{ "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": 374, "ranked": true, "rankOf": 950, "categoryRank": 6, "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": "2026-10-10T03:06:57.982459853Z", "lastOk": true, "lastStatus": 403, "lastMs": 71, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 74, "p95ms24h": 159, "samples24h": 249, "samples30d": 2468, "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": 250, "ok": 250 }, { "date": "2026-10-10", "probes": 32, "ok": 32 } ] }, "vendorStatus": { "page": "https://status.bandwidth.com", "indicator": "major", "summary": "Partial System Outage", "checkedAt": "2026-10-10T03:01:50.715388707Z" }, "versions": [ { "registry": "github", "name": "Bandwidth/mcp-server", "version": "v0.3.0", "released": "2026-06-11", "seenAt": "2026-10-09T16:42:19.605402895Z" }, { "registry": "npm", "name": "bandwidth-sdk", "version": "8.3.0", "seenAt": "2026-10-09T16:42:18.582092412Z" }, { "registry": "pypi", "name": "bandwidth-sdk", "version": "23.3.0", "released": "2026-09-22", "seenAt": "2026-10-09T16:42:19.409135684Z" } ], "githubStars": 2, "npmWeekly": 14809, "pypiWeekly": 26765, "securityTxt": { "url": "https://bandwidth.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-09T15:40:12.81833044Z" }, "llmsTxt": { "url": "https://dev.bandwidth.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-09T14:01:29.440356661Z" }, "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": "2026-10-09T18:48:30.606300327Z", "changedAt": "2026-10-09T18:48:30.606300327Z", "fingerprint": "7851d5249b74" }, { "url": "https://www.bandwidth.com/pricing/", "kind": "pricing", "status": 200, "checkedAt": "2026-10-09T18:48:28.559196241Z", "changedAt": "2026-10-07T18:10:57.392456679Z", "fingerprint": "2f621be823df" }, { "url": "https://www.bandwidth.com/legal/privacy/", "kind": "privacy", "status": 200, "checkedAt": "2026-10-09T18:48:27.288246162Z", "changedAt": "2026-10-07T18:10:55.663793504Z", "fingerprint": "af2b4e8503ef" }, { "url": "https://www.bandwidth.com/legal/communications-services-agreement/", "kind": "terms", "status": 200, "checkedAt": "2026-10-09T18:48:24.246370468Z", "changedAt": "2026-10-09T18:48:24.246370468Z", "fingerprint": "2b4532228e6f" } ], "updatedAt": "2026-10-10T03:06:57.982459853Z" } }, "answer": "DIDWW Voice and Number Management API scores 65.1 (B) on agent readiness against Bandwidth Voice API + MCP's 63.7 (B), and leads in 4 of 7 scored categories. Bandwidth Voice API + MCP leads on payments \u0026 pricing.", "b": { "slug": "didww-voice-and-number-management", "name": "DIDWW Voice and Number Management API", "vendor": "DIDWW Ireland Limited", "vendorUrl": "https://www.didww.com", "kind": "http-api", "category": "voice-calling", "summary": "DIDWW is a telecoms carrier selling phone numbers in more than 90 countries with inbound and outbound SIP trunking. Its REST API v3 orders numbers and configures trunks and capacity, and a remote MCP server covers the same account tasks.", "url": "https://www.anchorterminal.com/tools/didww-voice-and-number-management", "markdownUrl": "https://www.anchorterminal.com/tools/didww-voice-and-number-management.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/didww-voice-and-number-management.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/didww-voice-and-number-management.json", "repo": "https://github.com/didww/didww-api-3-openapi", "license": "Proprietary service under the DIDWW Terms and Agreements (Rev 3.1). The OpenAPI repository and the official SDKs are MIT", "transports": [ "http" ], "remoteUrl": "https://api.didww.com/mcp", "packages": [ { "registry": "npm", "name": "@didww/sdk" }, { "registry": "pypi", "name": "didww" } ], "auth": "api-key", "authNotes": "REST API v3 takes an API key in the `Api-Key` header with no `Bearer` prefix. Keys are created by a signed-in person in the User Panel under APIs, DIDWW API 3, with a friendly name and an optional source IP allow list. No scopes or read-only keys were found. Production and sandbox keys are separate. Access is self-serve after a browser sign-up with email confirmation. Outbound trunks need an approved application. The MCP server at `https://api.didww.com/mcp` uses OAuth 2.0 with PKCE and dynamic client registration, a browser sign-in and the user's panel roles, with tokens lasting two hours.", "pricing": "usage", "pricingNotes": "No per-number or per-minute price is public. Price lists are requested through a form or read inside an account or through the API. Accounts are free and prepaid in US dollars, with a $30 minimum balance before ordering and a $100 minimum for wire transfers. A number costs a one-time fee equal to one month's charge, waived for API orders, plus a monthly charge. Inbound capacity is flat-rate per channel or per minute, and outbound termination is per minute. The sandbox is free and takes Stripe test cards (https://www.didww.com/pricing.md, checked 2026-10-09).", "priceSummary": "Pay per use", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the OpenAPI document, the docs indexes, the authentication guide or the pricing page (checked 2026-10-09).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 10, "npmWeekly": 462, "pypiWeekly": null, "asOf": "2026-10-09" }, "docsUrl": "https://doc.didww.com/api3/2026-04-16/index.html", "llmsTxt": "https://doc.didww.com/llms.txt", "openapi": "https://doc.didww.com/openapi/2026-04-16/v3_api.json", "capabilities": [ "voice.numbers", "voice.sip" ], "tags": [ "hosted", "sip", "phone-numbers", "openapi", "llms-txt", "mcp", "oauth", "sandbox", "typescript", "python", "webhooks", "prepaid" ], "lastRelease": "2026-10-07", "graded": true, "anchor": { "graded": true, "score": 65.1, "grade": "B", "agentReady": false, "rank": 330, "ranked": true, "rankOf": 950, "categoryRank": 5, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 77, "maintenance": 83, "payments": 15, "reliability": 66, "schema": 87, "security": 57, "transparency": 70 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-09" }, "negative": 0, "verdict": "An OpenAPI 3.0.3 document with 107 operations, Markdown docs, a free sandbox and SDKs in seven languages cover number ordering and SIP trunk set-up. No per-number or per-minute price is public, API keys carry no scopes, orders have no idempotency key, and outbound calling needs an approved application. Calls travel over SIP only.", "bestFor": "Teams that run their own SIP system, or a voice agent platform that accepts SIP trunks, and need numbers in many countries with compliance records handled through an API.", "strengths": [ "A public OpenAPI 3.0.3 document describes 107 operations on 67 paths, and 105 of them carry a description of purpose and behaviour", "Every docs page has a Markdown twin, with llms.txt indexes on both sites, an OpenAPI discovery manifest and an MCP server card", "A sandbox at `https://sandbox-api.didww.com/v3` is free, separate from production, and funded with Stripe test cards", "The versioning policy says released dated API versions are never retired, and an account stays on its version until a person upgrades it", "The MCP server shows a server-side preview and waits for confirmation before purchases, deletions and PSTN rate acceptance, and a confirmation works once", "Official SDKs for TypeScript, Python, PHP, Java, Go, .NET and Ruby are public under MIT, with Ruby, Python and TypeScript tagged on 7 October 2026" ], "weaknesses": [ "No per-number or per-minute price is published. Price lists are sent on request or shown inside an account, and a $30 balance is needed before ordering", "REST API keys reach the whole account. An optional source IP allow list is the only restriction, with no scopes and no read-only key", "No idempotency key was found on `POST /orders`, which charges the prepaid balance at once, so a retried request can buy twice", "The API cannot place, answer, record or stream a call. Calls run over the customer's own SIP system, and Call Events webhooks are switched on by support", "Outbound trunks need an approved application from a business account with a company name and VAT or tax ID", "Callback signing moved from an API key to a separate callback secret on 6 October 2026, and the 2026-04-16 changelog page does not record it", "No security.txt, disclosure policy, bug bounty, uptime SLA, data processing agreement or sub-processor list was found", "The terms forbid auto-dialling, telemarketing and continuous or extensive call forwarding, which matters before an agent places outbound calls" ], "agentNotes": [ "Send `Api-Key: \u003ckey\u003e` with no `Bearer` prefix, plus `Accept: application/vnd.api+json`, and `Content-Type: application/vnd.api+json` on every request with a body", "Set `X-DIDWW-API-Version: 2026-04-16` on each request and read `meta.api_version` in the reply. A header older than the account's version is ignored", "Before retrying a timed-out `POST /orders`, list `GET /orders` first. The order is charged to the balance at once and no idempotency key exists", "Stay under 20 requests a second per key. On `429` wait before retrying, since no `Retry-After` header is documented", "Use `fields[...]`, `filter[...]`, `include` and `page[size]` (default 50, maximum 100) to keep JSON:API replies small", "Check `GET /address_requirements` before buying a number. Many countries need a verified identity and address, and the sandbox cannot run identity verification", "Create and enable a callback secret in the User Panel before relying on callbacks. Without one nothing is sent, and receivers must verify `X-DIDWW-Signature`" ], "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": 65.1 } ], "editorialScores": { "ergonomics": 77, "maintenance": 83, "payments": 15, "reliability": 66, "schema": 87, "security": 57, "transparency": 55 }, "provenanceScore": 85 }, "connect": { "install": "npm install @didww/sdk", "http": "GET https://api.didww.com/v3/countries\nApi-Key: YOUR_API_KEY\nX-DIDWW-API-Version: 2026-04-16\nAccept: application/vnd.api+json" }, "letme": { "capability": "https://letme.dev/voice.numbers", "tool": "https://letme.dev/didww-voice-and-number-management" }, "area": "voice", "provenance": { "legalEntity": "DIDWW Ireland Limited", "domain": "didww.com", "domainRegistered": "2006-01-16", "endpointOnVendorDomain": true, "terms": "https://www.didww.com/DIDWW-Terms-and-Agreements", "privacy": "https://www.didww.com/privacy-notice", "statusPage": "https://status.didww.com", "changelog": "https://doc.didww.com/api3/2026-04-16/changelog.html", "securityTxt": "none", "checked": "2026-10-09", "notes": [ "The terms link is the DIDWW Terms and Agreements, Rev 3.1, copyright 2026, between the customer and DIDWW Ireland Limited of 25 North Wall Quay, Dublin 1. It covers all DIDWW services and refers to a Service Appendix.", "The Privacy Notice is Rev 2.1, copyright 2025. It gives the company number as 473521 and names gdpr@didww.com for requests. No data processing agreement or sub-processor list was found.", "The REST API and the MCP server answer on api.didww.com and the sandbox on sandbox-api.didww.com.", "The status page runs on Instatus with eight components, among them DIDWW API, Inbound Voice and Outbound Voice.", "https://www.didww.com/.well-known/security.txt returned 404.", "RDAP for didww.com gives a registration date of 2006-01-16.", "The changelog link is the page for API version 2026-04-16. Its entries are not dated. Dated revisions are in the commit history of github.com/didww/didww-api-3-openapi.", "No clause on automated access, scraping or benchmarking was found in the Terms and Agreements. robots.txt on www.didww.com and doc.didww.com allows the pages read.", "https://api.didww.com/robots.txt answered 403, so no request was sent to that host and the OAuth metadata was not read." ], "score": 85 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/didww-voice-and-number-management.json", "live": { "slug": "didww-voice-and-number-management", "probe": { "target": "https://api.didww.com/mcp", "method": "get", "lastAt": "2026-10-10T03:07:03.494188648Z", "lastOk": true, "lastStatus": 401, "lastMs": 395, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 394, "p95ms24h": 527, "samples24h": 117, "samples30d": 117, "days": [ { "date": "2026-10-09", "probes": 85, "ok": 85 }, { "date": "2026-10-10", "probes": 32, "ok": 32 } ] }, "vendorStatus": { "page": "https://status.didww.com", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-10T00:50:25.908796867Z" }, "versions": [ { "registry": "npm", "name": "@didww/sdk", "version": "3.1.1", "seenAt": "2026-10-09T16:49:43.396621514Z" }, { "registry": "pypi", "name": "didww", "version": "3.2.0", "released": "2026-10-08", "seenAt": "2026-10-09T16:49:44.365849676Z" } ], "githubStars": 10, "npmWeekly": 462, "pypiWeekly": 915, "pages": [ { "url": "https://doc.didww.com/api3/2026-04-16/changelog.html", "kind": "changelog", "status": 200, "checkedAt": "2026-10-09T18:36:22.294016104Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "7d9c86f4f536" }, { "url": "https://www.didww.com/pricing.md", "kind": "pricing", "status": 200, "checkedAt": "2026-10-09T18:49:33.776952203Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "60eebb22a63e" }, { "url": "https://www.didww.com/privacy-notice", "kind": "privacy", "status": 200, "checkedAt": "2026-10-09T18:49:35.769637352Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "a193b3f64bb0" }, { "url": "https://www.didww.com/DIDWW-Terms-and-Agreements", "kind": "terms", "status": 200, "checkedAt": "2026-10-09T18:49:31.750868001Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "2568f2c611f6" } ], "updatedAt": "2026-10-10T03:07:03.494188648Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Bandwidth", "b": "DIDWW Ireland Limited", "name": "Vendor" }, { "a": "https://voice.bandwidth.com/api/v2", "b": "https://api.didww.com/mcp", "name": "Hosted endpoint" }, { "a": "HTTP, stdio, Streamable HTTP", "b": "HTTP", "name": "Transports" }, { "a": "OAuth", "b": "API key", "name": "Auth" }, { "a": "Pay per use", "b": "Pay per use", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "none", "b": "Proprietary service under the DIDWW Terms and Agreements (Rev 3.1). The OpenAPI repository and the official SDKs 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": "2026-10-07", "name": "Last release" }, { "a": "2025-09-11", "b": "no date given", "name": "Terms last updated" }, { "a": "2026-08-25", "b": "no date given", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms or service can change without notice" }, { "a": "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": "10 stars, 462 npm/wk", "name": "Popularity" }, { "a": "3/5 (2)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "DIDWW Voice and Number Management API scores 65.1 (B) on agent readiness against Bandwidth Voice API + MCP's 63.7 (B), and leads in 4 of 7 scored categories. Bandwidth Voice API + MCP leads on payments \u0026 pricing.", "question": "Which is better for AI agents, Bandwidth Voice API + MCP or DIDWW Voice and Number Management API?" }, { "answer": "Bandwidth Voice API + MCP uses an OAuth sign-in. DIDWW Voice and Number Management API needs an API key.", "question": "Do Bandwidth Voice API + MCP and DIDWW Voice and Number Management API need an API key?" }, { "answer": "Yes. Bandwidth Voice API + MCP has a hosted endpoint at https://voice.bandwidth.com/api/v2 and DIDWW Voice and Number Management API at https://api.didww.com/mcp.", "question": "Can an agent call Bandwidth Voice API + MCP and DIDWW Voice and Number Management API without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Payments \u0026 pricing, 35 against 15" ], "also": [ "Runs on your own machine", "Free to start without a card" ], "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": [ "Reliability, 66 against 58", "Agent ergonomics, 77 against 65", "Maintenance \u0026 community, 83 against 78", "Transparency \u0026 trust, 70 against 63" ], "also": null, "goodFor": "Teams that run their own SIP system, or a voice agent platform that accepts SIP trunks, and need numbers in many countries with compliance records handled through an API.", "slug": "didww-voice-and-number-management", "watchFor": "No per-number or per-minute price is published. Price lists are sent on request or shown inside an account, and a $30 balance is needed before ordering" } ], "job": { "capability": "voice.numbers", "name": "Phone numbers" }, "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-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-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/didww-voice-and-number-management-vs-exotel-voice.json", "title": "DIDWW Voice and Number Management API vs Exotel Voice API + MCP", "url": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-exotel-voice" }, { "json": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-infobip-calls.json", "title": "DIDWW Voice and Number Management API vs Infobip Calls API + MCP", "url": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-infobip-calls" }, { "json": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-livekit-telephony.json", "title": "DIDWW Voice and Number Management API vs LiveKit Telephony", "url": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-livekit-telephony" }, { "json": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-plivo-voice.json", "title": "DIDWW Voice and Number Management API vs Plivo Voice API", "url": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-plivo-voice" }, { "json": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-signalwire-voice.json", "title": "DIDWW Voice and Number Management API vs SignalWire Voice API", "url": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-signalwire-voice" }, { "json": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-sinch-voice.json", "title": "DIDWW Voice and Number Management API vs Sinch Voice API + MCP", "url": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-sinch-voice" }, { "json": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-telnyx-voice.json", "title": "DIDWW Voice and Number Management API vs Telnyx Voice API + MCP", "url": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-telnyx-voice" }, { "json": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-twilio-voice.json", "title": "DIDWW Voice and Number Management API vs Twilio Programmable Voice API + MCP", "url": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-twilio-voice" }, { "json": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-vonage-voice.json", "title": "DIDWW Voice and Number Management API vs Vonage Voice API + MCP", "url": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-vonage-voice" }, { "json": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-voximplant.json", "title": "DIDWW Voice and Number Management API vs Voximplant", "url": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-voximplant" }, { "json": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-jambonz.json", "title": "DIDWW Voice and Number Management API vs jambonz", "url": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-jambonz" } ], "scores": [ { "bandwidth-voice": 58, "by": 8, "didww-voice-and-number-management": 66, "edge": "didww-voice-and-number-management", "key": "reliability", "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "bandwidth-voice": 88, "by": 1, "didww-voice-and-number-management": 87, "edge": "bandwidth-voice", "key": "schema", "name": "Schema \u0026 documentation", "weight": 13 }, { "bandwidth-voice": 65, "by": 12, "didww-voice-and-number-management": 77, "edge": "didww-voice-and-number-management", "key": "ergonomics", "name": "Agent ergonomics", "weight": 13 }, { "bandwidth-voice": 60, "by": 3, "didww-voice-and-number-management": 57, "edge": "bandwidth-voice", "key": "security", "name": "Security \u0026 auth", "weight": 14 }, { "bandwidth-voice": 35, "by": 20, "didww-voice-and-number-management": 15, "edge": "bandwidth-voice", "key": "payments", "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "bandwidth-voice": 78, "by": 5, "didww-voice-and-number-management": 83, "edge": "didww-voice-and-number-management", "key": "maintenance", "name": "Maintenance \u0026 community", "weight": 7 }, { "bandwidth-voice": 63, "by": 7, "didww-voice-and-number-management": 70, "edge": "didww-voice-and-number-management", "key": "transparency", "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "DIDWW Voice and Number Management API scores 65.1 (B) on agent readiness against Bandwidth Voice API + MCP's 63.7 (B), and leads in 4 of 7 scored categories. Bandwidth Voice API + MCP leads on payments \u0026 pricing. Both do phone numbers.", "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.", "didww-voice-and-number-management": "An OpenAPI 3.0.3 document with 107 operations, Markdown docs, a free sandbox and SDKs in seven languages cover number ordering and SIP trunk set-up. No per-number or per-minute price is public, API keys carry no scopes, orders have no idempotency key, and outbound calling needs an approved application. Calls travel over SIP only." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-didww-voice-and-number-management", "json": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-didww-voice-and-number-management.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-didww-voice-and-number-management.md", "slim": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-didww-voice-and-number-management.min.md" }, "markdown": "DIDWW Voice and Number Management API scores 65.1 (B) on agent readiness against Bandwidth Voice API + MCP's 63.7 (B), and leads in 4 of 7 scored categories. Bandwidth Voice API + MCP leads on payments \u0026 pricing. Both do phone numbers.\n\n- Bandwidth Voice API + MCP: grade B, 63.7/100, rank #374 of 950. Markdown https://www.anchorterminal.com/tools/bandwidth-voice.md · JSON https://www.anchorterminal.com/api/v1/tools/bandwidth-voice.json\n- DIDWW Voice and Number Management API: grade B, 65.1/100, rank #330 of 950. Markdown https://www.anchorterminal.com/tools/didww-voice-and-number-management.md · JSON https://www.anchorterminal.com/api/v1/tools/didww-voice-and-number-management.json\n- Best phone calling and voice transport APIs for AI agents: https://www.anchorterminal.com/best/voice-calling/index.md\n- All 78 calling comparisons: https://www.anchorterminal.com/compare/voice-calling/index.md\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- Payments \u0026 pricing, 35 against 15\n\nAlso in its favour:\n- Runs on your own machine\n- Free to start without a card\n\nWatch for: Number rental and SIP trunking prices aren't published\n\n### DIDWW Voice and Number Management API (B)\n\nGood for: Teams that run their own SIP system, or a voice agent platform that accepts SIP trunks, and need numbers in many countries with compliance records handled through an API.\n\nAhead on:\n- Reliability, 66 against 58\n- Agent ergonomics, 77 against 65\n- Maintenance \u0026 community, 83 against 78\n- Transparency \u0026 trust, 70 against 63\n\nWatch for: No per-number or per-minute price is published. Price lists are sent on request or shown inside an account, and a $30 balance is needed before ordering\n\n\n## Score by category\n\n| Category | Weight | Bandwidth Voice API + MCP | DIDWW Voice and Number Management API | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 58 | 66 | DIDWW Voice and Number Management API +8 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 88 | 87 | Bandwidth Voice API + MCP +1 |\n| Agent ergonomics | 13% (16.2 this run) | 65 | 77 | DIDWW Voice and Number Management API +12 |\n| Security \u0026 auth | 14% (17.5 this run) | 60 | 57 | Bandwidth Voice API + MCP +3 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 35 | 15 | Bandwidth Voice API + MCP +20 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 78 | 83 | DIDWW Voice and Number Management API +5 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 63 | 70 | DIDWW Voice and Number Management API +7 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **63.7 · B** | **65.1 · B** | |\n\n## Facts side by side\n\n| Fact | Bandwidth Voice API + MCP | DIDWW Voice and Number Management API |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Bandwidth | DIDWW Ireland Limited |\n| Hosted endpoint | `https://voice.bandwidth.com/api/v2` | `https://api.didww.com/mcp` |\n| Transports | HTTP, stdio, Streamable HTTP | HTTP |\n| Auth | OAuth | API key |\n| Pricing | Pay per use | Pay per use |\n| x402 | no | no |\n| Licence | none | Proprietary service under the DIDWW Terms and Agreements (Rev 3.1). The OpenAPI repository and the official SDKs are MIT |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-09-22 | 2026-10-07 |\n| Terms last updated | 2025-09-11 | no date given |\n| Privacy policy last updated | 2026-08-25 | no date given |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | not found in the text | not found in the text |\n| Terms restrict benchmarking | not found in the text | not found in the text |\n| Terms or service can change without notice | not found in the text | not found in the text |\n| Arbitration or class-action waiver | not found in the text | not found in the text |\n| Popularity | 2 stars, 13k npm/wk, 39k PyPI/wk | 10 stars, 462 npm/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**DIDWW Voice and Number Management API.** An OpenAPI 3.0.3 document with 107 operations, Markdown docs, a free sandbox and SDKs in seven languages cover number ordering and SIP trunk set-up. No per-number or per-minute price is public, API keys carry no scopes, orders have no idempotency key, and outbound calling needs an approved application. Calls travel over SIP only.\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### DIDWW Voice and Number Management API\n\n1. Send `Api-Key: \u003ckey\u003e` with no `Bearer` prefix, plus `Accept: application/vnd.api+json`, and `Content-Type: application/vnd.api+json` on every request with a body\n2. Set `X-DIDWW-API-Version: 2026-04-16` on each request and read `meta.api_version` in the reply. A header older than the account's version is ignored\n3. Before retrying a timed-out `POST /orders`, list `GET /orders` first. The order is charged to the balance at once and no idempotency key exists\n4. Stay under 20 requests a second per key. On `429` wait before retrying, since no `Retry-After` header is documented\n5. Use `fields[...]`, `filter[...]`, `include` and `page[size]` (default 50, maximum 100) to keep JSON:API replies small\n6. Check `GET /address_requirements` before buying a number. Many countries need a verified identity and address, and the sandbox cannot run identity verification\n7. Create and enable a callback secret in the User Panel before relying on callbacks. Without one nothing is sent, and receivers must verify `X-DIDWW-Signature`\n\n## Questions\n\n### Which is better for AI agents, Bandwidth Voice API + MCP or DIDWW Voice and Number Management API?\n\nDIDWW Voice and Number Management API scores 65.1 (B) on agent readiness against Bandwidth Voice API + MCP's 63.7 (B), and leads in 4 of 7 scored categories. Bandwidth Voice API + MCP leads on payments \u0026 pricing.\n\n### Do Bandwidth Voice API + MCP and DIDWW Voice and Number Management API need an API key?\n\nBandwidth Voice API + MCP uses an OAuth sign-in. DIDWW Voice and Number Management API needs an API key.\n\n### Can an agent call Bandwidth Voice API + MCP and DIDWW Voice and Number Management API without installing anything?\n\nYes. Bandwidth Voice API + MCP has a hosted endpoint at https://voice.bandwidth.com/api/v2 and DIDWW Voice and Number Management API at https://api.didww.com/mcp.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/bandwidth-voice-vs-didww-voice-and-number-management.json, and with the fewest tokens: https://www.anchorterminal.com/compare/bandwidth-voice-vs-didww-voice-and-number-management.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"bandwidth-voice\", \"b\": \"didww-voice-and-number-management\"}`. From a terminal: `anchor compare bandwidth-voice didww-voice-and-number-management`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/bandwidth-voice.json and https://www.anchorterminal.com/api/v1/tools/didww-voice-and-number-management.json\n\n## Other comparisons with Bandwidth Voice API + MCP or DIDWW Voice and Number Management API\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 jambonz](https://www.anchorterminal.com/compare/bandwidth-voice-vs-jambonz.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- [DIDWW Voice and Number Management API vs Exotel Voice API + MCP](https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-exotel-voice.md)\n- [DIDWW Voice and Number Management API vs Infobip Calls API + MCP](https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-infobip-calls.md)\n- [DIDWW Voice and Number Management API vs LiveKit Telephony](https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-livekit-telephony.md)\n- [DIDWW Voice and Number Management API vs Plivo Voice API](https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-plivo-voice.md)\n- [DIDWW Voice and Number Management API vs SignalWire Voice API](https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-signalwire-voice.md)\n- [DIDWW Voice and Number Management API vs Sinch Voice API + MCP](https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-sinch-voice.md)\n- [DIDWW Voice and Number Management API vs Telnyx Voice API + MCP](https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-telnyx-voice.md)\n- [DIDWW Voice and Number Management API vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-twilio-voice.md)\n- [DIDWW Voice and Number Management API vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-vonage-voice.md)\n- [DIDWW Voice and Number Management API vs Voximplant](https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-voximplant.md)\n- [DIDWW Voice and Number Management API vs jambonz](https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-jambonz.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-10", "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 DIDWW Voice and Number Management API", "url": "" } ], "description": "DIDWW Voice and Number Management scores 65.1 (B) to Bandwidth Voice's 63.7 (B) for phone numbers. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Bandwidth Voice API + MCP B 63.7", "DIDWW Voice and Number Management API B 65.1", "scores" ], "h1": "Bandwidth Voice API + MCP vs DIDWW Voice and Number Management API", "image": "https://www.anchorterminal.com/assets/og/compare-bandwidth-voice-vs-didww-voice-and-number-management.png", "path": "/compare/bandwidth-voice-vs-didww-voice-and-number-management", "published": "2026-10-01", "section": "tools", "title": "Bandwidth Voice vs DIDWW Voice and Number Management (2026)", "toc": null, "updated": "2026-10-09", "url": "https://www.anchorterminal.com/compare/bandwidth-voice-vs-didww-voice-and-number-management" }, "tokens": { "markdown": 2950, "slim": 680 }, "version": 1 }