{
  "data": {
    "a": {
      "slug": "elevenlabs-tts",
      "name": "ElevenLabs Text to Speech API + MCP",
      "vendor": "ElevenLabs",
      "vendorUrl": "https://elevenlabs.io",
      "kind": "model",
      "category": "text-to-speech",
      "summary": "ElevenLabs text-to-speech over REST, HTTP streaming and WebSocket.",
      "url": "https://www.anchorterminal.com/tools/elevenlabs-tts",
      "markdownUrl": "https://www.anchorterminal.com/tools/elevenlabs-tts.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/elevenlabs-tts.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/elevenlabs-tts.json",
      "repo": "https://github.com/elevenlabs/elevenlabs-python",
      "license": "MIT (SDKs)",
      "transports": [
        "http",
        "streamable-http",
        "stdio"
      ],
      "remoteUrl": "https://api.elevenlabs.io/v1",
      "packages": [
        {
          "registry": "npm",
          "name": "@elevenlabs/elevenlabs-js"
        },
        {
          "registry": "pypi",
          "name": "elevenlabs"
        },
        {
          "registry": "pypi",
          "name": "elevenlabs-mcp"
        }
      ],
      "auth": "mixed",
      "authNotes": "`xi-api-key` header for the REST and WebSocket APIs. The hosted MCP at `https://api.elevenlabs.io/v1/mcp` signs in with OAuth, scoped to Agents and Text to Speech. The older local `elevenlabs-mcp` server reads `ELEVENLABS_API_KEY` and is now deprecated. Data residency hosts exist for the EU, India and Singapore.",
      "pricing": "freemium",
      "pricingNotes": "API usage is priced per 1,000 characters. Eleven v4, v3 and Multilingual v2 cost $0.08, v4 Turbo, v3 Conversational and Flash/Turbo $0.04. Eleven v4 is at $0.022 and v4 Turbo at $0.011 until 2026-10-12. Plans are Free (10,000 v4 characters), Starter $6, Creator $22 ($11 first month), Pro $99, Scale $299 and Business $990 a month, with pay-as-you-go as an alternative. Commercial use starts at Starter (https://elevenlabs.io/pricing/api).",
      "priceSummary": "$6 / mo",
      "where": "both",
      "x402": {
        "level": "no",
        "evidence": "No x402 or machine payment in the docs or pricing. Subscription or pay-as-you-go card billing (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 3122,
        "npmWeekly": 1063065,
        "pypiWeekly": 2223099,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://elevenlabs.io/docs/overview/capabilities/text-to-speech",
      "llmsTxt": "https://elevenlabs.io/docs/llms.txt",
      "openapi": "https://api.elevenlabs.io/openapi.json",
      "registryName": "io.elevenlabs/mcp",
      "capabilities": [
        "speech.tts",
        "speech.streaming",
        "speech.voices",
        "speech.ssml",
        "speech.languages"
      ],
      "tags": [
        "hosted",
        "freemium",
        "free-tier",
        "closed-source",
        "python",
        "typescript",
        "openapi",
        "llms-txt",
        "mcp",
        "streaming",
        "enterprise"
      ],
      "lastRelease": "2026-09-28",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 73.1,
        "grade": "BB",
        "agentReady": true,
        "rank": 61,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 3,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 82,
          "maintenance": 77,
          "payments": 40,
          "reliability": 80,
          "schema": 94,
          "security": 60,
          "transparency": 71
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "high",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Keys can be limited to chosen endpoints and given a credit quota, and service accounts hold keys that don't belong to a person. Content may be used for training unless you opt out under Data use, and the opt-out only applies going forward.",
        "strengths": [
          "Keys can be limited to chosen endpoints and given a credit quota, and service accounts hold keys that don't belong to a person",
          "Error reference with about 90 codes, each carrying `type`, `code`, `message` and `request_id`",
          "OpenAPI file, llms.txt and Markdown twins of every docs page",
          "Free plan with 10,000 v4 characters a month and no card",
          "Weekly dated changelog, 16 entries between 6 July and 28 September 2026"
        ],
        "weaknesses": [
          "Content may be used for training unless you opt out under Data use, and the opt-out only applies going forward",
          "Zero retention (`enable_logging=false`) is Enterprise only, and TTS text and audio are kept by default",
          "No SLA published for self-serve plans",
          "Eleven v4 and v3 ignore SSML `\u003cbreak\u003e` tags",
          "v4 rises from $0.022 to $0.08 per 1,000 characters after 2026-10-12"
        ],
        "agentNotes": [
          "Call Eleven v4 through Text to Dialogue, not `/v1/text-to-speech`.",
          "Spell out numbers yourself on `eleven_flash_v2_5`, which doesn't normalise them by default, and turning that on is Enterprise only.",
          "On 429 read `code`, back off on `rate_limit_exceeded` and wait for running requests on `concurrent_limit_exceeded`.",
          "Keep each request under 10,000 characters on v4 and Multilingual v2, 5,000 on v3.",
          "Give the agent a key scoped to Text to Speech with a credit quota."
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "high",
            "grade": "BB",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 73.1
          }
        ],
        "editorialScores": {
          "ergonomics": 82,
          "maintenance": 77,
          "payments": 40,
          "reliability": 80,
          "schema": 94,
          "security": 60,
          "transparency": 50
        },
        "provenanceScore": 92
      },
      "connect": {
        "http": "curl -X POST \"https://api.elevenlabs.io/v1/text-to-speech/JBFqnCBsd6RMkjVDRZzb?output_format=mp3_44100_128\" \\\n  -H \"xi-api-key: $ELEVENLABS_API_KEY\" -H \"content-type: application/json\" -o speech.mp3 \\\n  -d '{\"text\":\"Your table is booked for seven.\",\"model_id\":\"eleven_flash_v2_5\"}'",
        "claudeCode": "claude mcp add --transport http elevenlabs https://api.elevenlabs.io/v1/mcp",
        "config": {
          "mcpServers": {
            "elevenlabs": {
              "args": [
                "elevenlabs-mcp"
              ],
              "command": "uvx",
              "env": {
                "ELEVENLABS_API_KEY": "${ELEVENLABS_API_KEY}"
              }
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/speech.tts",
        "tool": "https://letme.dev/elevenlabs-tts"
      },
      "sameCompany": [
        "elevenlabs-music",
        "elevenlabs-scribe",
        "elevenlabs-agents",
        "elevenlabs-voice-cloning"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "Eleven v4",
          "unit": "1m-chars",
          "usd": 80,
          "note": "$22 until 2026-10-12"
        },
        {
          "item": "Eleven v4 Turbo",
          "unit": "1m-chars",
          "usd": 40,
          "note": "$11 until 2026-10-12"
        },
        {
          "item": "Eleven v3 / Multilingual v2",
          "unit": "1m-chars",
          "usd": 80
        },
        {
          "item": "Flash v2.5 / v3 Conversational",
          "unit": "1m-chars",
          "usd": 40
        },
        {
          "item": "Starter plan",
          "unit": "month",
          "usd": 6,
          "note": "about 273,000 v4 characters"
        },
        {
          "item": "Creator plan",
          "unit": "month",
          "usd": 22,
          "note": "about 1M v4 characters"
        }
      ],
      "provenance": {
        "legalEntity": "Eleven Labs Inc.",
        "domain": "elevenlabs.io",
        "domainRegistered": "2021-12-15",
        "endpointOnVendorDomain": true,
        "terms": "https://elevenlabs.io/terms-of-use",
        "privacy": "https://elevenlabs.io/privacy-policy",
        "statusPage": "https://status.elevenlabs.io",
        "changelog": "https://elevenlabs.io/docs/changelog",
        "securityTxt": "valid",
        "checked": "2026-09-30",
        "score": 92
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/elevenlabs-tts.json",
      "live": {
        "slug": "elevenlabs-tts",
        "probe": {
          "target": "https://api.elevenlabs.io/v1",
          "method": "get",
          "lastAt": "2026-10-04T23:48:07.877248746Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 117,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 118,
          "p95ms24h": 157,
          "samples24h": 272,
          "samples30d": 1100,
          "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": 270,
              "ok": 270
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.elevenlabs.io",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-04T23:49:12.24079214Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "elevenlabs/elevenlabs-python",
            "version": "v2.70.0",
            "released": "2026-09-28",
            "seenAt": "2026-10-04T16:26:21.788463226Z"
          },
          {
            "registry": "mcp-registry",
            "name": "io.elevenlabs/mcp",
            "version": "1.0.0",
            "seenAt": "2026-10-04T23:42:40.113054682Z"
          },
          {
            "registry": "npm",
            "name": "@elevenlabs/elevenlabs-js",
            "version": "2.70.0",
            "seenAt": "2026-10-04T16:26:19.471925531Z"
          },
          {
            "registry": "pypi",
            "name": "elevenlabs",
            "version": "2.70.0",
            "released": "2026-09-28",
            "seenAt": "2026-10-04T16:26:19.782214789Z"
          },
          {
            "registry": "pypi",
            "name": "elevenlabs-mcp",
            "version": "0.12.2",
            "released": "2026-08-04",
            "seenAt": "2026-10-04T16:26:19.89529303Z"
          }
        ],
        "githubStars": 3129,
        "npmWeekly": 1135260,
        "pypiWeekly": 2247596,
        "securityTxt": {
          "url": "https://elevenlabs.io/.well-known/security.txt",
          "state": "valid",
          "expires": "2027-03-01T00:00:00.000Z",
          "checkedAt": "2026-10-04T15:15:51.968224287Z"
        },
        "llmsTxt": {
          "url": "https://elevenlabs.io/docs/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:17:54.328986649Z"
        },
        "domain": {
          "domain": "elevenlabs.io",
          "checkedAt": "2026-10-04T13:07:28.958673807Z"
        },
        "updatedAt": "2026-10-04T23:49:12.24079214Z"
      }
    },
    "b": {
      "slug": "soniox-tts",
      "name": "Soniox Text-to-Speech",
      "vendor": "Soniox",
      "vendorUrl": "https://soniox.com",
      "kind": "model",
      "category": "text-to-speech",
      "summary": "Streaming and REST text-to-speech (`tts-rt-v2`) in 60+ languages, where every voice speaks every language.",
      "url": "https://www.anchorterminal.com/tools/soniox-tts",
      "markdownUrl": "https://www.anchorterminal.com/tools/soniox-tts.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/soniox-tts.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/soniox-tts.json",
      "repo": "https://github.com/soniox/soniox-python",
      "license": "Apache-2.0 (Python SDK)",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://tts-rt.soniox.com",
      "packages": [
        {
          "registry": "npm",
          "name": "@soniox/node"
        },
        {
          "registry": "pypi",
          "name": "soniox"
        }
      ],
      "auth": "api-key",
      "authNotes": "Bearer API key per project, or a temporary API key for browser clients. REST at `POST https://tts-rt.soniox.com/tts`, WebSocket at `wss://tts-rt.soniox.com/tts-websocket`. Regional hosts for the EU, Japan and India.",
      "pricing": "usage",
      "pricingNotes": "Token-based pay-as-you-go. Input text $4.00 per 1M tokens and output audio $21.50 per 1M tokens, which Soniox puts at about $0.70 an hour of generated speech (1 character is about 0.3 input tokens, 1 hour of audio about 30,000 output tokens). No free credits for new sign-ups (https://soniox.com/pricing).",
      "priceSummary": "Pay per use",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402 or machine payment in the docs or pricing. Billed to a funded account (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 12,
        "npmWeekly": 22200,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://soniox.com/docs/tts/get-started",
      "llmsTxt": "https://soniox.com/docs/llms.txt",
      "capabilities": [
        "speech.tts",
        "speech.streaming",
        "speech.voices",
        "speech.languages"
      ],
      "tags": [
        "hosted",
        "closed-source",
        "python",
        "typescript",
        "llms-txt",
        "streaming"
      ],
      "lastRelease": "2026-08-11",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 63.9,
        "grade": "B",
        "agentReady": false,
        "rank": 193,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 7,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 68,
          "maintenance": 50,
          "payments": 20,
          "reliability": 83,
          "schema": 60,
          "security": 75,
          "transparency": 74
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "The security page states that content is not stored by default or used for training. Audio output is capped at two minutes per request or stream.",
        "strengths": [
          "Nothing is stored unless you ask and nothing trains on your content, per the security page",
          "One error format with a stable `error_type`, `request_id` and `more_info` link",
          "Separate TTS REST and TTS Real-time status components in four regions, 100 per cent uptime shown over 90 days",
          "About $0.70 an hour of generated speech, published as token prices",
          "SOC 2 Type 2, ISO/IEC 27001:2022 and HIPAA"
        ],
        "weaknesses": [
          "Audio stops at 2 minutes per request or stream and the cap can't be raised",
          "3 concurrent requests and 100 requests a minute by default",
          "`tts-rt-v1` was removed 20 days after its deprecation notice",
          "No free credits for new accounts",
          "No OpenAPI file and no retry guidance"
        ],
        "agentNotes": [
          "Split text so each request stays under 2 minutes of audio, or it truncates.",
          "Branch on `error_type`, not the message, and back off on `limit_exceeded`.",
          "Use a temporary API key for browser clients.",
          "Use bracketed audio tags such as `[whispering]` instead of SSML.",
          "Pick the regional host (EU, Japan, India) that matches your data residency."
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 63.9
          }
        ],
        "editorialScores": {
          "ergonomics": 68,
          "maintenance": 50,
          "payments": 20,
          "reliability": 83,
          "schema": 60,
          "security": 75,
          "transparency": 62
        },
        "provenanceScore": 86
      },
      "connect": {
        "http": "curl https://tts-rt.soniox.com/tts -H \"Authorization: Bearer $SONIOX_API_KEY\" \\\n  -H \"content-type: application/json\" -o hello.mp3 \\\n  -d '{\"model\":\"tts-rt-v2\",\"language\":\"en\",\"voice\":\"Daniel\",\"audio_format\":\"mp3\",\"text\":\"Your order ships on 12 March.\"}'"
      },
      "letme": {
        "capability": "https://letme.dev/speech.tts",
        "tool": "https://letme.dev/soniox-tts"
      },
      "sameCompany": [
        "soniox-stt",
        "soniox-voice-cloning"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "tts-rt-v2",
          "unit": "audio-minute",
          "usd": 0.0117,
          "note": "per minute of generated speech, Soniox's estimate of $0.70 an hour, token-billed"
        }
      ],
      "provenance": {
        "legalEntity": "Soniox Inc.",
        "domain": "soniox.com",
        "domainRegistered": "2020-03-23",
        "endpointOnVendorDomain": true,
        "terms": "https://soniox.com/policies/terms-of-service",
        "privacy": "https://soniox.com/policies/privacy-policy",
        "statusPage": "https://status.soniox.com",
        "changelog": "https://soniox.com/docs/tts/models",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "Terms and privacy policy last updated 2026-06-29. The company address is Foster City, California"
        ],
        "score": 86
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/soniox-tts.json",
      "live": {
        "slug": "soniox-tts",
        "probe": {
          "target": "https://tts-rt.soniox.com",
          "method": "get",
          "lastAt": "2026-10-04T23:48:16.154092205Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 341,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 313,
          "p95ms24h": 392,
          "samples24h": 272,
          "samples30d": 1100,
          "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": 270,
              "ok": 270
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.soniox.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-04T17:31:32.080499897Z"
        },
        "versions": [
          {
            "registry": "npm",
            "name": "@soniox/node",
            "version": "2.3.0",
            "seenAt": "2026-10-04T16:40:15.547086792Z"
          },
          {
            "registry": "pypi",
            "name": "soniox",
            "version": "2.10.0",
            "released": "2026-10-02",
            "seenAt": "2026-10-04T16:40:15.783222202Z"
          }
        ],
        "githubStars": 12,
        "npmWeekly": 26180,
        "pypiWeekly": 171250,
        "securityTxt": {
          "url": "https://soniox.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:59.988207849Z"
        },
        "llmsTxt": {
          "url": "https://soniox.com/docs/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:18:16.442369832Z"
        },
        "domain": {
          "domain": "soniox.com",
          "registered": "2020-03-23",
          "source": "https://rdap.verisign.com/com/v1/domain/soniox.com",
          "checkedAt": "2026-10-04T13:05:00.531232044Z"
        },
        "pages": [
          {
            "url": "https://soniox.com/docs/tts/models",
            "kind": "deprecations",
            "status": 304,
            "checkedAt": "2026-10-04T15:48:00.470722045Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "a63d4a072013"
          }
        ],
        "updatedAt": "2026-10-04T23:48:16.154092205Z"
      }
    },
    "summary": "ElevenLabs Text to Speech API + MCP has a score of 73.1 (BB) against Soniox Text-to-Speech's 63.9 (B). Both do speech tts. The largest gap is schema \u0026 documentation, 34 points."
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/elevenlabs-tts-vs-soniox-tts",
    "json": "https://www.anchorterminal.com/compare/elevenlabs-tts-vs-soniox-tts.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/elevenlabs-tts-vs-soniox-tts.md",
    "slim": "https://www.anchorterminal.com/compare/elevenlabs-tts-vs-soniox-tts.min.md"
  },
  "markdown": "ElevenLabs Text to Speech API + MCP has a score of 73.1 (BB) against Soniox Text-to-Speech's 63.9 (B). Both do speech tts. The largest gap is schema \u0026 documentation, 34 points.\n\n- ElevenLabs Text to Speech API + MCP: grade BB, 73.1/100, rank #61 of 452. Markdown https://www.anchorterminal.com/tools/elevenlabs-tts.md · JSON https://www.anchorterminal.com/api/v1/tools/elevenlabs-tts.json\n- Soniox Text-to-Speech: grade B, 63.9/100, rank #193 of 452. Markdown https://www.anchorterminal.com/tools/soniox-tts.md · JSON https://www.anchorterminal.com/api/v1/tools/soniox-tts.json\n\n## Which one, for what\n\nPick ElevenLabs Text to Speech API + MCP for schema \u0026 documentation (+34), agent ergonomics (+14), payments \u0026 pricing (+20), maintenance \u0026 community (+27).\n\nPick Soniox Text-to-Speech for security \u0026 auth (+15).\n\n## Score by category\n\n| Category | Weight | ElevenLabs Text to Speech API + MCP | Soniox Text-to-Speech | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 80 | 83 | Soniox Text-to-Speech +3 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 94 | 60 | ElevenLabs Text to Speech API + MCP +34 |\n| Agent ergonomics | 13% (16.2 this run) | 82 | 68 | ElevenLabs Text to Speech API + MCP +14 |\n| Security \u0026 auth | 14% (17.5 this run) | 60 | 75 | Soniox Text-to-Speech +15 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 20 | ElevenLabs Text to Speech API + MCP +20 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 77 | 50 | ElevenLabs Text to Speech API + MCP +27 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 71 | 74 | Soniox Text-to-Speech +3 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **73.1 · BB** | **63.9 · B** | |\n\n## Facts side by side\n\n| Fact | ElevenLabs Text to Speech API + MCP | Soniox Text-to-Speech |\n| --- | --- | --- |\n| Kind | Model API | Model API |\n| Vendor | ElevenLabs | Soniox |\n| Hosted endpoint | `https://api.elevenlabs.io/v1` | `https://tts-rt.soniox.com` |\n| Transports | HTTP, Streamable HTTP, stdio | HTTP |\n| Auth | OAuth or key | API key |\n| Pricing | Freemium | Pay per use |\n| x402 | no | no |\n| Licence | MIT (SDKs) | Apache-2.0 (Python SDK) |\n| Tools exposed | none | 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 | yes | yes |\n| MCP registry | `io.elevenlabs/mcp` | not listed |\n| Last release | 2026-09-28 | 2026-08-11 |\n| Popularity | 3.1k stars, 1.1M npm/wk, 2.2M PyPI/wk | 12 stars, 22k npm/wk |\n| Agent reviews | 3.5/5 (2) | 3/5 (2) |\n\n## Verdicts\n\n**ElevenLabs Text to Speech API + MCP.** Keys can be limited to chosen endpoints and given a credit quota, and service accounts hold keys that don't belong to a person. Content may be used for training unless you opt out under Data use, and the opt-out only applies going forward.\n\n**Soniox Text-to-Speech.** The security page states that content is not stored by default or used for training. Audio output is capped at two minutes per request or stream.\n\n## Before you call either\n\n### ElevenLabs Text to Speech API + MCP\n\n1. Call Eleven v4 through Text to Dialogue, not `/v1/text-to-speech`.\n2. Spell out numbers yourself on `eleven_flash_v2_5`, which doesn't normalise them by default, and turning that on is Enterprise only.\n3. On 429 read `code`, back off on `rate_limit_exceeded` and wait for running requests on `concurrent_limit_exceeded`.\n4. Keep each request under 10,000 characters on v4 and Multilingual v2, 5,000 on v3.\n5. Give the agent a key scoped to Text to Speech with a credit quota.\n\n### Soniox Text-to-Speech\n\n1. Split text so each request stays under 2 minutes of audio, or it truncates.\n2. Branch on `error_type`, not the message, and back off on `limit_exceeded`.\n3. Use a temporary API key for browser clients.\n4. Use bracketed audio tags such as `[whispering]` instead of SSML.\n5. Pick the regional host (EU, Japan, India) that matches your data residency.\n\n## Other comparisons with ElevenLabs Text to Speech API + MCP or Soniox Text-to-Speech\n\n- [Amazon Polly vs ElevenLabs Text to Speech API + MCP](https://www.anchorterminal.com/compare/amazon-polly-vs-elevenlabs-tts.md)\n- [Amazon Polly vs Soniox Text-to-Speech](https://www.anchorterminal.com/compare/amazon-polly-vs-soniox-tts.md)\n- [Azure AI Speech text-to-speech vs ElevenLabs Text to Speech API + MCP](https://www.anchorterminal.com/compare/azure-text-to-speech-vs-elevenlabs-tts.md)\n- [Azure AI Speech text-to-speech vs Soniox Text-to-Speech](https://www.anchorterminal.com/compare/azure-text-to-speech-vs-soniox-tts.md)\n- [Cartesia Sonic TTS API + MCP vs ElevenLabs Text to Speech API + MCP](https://www.anchorterminal.com/compare/cartesia-tts-vs-elevenlabs-tts.md)\n- [Cartesia Sonic TTS API + MCP vs Soniox Text-to-Speech](https://www.anchorterminal.com/compare/cartesia-tts-vs-soniox-tts.md)\n- [Deepgram Text-to-Speech (Aura-2, Flux TTS) vs ElevenLabs Text to Speech API + MCP](https://www.anchorterminal.com/compare/deepgram-tts-vs-elevenlabs-tts.md)\n- [Deepgram Text-to-Speech (Aura-2, Flux TTS) vs Soniox Text-to-Speech](https://www.anchorterminal.com/compare/deepgram-tts-vs-soniox-tts.md)\n- [ElevenLabs Text to Speech API + MCP vs Murf TTS API + MCP](https://www.anchorterminal.com/compare/elevenlabs-tts-vs-murf-tts.md)\n- [ElevenLabs Text to Speech API + MCP vs PlayHT Text-to-Speech API](https://www.anchorterminal.com/compare/elevenlabs-tts-vs-playht-tts.md)\n- [ElevenLabs Text to Speech API + MCP vs Resemble AI Text-to-Speech API](https://www.anchorterminal.com/compare/elevenlabs-tts-vs-resemble-ai-tts.md)\n- [ElevenLabs Text to Speech API + MCP vs Rime TTS API + MCP](https://www.anchorterminal.com/compare/elevenlabs-tts-vs-rime-tts.md)\n- [Murf TTS API + MCP vs Soniox Text-to-Speech](https://www.anchorterminal.com/compare/murf-tts-vs-soniox-tts.md)\n- [PlayHT Text-to-Speech API vs Soniox Text-to-Speech](https://www.anchorterminal.com/compare/playht-tts-vs-soniox-tts.md)\n- [Resemble AI Text-to-Speech API vs Soniox Text-to-Speech](https://www.anchorterminal.com/compare/resemble-ai-tts-vs-soniox-tts.md)\n- [Rime TTS API + MCP vs Soniox Text-to-Speech](https://www.anchorterminal.com/compare/rime-tts-vs-soniox-tts.md)\n",
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        "name": "ElevenLabs Text to Speech API + MCP vs Soniox Text-to-Speech",
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    "description": "ElevenLabs Text to Speech API + MCP has a score of 73.1 (BB) against Soniox Text-to-Speech's 63.9 (B). Both do speech tts. The largest gap is schema \u0026 documentation, 34 points. Category scores, facts, verdicts and agent notes side by side.",
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    "title": "ElevenLabs Text to Speech API + MCP vs Soniox Text-to-Speech",
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