{
  "data": {
    "a": {
      "slug": "cartesia-voice-cloning",
      "name": "Cartesia Voice Cloning API + MCP",
      "vendor": "Cartesia",
      "vendorUrl": "https://cartesia.ai",
      "kind": "model",
      "category": "voice-cloning",
      "summary": "Instant voice clones for Sonic from 10 to 60 seconds of audio, and Pro Voice Clones fine-tuned on 30 minutes or more, trained in up to 3 hours.",
      "url": "https://www.anchorterminal.com/tools/cartesia-voice-cloning",
      "markdownUrl": "https://www.anchorterminal.com/tools/cartesia-voice-cloning.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/cartesia-voice-cloning.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/cartesia-voice-cloning.json",
      "repo": "https://github.com/cartesia-ai/cartesia-python",
      "license": "Apache-2.0 (SDKs)",
      "transports": [
        "http",
        "streamable-http",
        "stdio"
      ],
      "remoteUrl": "https://api.cartesia.ai",
      "packages": [
        {
          "registry": "npm",
          "name": "@cartesia/cartesia-js"
        },
        {
          "registry": "pypi",
          "name": "cartesia"
        },
        {
          "registry": "pypi",
          "name": "cartesia-mcp"
        }
      ],
      "auth": "mixed",
      "authNotes": "`Authorization: Bearer` API key plus the `Cartesia-Version` header. The hosted MCP at `https://mcp.cartesia.ai/mcp` signs in through the Playground, the local `cartesia-mcp` reads `CARTESIA_API_KEY`. Both expose `clone_voice` and `localize_voice`.",
      "pricing": "freemium",
      "pricingNotes": "Instant voice cloning is included from Pro at $5 a month. Pro Voice Cloning needs Startup at $49 a month (2 PVC slots) or Scale at $299 (4 slots), Enterprise is custom. Training a PVC is free, and speech from any clone costs 1 credit a character. Localising a voice costs 225 credits per added accent. Free has no cloning (https://cartesia.ai/pricing).",
      "priceSummary": "$5 / mo",
      "where": "both",
      "x402": {
        "level": "no",
        "evidence": "No x402 or machine payment in the docs or pricing (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": 19,
      "popularity": {
        "githubStars": 133,
        "npmWeekly": 166023,
        "pypiWeekly": 176771,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.cartesia.ai/build-with-cartesia/capability-guides/clone-voices",
      "llmsTxt": "https://docs.cartesia.ai/llms.txt",
      "capabilities": [
        "voice.clone",
        "speech.tts"
      ],
      "tags": [
        "hosted",
        "freemium",
        "closed-source",
        "python",
        "typescript",
        "llms-txt",
        "mcp",
        "async-jobs",
        "enterprise"
      ],
      "lastRelease": "2026-09-30",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 59.8,
        "grade": "C",
        "agentReady": false,
        "rank": 257,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 3,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 65,
          "maintenance": 80,
          "payments": 10,
          "reliability": 63,
          "schema": 85,
          "security": 48,
          "transparency": 71
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Instant clones from 10 seconds of audio, up to 60 seconds used on Sonic 3.6. No consent or speaker verification in the clone API.",
        "strengths": [
          "Instant clones from 10 seconds of audio, up to 60 seconds used on Sonic 3.6",
          "Pro clone training is free on Startup ($49) and Scale ($299)",
          "Clones carried over to Sonic 3.6 with the same voice IDs",
          "Dated API versions through the `Cartesia-Version` header and OpenAPI files per version",
          "`clone_voice` and `localize_voice` in the official MCP server, released 2026-09-30"
        ],
        "weaknesses": [
          "No consent or speaker verification in the clone API",
          "Terms allow training on uploads by default, with opt-out only by form",
          "Zero Data Retention doesn't cover voice cloning",
          "No cloning on the Free plan and no per-unit dollar price",
          "No security.txt"
        ],
        "agentNotes": [
          "Send `Cartesia-Version` on every call. The clone endpoint lists it as a required header",
          "Pass the speaker's recorded `language`. A clone is built from one language, add others with the accents API",
          "Keep IVC uploads under 16 MB",
          "Don't blind-retry `POST /voices/clone`. The SDK retries 429 and 5xx twice and there's no idempotency key, so check the voice list first",
          "Poll a Pro clone fine-tune until it finishes before using the voice ID"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 2.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 59.8
          }
        ],
        "editorialScores": {
          "ergonomics": 65,
          "maintenance": 80,
          "payments": 10,
          "reliability": 63,
          "schema": 85,
          "security": 48,
          "transparency": 60
        },
        "provenanceScore": 82
      },
      "connect": {
        "http": "curl -X POST https://api.cartesia.ai/voices/clone -H \"Authorization: Bearer $CARTESIA_API_KEY\" \\\n  -H \"Cartesia-Version: 2026-08-14\" -F clip=@sample.wav -F name=\"Support voice\" -F language=en",
        "claudeCode": "claude mcp add --transport http --scope user cartesia https://mcp.cartesia.ai/mcp",
        "config": {
          "mcpServers": {
            "cartesia": {
              "args": [
                "cartesia-mcp"
              ],
              "command": "uvx",
              "env": {
                "CARTESIA_API_KEY": "${CARTESIA_API_KEY}"
              }
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/voice.clone",
        "tool": "https://letme.dev/cartesia-voice-cloning"
      },
      "sameCompany": [
        "cartesia-tts"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "Pro plan",
          "unit": "month",
          "usd": 5,
          "note": "instant voice cloning"
        },
        {
          "item": "Startup plan",
          "unit": "month",
          "usd": 49,
          "note": "2 PVC slots, training free"
        },
        {
          "item": "Scale plan",
          "unit": "month",
          "usd": 299,
          "note": "4 PVC slots"
        }
      ],
      "provenance": {
        "legalEntity": "Cartesia AI, Inc.",
        "domain": "cartesia.ai",
        "domainRegistered": "2023-05-10",
        "endpointOnVendorDomain": true,
        "terms": "https://www.cartesia.ai/legal/terms",
        "privacy": "https://www.cartesia.ai/legal/privacy",
        "statusPage": "https://status.cartesia.ai",
        "changelog": "https://docs.cartesia.ai/changelog/2026",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "score": 82
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/cartesia-voice-cloning.json",
      "live": {
        "slug": "cartesia-voice-cloning",
        "probe": {
          "target": "https://api.cartesia.ai",
          "method": "get",
          "lastAt": "2026-10-04T23:48:06.303808341Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 39,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 39,
          "p95ms24h": 115,
          "samples24h": 272,
          "samples30d": 1100,
          "days": [
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              "date": "2026-09-30",
              "probes": 35,
              "ok": 35
            },
            {
              "date": "2026-10-01",
              "probes": 276,
              "ok": 276
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
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            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 270,
              "ok": 270
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.cartesia.ai",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-04T23:49:07.020768147Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "cartesia-ai/cartesia-python",
            "version": "v4.2.0",
            "released": "2026-09-02",
            "seenAt": "2026-10-04T16:23:16.436496966Z"
          },
          {
            "registry": "npm",
            "name": "@cartesia/cartesia-js",
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            "seenAt": "2026-10-04T16:23:14.144039735Z"
          },
          {
            "registry": "pypi",
            "name": "cartesia",
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            "released": "2026-09-02",
            "seenAt": "2026-10-04T16:23:14.431520294Z"
          },
          {
            "registry": "pypi",
            "name": "cartesia-mcp",
            "version": "0.26.0",
            "released": "2026-09-30",
            "seenAt": "2026-10-04T16:23:14.543947064Z"
          }
        ],
        "githubStars": 133,
        "npmWeekly": 108942,
        "pypiWeekly": 188249,
        "securityTxt": {
          "url": "https://cartesia.ai/.well-known/security.txt",
          "state": "valid",
          "expires": "2027-10-03T00:00:00.000Z",
          "checkedAt": "2026-10-04T15:15:57.920556028Z"
        },
        "llmsTxt": {
          "url": "https://docs.cartesia.ai/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:17:25.383615846Z"
        },
        "domain": {
          "domain": "cartesia.ai",
          "registered": "2023-05-10",
          "source": "https://rdap.identitydigital.services/rdap/domain/cartesia.ai",
          "checkedAt": "2026-10-04T13:04:05.26596839Z"
        },
        "updatedAt": "2026-10-04T23:49:07.020768147Z"
      }
    },
    "b": {
      "slug": "fish-audio-voice-cloning",
      "name": "Fish Audio Voice Cloning API",
      "vendor": "Fish Audio",
      "vendorUrl": "https://fish.audio",
      "kind": "model",
      "category": "voice-cloning",
      "summary": "Fish Audio's API creates reusable voice clones from audio samples and generates candidate voices from text prompts.",
      "url": "https://www.anchorterminal.com/tools/fish-audio-voice-cloning",
      "markdownUrl": "https://www.anchorterminal.com/tools/fish-audio-voice-cloning.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/fish-audio-voice-cloning.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/fish-audio-voice-cloning.json",
      "repo": "https://github.com/fishaudio/fish-audio-python",
      "license": "Apache-2.0 (Python SDK)",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.fish.audio",
      "packages": [
        {
          "registry": "pypi",
          "name": "fish-audio-sdk"
        },
        {
          "registry": "npm",
          "name": "fish-audio"
        }
      ],
      "auth": "api-key",
      "authNotes": "`Authorization: Bearer` API key. Voice design also needs a `model: voice-design-1` header.",
      "pricing": "usage",
      "pricingNotes": "Prepaid pay as you go with no subscription. No published fee for creating a voice model. Speech from a clone costs $15 per million UTF-8 bytes on `s2.1-pro`, or $0 on `s2.1-pro-free` under fair use. Voice design is $0.01 per successful request whatever the number of candidates. Concurrency rises with total prepaid spend. Separate app plans (Plus $11, Pro $75 a month) set voice slots in the web app (https://docs.fish.audio/developer-guide/models-pricing/pricing-and-rate-limits).",
      "priceSummary": "$0.01 / call",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402 or machine payment in the docs or pricing (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 218,
        "npmWeekly": 6392,
        "pypiWeekly": 37344,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.fish.audio/developer-guide/core-features/creating-models",
      "llmsTxt": "https://docs.fish.audio/llms.txt",
      "openapi": "https://docs.fish.audio/api-reference/openapi.json",
      "capabilities": [
        "voice.clone",
        "voice.design",
        "speech.tts"
      ],
      "tags": [
        "hosted",
        "usage-priced",
        "prepaid",
        "python",
        "typescript",
        "openapi",
        "llms-txt",
        "open-weights",
        "self-hosted"
      ],
      "lastRelease": "2026-03-10",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 51.5,
        "grade": "D",
        "agentReady": false,
        "rank": 348,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 7,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 65,
          "maintenance": 13,
          "payments": 30,
          "reliability": 65,
          "schema": 79,
          "security": 28,
          "transparency": 61
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Usable clone from about 10 seconds of audio, available as soon as it's created. No consent or speaker verification in the API.",
        "strengths": [
          "Usable clone from about 10 seconds of audio, available as soon as it's created",
          "Inline cloning per request, with no model to store",
          "Voice design at $0.01 per successful request, failed requests not billed",
          "One 10 minute incident on the status page in the last 90 days",
          "Open-weights S2-Pro for self-hosting under a research licence"
        ],
        "weaknesses": [
          "No consent or speaker verification in the API",
          "Terms take a perpetual, irrevocable licence to uploads, including for training, with no opt-out",
          "Changelog stops at March 2026, s2.1-pro and voice design aren't in it",
          "No 429 or retry guidance despite concurrency caps of 5 to 50",
          "No security.txt, SOC 2 or subprocessor list found"
        ],
        "agentNotes": [
          "Send 2 or 3 clean single-speaker clips with matching `texts`, or the API runs ASR on them",
          "Pass the model `_id` as `reference_id` in TTS. Check `state` before relying on it",
          "For one-off voices send `references` inline to `/v1/tts` instead of creating a model",
          "Send the `model: voice-design-1` header on voice design calls",
          "Keep concurrency at 5 until prepaid spend passes $100, there's no documented retry guidance"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 2.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "D",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 51.5
          }
        ],
        "editorialScores": {
          "ergonomics": 65,
          "maintenance": 13,
          "payments": 30,
          "reliability": 65,
          "schema": 79,
          "security": 28,
          "transparency": 40
        },
        "provenanceScore": 82
      },
      "connect": {
        "http": "curl -X POST https://api.fish.audio/model -H \"Authorization: Bearer $FISH_API_KEY\" \\\n  -F type=tts -F train_mode=fast -F title=\"Support voice\" -F voices=@sample.wav"
      },
      "letme": {
        "capability": "https://letme.dev/voice.clone",
        "tool": "https://letme.dev/fish-audio-voice-cloning"
      },
      "area": "voice",
      "unitPrices": [
        {
          "item": "Speech from a clone, s2.1-pro",
          "unit": "1m-chars",
          "usd": 15,
          "note": "per million UTF-8 bytes, not characters"
        },
        {
          "item": "Voice design, voice-design-1",
          "unit": "call",
          "usd": 0.01,
          "note": "per successful request, up to 4 candidates"
        }
      ],
      "provenance": {
        "legalEntity": "Hanabi AI Inc.",
        "domain": "fish.audio",
        "domainRegistered": "2023-12-11",
        "endpointOnVendorDomain": true,
        "terms": "https://fish.audio/terms/",
        "privacy": "https://fish.audio/privacy/",
        "statusPage": "https://status.fish.audio",
        "changelog": "https://docs.fish.audio/developer-guide/getting-started/changelog",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "score": 82
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/fish-audio-voice-cloning.json",
      "live": {
        "slug": "fish-audio-voice-cloning",
        "probe": {
          "target": "https://api.fish.audio",
          "method": "get",
          "lastAt": "2026-10-04T23:48:08.532485798Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 136,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 146,
          "p95ms24h": 229,
          "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.fish.audio",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-04T21:40:01.923099604Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "fishaudio/fish-audio-python",
            "version": "fish-audio-sdk-v1.3.0",
            "released": "2026-03-10",
            "seenAt": "2026-10-04T16:27:22.299968541Z"
          },
          {
            "registry": "npm",
            "name": "fish-audio",
            "version": "0.1.0",
            "seenAt": "2026-10-04T16:27:21.504901547Z"
          },
          {
            "registry": "pypi",
            "name": "fish-audio-sdk",
            "version": "1.3.0",
            "released": "2026-03-10",
            "seenAt": "2026-10-04T16:27:17.774660475Z"
          }
        ],
        "githubStars": 221,
        "npmWeekly": 5189,
        "pypiWeekly": 34809,
        "securityTxt": {
          "url": "https://fish.audio/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:51.233424924Z"
        },
        "llmsTxt": {
          "url": "https://docs.fish.audio/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:17:47.200959542Z"
        },
        "domain": {
          "domain": "fish.audio",
          "registered": "2023-12-11",
          "source": "https://rdap.centralnic.com/audio/domain/fish.audio",
          "checkedAt": "2026-10-04T13:03:37.042191177Z"
        },
        "pages": [
          {
            "url": "https://docs.fish.audio/developer-guide/getting-started/changelog",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-04T15:43:37.719959839Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "611e4f26428f"
          },
          {
            "url": "https://docs.fish.audio/developer-guide/models-pricing/deprecations",
            "kind": "deprecations",
            "status": 200,
            "checkedAt": "2026-10-04T15:43:40.541228558Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "647eba9cace8"
          },
          {
            "url": "https://docs.fish.audio/developer-guide/models-pricing/pricing-and-rate-limits",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-04T15:43:42.536270652Z",
            "changedAt": "2026-10-02T15:20:05.654193458Z",
            "fingerprint": "e6501c3af768"
          },
          {
            "url": "https://fish.audio/privacy/",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-04T15:44:45.172836492Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "14953e34f56f"
          },
          {
            "url": "https://fish.audio/terms/",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-04T15:44:47.22135028Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "659fc3527722"
          }
        ],
        "updatedAt": "2026-10-04T23:48:08.532485798Z"
      }
    },
    "summary": "Cartesia Voice Cloning API + MCP has a score of 59.8 (C) against Fish Audio Voice Cloning API's 51.5 (D). Both do voice clone. The largest gap is maintenance \u0026 community, 67 points."
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-fish-audio-voice-cloning",
    "json": "https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-fish-audio-voice-cloning.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-fish-audio-voice-cloning.md",
    "slim": "https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-fish-audio-voice-cloning.min.md"
  },
  "markdown": "Cartesia Voice Cloning API + MCP has a score of 59.8 (C) against Fish Audio Voice Cloning API's 51.5 (D). Both do voice clone. The largest gap is maintenance \u0026 community, 67 points.\n\n- Cartesia Voice Cloning API + MCP: grade C, 59.8/100, rank #257 of 452. Markdown https://www.anchorterminal.com/tools/cartesia-voice-cloning.md · JSON https://www.anchorterminal.com/api/v1/tools/cartesia-voice-cloning.json\n- Fish Audio Voice Cloning API: grade D, 51.5/100, rank #348 of 452. Markdown https://www.anchorterminal.com/tools/fish-audio-voice-cloning.md · JSON https://www.anchorterminal.com/api/v1/tools/fish-audio-voice-cloning.json\n\n## Which one, for what\n\nPick Cartesia Voice Cloning API + MCP for schema \u0026 documentation (+6), security \u0026 auth (+20), maintenance \u0026 community (+67), transparency \u0026 trust (+10).\n\nPick Fish Audio Voice Cloning API for payments \u0026 pricing (+20).\n\n## Score by category\n\n| Category | Weight | Cartesia Voice Cloning API + MCP | Fish Audio Voice Cloning API | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 63 | 65 | Fish Audio Voice Cloning API +2 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 85 | 79 | Cartesia Voice Cloning API + MCP +6 |\n| Agent ergonomics | 13% (16.2 this run) | 65 | 65 | even |\n| Security \u0026 auth | 14% (17.5 this run) | 48 | 28 | Cartesia Voice Cloning API + MCP +20 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 10 | 30 | Fish Audio Voice Cloning API +20 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 80 | 13 | Cartesia Voice Cloning API + MCP +67 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 71 | 61 | Cartesia Voice Cloning API + MCP +10 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **59.8 · C** | **51.5 · D** | |\n\n## Facts side by side\n\n| Fact | Cartesia Voice Cloning API + MCP | Fish Audio Voice Cloning API |\n| --- | --- | --- |\n| Kind | Model API | Model API |\n| Vendor | Cartesia | Fish Audio |\n| Hosted endpoint | `https://api.cartesia.ai` | `https://api.fish.audio` |\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 | Apache-2.0 (SDKs) | Apache-2.0 (Python SDK) |\n| Tools exposed | 19 | 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 | not listed | not listed |\n| Last release | 2026-09-30 | 2026-03-10 |\n| Popularity | 133 stars, 166k npm/wk, 177k PyPI/wk | 218 stars, 6.4k npm/wk, 37k PyPI/wk |\n| Agent reviews | 2.5/5 (2) | 2.5/5 (2) |\n\n## Verdicts\n\n**Cartesia Voice Cloning API + MCP.** Instant clones from 10 seconds of audio, up to 60 seconds used on Sonic 3.6. No consent or speaker verification in the clone API.\n\n**Fish Audio Voice Cloning API.** Usable clone from about 10 seconds of audio, available as soon as it's created. No consent or speaker verification in the API.\n\n## Before you call either\n\n### Cartesia Voice Cloning API + MCP\n\n1. Send `Cartesia-Version` on every call. The clone endpoint lists it as a required header\n2. Pass the speaker's recorded `language`. A clone is built from one language, add others with the accents API\n3. Keep IVC uploads under 16 MB\n4. Don't blind-retry `POST /voices/clone`. The SDK retries 429 and 5xx twice and there's no idempotency key, so check the voice list first\n5. Poll a Pro clone fine-tune until it finishes before using the voice ID\n\n### Fish Audio Voice Cloning API\n\n1. Send 2 or 3 clean single-speaker clips with matching `texts`, or the API runs ASR on them\n2. Pass the model `_id` as `reference_id` in TTS. Check `state` before relying on it\n3. For one-off voices send `references` inline to `/v1/tts` instead of creating a model\n4. Send the `model: voice-design-1` header on voice design calls\n5. Keep concurrency at 5 until prepaid spend passes $100, there's no documented retry guidance\n\n## Other comparisons with Cartesia Voice Cloning API + MCP or Fish Audio Voice Cloning API\n\n- [Cartesia Voice Cloning API + MCP vs ElevenLabs Voice Cloning and Voice Design API](https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-elevenlabs-voice-cloning.md)\n- [Cartesia Voice Cloning API + MCP vs Hume Octave Voice Design and Cloning + MCP](https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-hume-voice-cloning.md)\n- [Cartesia Voice Cloning API + MCP vs Murf Voice Cloning API](https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-murf-voice-cloning.md)\n- [Cartesia Voice Cloning API + MCP vs PlayHT Voice Cloning API](https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-playht-voice-cloning.md)\n- [Cartesia Voice Cloning API + MCP vs Resemble AI Voice Cloning API](https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-resemble-ai-voice-cloning.md)\n- [Cartesia Voice Cloning API + MCP vs Soniox Voice Cloning](https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-soniox-voice-cloning.md)\n- [Cartesia Voice Cloning API + MCP vs Speechify API Voice Cloning](https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-speechify-voice-cloning.md)\n- [Cartesia Voice Cloning API + MCP vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/cartesia-voice-cloning-vs-ultravox-voice-cloning.md)\n- [ElevenLabs Voice Cloning and Voice Design API vs Fish Audio Voice Cloning API](https://www.anchorterminal.com/compare/elevenlabs-voice-cloning-vs-fish-audio-voice-cloning.md)\n- [Fish Audio Voice Cloning API vs Hume Octave Voice Design and Cloning + MCP](https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-hume-voice-cloning.md)\n- [Fish Audio Voice Cloning API vs Murf Voice Cloning API](https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-murf-voice-cloning.md)\n- [Fish Audio Voice Cloning API vs PlayHT Voice Cloning API](https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-playht-voice-cloning.md)\n- [Fish Audio Voice Cloning API vs Resemble AI Voice Cloning API](https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-resemble-ai-voice-cloning.md)\n- [Fish Audio Voice Cloning API vs Soniox Voice Cloning](https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-soniox-voice-cloning.md)\n- [Fish Audio Voice Cloning API vs Speechify API Voice Cloning](https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-speechify-voice-cloning.md)\n- [Fish Audio Voice Cloning API vs Ultravox Voice Cloning](https://www.anchorterminal.com/compare/fish-audio-voice-cloning-vs-ultravox-voice-cloning.md)\n",
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      {
        "name": "Cartesia Voice Cloning API + MCP vs Fish Audio Voice Cloning API",
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    "description": "Cartesia Voice Cloning API + MCP has a score of 59.8 (C) against Fish Audio Voice Cloning API's 51.5 (D). Both do voice clone. The largest gap is maintenance \u0026 community, 67 points. Category scores, facts, verdicts and agent notes side by side.",
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      "Cartesia Voice Cloning API + MCP C 59.8",
      "Fish Audio Voice Cloning API D 51.5",
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    "h1": "Cartesia Voice Cloning API + MCP vs Fish Audio Voice Cloning API",
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    "published": "2026-10-01",
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    "title": "Cartesia Voice Cloning API + MCP vs Fish Audio Voice Cloning API",
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