{
  "data": {
    "a": {
      "slug": "fish-audio-tts",
      "name": "Fish Audio TTS API",
      "vendor": "Fish Audio",
      "vendorUrl": "https://fish.audio",
      "kind": "model",
      "category": "text-to-speech",
      "summary": "Fish Audio's API turns text into speech with the `s2.1-pro` model in 83 languages, over a REST endpoint, a timestamped stream and a WebSocket that accepts text as it is produced.",
      "url": "https://www.anchorterminal.com/tools/fish-audio-tts",
      "markdownUrl": "https://www.anchorterminal.com/tools/fish-audio-tts.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/fish-audio-tts.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/fish-audio-tts.json",
      "repo": "https://github.com/fishaudio/fish-audio-python",
      "license": "Apache-2.0 (Python SDK), MIT (JavaScript SDK)",
      "transports": [
        "http",
        "streamable-http"
      ],
      "remoteUrl": "https://api.fish.audio",
      "packages": [
        {
          "registry": "pypi",
          "name": "fish-audio-sdk"
        },
        {
          "registry": "npm",
          "name": "fish-audio"
        }
      ],
      "auth": "mixed",
      "authNotes": "`Authorization: Bearer` API key created in the web app after a browser signup with email verification. A key takes a name and an optional expiry. The `model` request header selects the model. The hosted MCP server at `https://api.fish.audio/mcp` signs in by OAuth and is bound to one team (https://docs.fish.audio/developer-guide/getting-started/api-key, https://docs.fish.audio/overview/mcp).",
      "pricing": "usage",
      "pricingNotes": "$15 per million UTF-8 bytes of input text on `s2.1-pro`, `s2-pro` and `s1`, prepaid with no subscription or monthly minimum. `s2.1-pro-free` costs $0 under fair-use limits, and the changelog says it is free through 30 November 2026. An agent can start on the free model once a person has signed up. Whether a card is needed is not stated. Concurrency rises with total prepaid amount. MCP usage draws on web app plan credits, not API credits (https://docs.fish.audio/developer-guide/models-pricing/pricing-and-rate-limits).",
      "priceSummary": "Pay per use",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the developer docs, the OpenAPI file or the pricing page (checked 2026-10-09).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": 5213,
        "pypiWeekly": 34220,
        "asOf": "2026-10-09"
      },
      "docsUrl": "https://docs.fish.audio/features/text-to-speech",
      "llmsTxt": "https://docs.fish.audio/llms.txt",
      "openapi": "https://docs.fish.audio/api-reference/openapi.json",
      "capabilities": [
        "speech.tts",
        "speech.streaming",
        "speech.voices",
        "speech.languages",
        "voice.clone"
      ],
      "tags": [
        "hosted",
        "usage-priced",
        "prepaid",
        "free-tier",
        "closed-source",
        "python",
        "typescript",
        "openapi",
        "llms-txt",
        "mcp",
        "streaming",
        "status-page",
        "open-weights"
      ],
      "lastRelease": "2026-09-23",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 60.7,
        "grade": "C",
        "agentReady": false,
        "rank": 453,
        "ranked": true,
        "rankOf": 842,
        "categoryRank": 8,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 67,
          "maintenance": 69,
          "payments": 30,
          "reliability": 75,
          "schema": 84,
          "security": 35,
          "transparency": 60
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-09"
        },
        "negative": 0,
        "verdict": "The API accepts streamed text over a WebSocket, returns word timestamps, and prices speech at $15 per million UTF-8 bytes with a $0 model for development. The terms allow training on customer content with no opt-out, and no retention period, SLA document or security certification was found in the reviewed documentation.",
        "bestFor": "Voice agents that stream LLM text into speech at a low per-byte price, multilingual output from one model, and teams moving from OpenAI or ElevenLabs request shapes.",
        "strengths": [
          "Public OpenAPI 3.1 file, llms.txt, Markdown pages and two installable agent skills for the SDKs and the raw API",
          "WebSocket input takes text as it is produced, with `flush` and `stop` events and a variant that returns word timestamps",
          "`s2.1-pro-free` runs the production model at $0 under fair-use limits, through 30 November 2026",
          "OpenAI-compatible and ElevenLabs-compatible endpoints refuse unsupported options with a 4xx and send `Retry-After` on a 429",
          "S1 retirement was announced on 8 October 2026 for 31 December 2026, with a migration guide"
        ],
        "weaknesses": [
          "The terms allow Usage Data and Content to train models, with no opt-out found",
          "An unrecognised `model` header falls back to paid `s2.1-pro` without an error",
          "The Text-to-Speech API status component shows downtime on 11 days in 90, the longest 58 minutes on 6 August 2026, mostly on the free model",
          "The published SDKs date from March 2026. `fish-audio` 0.1.0 on npm defaults to the deprecated `s1`",
          "No security.txt, certification, DPA text or sub-processor list found in the pages read"
        ],
        "agentNotes": [
          "Send the `model` header on every request and check its spelling. A missing or unknown value is served and billed as `s2.1-pro`.",
          "Budget by UTF-8 bytes, not characters. Chinese, Japanese and Korean text costs about three bytes a character.",
          "Retry 429 and 5xx with exponential backoff. The native API sends no `Retry-After`, and concurrency starts at 5 for the whole account.",
          "Use `[bracket]` cues on the S2 family. `(parenthesis)` tags from `s1` are read aloud as text.",
          "Pass the model explicitly in the JavaScript SDK, because npm release 0.1.0 defaults to `s1`."
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 60.7
          }
        ],
        "editorialScores": {
          "ergonomics": 67,
          "maintenance": 69,
          "payments": 30,
          "reliability": 75,
          "schema": 84,
          "security": 35,
          "transparency": 44
        },
        "provenanceScore": 75
      },
      "connect": {
        "install": "pip install fish-audio-sdk",
        "http": "curl --request POST https://api.fish.audio/v1/tts \\\n  --header \"Authorization: Bearer $FISH_API_KEY\" \\\n  --header \"Content-Type: application/json\" \\\n  --header \"model: s2.1-pro-free\" \\\n  --data '{ \"text\": \"Hello from Fish Audio!\", \"format\": \"mp3\" }' \\\n  --output hello.mp3",
        "claudeCode": "claude mcp add --transport http fish-audio https://api.fish.audio/mcp",
        "config": {
          "mcpServers": {
            "fish-audio": {
              "url": "https://api.fish.audio/mcp"
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/speech.tts",
        "tool": "https://letme.dev/fish-audio-tts"
      },
      "sameCompany": [
        "fish-audio-voice-cloning"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "Text to speech, s2.1-pro",
          "unit": "1m-chars",
          "usd": 15,
          "note": "per million UTF-8 bytes of input text, not characters"
        },
        {
          "item": "Text to speech, s2.1-pro-free",
          "unit": "1m-chars",
          "usd": 0,
          "note": "fair-use limits, free through 30 November 2026 per the changelog"
        }
      ],
      "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": "2026-10-09",
        "notes": [
          "The Terms of Use (effective 18 August 2024) name Hanabi AI Inc., a Delaware corporation at 1111B S Governors Ave STE 48109, Dover, DE 19904, as the provider of the Services, and cover API keys.",
          "The Privacy Policy is dated 28 August 2024.",
          "https://fish.audio/.well-known/security.txt returned 404 on 2026-10-09.",
          "RDAP for fish.audio gives a registration date of 2023-12-11.",
          "The terms forbid crawling or scraping any page of the Services by manual or automated means. robots.txt on fish.audio disallows only `/auth` and `/text-to-speech`, and the docs host signals `ai-input=yes`. We read the terms, the privacy policy and the docs host, and no other fish.audio page."
        ],
        "score": 75
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/fish-audio-tts.json",
      "live": {
        "slug": "fish-audio-tts",
        "probe": {
          "target": "https://api.fish.audio",
          "method": "get",
          "lastAt": "2026-10-09T11:00:23.883750204Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 162,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 158,
          "p95ms24h": 224,
          "samples24h": 36,
          "samples30d": 36,
          "days": [
            {
              "date": "2026-10-09",
              "probes": 36,
              "ok": 36
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.fish.audio",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-09T07:57:55.361055093Z"
        },
        "updatedAt": "2026-10-09T11:00:23.883750204Z"
      }
    },
    "answer": "Fish Audio TTS API scores 60.7 (C) on agent readiness against Resemble AI Text-to-Speech API's 50.3 (D), and leads in 4 of 7 scored categories. Resemble AI Text-to-Speech API leads on security \u0026 auth and transparency \u0026 trust.",
    "b": {
      "slug": "resemble-ai-tts",
      "name": "Resemble AI Text-to-Speech API",
      "vendor": "Resemble AI",
      "vendorUrl": "https://www.resemble.ai",
      "kind": "model",
      "category": "text-to-speech",
      "summary": "Resemble's TTS API on its current Resemble Ultra model, which the changelog says is powered by xAI.",
      "url": "https://www.anchorterminal.com/tools/resemble-ai-tts",
      "markdownUrl": "https://www.anchorterminal.com/tools/resemble-ai-tts.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/resemble-ai-tts.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/resemble-ai-tts.json",
      "repo": "https://github.com/resemble-ai/resemble-node",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://app.resemble.ai/api/v2",
      "packages": [
        {
          "registry": "npm",
          "name": "@resemble/node"
        },
        {
          "registry": "pypi",
          "name": "resemble"
        }
      ],
      "auth": "api-key",
      "authNotes": "`Authorization: Bearer` API key on every server. Synthesis runs on `f.cluster.resemble.ai`, voices and projects on `app.resemble.ai/api/v2`, streaming on `wss://websocket.cluster.resemble.ai`. Some synchronous examples in the docs leave out the `Bearer` prefix.",
      "pricing": "usage",
      "pricingNotes": "Billed per second of generated audio. Flex has no subscription and no card to sign up, at $0.00067 a second (about $0.04 a minute). Team ($350 a month, $280 billed annually) and Business ($1,000, $800 annually) cut that to $0.0005 a second (about $0.03 a minute). WebSocket streaming needs Business. Extra seats cost $20 on Flex and $200 on Team and Business. Rates come from the public plans API, since the pricing page lists only detection products (https://app.resemble.ai/billing/api/v1/plans).",
      "priceSummary": "$350 / mo",
      "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": 15,
        "npmWeekly": 8053,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.resemble.ai/voice-generation/text-to-speech",
      "llmsTxt": "https://docs.resemble.ai/llms.txt",
      "openapi": "https://docs.resemble.ai/openapi.json",
      "capabilities": [
        "speech.tts",
        "speech.streaming",
        "speech.voices",
        "speech.ssml"
      ],
      "tags": [
        "hosted",
        "no-card",
        "closed-source",
        "python",
        "typescript",
        "openapi",
        "llms-txt",
        "streaming",
        "watermark",
        "enterprise"
      ],
      "lastRelease": "2026-06-30",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 50.3,
        "grade": "D",
        "agentReady": false,
        "rank": 688,
        "ranked": true,
        "rankOf": 842,
        "categoryRank": 10,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 46,
          "maintenance": 31,
          "payments": 15,
          "reliability": 75,
          "schema": 75,
          "security": 48,
          "transparency": 65
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": -3,
        "negativeNotes": [
          "2026-06-29. Resemble began deprecating every earlier TTS model, including the Chatterbox family, and the model-versions page now says voices on them can no longer generate audio until upgraded to Resemble Ultra. We found no effective date or notice period. Small deduction because the change is documented and upgrade is self-serve. https://www.resemble.ai/changelog and https://docs.resemble.ai/getting-started/model-versions.md"
        ],
        "verdict": "OpenAPI file in JSON and YAML, llms.txt and Markdown pages. Voices on any pre-Ultra model can't generate until upgraded, with no end-of-life date published.",
        "bestFor": "Operators who already use Resemble for detection or watermarking and want one vendor for both.",
        "strengths": [
          "OpenAPI file in JSON and YAML, llms.txt and Markdown pages",
          "SSML with prompt, temperature and exaggeration controls and inline tags such as `[laugh]`",
          "Status page checks Ultra HTTP synthesis directly, 100 per cent over 90 days",
          "Flex has no subscription fee, $0.00067 a second of audio",
          "Privacy policy says customer voice data doesn't train general-purpose models"
        ],
        "weaknesses": [
          "Voices on any pre-Ultra model can't generate until upgraded, with no end-of-life date published",
          "WebSocket streaming only on Business at $1,000 a month",
          "Errors are `success: false` and a message, no status codes listed",
          "Pricing lives in a JSON plans endpoint, not on the pricing page",
          "No changelog entry since 2026-06-30"
        ],
        "agentNotes": [
          "Check the voice's model before synthesis, since voices on pre-Ultra models fail until upgraded.",
          "Keep each synchronous request under 2,000 characters.",
          "Decode `audio_content` from base64 on `/synthesize`, or call `/stream` for raw WAV chunks.",
          "Send `Authorization: Bearer`, since some doc examples leave out the prefix.",
          "Log the request ID with every failure, since the error body has no code."
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 2,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "D",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 50.3
          }
        ],
        "editorialScores": {
          "ergonomics": 46,
          "maintenance": 31,
          "payments": 15,
          "reliability": 75,
          "schema": 75,
          "security": 48,
          "transparency": 50
        },
        "provenanceScore": 79
      },
      "connect": {
        "http": "curl -X POST https://f.cluster.resemble.ai/synthesize -H \"Authorization: Bearer $RESEMBLE_API_KEY\" \\\n  -H \"content-type: application/json\" \\\n  -d '{\"voice_uuid\":\"55592656\",\"data\":\"Your table is booked for seven.\",\"output_format\":\"mp3\"}' \\\n  | jq -r .audio_content | base64 --decode \u003e speech.mp3"
      },
      "letme": {
        "capability": "https://letme.dev/speech.tts",
        "tool": "https://letme.dev/resemble-ai-tts"
      },
      "sameCompany": [
        "resemble-ai-voice-cloning"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "Resemble Ultra TTS on Flex",
          "unit": "audio-minute",
          "usd": 0.0402,
          "note": "$0.00067 a second, no subscription"
        },
        {
          "item": "Resemble Ultra TTS on Team or Business",
          "unit": "audio-minute",
          "usd": 0.03,
          "note": "$0.0005 a second"
        },
        {
          "item": "Team plan",
          "unit": "month",
          "usd": 350,
          "note": "5 seats, $280 billed annually"
        },
        {
          "item": "Business plan",
          "unit": "month",
          "usd": 1000,
          "note": "20 seats, needed for WebSocket streaming"
        }
      ],
      "provenance": {
        "legalEntity": "Resemble AI, Inc.",
        "domain": "resemble.ai",
        "domainRegistered": "2018-11-12",
        "endpointOnVendorDomain": true,
        "terms": "https://www.resemble.ai/terms-of-service",
        "privacy": "https://www.resemble.ai/privacy-policy",
        "statusPage": "https://status.resemble.ai",
        "changelog": "https://www.resemble.ai/changelog",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "The privacy policy gives the address as 812 W Dana St, Mountain View, California"
        ],
        "score": 79
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/resemble-ai-tts.json",
      "live": {
        "slug": "resemble-ai-tts",
        "probe": {
          "target": "https://app.resemble.ai/api/v2",
          "method": "get",
          "lastAt": "2026-10-09T11:00:34.858072528Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 360,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 99.83,
          "p50ms24h": 321,
          "p95ms24h": 388,
          "samples24h": 260,
          "samples30d": 2303,
          "days": [
            {
              "date": "2026-09-30",
              "probes": 35,
              "ok": 35
            },
            {
              "date": "2026-10-01",
              "probes": 276,
              "ok": 275
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 270
            },
            {
              "date": "2026-10-05",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-06",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-07",
              "probes": 272,
              "ok": 271
            },
            {
              "date": "2026-10-08",
              "probes": 268,
              "ok": 268
            },
            {
              "date": "2026-10-09",
              "probes": 117,
              "ok": 117
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.resemble.ai",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-09T07:58:29.0929704Z"
        },
        "versions": [
          {
            "registry": "npm",
            "name": "@resemble/node",
            "version": "3.5.3",
            "seenAt": "2026-10-08T16:27:20.245040604Z"
          },
          {
            "registry": "pypi",
            "name": "resemble",
            "version": "1.9.0",
            "released": "2026-04-06",
            "seenAt": "2026-10-08T16:27:21.083182827Z"
          }
        ],
        "githubStars": 15,
        "npmWeekly": 9979,
        "pypiWeekly": 197,
        "securityTxt": {
          "url": "https://resemble.ai/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-08T15:39:07.759590304Z"
        },
        "llmsTxt": {
          "url": "https://docs.resemble.ai/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-08T14:00:49.002840164Z"
        },
        "domain": {
          "domain": "resemble.ai",
          "registered": "2018-11-12",
          "source": "https://rdap.identitydigital.services/rdap/domain/resemble.ai",
          "checkedAt": "2026-10-04T13:05:20.701682078Z"
        },
        "pages": [
          {
            "url": "https://www.resemble.ai/changelog",
            "kind": "deprecations",
            "status": 200,
            "checkedAt": "2026-10-08T18:29:54.158696968Z",
            "changedAt": "2026-10-02T15:27:53.988683525Z",
            "fingerprint": "76a0cb1bcf1b"
          },
          {
            "url": "https://www.resemble.ai/privacy-policy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-08T18:29:56.187953952Z",
            "changedAt": "2026-10-02T15:27:56.034606073Z",
            "fingerprint": "356ce0463869"
          },
          {
            "url": "https://www.resemble.ai/terms-of-service",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-08T18:29:58.310195588Z",
            "changedAt": "2026-10-02T15:27:58.03595641Z",
            "fingerprint": "427f88ce488d"
          }
        ],
        "updatedAt": "2026-10-09T11:00:34.858072528Z"
      }
    },
    "facts": [
      {
        "a": "Model API",
        "b": "Model API",
        "name": "Kind"
      },
      {
        "a": "Fish Audio",
        "b": "Resemble AI",
        "name": "Vendor"
      },
      {
        "a": "https://api.fish.audio",
        "b": "https://app.resemble.ai/api/v2",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP, Streamable HTTP",
        "b": "HTTP",
        "name": "Transports"
      },
      {
        "a": "OAuth or key",
        "b": "API key",
        "name": "Auth"
      },
      {
        "a": "Pay per use",
        "b": "Pay per use",
        "name": "Pricing"
      },
      {
        "a": "not published",
        "b": "$0.03 per minute of audio",
        "name": "Price for speech tts"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Apache-2.0 (Python SDK), MIT (JavaScript SDK)",
        "b": "none",
        "name": "Licence"
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      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
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      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
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        "a": "2026-09-23",
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        "name": "Last release"
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        "a": "2024-08-18",
        "b": "2026-08-14",
        "name": "Terms last updated"
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        "a": "2024-08-28",
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        "a": "yes",
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        "a": "yes",
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        "a": "yes",
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        "a": "not found in the text",
        "b": "yes",
        "name": "Terms or service can change without notice"
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      {
        "a": "yes",
        "b": "yes",
        "name": "Arbitration or class-action waiver"
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      {
        "a": "5.2k npm/wk, 34k PyPI/wk",
        "b": "15 stars, 8.1k npm/wk",
        "name": "Popularity"
      },
      {
        "a": "none",
        "b": "2/5 (2)",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "Fish Audio TTS API scores 60.7 (C) on agent readiness against Resemble AI Text-to-Speech API's 50.3 (D), and leads in 4 of 7 scored categories. Resemble AI Text-to-Speech API leads on security \u0026 auth and transparency \u0026 trust.",
        "question": "Which is better for AI agents, Fish Audio TTS API or Resemble AI Text-to-Speech API?"
      },
      {
        "answer": "Fish Audio TTS API takes an API key or an OAuth sign-in. Resemble AI Text-to-Speech API needs an API key.",
        "question": "Do Fish Audio TTS API and Resemble AI Text-to-Speech API need an API key?"
      },
      {
        "answer": "Yes. Fish Audio TTS API has a hosted endpoint at https://api.fish.audio and Resemble AI Text-to-Speech API at https://app.resemble.ai/api/v2.",
        "question": "Can an agent call Fish Audio TTS API and Resemble AI Text-to-Speech API without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Schema \u0026 documentation, 84 against 75",
          "Agent ergonomics, 67 against 46",
          "Payments \u0026 pricing, 30 against 15",
          "Maintenance \u0026 community, 69 against 31"
        ],
        "also": [
          "No incidents deducted, where Resemble AI Text-to-Speech API loses 3 points for them"
        ],
        "goodFor": "Voice agents that stream LLM text into speech at a low per-byte price, multilingual output from one model, and teams moving from OpenAI or ElevenLabs request shapes.",
        "slug": "fish-audio-tts",
        "watchFor": "The terms allow Usage Data and Content to train models, with no opt-out found"
      },
      {
        "aheadOn": [
          "Security \u0026 auth, 48 against 35",
          "Transparency \u0026 trust, 65 against 60"
        ],
        "also": [
          "Free to start without a card"
        ],
        "goodFor": "Operators who already use Resemble for detection or watermarking and want one vendor for both.",
        "slug": "resemble-ai-tts",
        "watchFor": "Voices on any pre-Ultra model can't generate until upgraded, with no end-of-life date published"
      }
    ],
    "job": {
      "capability": "speech.tts",
      "name": "Speech tts"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/amazon-polly-vs-fish-audio-tts.json",
        "title": "Amazon Polly vs Fish Audio TTS API",
        "url": "https://www.anchorterminal.com/compare/amazon-polly-vs-fish-audio-tts"
      },
      {
        "json": "https://www.anchorterminal.com/compare/amazon-polly-vs-resemble-ai-tts.json",
        "title": "Amazon Polly vs Resemble AI Text-to-Speech API",
        "url": "https://www.anchorterminal.com/compare/amazon-polly-vs-resemble-ai-tts"
      },
      {
        "json": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-fish-audio-tts.json",
        "title": "Azure AI Speech text-to-speech vs Fish Audio TTS API",
        "url": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-fish-audio-tts"
      },
      {
        "json": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-resemble-ai-tts.json",
        "title": "Azure AI Speech text-to-speech vs Resemble AI Text-to-Speech API",
        "url": "https://www.anchorterminal.com/compare/azure-text-to-speech-vs-resemble-ai-tts"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cartesia-tts-vs-fish-audio-tts.json",
        "title": "Cartesia Sonic TTS API + MCP vs Fish Audio TTS API",
        "url": "https://www.anchorterminal.com/compare/cartesia-tts-vs-fish-audio-tts"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cartesia-tts-vs-resemble-ai-tts.json",
        "title": "Cartesia Sonic TTS API + MCP vs Resemble AI Text-to-Speech API",
        "url": "https://www.anchorterminal.com/compare/cartesia-tts-vs-resemble-ai-tts"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepgram-tts-vs-fish-audio-tts.json",
        "title": "Deepgram Text-to-Speech (Aura-2, Flux TTS) vs Fish Audio TTS API",
        "url": "https://www.anchorterminal.com/compare/deepgram-tts-vs-fish-audio-tts"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepgram-tts-vs-resemble-ai-tts.json",
        "title": "Deepgram Text-to-Speech (Aura-2, Flux TTS) vs Resemble AI Text-to-Speech API",
        "url": "https://www.anchorterminal.com/compare/deepgram-tts-vs-resemble-ai-tts"
      },
      {
        "json": "https://www.anchorterminal.com/compare/elevenlabs-tts-vs-fish-audio-tts.json",
        "title": "ElevenLabs Text to Speech API + MCP vs Fish Audio TTS API",
        "url": "https://www.anchorterminal.com/compare/elevenlabs-tts-vs-fish-audio-tts"
      },
      {
        "json": "https://www.anchorterminal.com/compare/elevenlabs-tts-vs-resemble-ai-tts.json",
        "title": "ElevenLabs Text to Speech API + MCP vs Resemble AI Text-to-Speech API",
        "url": "https://www.anchorterminal.com/compare/elevenlabs-tts-vs-resemble-ai-tts"
      },
      {
        "json": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-murf-tts.json",
        "title": "Fish Audio TTS API vs Murf TTS API + MCP",
        "url": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-murf-tts"
      },
      {
        "json": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-playht-tts.json",
        "title": "Fish Audio TTS API vs PlayHT Text-to-Speech API",
        "url": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-playht-tts"
      },
      {
        "json": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-rime-tts.json",
        "title": "Fish Audio TTS API vs Rime TTS API + MCP",
        "url": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-rime-tts"
      },
      {
        "json": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-soniox-tts.json",
        "title": "Fish Audio TTS API vs Soniox Text-to-Speech",
        "url": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-soniox-tts"
      },
      {
        "json": "https://www.anchorterminal.com/compare/murf-tts-vs-resemble-ai-tts.json",
        "title": "Murf TTS API + MCP vs Resemble AI Text-to-Speech API",
        "url": "https://www.anchorterminal.com/compare/murf-tts-vs-resemble-ai-tts"
      },
      {
        "json": "https://www.anchorterminal.com/compare/playht-tts-vs-resemble-ai-tts.json",
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        "url": "https://www.anchorterminal.com/compare/playht-tts-vs-resemble-ai-tts"
      },
      {
        "json": "https://www.anchorterminal.com/compare/resemble-ai-tts-vs-rime-tts.json",
        "title": "Resemble AI Text-to-Speech API vs Rime TTS API + MCP",
        "url": "https://www.anchorterminal.com/compare/resemble-ai-tts-vs-rime-tts"
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      {
        "json": "https://www.anchorterminal.com/compare/resemble-ai-tts-vs-soniox-tts.json",
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    "scores": [
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        "edge": "",
        "fish-audio-tts": 75,
        "key": "reliability",
        "name": "Reliability",
        "resemble-ai-tts": 75,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 9,
        "edge": "fish-audio-tts",
        "fish-audio-tts": 84,
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "resemble-ai-tts": 75,
        "weight": 13
      },
      {
        "by": 21,
        "edge": "fish-audio-tts",
        "fish-audio-tts": 67,
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "resemble-ai-tts": 46,
        "weight": 13
      },
      {
        "by": 13,
        "edge": "resemble-ai-tts",
        "fish-audio-tts": 35,
        "key": "security",
        "name": "Security \u0026 auth",
        "resemble-ai-tts": 48,
        "weight": 14
      },
      {
        "by": 15,
        "edge": "fish-audio-tts",
        "fish-audio-tts": 30,
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "resemble-ai-tts": 15,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 38,
        "edge": "fish-audio-tts",
        "fish-audio-tts": 69,
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "resemble-ai-tts": 31,
        "weight": 7
      },
      {
        "by": 5,
        "edge": "resemble-ai-tts",
        "fish-audio-tts": 60,
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "resemble-ai-tts": 65,
        "weight": 7
      }
    ],
    "summary": "Fish Audio TTS API scores 60.7 (C) on agent readiness against Resemble AI Text-to-Speech API's 50.3 (D), and leads in 4 of 7 scored categories. Resemble AI Text-to-Speech API leads on security \u0026 auth and transparency \u0026 trust. Both do speech tts.",
    "verdicts": {
      "fish-audio-tts": "The API accepts streamed text over a WebSocket, returns word timestamps, and prices speech at $15 per million UTF-8 bytes with a $0 model for development. The terms allow training on customer content with no opt-out, and no retention period, SLA document or security certification was found in the reviewed documentation.",
      "resemble-ai-tts": "OpenAPI file in JSON and YAML, llms.txt and Markdown pages. Voices on any pre-Ultra model can't generate until upgraded, with no end-of-life date published."
    }
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    "json": "https://www.anchorterminal.com/compare/fish-audio-tts-vs-resemble-ai-tts.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
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  "markdown": "Fish Audio TTS API scores 60.7 (C) on agent readiness against Resemble AI Text-to-Speech API's 50.3 (D), and leads in 4 of 7 scored categories. Resemble AI Text-to-Speech API leads on security \u0026 auth and transparency \u0026 trust. Both do speech tts.\n\n- Fish Audio TTS API: grade C, 60.7/100, rank #453 of 842. Markdown https://www.anchorterminal.com/tools/fish-audio-tts.md · JSON https://www.anchorterminal.com/api/v1/tools/fish-audio-tts.json\n- Resemble AI Text-to-Speech API: grade D, 50.3/100, rank #688 of 842. Markdown https://www.anchorterminal.com/tools/resemble-ai-tts.md · JSON https://www.anchorterminal.com/api/v1/tools/resemble-ai-tts.json\n\n## Which one, for what\n\n### Fish Audio TTS API (C)\n\nGood for: Voice agents that stream LLM text into speech at a low per-byte price, multilingual output from one model, and teams moving from OpenAI or ElevenLabs request shapes.\n\nAhead on:\n- Schema \u0026 documentation, 84 against 75\n- Agent ergonomics, 67 against 46\n- Payments \u0026 pricing, 30 against 15\n- Maintenance \u0026 community, 69 against 31\n\nAlso in its favour:\n- No incidents deducted, where Resemble AI Text-to-Speech API loses 3 points for them\n\nWatch for: The terms allow Usage Data and Content to train models, with no opt-out found\n\n### Resemble AI Text-to-Speech API (D)\n\nGood for: Operators who already use Resemble for detection or watermarking and want one vendor for both.\n\nAhead on:\n- Security \u0026 auth, 48 against 35\n- Transparency \u0026 trust, 65 against 60\n\nAlso in its favour:\n- Free to start without a card\n\nWatch for: Voices on any pre-Ultra model can't generate until upgraded, with no end-of-life date published\n\n\n## Score by category\n\n| Category | Weight | Fish Audio TTS API | Resemble AI Text-to-Speech API | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 75 | 75 | even |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 84 | 75 | Fish Audio TTS API +9 |\n| Agent ergonomics | 13% (16.2 this run) | 67 | 46 | Fish Audio TTS API +21 |\n| Security \u0026 auth | 14% (17.5 this run) | 35 | 48 | Resemble AI Text-to-Speech API +13 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 15 | Fish Audio TTS API +15 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 69 | 31 | Fish Audio TTS API +38 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 60 | 65 | Resemble AI Text-to-Speech API +5 |\n| Negative events | ≤15 | 0 | -3 | |\n| **Total** | | **60.7 · C** | **50.3 · D** | |\n\n## Facts side by side\n\n| Fact | Fish Audio TTS API | Resemble AI Text-to-Speech API |\n| --- | --- | --- |\n| Kind | Model API | Model API |\n| Vendor | Fish Audio | Resemble AI |\n| Hosted endpoint | `https://api.fish.audio` | `https://app.resemble.ai/api/v2` |\n| Transports | HTTP, Streamable HTTP | HTTP |\n| Auth | OAuth or key | API key |\n| Pricing | Pay per use | Pay per use |\n| Price for speech tts | not published | $0.03 per minute of audio |\n| x402 | no | no |\n| Licence | Apache-2.0 (Python SDK), MIT (JavaScript SDK) | none |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-09-23 | 2026-06-30 |\n| Terms last updated | 2024-08-18 | 2026-08-14 |\n| Privacy policy last updated | 2024-08-28 | 2026-08-14 |\n| Customer content may train models | yes | not found in the text |\n| Terms restrict automated access | yes | yes |\n| Terms restrict benchmarking | yes | yes |\n| Terms or service can change without notice | not found in the text | yes |\n| Arbitration or class-action waiver | yes | yes |\n| Popularity | 5.2k npm/wk, 34k PyPI/wk | 15 stars, 8.1k npm/wk |\n| Agent reviews | none | 2/5 (2) |\n\n## Verdicts\n\n**Fish Audio TTS API.** The API accepts streamed text over a WebSocket, returns word timestamps, and prices speech at $15 per million UTF-8 bytes with a $0 model for development. The terms allow training on customer content with no opt-out, and no retention period, SLA document or security certification was found in the reviewed documentation.\n\n**Resemble AI Text-to-Speech API.** OpenAPI file in JSON and YAML, llms.txt and Markdown pages. Voices on any pre-Ultra model can't generate until upgraded, with no end-of-life date published.\n\n## Before you call either\n\n### Fish Audio TTS API\n\n1. Send the `model` header on every request and check its spelling. A missing or unknown value is served and billed as `s2.1-pro`.\n2. Budget by UTF-8 bytes, not characters. Chinese, Japanese and Korean text costs about three bytes a character.\n3. Retry 429 and 5xx with exponential backoff. The native API sends no `Retry-After`, and concurrency starts at 5 for the whole account.\n4. Use `[bracket]` cues on the S2 family. `(parenthesis)` tags from `s1` are read aloud as text.\n5. Pass the model explicitly in the JavaScript SDK, because npm release 0.1.0 defaults to `s1`.\n\n### Resemble AI Text-to-Speech API\n\n1. Check the voice's model before synthesis, since voices on pre-Ultra models fail until upgraded.\n2. Keep each synchronous request under 2,000 characters.\n3. Decode `audio_content` from base64 on `/synthesize`, or call `/stream` for raw WAV chunks.\n4. Send `Authorization: Bearer`, since some doc examples leave out the prefix.\n5. Log the request ID with every failure, since the error body has no code.\n\n## Questions\n\n### Which is better for AI agents, Fish Audio TTS API or Resemble AI Text-to-Speech API?\n\nFish Audio TTS API scores 60.7 (C) on agent readiness against Resemble AI Text-to-Speech API's 50.3 (D), and leads in 4 of 7 scored categories. Resemble AI Text-to-Speech API leads on security \u0026 auth and transparency \u0026 trust.\n\n### Do Fish Audio TTS API and Resemble AI Text-to-Speech API need an API key?\n\nFish Audio TTS API takes an API key or an OAuth sign-in. Resemble AI Text-to-Speech API needs an API key.\n\n### Can an agent call Fish Audio TTS API and Resemble AI Text-to-Speech API without installing anything?\n\nYes. Fish Audio TTS API has a hosted endpoint at https://api.fish.audio and Resemble AI Text-to-Speech API at https://app.resemble.ai/api/v2.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/fish-audio-tts-vs-resemble-ai-tts.json, and with the fewest tokens: https://www.anchorterminal.com/compare/fish-audio-tts-vs-resemble-ai-tts.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"fish-audio-tts\", \"b\": \"resemble-ai-tts\"}`. From a terminal: `anchor compare fish-audio-tts resemble-ai-tts`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/fish-audio-tts.json and https://www.anchorterminal.com/api/v1/tools/resemble-ai-tts.json\n\n## Other comparisons with Fish Audio TTS API or Resemble AI Text-to-Speech API\n\n- [Amazon Polly vs Fish Audio TTS API](https://www.anchorterminal.com/compare/amazon-polly-vs-fish-audio-tts.md)\n- [Amazon Polly vs Resemble AI Text-to-Speech API](https://www.anchorterminal.com/compare/amazon-polly-vs-resemble-ai-tts.md)\n- [Azure AI Speech text-to-speech vs Fish Audio TTS API](https://www.anchorterminal.com/compare/azure-text-to-speech-vs-fish-audio-tts.md)\n- [Azure AI Speech text-to-speech vs Resemble AI Text-to-Speech API](https://www.anchorterminal.com/compare/azure-text-to-speech-vs-resemble-ai-tts.md)\n- [Cartesia Sonic TTS API + MCP vs Fish Audio TTS API](https://www.anchorterminal.com/compare/cartesia-tts-vs-fish-audio-tts.md)\n- [Cartesia Sonic TTS API + MCP vs Resemble AI Text-to-Speech API](https://www.anchorterminal.com/compare/cartesia-tts-vs-resemble-ai-tts.md)\n- [Deepgram Text-to-Speech (Aura-2, Flux TTS) vs Fish Audio TTS API](https://www.anchorterminal.com/compare/deepgram-tts-vs-fish-audio-tts.md)\n- [Deepgram Text-to-Speech (Aura-2, Flux TTS) vs Resemble AI Text-to-Speech API](https://www.anchorterminal.com/compare/deepgram-tts-vs-resemble-ai-tts.md)\n- [ElevenLabs Text to Speech API + MCP vs Fish Audio TTS API](https://www.anchorterminal.com/compare/elevenlabs-tts-vs-fish-audio-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- [Fish Audio TTS API vs Murf TTS API + MCP](https://www.anchorterminal.com/compare/fish-audio-tts-vs-murf-tts.md)\n- [Fish Audio TTS API vs PlayHT Text-to-Speech API](https://www.anchorterminal.com/compare/fish-audio-tts-vs-playht-tts.md)\n- [Fish Audio TTS API vs Rime TTS API + MCP](https://www.anchorterminal.com/compare/fish-audio-tts-vs-rime-tts.md)\n- [Fish Audio TTS API vs Soniox Text-to-Speech](https://www.anchorterminal.com/compare/fish-audio-tts-vs-soniox-tts.md)\n- [Murf TTS API + MCP vs Resemble AI Text-to-Speech API](https://www.anchorterminal.com/compare/murf-tts-vs-resemble-ai-tts.md)\n- [PlayHT Text-to-Speech API vs Resemble AI Text-to-Speech API](https://www.anchorterminal.com/compare/playht-tts-vs-resemble-ai-tts.md)\n- [Resemble AI Text-to-Speech API vs Rime TTS API + MCP](https://www.anchorterminal.com/compare/resemble-ai-tts-vs-rime-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",
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        "name": "Fish Audio TTS API vs Resemble AI Text-to-Speech API",
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    "description": "Fish Audio TTS API scores 60.7 (C) on agent readiness against Resemble AI Text-to-Speech API's 50.3 (D), and leads in 4 of 7 scored categories. Resemble AI Text-to-Speech API leads on security \u0026 auth and transparency \u0026 trust. Both do speech tts. Category scores, facts, verdicts…",
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