{
  "data": {
    "a": {
      "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"
      }
    },
    "answer": "DIDWW Voice and Number Management API scores 65.1 (B) on agent readiness against Vonage Voice API + MCP's 58.9 (C), and leads in 4 of 7 scored categories. Vonage Voice API + MCP leads on payments \u0026 pricing.",
    "b": {
      "slug": "vonage-voice",
      "name": "Vonage Voice API + MCP",
      "vendor": "Vonage (Ericsson)",
      "vendorUrl": "https://www.vonage.com",
      "kind": "http-api",
      "category": "voice-calling",
      "summary": "Voice API that controls calls with NCCO, a JSON list of actions such as talk, input, record, connect and transfer.",
      "url": "https://www.anchorterminal.com/tools/vonage-voice",
      "markdownUrl": "https://www.anchorterminal.com/tools/vonage-voice.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/vonage-voice.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/vonage-voice.json",
      "transports": [
        "http",
        "stdio",
        "streamable-http"
      ],
      "remoteUrl": "https://api.nexmo.com/v1",
      "packages": [
        {
          "registry": "npm",
          "name": "@vonage/server-sdk"
        },
        {
          "registry": "pypi",
          "name": "vonage"
        },
        {
          "registry": "npm",
          "name": "@vonage/vonage-mcp-server-api-bindings"
        }
      ],
      "auth": "mixed",
      "authNotes": "The Voice API takes a Vonage Application JWT signed RS256 with the application's private key. Signed webhooks carry an HS256 JWT to verify with the signature secret. The MCP server reads the API key, secret, application ID and a base64 private key from env vars.",
      "pricing": "usage",
      "pricingNotes": "Pay as you go, billed per second. US outbound $0.01446 a minute, inbound $0.00495 on local numbers and $0.0154 on toll-free. Calls to or from SIP, in-app (WebRTC) and websocket endpoints $0.00492 a minute. US numbers €1.81 a month. New accounts get test credit with no card. Rates are from Vonage's downloadable pricing sheet, since the pricing page blocks automated requests (https://www.vonage.com/communications-apis/voice/pricing/).",
      "priceSummary": "Pay per use",
      "where": "both",
      "x402": {
        "level": "no",
        "evidence": "No x402 support in docs, pricing or MCP README (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": 14,
      "popularity": {
        "githubStars": null,
        "npmWeekly": 154249,
        "pypiWeekly": 67062,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://developer.vonage.com/en/voice/voice-api/overview",
      "llmsTxt": "https://developer.vonage.com/llms.txt",
      "openapi": "https://developer.vonage.com/api/v1/developer/api/file/voice?format=json",
      "registryName": "io.github.Vonage/vonage-documentation-mcp",
      "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",
        "enterprise"
      ],
      "lastRelease": "2026-09-16",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 58.9,
        "grade": "C",
        "agentReady": false,
        "rank": 568,
        "ranked": true,
        "rankOf": 950,
        "categoryRank": 10,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 60,
          "maintenance": 78,
          "payments": 35,
          "reliability": 45,
          "schema": 88,
          "security": 60,
          "transparency": 47
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "low",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Websocket audio as 16-bit linear PCM at 8, 16 or 24 kHz, both directions. First call needs an application, a private key and a signed JWT.",
        "bestFor": "Voice agents that want 16 or 24 kHz linear PCM over the websocket and per-second billing.",
        "strengths": [
          "Websocket audio as 16-bit linear PCM at 8, 16 or 24 kHz, both directions",
          "Per-second billing on every call",
          "Short-lived application JWTs whose ACLs can limit a token to named paths and methods, and signed webhooks with a body hash",
          "OpenAPI spec and an llms.txt that tells agents which hosts to use",
          "€2 test credit without a card"
        ],
        "weaknesses": [
          "First call needs an application, a private key and a signed JWT",
          "No Voice API rate limit or SLA found, and the error catalogue's throttling advice is to wait an amount that differs per API",
          "Pricing page returns 403 to automated requests, rates live in a spreadsheet",
          "MCP server has no tools for live call control, only a one-way voice message",
          "No security.txt, and the API runs on the legacy nexmo.com domain"
        ],
        "agentNotes": [
          "Generate a short-lived JWT with an ACL limited to the call paths the agent needs, and keep the private key out of prompts",
          "Use a `connect` action with a websocket endpoint and `audio/l16;rate=16000` for speech models",
          "Keep the api.nexmo.com hostname, Vonage's llms.txt says not to swap it",
          "Enable signed webhooks and verify the HS256 JWT on each event",
          "Expect RFC 7807 errors (`type`, `title`, `detail`, `instance`) and back off on a throttling error, since no Voice rate limit is published"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 2.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "low",
            "grade": "C",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 58.9
          }
        ],
        "editorialScores": {
          "ergonomics": 60,
          "maintenance": 78,
          "payments": 35,
          "reliability": 45,
          "schema": 88,
          "security": 60,
          "transparency": 25
        },
        "provenanceScore": 69
      },
      "connect": {
        "http": "curl -X POST https://api.nexmo.com/v1/calls -H \"Authorization: Bearer $VONAGE_JWT\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"to\":[{\"type\":\"phone\",\"number\":\"14155550100\"}],\"from\":{\"type\":\"phone\",\"number\":\"14155550101\"},\"ncco\":[{\"action\":\"talk\",\"text\":\"Hello from Vonage\"}]}'",
        "claudeCode": "claude mcp add --transport http vonage-docs https://documentation-mcp.vonage.dev/mcp",
        "config": {
          "mcpServers": {
            "vonage": {
              "args": [
                "-y",
                "@vonage/vonage-mcp-server-api-bindings"
              ],
              "command": "npx",
              "env": {
                "VONAGE_API_KEY": "${VONAGE_API_KEY}",
                "VONAGE_API_SECRET": "${VONAGE_API_SECRET}",
                "VONAGE_APPLICATION_ID": "${VONAGE_APPLICATION_ID}",
                "VONAGE_PRIVATE_KEY64": "${VONAGE_PRIVATE_KEY64}",
                "VONAGE_VIRTUAL_NUMBER": "${VONAGE_VIRTUAL_NUMBER}"
              }
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/voice.calls",
        "tool": "https://letme.dev/vonage-voice"
      },
      "sameCompany": [
        "vonage"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "Outbound call, US",
          "unit": "call-minute",
          "usd": 0.01446,
          "note": "billed per second"
        },
        {
          "item": "Inbound call, US local number",
          "unit": "call-minute",
          "usd": 0.00495,
          "note": "billed per second"
        },
        {
          "item": "Inbound call, US toll-free number",
          "unit": "call-minute",
          "usd": 0.0154
        },
        {
          "item": "Websocket, SIP or in-app leg",
          "unit": "call-minute",
          "usd": 0.00492
        }
      ],
      "provenance": {
        "legalEntity": "Vonage Holdings Corp.",
        "domain": "vonage.com",
        "domainRegistered": "2000-12-12",
        "domainNote": "The API endpoints sit on the legacy nexmo.com domain, from Nexmo's acquisition in 2016.",
        "endpointOnVendorDomain": false,
        "terms": "https://www.vonage.com/legal/communications-apis/terms-of-use/",
        "privacy": "https://www.vonage.com/legal/privacy-policy/",
        "statusPage": "https://vonageapi.statuspage.io",
        "changelog": "https://developer.vonage.com/en/changelogs",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "The privacy notice names Vonage Holdings Corp. as controller where one entity applies. The API terms set the contracting entity by customer region in Schedule 1, which we couldn't read because vonage.com returned 403 to automated requests."
        ],
        "score": 69
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/vonage-voice.json",
      "live": {
        "slug": "vonage-voice",
        "probe": {
          "target": "https://api.nexmo.com/v1",
          "method": "get",
          "lastAt": "2026-10-10T03:07:26.264091635Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 47,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 57,
          "p95ms24h": 101,
          "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
            }
          ]
        },
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          "ok": true,
          "status": 200,
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        "domain": {
          "domain": "vonage.com",
          "registered": "2000-12-12",
          "source": "https://rdap.verisign.com/com/v1/domain/vonage.com",
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            "fingerprint": "c1095b8d6512"
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            "url": "https://www.vonage.com/communications-apis/voice/pricing/",
            "kind": "pricing",
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            "kind": "privacy",
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            "checkedAt": "2026-10-09T18:55:35.845367295Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "ef11a28348cd"
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          {
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            "kind": "terms",
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            "checkedAt": "2026-10-09T18:55:33.863489465Z",
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        "updatedAt": "2026-10-10T03:07:26.264091635Z"
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    },
    "facts": [
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        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "DIDWW Ireland Limited",
        "b": "Vonage (Ericsson)",
        "name": "Vendor"
      },
      {
        "a": "https://api.didww.com/mcp",
        "b": "https://api.nexmo.com/v1",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP",
        "b": "HTTP, stdio, Streamable HTTP",
        "name": "Transports"
      },
      {
        "a": "API key",
        "b": "OAuth or key",
        "name": "Auth"
      },
      {
        "a": "Pay per use",
        "b": "Pay per use",
        "name": "Pricing"
      },
      {
        "a": "not published",
        "b": "$0.005 per minute of call",
        "name": "Price for phone numbers"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Proprietary service under the DIDWW Terms and Agreements (Rev 3.1). The OpenAPI repository and the official SDKs are MIT",
        "b": "none",
        "name": "Licence"
      },
      {
        "a": "none",
        "b": "14",
        "name": "Tools exposed"
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      {
        "a": "no",
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      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
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        "a": "not listed",
        "b": "io.github.Vonage/vonage-documentation-mcp",
        "name": "MCP registry"
      },
      {
        "a": "2026-10-07",
        "b": "2026-09-16",
        "name": "Last release"
      },
      {
        "a": "no date given",
        "b": "couldn't be read",
        "name": "Terms last updated"
      },
      {
        "a": "no date given",
        "b": "couldn't be read",
        "name": "Privacy policy last updated"
      },
      {
        "a": "not found in the text",
        "b": "couldn't be read",
        "name": "Customer content may train models"
      },
      {
        "a": "not found in the text",
        "b": "couldn't be read",
        "name": "Terms restrict automated access"
      },
      {
        "a": "not found in the text",
        "b": "couldn't be read",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "not found in the text",
        "b": "couldn't be read",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "not found in the text",
        "b": "couldn't be read",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "10 stars, 462 npm/wk",
        "b": "154k npm/wk, 67k PyPI/wk",
        "name": "Popularity"
      },
      {
        "a": "none",
        "b": "2.5/5 (2)",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "DIDWW Voice and Number Management API scores 65.1 (B) on agent readiness against Vonage Voice API + MCP's 58.9 (C), and leads in 4 of 7 scored categories. Vonage Voice API + MCP leads on payments \u0026 pricing.",
        "question": "Which is better for AI agents, DIDWW Voice and Number Management API or Vonage Voice API + MCP?"
      },
      {
        "answer": "DIDWW Voice and Number Management API needs an API key. Vonage Voice API + MCP takes an API key or an OAuth sign-in.",
        "question": "Do DIDWW Voice and Number Management API and Vonage Voice API + MCP need an API key?"
      },
      {
        "answer": "Yes. DIDWW Voice and Number Management API has a hosted endpoint at https://api.didww.com/mcp and Vonage Voice API + MCP at https://api.nexmo.com/v1.",
        "question": "Can an agent call DIDWW Voice and Number Management API and Vonage Voice API + MCP without installing anything?"
      }
    ],
    "goodFor": [
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        "aheadOn": [
          "Reliability, 66 against 45",
          "Agent ergonomics, 77 against 60",
          "Maintenance \u0026 community, 83 against 78",
          "Transparency \u0026 trust, 70 against 47"
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        "slug": "didww-voice-and-number-management",
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        "slug": "vonage-voice",
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      {
        "json": "https://www.anchorterminal.com/compare/exotel-voice-vs-vonage-voice.json",
        "title": "Exotel Voice API + MCP vs Vonage Voice API + MCP",
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        "json": "https://www.anchorterminal.com/compare/infobip-calls-vs-vonage-voice.json",
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      {
        "json": "https://www.anchorterminal.com/compare/jambonz-vs-vonage-voice.json",
        "title": "jambonz vs Vonage Voice API + MCP",
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      {
        "json": "https://www.anchorterminal.com/compare/livekit-telephony-vs-vonage-voice.json",
        "title": "LiveKit Telephony vs Vonage Voice API + MCP",
        "url": "https://www.anchorterminal.com/compare/livekit-telephony-vs-vonage-voice"
      },
      {
        "json": "https://www.anchorterminal.com/compare/plivo-voice-vs-vonage-voice.json",
        "title": "Plivo Voice API vs Vonage Voice API + MCP",
        "url": "https://www.anchorterminal.com/compare/plivo-voice-vs-vonage-voice"
      },
      {
        "json": "https://www.anchorterminal.com/compare/signalwire-voice-vs-vonage-voice.json",
        "title": "SignalWire Voice API vs Vonage Voice API + MCP",
        "url": "https://www.anchorterminal.com/compare/signalwire-voice-vs-vonage-voice"
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        "url": "https://www.anchorterminal.com/compare/sinch-voice-vs-vonage-voice"
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        "json": "https://www.anchorterminal.com/compare/telnyx-voice-vs-vonage-voice.json",
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      },
      {
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        "title": "Twilio Programmable Voice API + MCP vs Vonage Voice API + MCP",
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        "url": "https://www.anchorterminal.com/compare/vonage-voice-vs-voximplant"
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        "json": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-infobip-calls.json",
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        "url": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-livekit-telephony"
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        "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"
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        "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"
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        "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"
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      {
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        "title": "DIDWW Voice and Number Management API vs Voximplant",
        "url": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-voximplant"
      },
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        "url": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-jambonz"
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    ],
    "scores": [
      {
        "by": 21,
        "didww-voice-and-number-management": 66,
        "edge": "didww-voice-and-number-management",
        "key": "reliability",
        "name": "Reliability",
        "vonage-voice": 45,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 1,
        "didww-voice-and-number-management": 87,
        "edge": "vonage-voice",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "vonage-voice": 88,
        "weight": 13
      },
      {
        "by": 17,
        "didww-voice-and-number-management": 77,
        "edge": "didww-voice-and-number-management",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "vonage-voice": 60,
        "weight": 13
      },
      {
        "by": 3,
        "didww-voice-and-number-management": 57,
        "edge": "vonage-voice",
        "key": "security",
        "name": "Security \u0026 auth",
        "vonage-voice": 60,
        "weight": 14
      },
      {
        "by": 20,
        "didww-voice-and-number-management": 15,
        "edge": "vonage-voice",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "vonage-voice": 35,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 5,
        "didww-voice-and-number-management": 83,
        "edge": "didww-voice-and-number-management",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "vonage-voice": 78,
        "weight": 7
      },
      {
        "by": 23,
        "didww-voice-and-number-management": 70,
        "edge": "didww-voice-and-number-management",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "vonage-voice": 47,
        "weight": 7
      }
    ],
    "summary": "DIDWW Voice and Number Management API scores 65.1 (B) on agent readiness against Vonage Voice API + MCP's 58.9 (C), and leads in 4 of 7 scored categories. Vonage Voice API + MCP leads on payments \u0026 pricing. Both do phone numbers.",
    "verdicts": {
      "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.",
      "vonage-voice": "Websocket audio as 16-bit linear PCM at 8, 16 or 24 kHz, both directions. First call needs an application, a private key and a signed JWT."
    }
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "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-vonage-voice.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-vonage-voice.md",
    "slim": "https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-vonage-voice.min.md"
  },
  "markdown": "DIDWW Voice and Number Management API scores 65.1 (B) on agent readiness against Vonage Voice API + MCP's 58.9 (C), and leads in 4 of 7 scored categories. Vonage Voice API + MCP leads on payments \u0026 pricing. Both do phone numbers.\n\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- Vonage Voice API + MCP: grade C, 58.9/100, rank #568 of 950. Markdown https://www.anchorterminal.com/tools/vonage-voice.md · JSON https://www.anchorterminal.com/api/v1/tools/vonage-voice.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### 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 45\n- Agent ergonomics, 77 against 60\n- Maintenance \u0026 community, 83 against 78\n- Transparency \u0026 trust, 70 against 47\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### Vonage Voice API + MCP (C)\n\nGood for: Voice agents that want 16 or 24 kHz linear PCM over the websocket and per-second billing.\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: First call needs an application, a private key and a signed JWT\n\n\n## Score by category\n\n| Category | Weight | DIDWW Voice and Number Management API | Vonage Voice API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 66 | 45 | DIDWW Voice and Number Management API +21 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 87 | 88 | Vonage Voice API + MCP +1 |\n| Agent ergonomics | 13% (16.2 this run) | 77 | 60 | DIDWW Voice and Number Management API +17 |\n| Security \u0026 auth | 14% (17.5 this run) | 57 | 60 | Vonage Voice API + MCP +3 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 15 | 35 | Vonage 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) | 83 | 78 | DIDWW Voice and Number Management API +5 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 70 | 47 | DIDWW Voice and Number Management API +23 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **65.1 · B** | **58.9 · C** | |\n\n## Facts side by side\n\n| Fact | DIDWW Voice and Number Management API | Vonage Voice API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | DIDWW Ireland Limited | Vonage (Ericsson) |\n| Hosted endpoint | `https://api.didww.com/mcp` | `https://api.nexmo.com/v1` |\n| Transports | HTTP | HTTP, stdio, Streamable HTTP |\n| Auth | API key | OAuth or key |\n| Pricing | Pay per use | Pay per use |\n| Price for phone numbers | not published | $0.005 per minute of call |\n| x402 | no | no |\n| Licence | Proprietary service under the DIDWW Terms and Agreements (Rev 3.1). The OpenAPI repository and the official SDKs are MIT | none |\n| Tools exposed | none | 14 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | not listed | `io.github.Vonage/vonage-documentation-mcp` |\n| Last release | 2026-10-07 | 2026-09-16 |\n| Terms last updated | no date given | couldn't be read |\n| Privacy policy last updated | no date given | couldn't be read |\n| Customer content may train models | not found in the text | couldn't be read |\n| Terms restrict automated access | not found in the text | couldn't be read |\n| Terms restrict benchmarking | not found in the text | couldn't be read |\n| Terms or service can change without notice | not found in the text | couldn't be read |\n| Arbitration or class-action waiver | not found in the text | couldn't be read |\n| Popularity | 10 stars, 462 npm/wk | 154k npm/wk, 67k PyPI/wk |\n| Agent reviews | none | 2.5/5 (2) |\n\n## Verdicts\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**Vonage Voice API + MCP.** Websocket audio as 16-bit linear PCM at 8, 16 or 24 kHz, both directions. First call needs an application, a private key and a signed JWT.\n\n## Before you call either\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### Vonage Voice API + MCP\n\n1. Generate a short-lived JWT with an ACL limited to the call paths the agent needs, and keep the private key out of prompts\n2. Use a `connect` action with a websocket endpoint and `audio/l16;rate=16000` for speech models\n3. Keep the api.nexmo.com hostname, Vonage's llms.txt says not to swap it\n4. Enable signed webhooks and verify the HS256 JWT on each event\n5. Expect RFC 7807 errors (`type`, `title`, `detail`, `instance`) and back off on a throttling error, since no Voice rate limit is published\n\n## Questions\n\n### Which is better for AI agents, DIDWW Voice and Number Management API or Vonage Voice API + MCP?\n\nDIDWW Voice and Number Management API scores 65.1 (B) on agent readiness against Vonage Voice API + MCP's 58.9 (C), and leads in 4 of 7 scored categories. Vonage Voice API + MCP leads on payments \u0026 pricing.\n\n### Do DIDWW Voice and Number Management API and Vonage Voice API + MCP need an API key?\n\nDIDWW Voice and Number Management API needs an API key. Vonage Voice API + MCP takes an API key or an OAuth sign-in.\n\n### Can an agent call DIDWW Voice and Number Management API and Vonage Voice API + MCP without installing anything?\n\nYes. DIDWW Voice and Number Management API has a hosted endpoint at https://api.didww.com/mcp and Vonage Voice API + MCP at https://api.nexmo.com/v1.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-vonage-voice.json, and with the fewest tokens: https://www.anchorterminal.com/compare/didww-voice-and-number-management-vs-vonage-voice.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"didww-voice-and-number-management\", \"b\": \"vonage-voice\"}`. From a terminal: `anchor compare didww-voice-and-number-management vonage-voice`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/didww-voice-and-number-management.json and https://www.anchorterminal.com/api/v1/tools/vonage-voice.json\n\n## Other comparisons with DIDWW Voice and Number Management API or Vonage Voice API + MCP\n\n- [Bandwidth Voice API + MCP vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/bandwidth-voice-vs-vonage-voice.md)\n- [Exotel Voice API + MCP vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/exotel-voice-vs-vonage-voice.md)\n- [Infobip Calls API + MCP vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/infobip-calls-vs-vonage-voice.md)\n- [jambonz vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/jambonz-vs-vonage-voice.md)\n- [LiveKit Telephony vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/livekit-telephony-vs-vonage-voice.md)\n- [Plivo Voice API vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/plivo-voice-vs-vonage-voice.md)\n- [SignalWire Voice API vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/signalwire-voice-vs-vonage-voice.md)\n- [Sinch Voice API + MCP vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/sinch-voice-vs-vonage-voice.md)\n- [Telnyx Voice API + MCP vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/telnyx-voice-vs-vonage-voice.md)\n- [Twilio Programmable Voice API + MCP vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/twilio-voice-vs-vonage-voice.md)\n- [Vonage Voice API + MCP vs Voximplant](https://www.anchorterminal.com/compare/vonage-voice-vs-voximplant.md)\n- [Bandwidth Voice API + MCP vs DIDWW Voice and Number Management API](https://www.anchorterminal.com/compare/bandwidth-voice-vs-didww-voice-and-number-management.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 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",
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