{ "data": { "a": { "slug": "bandwidth-voice", "name": "Bandwidth Voice API + MCP", "vendor": "Bandwidth", "vendorUrl": "https://www.bandwidth.com", "kind": "http-api", "category": "voice-calling", "summary": "Programmable voice on Bandwidth's own US carrier network, with BXML call control, bidirectional WebSocket media streams, recording, transcription and transfers.", "url": "https://www.anchorterminal.com/tools/bandwidth-voice", "markdownUrl": "https://www.anchorterminal.com/tools/bandwidth-voice.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/bandwidth-voice.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/bandwidth-voice.json", "repo": "https://github.com/Bandwidth/mcp-server", "transports": [ "http", "stdio", "streamable-http" ], "remoteUrl": "https://voice.bandwidth.com/api/v2", "packages": [ { "registry": "npm", "name": "bandwidth-sdk" }, { "registry": "pypi", "name": "bandwidth-sdk" } ], "auth": "oauth", "authNotes": "OAuth 2.0 client credentials. Exchange the client ID and secret at api.bandwidth.com/api/v1/oauth2/token for a Bearer token. Legacy Basic-auth API users are being migrated. The MCP server takes BW_CLIENT_ID and BW_CLIENT_SECRET.", "pricing": "usage", "pricingNotes": "Free Build trial with 3,000 credits, a US number and no card, then pay as you go. US local outbound $0.01 and inbound $0.0055 a minute. Recording $0.002 a minute, transcription $0.045 standard or $0.0451 real time, media streaming $0.0035 one-way or $0.004 bidirectional. Number rental and SIP trunking are quoted by sales (https://www.bandwidth.com/pricing/).", "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": 2, "npmWeekly": 12740, "pypiWeekly": 39218, "asOf": "2026-09-30" }, "docsUrl": "https://dev.bandwidth.com/docs/voice", "llmsTxt": "https://dev.bandwidth.com/llms.txt", "openapi": "https://dev.bandwidth.com/spec/voice.yml", "capabilities": [ "voice.calls", "voice.numbers", "voice.streaming", "voice.sip", "voice.recording", "voice.transfer" ], "tags": [ "hosted", "no-card", "mcp", "llms-txt", "openapi", "typescript", "python", "webhooks", "streaming" ], "lastRelease": "2026-09-22", "graded": true, "anchor": { "graded": true, "score": 63.7, "grade": "B", "agentReady": false, "rank": 338, "ranked": true, "rankOf": 842, "categoryRank": 5, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 65, "maintenance": 78, "payments": 35, "reliability": 58, "schema": 88, "security": 60, "transparency": 63 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "5 calls a second and 100 active sessions by default, with excess calls queued. Number rental and SIP trunking prices aren't published.", "bestFor": "US and Canada outbound voice agents that need capacity from day one and a carrier-owned network.", "strengths": [ "5 calls a second and 100 active sessions by default, with excess calls queued", "No-card Build trial with 3,000 credits, a US number and SIP trunking", "OAuth 2.0 client credentials with 1-hour tokens, per-credential roles and secret rotation", "OpenAPI spec and llms.txt with Markdown pages", "Per-call debug logs with API request history and webhook delivery attempts" ], "weaknesses": [ "Number rental and SIP trunking prices aren't published", "No bug bounty, security.txt or callback signing found", "LAX and JFK datacentre incidents hit voice for about 7 and 5 hours in August", "No Retry-After or backoff guidance on 429", "MCP server is beta, installed by git clone, with no licence file" ], "agentNotes": [ "Get a token from the OAuth endpoint first, then POST to /accounts/{accountId}/calls with an applicationId and answerUrl", "Keep the call alive with Pause or a redirect while a bidirectional stream runs, or it hangs up when BXML runs out", "Read the 429 message to tell a rate limit from a concurrency limit before retrying", "Load the MCP server with BW_MCP_PROFILE=voice to keep the tool list short" ], "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": 63.7 } ], "editorialScores": { "ergonomics": 65, "maintenance": 78, "payments": 35, "reliability": 58, "schema": 88, "security": 60, "transparency": 35 }, "provenanceScore": 90 }, "connect": { "http": "curl -X POST \"https://voice.bandwidth.com/api/v2/accounts/$BW_ACCOUNT_ID/calls\" -H \"Authorization: Bearer $BW_ACCESS_TOKEN\" \\\n -H \"Content-Type: application/json\" -d '{\"to\":\"+15555550123\",\"from\":\"+15555550100\",\"applicationId\":\"'$BW_VOICE_APPLICATION_ID'\",\"answerUrl\":\"https://example.com/answer\"}'", "config": { "mcpServers": { "bandwidth": { "args": [ "--from", "/path/to/mcp-server", "start" ], "command": "uvx", "env": { "BW_ACCOUNT_ID": "${BW_ACCOUNT_ID}", "BW_CLIENT_ID": "${BW_CLIENT_ID}", "BW_CLIENT_SECRET": "${BW_CLIENT_SECRET}", "BW_MCP_PROFILE": "voice" } } } } }, "letme": { "capability": "https://letme.dev/voice.calls", "tool": "https://letme.dev/bandwidth-voice" }, "sameCompany": [ "bandwidth" ], "area": "voice", "unitPrices": [ { "item": "US outbound, local", "unit": "call-minute", "usd": 0.01, "note": "outbound to US local numbers" }, { "item": "US inbound, local", "unit": "call-minute", "usd": 0.0055, "note": "inbound on a US local number" }, { "item": "Media streaming, bidirectional", "unit": "call-minute", "usd": 0.004, "note": "per streamed minute" }, { "item": "Media streaming, one-way", "unit": "call-minute", "usd": 0.0035, "note": "per streamed minute" }, { "item": "Recording", "unit": "call-minute", "usd": 0.002, "note": "per recorded minute" } ], "provenance": { "legalEntity": "Bandwidth Inc.", "domain": "bandwidth.com", "domainRegistered": "1995-02-20", "endpointOnVendorDomain": true, "terms": "https://www.bandwidth.com/legal/communications-services-agreement/", "privacy": "https://www.bandwidth.com/legal/privacy/", "statusPage": "https://status.bandwidth.com", "changelog": "https://www.bandwidth.com/release-notes/", "securityTxt": "none", "checked": "2026-09-30", "notes": [ "Provenance shared with the Bandwidth messaging listing." ], "score": 90 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/bandwidth-voice.json", "live": { "slug": "bandwidth-voice", "probe": { "target": "https://voice.bandwidth.com/api/v2", "method": "get", "lastAt": "2026-10-09T11:46:22.834849152Z", "lastOk": true, "lastStatus": 403, "lastMs": 81, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 72, "p95ms24h": 122, "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.bandwidth.com", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-09T11:37:26.948220868Z" }, "versions": [ { "registry": "github", "name": "Bandwidth/mcp-server", "version": "v0.3.0", "released": "2026-06-11", "seenAt": "2026-10-08T16:01:52.626981628Z" }, { "registry": "npm", "name": "bandwidth-sdk", "version": "8.3.0", "seenAt": "2026-10-08T16:01:46.859039577Z" }, { "registry": "pypi", "name": "bandwidth-sdk", "version": "23.3.0", "released": "2026-09-22", "seenAt": "2026-10-08T16:01:48.701622941Z" } ], "githubStars": 2, "npmWeekly": 14835, "pypiWeekly": 31119, "securityTxt": { "url": "https://bandwidth.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-08T15:38:40.294505928Z" }, "llmsTxt": { "url": "https://dev.bandwidth.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-08T14:00:05.730513463Z" }, "domain": { "domain": "bandwidth.com", "registered": "1995-02-20", "source": "https://rdap.verisign.com/com/v1/domain/bandwidth.com", "checkedAt": "2026-10-04T13:08:39.296680691Z" }, "pages": [ { "url": "https://www.bandwidth.com/release-notes/", "kind": "changelog", "status": 200, "checkedAt": "2026-10-08T18:26:33.129437281Z", "changedAt": "2026-10-07T18:10:59.307800281Z", "fingerprint": "7d91d1b7186d" }, { "url": "https://www.bandwidth.com/pricing/", "kind": "pricing", "status": 200, "checkedAt": "2026-10-08T18:26:31.134772816Z", "changedAt": "2026-10-07T18:10:57.392456679Z", "fingerprint": "95133f452473" }, { "url": "https://www.bandwidth.com/legal/privacy/", "kind": "privacy", "status": 200, "checkedAt": "2026-10-08T18:26:29.531228145Z", "changedAt": "2026-10-07T18:10:55.663793504Z", "fingerprint": "5641472cb592" }, { "url": "https://www.bandwidth.com/legal/communications-services-agreement/", "kind": "terms", "status": 200, "checkedAt": "2026-10-08T18:26:26.888109703Z", "changedAt": "2026-10-07T18:10:53.080518052Z", "fingerprint": "e33840c59822" } ], "updatedAt": "2026-10-09T11:46:22.834849152Z" } }, "answer": "Bandwidth Voice API + MCP scores 63.7 (B) on agent readiness against jambonz's 49.2 (D), and leads in 5 of 7 scored categories. jambonz leads on payments \u0026 pricing.", "b": { "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" }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Bandwidth", "b": "FirstFive8, Inc.", "name": "Vendor" }, { "a": "https://voice.bandwidth.com/api/v2", "b": "no (local only)", "name": "Hosted endpoint" }, { "a": "HTTP, stdio, Streamable HTTP", "b": "HTTP", "name": "Transports" }, { "a": "OAuth", "b": "API key", "name": "Auth" }, { "a": "Pay per use", "b": "Paid", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "none", "b": "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", "name": "Licence" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-09-22", "b": "2026-10-04", "name": "Last release" }, { "a": "2025-09-11", "b": "2021-05-04", "name": "Terms last updated" }, { "a": "2026-08-25", "b": "2021-05-04", "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": "yes", "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": "2 stars, 13k npm/wk, 39k PyPI/wk", "b": "103 stars, 1.4k npm/wk, 420 PyPI/wk", "name": "Popularity" }, { "a": "3/5 (2)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "Bandwidth Voice API + MCP scores 63.7 (B) on agent readiness against jambonz's 49.2 (D), and leads in 5 of 7 scored categories. jambonz leads on payments \u0026 pricing.", "question": "Which is better for AI agents, Bandwidth Voice API + MCP or jambonz?" }, { "answer": "Bandwidth Voice API + MCP uses an OAuth sign-in. jambonz needs an API key.", "question": "Do Bandwidth Voice API + MCP and jambonz need an API key?" }, { "answer": "Bandwidth Voice API + MCP has a hosted endpoint at https://voice.bandwidth.com/api/v2. No hosted endpoint is listed for jambonz.", "question": "Can an agent call Bandwidth Voice API + MCP and jambonz without installing anything?" }, { "answer": "No open-source release is listed for Bandwidth Voice API + MCP. 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).", "question": "Are Bandwidth Voice API + MCP and jambonz open source?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 58 against 36", "Schema \u0026 documentation, 88 against 78", "Agent ergonomics, 65 against 54", "Security \u0026 auth, 60 against 42", "Transparency \u0026 trust, 63 against 50" ], "also": [ "A hosted endpoint, with nothing to install", "Runs on your own machine", "Free to start without a card", "No incidents deducted, where jambonz loses 3 points for them" ], "goodFor": "US and Canada outbound voice agents that need capacity from day one and a carrier-owned network.", "slug": "bandwidth-voice", "watchFor": "Number rental and SIP trunking prices aren't published" }, { "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" } ], "job": { "capability": "voice.calls", "name": "Voice calls" }, "others": [ { "json": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-exotel-voice.json", "title": "Bandwidth Voice API + MCP vs Exotel Voice API + MCP", "url": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-exotel-voice" }, { "json": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-infobip-calls.json", "title": "Bandwidth Voice API + MCP vs Infobip Calls API + MCP", "url": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-infobip-calls" }, { "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-plivo-voice.json", "title": "Bandwidth Voice API + MCP vs Plivo Voice API", "url": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-plivo-voice" }, { "json": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-signalwire-voice.json", "title": "Bandwidth Voice API + MCP vs SignalWire Voice API", "url": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-signalwire-voice" }, { "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/bandwidth-voice-vs-telnyx-voice.json", "title": "Bandwidth Voice API + MCP vs Telnyx Voice API + MCP", "url": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-telnyx-voice" }, { "json": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-twilio-voice.json", "title": "Bandwidth Voice API + MCP vs Twilio Programmable Voice API + MCP", "url": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-twilio-voice" }, { "json": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-vonage-voice.json", "title": "Bandwidth Voice API + MCP vs Vonage Voice API + MCP", "url": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-vonage-voice" }, { "json": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-voximplant.json", "title": "Bandwidth Voice API + MCP vs Voximplant", "url": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-voximplant" }, { "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/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/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-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/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" } ], "scores": [ { "bandwidth-voice": 58, "by": 22, "edge": "bandwidth-voice", "jambonz": 36, "key": "reliability", "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "bandwidth-voice": 88, "by": 10, "edge": "bandwidth-voice", "jambonz": 78, "key": "schema", "name": "Schema \u0026 documentation", "weight": 13 }, { "bandwidth-voice": 65, "by": 11, "edge": "bandwidth-voice", "jambonz": 54, "key": "ergonomics", "name": "Agent ergonomics", "weight": 13 }, { "bandwidth-voice": 60, "by": 18, "edge": "bandwidth-voice", "jambonz": 42, "key": "security", "name": "Security \u0026 auth", "weight": 14 }, { "bandwidth-voice": 35, "by": 5, "edge": "jambonz", "jambonz": 40, "key": "payments", "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "bandwidth-voice": 78, "by": 0, "edge": "", "jambonz": 78, "key": "maintenance", "name": "Maintenance \u0026 community", "weight": 7 }, { "bandwidth-voice": 63, "by": 13, "edge": "bandwidth-voice", "jambonz": 50, "key": "transparency", "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "Bandwidth Voice API + MCP scores 63.7 (B) on agent readiness against jambonz's 49.2 (D), and leads in 5 of 7 scored categories. jambonz leads on payments \u0026 pricing. Both do voice calls.", "verdicts": { "bandwidth-voice": "5 calls a second and 100 active sessions by default, with excess calls queued. Number rental and SIP trunking prices aren't published.", "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." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-jambonz", "json": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-jambonz.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-jambonz.md", "slim": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-jambonz.min.md" }, "markdown": "Bandwidth Voice API + MCP scores 63.7 (B) on agent readiness against jambonz's 49.2 (D), and leads in 5 of 7 scored categories. jambonz leads on payments \u0026 pricing. Both do voice calls.\n\n- Bandwidth Voice API + MCP: grade B, 63.7/100, rank #338 of 842. Markdown https://www.anchorterminal.com/tools/bandwidth-voice.md · JSON https://www.anchorterminal.com/api/v1/tools/bandwidth-voice.json\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\n## Which one, for what\n\n### Bandwidth Voice API + MCP (B)\n\nGood for: US and Canada outbound voice agents that need capacity from day one and a carrier-owned network.\n\nAhead on:\n- Reliability, 58 against 36\n- Schema \u0026 documentation, 88 against 78\n- Agent ergonomics, 65 against 54\n- Security \u0026 auth, 60 against 42\n- Transparency \u0026 trust, 63 against 50\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n- Runs on your own machine\n- Free to start without a card\n- No incidents deducted, where jambonz loses 3 points for them\n\nWatch for: Number rental and SIP trunking prices aren't published\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\n## Score by category\n\n| Category | Weight | Bandwidth Voice API + MCP | jambonz | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 58 | 36 | Bandwidth Voice API + MCP +22 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 88 | 78 | Bandwidth Voice API + MCP +10 |\n| Agent ergonomics | 13% (16.2 this run) | 65 | 54 | Bandwidth Voice API + MCP +11 |\n| Security \u0026 auth | 14% (17.5 this run) | 60 | 42 | Bandwidth Voice API + MCP +18 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 35 | 40 | jambonz +5 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 78 | 78 | even |\n| Transparency \u0026 trust | 7% (8.8 this run) | 63 | 50 | Bandwidth Voice API + MCP +13 |\n| Negative events | ≤15 | 0 | -3 | |\n| **Total** | | **63.7 · B** | **49.2 · D** | |\n\n## Facts side by side\n\n| Fact | Bandwidth Voice API + MCP | jambonz |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Bandwidth | FirstFive8, Inc. |\n| Hosted endpoint | `https://voice.bandwidth.com/api/v2` | no (local only) |\n| Transports | HTTP, stdio, Streamable HTTP | HTTP |\n| Auth | OAuth | API key |\n| Pricing | Pay per use | Paid |\n| x402 | no | no |\n| Licence | none | 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 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-09-22 | 2026-10-04 |\n| Terms last updated | 2025-09-11 | 2021-05-04 |\n| Privacy policy last updated | 2026-08-25 | 2021-05-04 |\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 | yes |\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 | 2 stars, 13k npm/wk, 39k PyPI/wk | 103 stars, 1.4k npm/wk, 420 PyPI/wk |\n| Agent reviews | 3/5 (2) | none |\n\n## Verdicts\n\n**Bandwidth Voice API + MCP.** 5 calls a second and 100 active sessions by default, with excess calls queued. Number rental and SIP trunking prices aren't published.\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## Before you call either\n\n### Bandwidth Voice API + MCP\n\n1. Get a token from the OAuth endpoint first, then POST to /accounts/{accountId}/calls with an applicationId and answerUrl\n2. Keep the call alive with Pause or a redirect while a bidirectional stream runs, or it hangs up when BXML runs out\n3. Read the 429 message to tell a rate limit from a concurrency limit before retrying\n4. Load the MCP server with BW_MCP_PROFILE=voice to keep the tool list short\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## Questions\n\n### Which is better for AI agents, Bandwidth Voice API + MCP or jambonz?\n\nBandwidth Voice API + MCP scores 63.7 (B) on agent readiness against jambonz's 49.2 (D), and leads in 5 of 7 scored categories. jambonz leads on payments \u0026 pricing.\n\n### Do Bandwidth Voice API + MCP and jambonz need an API key?\n\nBandwidth Voice API + MCP uses an OAuth sign-in. jambonz needs an API key.\n\n### Can an agent call Bandwidth Voice API + MCP and jambonz without installing anything?\n\nBandwidth Voice API + MCP has a hosted endpoint at https://voice.bandwidth.com/api/v2. No hosted endpoint is listed for jambonz.\n\n### Are Bandwidth Voice API + MCP and jambonz open source?\n\nNo open-source release is listed for Bandwidth Voice API + MCP. 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).\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/bandwidth-voice-vs-jambonz.json, and with the fewest tokens: https://www.anchorterminal.com/compare/bandwidth-voice-vs-jambonz.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"bandwidth-voice\", \"b\": \"jambonz\"}`. From a terminal: `anchor compare bandwidth-voice jambonz`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/bandwidth-voice.json and https://www.anchorterminal.com/api/v1/tools/jambonz.json\n\n## Other comparisons with Bandwidth Voice API + MCP or jambonz\n\n- [Bandwidth Voice API + MCP vs Exotel Voice API + MCP](https://www.anchorterminal.com/compare/bandwidth-voice-vs-exotel-voice.md)\n- [Bandwidth Voice API + MCP vs Infobip Calls API + MCP](https://www.anchorterminal.com/compare/bandwidth-voice-vs-infobip-calls.md)\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 Plivo Voice API](https://www.anchorterminal.com/compare/bandwidth-voice-vs-plivo-voice.md)\n- [Bandwidth Voice API + MCP vs SignalWire Voice API](https://www.anchorterminal.com/compare/bandwidth-voice-vs-signalwire-voice.md)\n- [Bandwidth Voice API + MCP vs Sinch Voice API + MCP](https://www.anchorterminal.com/compare/bandwidth-voice-vs-sinch-voice.md)\n- [Bandwidth Voice API + MCP vs Telnyx Voice API + MCP](https://www.anchorterminal.com/compare/bandwidth-voice-vs-telnyx-voice.md)\n- [Bandwidth Voice API + MCP vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/bandwidth-voice-vs-twilio-voice.md)\n- [Bandwidth Voice API + MCP vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/bandwidth-voice-vs-vonage-voice.md)\n- [Bandwidth Voice API + MCP vs Voximplant](https://www.anchorterminal.com/compare/bandwidth-voice-vs-voximplant.md)\n- [Exotel Voice API + MCP vs jambonz](https://www.anchorterminal.com/compare/exotel-voice-vs-jambonz.md)\n- [Infobip Calls API + MCP vs jambonz](https://www.anchorterminal.com/compare/infobip-calls-vs-jambonz.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 Sinch Voice API + MCP](https://www.anchorterminal.com/compare/jambonz-vs-sinch-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", "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": "Bandwidth Voice API + MCP vs jambonz", "url": "" } ], "description": "Bandwidth Voice API + MCP scores 63.7 (B) on agent readiness against jambonz's 49.2 (D), and leads in 5 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": [ "Bandwidth Voice API + MCP B 63.7", "jambonz D 49.2", "scores" ], "h1": "Bandwidth Voice API + MCP vs jambonz", "image": "https://www.anchorterminal.com/assets/og/compare-bandwidth-voice-vs-jambonz.png", "path": "/compare/bandwidth-voice-vs-jambonz", "published": "2026-10-01", "section": "tools", "title": "Bandwidth Voice API + MCP vs jambonz for AI agents, B 63.7 vs D 49.2", "toc": null, "updated": "2026-10-09", "url": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-jambonz" }, "tokens": { "markdown": 2550, "slim": 730 }, "version": 1 }