{
  "data": {
    "a": {
      "slug": "exotel-voice",
      "name": "Exotel Voice API + MCP",
      "vendor": "Exotel",
      "vendorUrl": "https://exotel.com",
      "kind": "http-api",
      "category": "voice-calling",
      "summary": "Indian cloud telephony API for click-to-call, call flows, virtual numbers (ExoPhones), SIP trunking and AgentStream, which streams call audio to your bot over WebSocket in both directions.",
      "url": "https://www.anchorterminal.com/tools/exotel-voice",
      "markdownUrl": "https://www.anchorterminal.com/tools/exotel-voice.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/exotel-voice.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/exotel-voice.json",
      "repo": "https://github.com/exotel/ExotelMCP",
      "license": "MIT",
      "transports": [
        "http",
        "streamable-http"
      ],
      "remoteUrl": "https://api.exotel.com/v1",
      "packages": [],
      "auth": "api-key",
      "authNotes": "HTTP Basic auth with API key and token, and the Account SID in the path. India-hosted accounts use api.in.exotel.com. The hosted MCP takes a JSON object with the base64 key and token in the Authorization header.",
      "pricing": "usage",
      "pricingNotes": "Pay as you go or bundled plans in INR, with a free trial and no card. Per-minute rates and plan prices aren't published on the Exotel site, they're quoted after signup or by sales. Numbers carry a one-time activation fee plus monthly rental (https://exotel.com/pricing/).",
      "priceSummary": "Pay per use",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402 or stablecoin payment path in the voice docs, pricing or llms.txt (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": 62,
      "popularity": {
        "githubStars": 5,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://developer.exotel.com/docs/voice",
      "capabilities": [
        "voice.calls",
        "voice.numbers",
        "voice.streaming",
        "voice.sip",
        "voice.recording",
        "voice.transfer"
      ],
      "tags": [
        "hosted",
        "no-card",
        "mcp",
        "webhooks",
        "streaming"
      ],
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 39.8,
        "grade": "E",
        "agentReady": false,
        "rank": 424,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 10,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 40,
          "maintenance": 5,
          "payments": 20,
          "reliability": 50,
          "schema": 48,
          "security": 40,
          "transparency": 63
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Local Indian numbers and DLT and TRAI handling. Per-minute rates and plan prices not published.",
        "strengths": [
          "Local Indian numbers and DLT and TRAI handling",
          "Hosted MCP with 62 tools that can place calls and manage VoiceBots",
          "AgentStream bidirectional audio with mark and clear events for barge-in",
          "No-card trial",
          "Error code dictionary and multi-language examples since February 2026"
        ],
        "weaknesses": [
          "Per-minute rates and plan prices not published",
          "No OpenAPI spec, llms.txt or official server SDK",
          "Changelog quiet since February 2026",
          "MCP tools carry no read-only or destructive annotations, and credentials travel as a JSON blob in a header",
          "No published rate limits or SLA, and no bug bounty or disclosure policy found"
        ],
        "agentNotes": [
          "Use api.in.exotel.com for India-hosted accounts and api.exotel.com for Singapore-hosted ones",
          "Pass StreamUrl on Calls/connect for a quick outbound voice-agent call",
          "Whitelist test numbers before calling on a trial account",
          "Pass confirm=true only after a person approves a destructive MCP tool call"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 2,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "E",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 39.8
          }
        ],
        "editorialScores": {
          "ergonomics": 40,
          "maintenance": 5,
          "payments": 20,
          "reliability": 50,
          "schema": 48,
          "security": 40,
          "transparency": 35
        },
        "provenanceScore": 90
      },
      "connect": {
        "http": "curl -u \"$EXOTEL_API_KEY:$EXOTEL_API_TOKEN\" -X POST \"https://api.exotel.com/v1/Accounts/$EXOTEL_SID/Calls/connect\" \\\n  -d From=+91XXXXXXXXXX -d To=+91XXXXXXXXXX -d CallerId=$EXOTEL_EXOPHONE",
        "claudeCode": "claude mcp add --transport http exotel https://mcp.exotel.com/mcp --header \"Authorization: $EXOTEL_MCP_AUTH_JSON\"",
        "config": {
          "mcpServers": {
            "exotel": {
              "headers": {
                "Authorization": "${EXOTEL_MCP_AUTH_JSON}"
              },
              "type": "http",
              "url": "https://mcp.exotel.com/mcp"
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/voice.calls",
        "tool": "https://letme.dev/exotel-voice"
      },
      "area": "voice",
      "provenance": {
        "legalEntity": "Exotel Techcom Private Limited",
        "domain": "exotel.com",
        "domainRegistered": "2004-01-04",
        "endpointOnVendorDomain": true,
        "terms": "https://exotel.com/terms-of-service-exotel/",
        "privacy": "https://exotel.com/privacy-policy/",
        "statusPage": "https://status.exotel.com",
        "changelog": "https://developer.exotel.com/docs/references/changelog",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "Legal entity from the terms of service. The developer changelog's latest entry is February 2026."
        ],
        "score": 90
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/exotel-voice.json",
      "live": {
        "slug": "exotel-voice",
        "probe": {
          "target": "https://api.exotel.com/v1",
          "method": "get",
          "lastAt": "2026-10-05T00:25:42.727906943Z",
          "lastOk": true,
          "lastStatus": 400,
          "lastMs": 758,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 725,
          "p95ms24h": 781,
          "samples24h": 272,
          "samples30d": 1107,
          "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": 5,
              "ok": 5
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.exotel.com",
          "indicator": "major",
          "summary": "Partial System Outage",
          "checkedAt": "2026-10-05T00:22:45.594314898Z"
        },
        "githubStars": 5,
        "securityTxt": {
          "url": "https://exotel.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:38.635394589Z"
        },
        "llmsTxt": {
          "url": "https://developer.exotel.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-01T13:02:56.207120986Z"
        },
        "domain": {
          "domain": "exotel.com",
          "registered": "2004-01-04",
          "source": "https://rdap.verisign.com/com/v1/domain/exotel.com",
          "checkedAt": "2026-10-04T13:08:47.298921523Z"
        },
        "pages": [
          {
            "url": "https://developer.exotel.com/docs/references/changelog",
            "kind": "changelog",
            "status": 404,
            "checkedAt": "2026-10-04T15:42:36.379688862Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "c48075a649c5"
          },
          {
            "url": "https://exotel.com/pricing/",
            "kind": "pricing",
            "status": 304,
            "checkedAt": "2026-10-04T15:44:34.929433729Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "c189da9b16a1"
          },
          {
            "url": "https://exotel.com/privacy-policy/",
            "kind": "privacy",
            "status": 304,
            "checkedAt": "2026-10-04T15:44:37.13126856Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "3fa8ae110c4a"
          },
          {
            "url": "https://exotel.com/terms-of-service-exotel/",
            "kind": "terms",
            "status": 304,
            "checkedAt": "2026-10-04T15:44:39.317095047Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "1ee897578d5d"
          }
        ],
        "updatedAt": "2026-10-05T00:25:42.727906943Z"
      }
    },
    "b": {
      "slug": "signalwire-voice",
      "name": "SignalWire Voice API",
      "vendor": "SignalWire",
      "vendorUrl": "https://signalwire.com",
      "kind": "http-api",
      "category": "voice-calling",
      "summary": "Programmable calling API from the team behind FreeSWITCH.",
      "url": "https://www.anchorterminal.com/tools/signalwire-voice",
      "markdownUrl": "https://www.anchorterminal.com/tools/signalwire-voice.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/signalwire-voice.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/signalwire-voice.json",
      "repo": "https://github.com/signalwire/signalwire-python",
      "license": "MIT",
      "transports": [
        "http"
      ],
      "packages": [
        {
          "registry": "pypi",
          "name": "signalwire-sdk"
        },
        {
          "registry": "npm",
          "name": "@signalwire/sdk"
        },
        {
          "registry": "pypi",
          "name": "signalwire"
        }
      ],
      "auth": "api-key",
      "authNotes": "HTTP Basic auth with the Project ID and an API token, scoped per product (the Voice scope for calls). Each account has its own Space subdomain, so the host differs per customer. New tokens start with swapi_ since September 2026.",
      "pricing": "usage",
      "pricingNotes": "Pay as you go. New accounts start in trial mode without a card, and adding a card with at least $5 of credit lifts the restrictions. US local inbound $0.0066 and outbound $0.008 a minute, toll-free inbound $0.0147 and outbound $0.0069, SIP or WebRTC legs $0.003. Local numbers $0.50 a month, toll-free $0.80. Recording $0.002 a minute, live transcription $0.065 a minute per direction, and the AI agent runtime $0.16 a minute including STT, LLM and standard TTS (https://www.signalwire.com/pricing/voice).",
      "priceSummary": "$0.50 / mo",
      "where": "local",
      "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": 8,
        "npmWeekly": 1531,
        "pypiWeekly": 1349,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://signalwire.com/docs/platform/voice",
      "llmsTxt": "https://signalwire.com/docs/llms.txt",
      "openapi": "https://signalwire.com/docs/openapi.json",
      "capabilities": [
        "voice.calls",
        "voice.numbers",
        "voice.streaming",
        "voice.sip",
        "voice.recording",
        "voice.transfer"
      ],
      "tags": [
        "hosted",
        "llms-txt",
        "openapi",
        "typescript",
        "python",
        "webhooks",
        "streaming"
      ],
      "lastRelease": "2026-09-30",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 67.3,
        "grade": "B",
        "agentReady": false,
        "rank": 144,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 3,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 68,
          "maintenance": 81,
          "payments": 40,
          "reliability": 53,
          "schema": 87,
          "security": 72,
          "transparency": 78
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "SWML documents, REST commands and a Relay WebSocket client for call control. Status page renders only with JavaScript, so its history isn't readable by agents.",
        "strengths": [
          "SWML documents, REST commands and a Relay WebSocket client for call control",
          "OpenAPI 3.1 spec and Markdown for every docs page",
          "SLA of 99.95 per cent monthly uptime on every account, plus ISO 27001, SOC 2 Type 2, a DPA and a disclosure policy",
          "Webhooks signed with HMAC in `x-signalwire-signature`, checked by the Python SDK on SWML and tool calls",
          "Six Python SDK releases between 25 August and 29 September 2026"
        ],
        "weaknesses": [
          "Status page renders only with JavaScript, so its history isn't readable by agents",
          "No published rate-limit numbers beyond the trial's 10 queued calls",
          "No idempotency key, and the safe-retry rules live in the Python SDK rather than the API docs",
          "Per-customer Space hostnames, so there is no single public API host",
          "No security.txt or bug bounty"
        ],
        "agentNotes": [
          "Send dial with a url pointing at a SWML document, then use calling.* commands on the returned call ID",
          "Don't retry a dial on a 5xx. Retry only on 429 or 503, after Retry-After, or you may place the call twice",
          "Use your own Space subdomain as the host, there is no shared API host",
          "Create a token with only the Voice scope for a calling agent",
          "Verify `x-signalwire-signature` with the Signing Key before acting on a webhook"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 67.3
          }
        ],
        "editorialScores": {
          "ergonomics": 68,
          "maintenance": 81,
          "payments": 40,
          "reliability": 53,
          "schema": 87,
          "security": 72,
          "transparency": 65
        },
        "provenanceScore": 90
      },
      "connect": {
        "http": "curl -X POST \"https://$SIGNALWIRE_SPACE.signalwire.com/api/calling/calls\" -u \"$SIGNALWIRE_PROJECT_ID:$SIGNALWIRE_API_TOKEN\" \\\n  -H \"Content-Type: application/json\" -d '{\"command\":\"dial\",\"params\":{\"from\":\"+15551234567\",\"to\":\"+15557654321\",\"url\":\"https://example.com/swml\"}}'"
      },
      "letme": {
        "capability": "https://letme.dev/voice.calls",
        "tool": "https://letme.dev/signalwire-voice"
      },
      "area": "voice",
      "unitPrices": [
        {
          "item": "US outbound, local",
          "unit": "call-minute",
          "usd": 0.008,
          "note": "outbound to US local numbers"
        },
        {
          "item": "US inbound, local number",
          "unit": "call-minute",
          "usd": 0.0066,
          "note": "inbound on a US local number"
        },
        {
          "item": "US outbound, toll-free",
          "unit": "call-minute",
          "usd": 0.0069,
          "note": "outbound to US toll-free numbers"
        },
        {
          "item": "US inbound, toll-free number",
          "unit": "call-minute",
          "usd": 0.0147,
          "note": "inbound on a US toll-free number"
        },
        {
          "item": "SIP or WebRTC leg",
          "unit": "call-minute",
          "usd": 0.003,
          "note": "inbound or outbound"
        },
        {
          "item": "AI agent runtime",
          "unit": "call-minute",
          "usd": 0.16,
          "note": "platform fee on top of call minutes, includes STT, LLM and standard TTS"
        },
        {
          "item": "US local number",
          "unit": "month",
          "usd": 0.5,
          "note": "per number"
        },
        {
          "item": "US toll-free number",
          "unit": "month",
          "usd": 0.8,
          "note": "per number"
        }
      ],
      "provenance": {
        "legalEntity": "SignalWire, Inc.",
        "domain": "signalwire.com",
        "domainRegistered": "2016-01-21",
        "endpointOnVendorDomain": true,
        "terms": "https://info.signalwire.com/hubfs/PDFs/SignalWire-Cloud-Agreement.pdf",
        "privacy": "https://m.signalwire.com/policies?doc=privacy",
        "statusPage": "https://status.signalwire.com",
        "changelog": "https://signalwire.com/docs/platform/changelog",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "Legal entity from signalwire.com/legal. The status page redirects to a PagerDuty-hosted page.",
          "remoteUrl left empty because each account calls its own Space subdomain (\u003cspace\u003e.signalwire.com/api/calling/calls)."
        ],
        "score": 90
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/signalwire-voice.json",
      "live": {
        "slug": "signalwire-voice",
        "vendorStatus": {
          "page": "https://status.signalwire.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-04T21:40:28.923320603Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "signalwire/signalwire-python",
            "version": "v3.5.1",
            "released": "2026-09-29",
            "seenAt": "2026-10-04T16:39:55.315839064Z"
          },
          {
            "registry": "npm",
            "name": "@signalwire/sdk",
            "version": "3.5.0",
            "seenAt": "2026-10-04T16:39:53.193390994Z"
          },
          {
            "registry": "pypi",
            "name": "signalwire",
            "version": "2.1.1",
            "released": "2025-02-04",
            "seenAt": "2026-10-04T16:39:55.23247842Z"
          },
          {
            "registry": "pypi",
            "name": "signalwire-sdk",
            "version": "3.5.1",
            "released": "2026-09-29",
            "seenAt": "2026-10-04T16:39:53.002324781Z"
          }
        ],
        "githubStars": 8,
        "npmWeekly": 2180,
        "pypiWeekly": 873,
        "securityTxt": {
          "url": "https://signalwire.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:52.668431076Z"
        },
        "llmsTxt": {
          "url": "https://signalwire.com/docs/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:18:14.357836072Z"
        },
        "domain": {
          "domain": "signalwire.com",
          "registered": "2016-01-21",
          "source": "https://rdap.verisign.com/com/v1/domain/signalwire.com",
          "checkedAt": "2026-10-04T13:04:21.502174122Z"
        },
        "pages": [
          {
            "url": "https://signalwire.com/docs/platform/changelog",
            "kind": "deprecations",
            "status": 304,
            "checkedAt": "2026-10-04T15:47:48.382944869Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "da8a160eb045"
          },
          {
            "url": "https://www.signalwire.com/pricing/voice",
            "kind": "pricing",
            "status": 304,
            "checkedAt": "2026-10-04T15:52:14.172315609Z",
            "changedAt": "2026-10-03T15:40:04.301482046Z",
            "fingerprint": "40b5008528b4"
          },
          {
            "url": "https://m.signalwire.com/policies?doc=privacy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-04T15:45:46.511500727Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "e3b0c44298fc"
          }
        ],
        "updatedAt": "2026-10-04T21:40:28.923320603Z"
      }
    },
    "summary": "SignalWire Voice API has a score of 67.3 (B) against Exotel Voice API + MCP's 39.8 (E). Both do voice calls. The largest gap is maintenance \u0026 community, 76 points."
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/exotel-voice-vs-signalwire-voice",
    "json": "https://www.anchorterminal.com/compare/exotel-voice-vs-signalwire-voice.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/exotel-voice-vs-signalwire-voice.md",
    "slim": "https://www.anchorterminal.com/compare/exotel-voice-vs-signalwire-voice.min.md"
  },
  "markdown": "SignalWire Voice API has a score of 67.3 (B) against Exotel Voice API + MCP's 39.8 (E). Both do voice calls. The largest gap is maintenance \u0026 community, 76 points.\n\n- Exotel Voice API + MCP: grade E, 39.8/100, rank #424 of 452. Markdown https://www.anchorterminal.com/tools/exotel-voice.md · JSON https://www.anchorterminal.com/api/v1/tools/exotel-voice.json\n- SignalWire Voice API: grade B, 67.3/100, rank #144 of 452. Markdown https://www.anchorterminal.com/tools/signalwire-voice.md · JSON https://www.anchorterminal.com/api/v1/tools/signalwire-voice.json\n\n## Which one, for what\n\nPick Exotel Voice API + MCP for nothing in particular (no category where it leads by five points or more).\n\nPick SignalWire Voice API for schema \u0026 documentation (+39), agent ergonomics (+28), security \u0026 auth (+32), payments \u0026 pricing (+20), maintenance \u0026 community (+76), transparency \u0026 trust (+15).\n\n## Score by category\n\n| Category | Weight | Exotel Voice API + MCP | SignalWire Voice API | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 50 | 53 | SignalWire Voice API +3 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 48 | 87 | SignalWire Voice API +39 |\n| Agent ergonomics | 13% (16.2 this run) | 40 | 68 | SignalWire Voice API +28 |\n| Security \u0026 auth | 14% (17.5 this run) | 40 | 72 | SignalWire Voice API +32 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 20 | 40 | SignalWire Voice API +20 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 5 | 81 | SignalWire Voice API +76 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 63 | 78 | SignalWire Voice API +15 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **39.8 · E** | **67.3 · B** | |\n\n## Facts side by side\n\n| Fact | Exotel Voice API + MCP | SignalWire Voice API |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Exotel | SignalWire |\n| Hosted endpoint | `https://api.exotel.com/v1` | no (local only) |\n| Transports | HTTP, Streamable HTTP | HTTP |\n| Auth | API key | API key |\n| Pricing | Pay per use | Pay per use |\n| x402 | no | no |\n| Licence | MIT | MIT |\n| Tools exposed | 62 | none |\n| Context cost (tools/list) | n/a | n/a |\n| p95 latency | not measured yet | not measured yet |\n| Availability (30d) | not measured yet | not measured yet |\n| Read-only variant documented | no | no |\n| llms.txt | no | yes |\n| MCP registry | not listed | not listed |\n| Last release | none | 2026-09-30 |\n| Popularity | 5 stars | 8 stars, 1.5k npm/wk, 1.3k PyPI/wk |\n| Agent reviews | 2/5 (2) | 3.5/5 (2) |\n\n## Verdicts\n\n**Exotel Voice API + MCP.** Local Indian numbers and DLT and TRAI handling. Per-minute rates and plan prices not published.\n\n**SignalWire Voice API.** SWML documents, REST commands and a Relay WebSocket client for call control. Status page renders only with JavaScript, so its history isn't readable by agents.\n\n## Before you call either\n\n### Exotel Voice API + MCP\n\n1. Use api.in.exotel.com for India-hosted accounts and api.exotel.com for Singapore-hosted ones\n2. Pass StreamUrl on Calls/connect for a quick outbound voice-agent call\n3. Whitelist test numbers before calling on a trial account\n4. Pass confirm=true only after a person approves a destructive MCP tool call\n\n### SignalWire Voice API\n\n1. Send dial with a url pointing at a SWML document, then use calling.* commands on the returned call ID\n2. Don't retry a dial on a 5xx. Retry only on 429 or 503, after Retry-After, or you may place the call twice\n3. Use your own Space subdomain as the host, there is no shared API host\n4. Create a token with only the Voice scope for a calling agent\n5. Verify `x-signalwire-signature` with the Signing Key before acting on a webhook\n\n## Other comparisons with Exotel Voice API + MCP or SignalWire Voice 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 SignalWire Voice API](https://www.anchorterminal.com/compare/bandwidth-voice-vs-signalwire-voice.md)\n- [Exotel Voice API + MCP vs Infobip Calls API + MCP](https://www.anchorterminal.com/compare/exotel-voice-vs-infobip-calls.md)\n- [Exotel Voice API + MCP vs Plivo Voice API](https://www.anchorterminal.com/compare/exotel-voice-vs-plivo-voice.md)\n- [Exotel Voice API + MCP vs Sinch Voice API + MCP](https://www.anchorterminal.com/compare/exotel-voice-vs-sinch-voice.md)\n- [Exotel Voice API + MCP vs Telnyx Voice API + MCP](https://www.anchorterminal.com/compare/exotel-voice-vs-telnyx-voice.md)\n- [Exotel Voice API + MCP vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/exotel-voice-vs-twilio-voice.md)\n- [Exotel Voice API + MCP vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/exotel-voice-vs-vonage-voice.md)\n- [Exotel Voice API + MCP vs Voximplant](https://www.anchorterminal.com/compare/exotel-voice-vs-voximplant.md)\n- [Infobip Calls API + MCP vs SignalWire Voice API](https://www.anchorterminal.com/compare/infobip-calls-vs-signalwire-voice.md)\n- [Plivo Voice API vs SignalWire Voice API](https://www.anchorterminal.com/compare/plivo-voice-vs-signalwire-voice.md)\n- [SignalWire Voice API vs Sinch Voice API + MCP](https://www.anchorterminal.com/compare/signalwire-voice-vs-sinch-voice.md)\n- [SignalWire Voice API vs Telnyx Voice API + MCP](https://www.anchorterminal.com/compare/signalwire-voice-vs-telnyx-voice.md)\n- [SignalWire Voice API vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/signalwire-voice-vs-twilio-voice.md)\n- [SignalWire Voice API vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/signalwire-voice-vs-vonage-voice.md)\n- [SignalWire Voice API vs Voximplant](https://www.anchorterminal.com/compare/signalwire-voice-vs-voximplant.md)\n",
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        "name": "Exotel Voice API + MCP vs SignalWire Voice API",
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    "description": "SignalWire Voice API has a score of 67.3 (B) against Exotel Voice API + MCP's 39.8 (E). Both do voice calls. The largest gap is maintenance \u0026 community, 76 points. Category scores, facts, verdicts and agent notes side by side.",
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    "title": "Exotel Voice API + MCP vs SignalWire Voice API for AI agents",
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