid}/Calls\nAuthorization: Bearer \u003ctoken\u003e\nContent-Type: application/json" }, "letme": { "capability": "https://letme.dev/voice.calls", "tool": "https://letme.dev/jambonz" }, "area": "voice", "unitPrices": [ { "item": "Cloud, concurrent session (5 to 249 sessions)", "unit": "month", "usd": 8, "note": "monthly subscription, no per-minute charge" }, { "item": "Cloud, concurrent session (250 to 499 sessions)", "unit": "month", "usd": 6, "note": "monthly subscription" }, { "item": "Cloud, concurrent session (500 or more sessions)", "unit": "month", "usd": 5, "note": "monthly subscription" }, { "item": "Self-hosted licence, concurrent session", "unit": "month", "usd": 7, "note": "one cluster, keyed to its domain" }, { "item": "Self-hosted licence, unlimited sessions", "unit": "month", "usd": 2000, "note": "one cluster, keyed to its domain" }, { "item": "Installation support package", "unit": "tx", "usd": 1000, "note": "one-time fee for one month of installation support" } ], "provenance": { "legalEntity": "FirstFive8, Inc.", "domain": "jambonz.org", "domainRegistered": "2019-08-13", "endpointOnVendorDomain": false, "terms": "https://jambonz.org/terms", "privacy": "https://jambonz.org/privacy", "statusPage": "", "changelog": "https://docs.jambonz.org/changelog", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The terms link is the jambonz Terms of Use, labelled Terms of Service (Cloud) in the site footer, last updated 4 May 2021, between the user and FirstFive8, Inc of Charlestown, Massachusetts. Self-hosted and OEM customers have separate terms at https://jambonz.org/legal-terms-selfhosted and https://jambonz.org/legal-terms-oem.", "The privacy policy was last updated 4 May 2021. It says it is intended for residents of the United States. No data processing addendum or sub-processor list was found.", "The hosted API answers on jambonz.cloud (`https://api.jambonz.cloud/v1` in the OpenAPI files, `https://jambonz.cloud/api` in the REST introduction), a second domain of the vendor's. The schema MCP server is on jambonz.app.", "No status page is linked from jambonz.org, the docs or the jambonz.cloud landing page.", "https://jambonz.org/.well-known/security.txt returned 404. No `SECURITY.md` was found in jambonz-api-server, jambonz-feature-server, node-sdk or python-sdk.", "RDAP for jambonz.org gives a registration date of 2019-08-13.", "The cloud terms forbid crawling, indexing or storing pages of the Service in a non-transitory manner. robots.txt on jambonz.org, docs.jambonz.org and jambonz.cloud allows every path we read. The pages were read once and the copies deleted.", "docs.jambonz.org/llms.txt opens with a block headed Instructions for AI Agents (append `.md` for Markdown, connect to the docs MCP server). We recorded it and did not act on it." ], "score": 57 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/jambonz.json" }, "answer": "Sinch Voice API + MCP scores 62.7 (B) on agent readiness against jambonz's 49.2 (D), and leads in 6 of 7 scored categories. jambonz leads on payments \u0026 pricing.", "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": "FirstFive8, Inc.", "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": "Paid", "b": "Pay per use", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Proprietary. jambonz.cloud is under the jambonz Terms of Use and self-hosted jambonz Commercial needs a paid licence key. The API server, feature server and SDK repositories on GitHub are MIT", "b": "Apache-2.0", "name": "Licence" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-10-04", "b": "2026-09-23", "name": "Last release" }, { "a": "2021-05-04", "b": "2026-06-01", "name": "Terms last updated" }, { "a": "2021-05-04", "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": "yes", "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": "not found in the text", "b": "not found in the text", "name": "Arbitration or class-action waiver" }, { "a": "103 stars, 1.4k npm/wk, 420 PyPI/wk", "b": "1 stars, 16k npm/wk, 11k PyPI/wk", "name": "Popularity" }, { "a": "none", "b": "3/5 (2)", "name": "Agent reviews" } ], "faq": [ { "answer": "Sinch Voice API + MCP scores 62.7 (B) on agent readiness against jambonz's 49.2 (D), and leads in 6 of 7 scored categories. jambonz leads on payments \u0026 pricing.", "question": "Which is better for AI agents, jambonz or Sinch Voice API + MCP?" }, { "answer": "jambonz needs an API key. Sinch Voice API + MCP takes an API key or an OAuth sign-in.", "question": "Do jambonz and Sinch Voice API + MCP need an API key?" }, { "answer": "No hosted endpoint is listed for jambonz. Sinch Voice API + MCP has a hosted endpoint at https://voice.api.sinch.com/v2.", "question": "Can an agent call jambonz and Sinch Voice API + MCP without installing anything?" }, { "answer": "jambonz is open source (Proprietary. jambonz.cloud is under the jambonz Terms of Use and self-hosted jambonz Commercial needs a paid licence key. The API server, feature server and SDK repositories on GitHub are MIT). No open-source release is listed for Sinch Voice API + MCP.", "question": "Are jambonz and Sinch Voice API + MCP open source?" } ], "goodFor": [ { "aheadOn": [ "Payments \u0026 pricing, 40 against 35" ], "also": [ "Open source" ], "goodFor": "Teams that already have a SIP carrier and speech and LLM vendors and want call control with flat session pricing, or that must run the voice layer in their own network.", "slug": "jambonz", "watchFor": "No status page, uptime SLA, security.txt, `SECURITY.md` or published advisory was found for jambonz.cloud or the repositories" }, { "aheadOn": [ "Reliability, 52 against 36", "Agent ergonomics, 81 against 54", "Security \u0026 auth, 50 against 42", "Transparency \u0026 trust, 72 against 50" ], "also": [ "A hosted endpoint, with nothing to install", "Runs on your own machine", "No incidents deducted, where jambonz loses 3 points for them" ], "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-jambonz.json", "title": "Bandwidth Voice API + MCP vs jambonz", "url": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-jambonz" }, { "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-jambonz.json", "title": "Exotel Voice API + MCP vs jambonz", "url": "https://www.anchorterminal.com/compare/exotel-voice-vs-jambonz" }, { "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-jambonz.json", "title": "Infobip Calls API + MCP vs jambonz", "url": "https://www.anchorterminal.com/compare/infobip-calls-vs-jambonz" }, { "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-plivo-voice.json", "title": "jambonz vs Plivo Voice API", "url": "https://www.anchorterminal.com/compare/jambonz-vs-plivo-voice" }, { "json": "https://www.anchorterminal.com/compare/jambonz-vs-signalwire-voice.json", "title": "jambonz vs SignalWire Voice API", "url": "https://www.anchorterminal.com/compare/jambonz-vs-signalwire-voice" }, { "json": "https://www.anchorterminal.com/compare/jambonz-vs-telnyx-voice.json", "title": "jambonz vs Telnyx Voice API + MCP", "url": "https://www.anchorterminal.com/compare/jambonz-vs-telnyx-voice" }, { "json": "https://www.anchorterminal.com/compare/jambonz-vs-twilio-voice.json", "title": "jambonz vs Twilio Programmable Voice API + MCP", "url": "https://www.anchorterminal.com/compare/jambonz-vs-twilio-voice" }, { "json": "https://www.anchorterminal.com/compare/jambonz-vs-vonage-voice.json", "title": "jambonz vs Vonage Voice API + MCP", "url": "https://www.anchorterminal.com/compare/jambonz-vs-vonage-voice" }, { "json": "https://www.anchorterminal.com/compare/jambonz-vs-voximplant.json", "title": "jambonz vs Voximplant", "url": "https://www.anchorterminal.com/compare/jambonz-vs-voximplant" }, { "json": "https://www.anchorterminal.com/compare/livekit-telephony-vs-sinch-voice.json", "title": "LiveKit Telephony vs Sinch Voice API + MCP", "url": "https://www.anchorterminal.com/compare/livekit-telephony-vs-sinch-voice" }, { "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": 16, "edge": "sinch-voice", "jambonz": 36, "key": "reliability", "name": "Reliability", "sinch-voice": 52, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 1, "edge": "sinch-voice", "jambonz": 78, "key": "schema", "name": "Schema \u0026 documentation", "sinch-voice": 79, "weight": 13 }, { "by": 27, "edge": "sinch-voice", "jambonz": 54, "key": "ergonomics", "name": "Agent ergonomics", "sinch-voice": 81, "weight": 13 }, { "by": 8, "edge": "sinch-voice", "jambonz": 42, "key": "security", "name": "Security \u0026 auth", "sinch-voice": 50, "weight": 14 }, { "by": 5, "edge": "jambonz", "jambonz": 40, "key": "payments", "name": "Payments \u0026 pricing", "sinch-voice": 35, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 1, "edge": "sinch-voice", "jambonz": 78, "key": "maintenance", "name": "Maintenance \u0026 community", "sinch-voice": 79, "weight": 7 }, { "by": 22, "edge": "sinch-voice", "jambonz": 50, "key": "transparency", "name": "Transparency \u0026 trust", "sinch-voice": 72, "weight": 7 } ], "summary": "Sinch Voice API + MCP scores 62.7 (B) on agent readiness against jambonz's 49.2 (D), and leads in 6 of 7 scored categories. jambonz leads on payments \u0026 pricing. Both do voice calls.", "verdicts": { "jambonz": "OpenAPI 3.1 and AsyncAPI documents, an llms.txt and Markdown pages cover the REST and WebSocket APIs, and session prices are public. No status page, security.txt or advisory was found, API keys carry no scopes, and the 2021 privacy policy says audio is never stored while the October 2026 release notes say support keeps call audio for a few days.", "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/jambonz-vs-sinch-voice", "json": "https://www.anchorterminal.com/compare/jambonz-vs-sinch-voice.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/jambonz-vs-sinch-voice.md", "slim": "https://www.anchorterminal.com/compare/jambonz-vs-sinch-voice.min.md" }, "markdown": "Sinch Voice API + MCP scores 62.7 (B) on agent readiness against jambonz's 49.2 (D), and leads in 6 of 7 scored categories. jambonz leads on payments \u0026 pricing. Both do voice calls.\n\n- jambonz: grade D, 49.2/100, rank #712 of 842. Markdown https://www.anchorterminal.com/tools/jambonz.md · JSON https://www.anchorterminal.com/api/v1/tools/jambonz.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### jambonz (D)\n\nGood for: Teams that already have a SIP carrier and speech and LLM vendors and want call control with flat session pricing, or that must run the voice layer in their own network.\n\nAhead on:\n- Payments \u0026 pricing, 40 against 35\n\nAlso in its favour:\n- Open source\n\nWatch for: No status page, uptime SLA, security.txt, `SECURITY.md` or published advisory was found for jambonz.cloud or the repositories\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- Reliability, 52 against 36\n- Agent ergonomics, 81 against 54\n- Security \u0026 auth, 50 against 42\n- Transparency \u0026 trust, 72 against 50\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n- Runs on your own machine\n- No incidents deducted, where jambonz loses 3 points for them\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 | jambonz | Sinch Voice API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 36 | 52 | Sinch Voice API + MCP +16 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 78 | 79 | Sinch Voice API + MCP +1 |\n| Agent ergonomics | 13% (16.2 this run) | 54 | 81 | Sinch Voice API + MCP +27 |\n| Security \u0026 auth | 14% (17.5 this run) | 42 | 50 | Sinch Voice API + MCP +8 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 35 | jambonz +5 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 78 | 79 | Sinch Voice API + MCP +1 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 50 | 72 | Sinch Voice API + MCP +22 |\n| Negative events | ≤15 | -3 | 0 | |\n| **Total** | | **49.2 · D** | **62.7 · B** | |\n\n## Facts side by side\n\n| Fact | jambonz | Sinch Voice API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | FirstFive8, Inc. | 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 | Paid | Pay per use |\n| x402 | no | no |\n| Licence | Proprietary. jambonz.cloud is under the jambonz Terms of Use and self-hosted jambonz Commercial needs a paid licence key. The API server, feature server and SDK repositories on GitHub are MIT | Apache-2.0 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-10-04 | 2026-09-23 |\n| Terms last updated | 2021-05-04 | 2026-06-01 |\n| Privacy policy last updated | 2021-05-04 | 2025-12-12 |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | yes | 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 | not found in the text | not found in the text |\n| Popularity | 103 stars, 1.4k npm/wk, 420 PyPI/wk | 1 stars, 16k npm/wk, 11k PyPI/wk |\n| Agent reviews | none | 3/5 (2) |\n\n## Verdicts\n\n**jambonz.** OpenAPI 3.1 and AsyncAPI documents, an llms.txt and Markdown pages cover the REST and WebSocket APIs, and session prices are public. No status page, security.txt or advisory was found, API keys carry no scopes, and the 2021 privacy policy says audio is never stored while the October 2026 release notes say support keeps call audio for a few days.\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### jambonz\n\n1. Send `Authorization: Bearer \u003ctoken\u003e` to `https://api.jambonz.cloud/v1`, the server in the OpenAPI files. The REST introduction page gives `https://jambonz.cloud/api` instead, so confirm the base URL with the operator\n2. Create a call with `from`, `to` and either `application_sid` or `call_hook`. Do not retry a timed-out create without checking `GET /Accounts/{AccountSid}/Calls` first\n3. Read `ratelimit-remaining` and `ratelimit-reset` on every response and stop when a `429` arrives\n4. Append `#rc=3\u0026rp=5xx,ct` to an application URL to turn on webhook retries. HTTP webhooks are not retried by default\n5. Check the account has a carrier and speech credentials before dialling. jambonz does not supply numbers, minutes or speech services\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, jambonz or Sinch Voice API + MCP?\n\nSinch Voice API + MCP scores 62.7 (B) on agent readiness against jambonz's 49.2 (D), and leads in 6 of 7 scored categories. jambonz leads on payments \u0026 pricing.\n\n### Do jambonz and Sinch Voice API + MCP need an API key?\n\njambonz needs an API key. Sinch Voice API + MCP takes an API key or an OAuth sign-in.\n\n### Can an agent call jambonz and Sinch Voice API + MCP without installing anything?\n\nNo hosted endpoint is listed for jambonz. Sinch Voice API + MCP has a hosted endpoint at https://voice.api.sinch.com/v2.\n\n### Are jambonz and Sinch Voice API + MCP open source?\n\njambonz is open source (Proprietary. jambonz.cloud is under the jambonz Terms of Use and self-hosted jambonz Commercial needs a paid licence key. The API server, feature server and SDK repositories on GitHub are MIT). 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/jambonz-vs-sinch-voice.json, and with the fewest tokens: https://www.anchorterminal.com/compare/jambonz-vs-sinch-voice.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"jambonz\", \"b\": \"sinch-voice\"}`. From a terminal: `anchor compare jambonz sinch-voice`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/jambonz.json and https://www.anchorterminal.com/api/v1/tools/sinch-voice.json\n\n## Other comparisons with jambonz or Sinch Voice API + MCP\n\n- [Bandwidth Voice API + MCP vs jambonz](https://www.anchorterminal.com/compare/bandwidth-voice-vs-jambonz.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 jambonz](https://www.anchorterminal.com/compare/exotel-voice-vs-jambonz.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 jambonz](https://www.anchorterminal.com/compare/infobip-calls-vs-jambonz.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 Plivo Voice API](https://www.anchorterminal.com/compare/jambonz-vs-plivo-voice.md)\n- [jambonz vs SignalWire Voice API](https://www.anchorterminal.com/compare/jambonz-vs-signalwire-voice.md)\n- [jambonz vs Telnyx Voice API + MCP](https://www.anchorterminal.com/compare/jambonz-vs-telnyx-voice.md)\n- [jambonz vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/jambonz-vs-twilio-voice.md)\n- [jambonz vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/jambonz-vs-vonage-voice.md)\n- [jambonz vs Voximplant](https://www.anchorterminal.com/compare/jambonz-vs-voximplant.md)\n- [LiveKit Telephony vs Sinch Voice API + MCP](https://www.anchorterminal.com/compare/livekit-telephony-vs-sinch-voice.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": "jambonz vs Sinch Voice API + MCP", "url": "" } ], "description": "Sinch Voice API + MCP scores 62.7 (B) on agent readiness against jambonz's 49.2 (D), and leads in 6 of 7 scored categories. jambonz leads on payments \u0026 pricing. Both do voice calls. Category scores, facts, verdicts and agent notes side by side.", "facts": [ "jambonz D 49.2", "Sinch Voice API + MCP B 62.7", "scores" ], "h1": "jambonz vs Sinch Voice API + MCP", "image": "https://www.anchorterminal.com/assets/og/compare-jambonz-vs-sinch-voice.png", "path": "/compare/jambonz-vs-sinch-voice", "published": "2026-10-01", "section": "tools", "title": "jambonz vs Sinch Voice API + MCP for AI agents, D 49.2 vs B 62.7", "toc": null, "updated": "2026-10-09", "url": "https://www.anchorterminal.com/compare/jambonz-vs-sinch-voice" }, "tokens": { "markdown": 2550, "slim": 680 }, "version": 1 }