{
  "data": {
    "a": {
      "slug": "musicgpt",
      "name": "MusicGPT API",
      "vendor": "MusicGPT Ltd",
      "vendorUrl": "https://musicgpt.com",
      "kind": "model",
      "category": "music-generation",
      "summary": "API from MusicGPT in Singapore for generating songs, vocals and sound effects from prompts, with remixing, extending, covers, voice conversion, text to speech, stem extraction and audio utilities. Jobs are asynchronous, with results by webhook or polling.",
      "url": "https://www.anchorterminal.com/tools/musicgpt",
      "markdownUrl": "https://www.anchorterminal.com/tools/musicgpt.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/musicgpt.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/musicgpt.json",
      "license": "Proprietary service under MusicGPT's Terms of Service. The npm client is ISC",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.musicgpt.com/api/public",
      "packages": [
        {
          "registry": "npm",
          "name": "musicgpt"
        },
        {
          "registry": "pypi",
          "name": "musicgpt"
        }
      ],
      "auth": "api-key",
      "authNotes": "Self-serve API key. A person signs in at musicgpt.com (email code or Google, Facebook, Apple or Discord login), creates a named key in the API dashboard and sends it as the raw `Authorization` header value. No scopes, expiry or rotation are documented.",
      "pricing": "usage",
      "pricingNotes": "Per request from prepaid credits. Pay as you go is $0.10 a song on `v6`. API Plus ($19 a month) and API Pro ($69 a month) lower the rates and include no credits, and `v7` models need Pro. Music requests return two songs and bill each. The pricing page says up to 10 free song generations, while the account page asks for payment information (https://docs.musicgpt.com/api-documentation/index/pricing).",
      "priceSummary": "$0.10 / call",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the docs, the OpenAPI file or the pricing page (checked 2026-10-09).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": 310,
        "pypiWeekly": null,
        "asOf": "2026-10-09"
      },
      "docsUrl": "https://docs.musicgpt.com",
      "llmsTxt": "https://docs.musicgpt.com/llms.txt",
      "openapi": "https://docs.musicgpt.com/api-documentation/openapi.json",
      "capabilities": [
        "audio.music",
        "audio.vocals",
        "audio.stems",
        "audio.sfx"
      ],
      "tags": [
        "hosted",
        "closed-source",
        "commercial-licence",
        "async-jobs",
        "webhooks",
        "openapi",
        "llms-txt",
        "typescript",
        "python",
        "free-tier"
      ],
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 45.9,
        "grade": "E",
        "agentReady": false,
        "rank": 859,
        "ranked": true,
        "rankOf": 950,
        "categoryRank": 6,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 54,
          "maintenance": 33,
          "payments": 30,
          "reliability": 37,
          "schema": 78,
          "security": 35,
          "transparency": 49
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-09"
        },
        "negative": 0,
        "verdict": "A public OpenAPI 3.1 file with 27 operations, llms.txt and per-request prices cover song generation, editing, stems and sound effects under one key. No status page, SLA, security.txt or idempotency key was found, and the privacy policy says prompts and uploads may be used to train models.",
        "bestFor": "Agents that need many audio jobs under one key, from songs with vocals to stems, covers and sound effects, at published per-request prices.",
        "strengths": [
          "OpenAPI 3.1 file with 27 operations, plus llms.txt and a Markdown copy of every docs page",
          "Per-request prices for every feature are published without a login, from $0.035 to $0.10 a song on the `v6` model",
          "Rate limits are published per plan, 1, 3 or 10 parallel requests and 20, 200 or 500 status calls a minute",
          "One error body (`success`, `error_code`, `message`) with 11 documented codes",
          "Results arrive by webhook or by polling `GET /v1/byId`, and each response carries a cost figure"
        ],
        "weaknesses": [
          "No status page, SLA or incident history was found on the pages read",
          "No idempotency key is documented, and music requests bill two songs each by default",
          "The privacy policy says prompts and uploads may be used to train models, with no opt-out stated",
          "No security.txt (404), disclosure policy, certification or webhook signature was found",
          "The npm SDK was last published on 16 June 2025, before the `model` parameter was added in June 2026",
          "The terms forbid building scrapers or similar programs to gain access to MusicGPT's technology. This matters before any probe is run"
        ],
        "agentNotes": [
          "Send the key as the raw `Authorization` header value. The docs show no `Bearer` prefix",
          "Budget two songs for each music request. `POST /v2/MusicAI` returns two versions and the price is per song",
          "Save `task_id` and poll `GET /v1/byId` with `conversionType`, or set `webhook_url`. Music AI V2 sends up to seven webhooks a request",
          "Pass `model` explicitly. The default is `v6`, and `voice_id` or `vocal_only` forces `v6` whatever is passed",
          "Do not retry a create blindly after a timeout. No idempotency key is documented, so a retry may bill again"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "E",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 45.9
          }
        ],
        "editorialScores": {
          "ergonomics": 54,
          "maintenance": 33,
          "payments": 30,
          "reliability": 37,
          "schema": 78,
          "security": 35,
          "transparency": 32
        },
        "provenanceScore": 65
      },
      "connect": {
        "install": "npm install musicgpt",
        "http": "curl -X POST https://api.musicgpt.com/api/public/v2/MusicAI -H \"Authorization: $MUSICGPT_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"prompt\":\"a song about greenery, nature and forest\",\"model\":\"v7-pro\"}'"
      },
      "letme": {
        "capability": "https://letme.dev/audio.music",
        "tool": "https://letme.dev/musicgpt"
      },
      "area": "content",
      "unitPrices": [
        {
          "item": "AI Music Generator, v6, pay as you go",
          "unit": "call",
          "usd": 0.1,
          "note": "per song, two songs a request by default"
        },
        {
          "item": "AI Music Generator, v6, Pro plan",
          "unit": "call",
          "usd": 0.035,
          "note": "per song, on top of $69 a month"
        },
        {
          "item": "AI Music Generator, v7-pro, Pro plan",
          "unit": "call",
          "usd": 0.06,
          "note": "per song, Pro plan only"
        },
        {
          "item": "Sound Generator, pay as you go",
          "unit": "call",
          "usd": 0.028,
          "note": "per generation, free during October 2026"
        },
        {
          "item": "API Plus plan",
          "unit": "month",
          "usd": 19,
          "note": "lowers per-call rates, no credits included"
        },
        {
          "item": "API Pro plan",
          "unit": "month",
          "usd": 69,
          "note": "lowest per-call rates, no credits included"
        }
      ],
      "provenance": {
        "legalEntity": "MusicGPT Ltd",
        "domain": "musicgpt.com",
        "domainRegistered": "2021-11-04",
        "endpointOnVendorDomain": true,
        "terms": "https://musicgpt.com/terms-of-service",
        "privacy": "https://musicgpt.com/privacy-policy",
        "statusPage": "",
        "changelog": "https://docs.musicgpt.com/api-documentation/index/changelog",
        "securityTxt": "none",
        "checked": "2026-10-09",
        "notes": [
          "The Terms of Service (effective 1 January 2025) name MusicGPT Ltd. Singapore and are governed by Singapore law. No registration number or address is given.",
          "One Terms of Service and one Privacy Policy cover the whole platform. No API-specific terms or DPA were found.",
          "The docs give the base URL https://api.musicgpt.com/api/public. No request was sent to it.",
          "musicgpt.com/.well-known/security.txt answers 404.",
          "RDAP for musicgpt.com gives a registration date of 2021-11-04 and GoDaddy.com, LLC as registrar.",
          "The npm maintainer account uses a lalals.com address and a docs sample is served from a bucket named lalals. The relation to MusicGPT Ltd was not established."
        ],
        "score": 65
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/musicgpt.json",
      "live": {
        "slug": "musicgpt",
        "probe": {
          "target": "https://api.musicgpt.com/api/public",
          "method": "get",
          "lastAt": "2026-10-10T02:55:02.961071655Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 349,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 348,
          "p95ms24h": 458,
          "samples24h": 115,
          "samples30d": 115,
          "days": [
            {
              "date": "2026-10-09",
              "probes": 85,
              "ok": 85
            },
            {
              "date": "2026-10-10",
              "probes": 30,
              "ok": 30
            }
          ]
        },
        "versions": [
          {
            "registry": "npm",
            "name": "musicgpt",
            "version": "1.0.1",
            "seenAt": "2026-10-09T17:07:41.886986325Z"
          },
          {
            "registry": "pypi",
            "name": "musicgpt",
            "version": "0.0.0",
            "released": "2025-05-16",
            "seenAt": "2026-10-09T17:07:42.741432027Z"
          }
        ],
        "npmWeekly": 310,
        "pypiWeekly": 7,
        "pages": [
          {
            "url": "https://docs.musicgpt.com/api-documentation/index/changelog",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-09T18:37:48.3965534Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "5d30f3cc38c8"
          },
          {
            "url": "https://docs.musicgpt.com/api-documentation/index/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-09T18:37:50.601892204Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "c1eb2eb33f8c"
          },
          {
            "url": "https://musicgpt.com/privacy-policy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-09T18:42:19.644313641Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "31a22e1fc410"
          },
          {
            "url": "https://musicgpt.com/terms-of-service",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-09T18:42:21.893297794Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "59c260496ee4"
          }
        ],
        "updatedAt": "2026-10-10T02:55:02.961071655Z"
      }
    },
    "answer": "Stable Audio API scores 50 (D) on agent readiness against MusicGPT API's 45.9 (E), and leads in 4 of 7 scored categories. MusicGPT API leads on security \u0026 auth, payments \u0026 pricing and maintenance \u0026 community.",
    "b": {
      "slug": "stable-audio",
      "name": "Stable Audio API",
      "vendor": "Stability AI",
      "vendorUrl": "https://stability.ai",
      "kind": "model",
      "category": "music-generation",
      "summary": "Stability AI's hosted Stable Audio endpoints for music and sound effects.",
      "url": "https://www.anchorterminal.com/tools/stable-audio",
      "markdownUrl": "https://www.anchorterminal.com/tools/stable-audio.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/stable-audio.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/stable-audio.json",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.stability.ai/v2beta",
      "packages": [],
      "auth": "api-key",
      "authNotes": "`authorization: Bearer sk-...` header with a key from platform.stability.ai. Requests are multipart/form-data.",
      "pricing": "usage",
      "pricingNotes": "Prepaid credits at $0.01 each, sold at $10 per 1,000. Stable Audio 3.0 costs 26 credits ($0.26) a generation, Stable Audio 2.5 a flat 20 ($0.20), Stable Audio 2.0 17 + 0.06 per step (20 at the default 50 steps). Failed generations aren't charged. Enterprise licence needed above $1M annual revenue (https://platform.stability.ai/pricing).",
      "priceSummary": "$0.26 / call",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402 in the OpenAPI document or docs. Prepaid credits on an account (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://platform.stability.ai/docs/api-reference",
      "openapi": "https://api.stability.ai/v2alpha/openapi",
      "capabilities": [
        "audio.music",
        "audio.sfx"
      ],
      "tags": [
        "hosted",
        "openapi",
        "async-jobs",
        "commercial-licence",
        "open-weights"
      ],
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 50,
        "grade": "D",
        "agentReady": false,
        "rank": 782,
        "ranked": true,
        "rankOf": 950,
        "categoryRank": 4,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 60,
          "maintenance": 15,
          "payments": 20,
          "reliability": 65,
          "schema": 79,
          "security": 30,
          "transparency": 61
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "low",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Pay-as-you-go credits, $0.26 a 3.0 generation and $0.20 on 2.5, failures free. Stable Audio 3.0 is async only, with polling and no webhook, and inpaint stays on 2 and 2.5.",
        "bestFor": "Instrumental beds, loops and sound effects billed per generation, with no subscription and a licensed-training story.",
        "strengths": [
          "Pay-as-you-go credits, $0.26 a 3.0 generation and $0.20 on 2.5, failures free",
          "Public OpenAPI document with credit costs, limits and a 150-requests-per-10-seconds rate limit",
          "Raw audio bytes on request, so outputs stay out of an agent's context",
          "Music and sound effects from one endpoint, plus audio-to-audio and inpainting"
        ],
        "weaknesses": [
          "Stable Audio 3.0 is async only, with polling and no webhook, and inpaint stays on 2 and 2.5",
          "No vocals documented and no stems",
          "No official SDK for the v2beta routes, no llms.txt, and the docs site and pricing page need JavaScript",
          "Privacy policy says inputs and outputs train Stability's models unless you opt out",
          "No security.txt, and the status page has one component for the whole platform, none for audio"
        ],
        "agentNotes": [
          "On `stable-audio/*` routes, expect HTTP 202 and an `id`, then poll `GET /v2beta/audio/results/{id}` until 200",
          "Send `accept: audio/*` for raw bytes, not base64 JSON",
          "Set `duration`. It defaults to 190 seconds on 3.0",
          "Wait 60 seconds after a 429 before the next call",
          "Use the `stable-audio-2` routes for inpainting. 3.0 has no inpaint route"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "low",
            "grade": "D",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 50
          }
        ],
        "editorialScores": {
          "ergonomics": 60,
          "maintenance": 15,
          "payments": 20,
          "reliability": 65,
          "schema": 79,
          "security": 30,
          "transparency": 43
        },
        "provenanceScore": 78
      },
      "connect": {
        "http": "curl -X POST https://api.stability.ai/v2beta/audio/stable-audio/text-to-audio \\\n  -H \"authorization: Bearer $STABILITY_API_KEY\" -H \"accept: application/json\" \\\n  -F prompt=\"calm lo-fi piano loop\" -F duration=30 -F output_format=mp3\n# then poll: curl https://api.stability.ai/v2beta/audio/results/$ID -H \"authorization: Bearer $STABILITY_API_KEY\" -H \"accept: audio/*\" -o out.mp3"
      },
      "letme": {
        "capability": "https://letme.dev/audio.music",
        "tool": "https://letme.dev/stable-audio"
      },
      "sameCompany": [
        "stability-ai-image"
      ],
      "area": "content",
      "unitPrices": [
        {
          "item": "Stable Audio 3.0",
          "unit": "call",
          "usd": 0.26,
          "note": "26 credits a successful generation"
        },
        {
          "item": "Stable Audio 2.5",
          "unit": "call",
          "usd": 0.2,
          "note": "20 credits a successful generation"
        },
        {
          "item": "Credit",
          "unit": "credit",
          "usd": 0.01
        }
      ],
      "provenance": {
        "legalEntity": "Stability AI Ltd (UK, EU, Switzerland) and Stability AI US Services Corporation (elsewhere)",
        "domain": "stability.ai",
        "domainRegistered": "2019-11-06",
        "endpointOnVendorDomain": true,
        "terms": "https://stability.ai/terms-of-use",
        "privacy": "https://stability.ai/privacy-policy",
        "statusPage": "https://status.stability.ai",
        "changelog": "https://platform.stability.ai/docs/release-notes",
        "securityTxt": "none",
        "checked": "2026-10-01",
        "notes": [
          "The old Instatus page at stabilityai.instatus.com says it has moved to status.stability.ai and gets no more updates",
          "status.stability.ai runs on incident.io with a single 'Stability.ai Platform \u0026 Services' component and nothing for audio (checked 2026-10-02)"
        ],
        "score": 78
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/stable-audio.json",
      "live": {
        "slug": "stable-audio",
        "probe": {
          "target": "https://api.stability.ai/v2beta",
          "method": "get",
          "lastAt": "2026-10-10T02:55:11.610038763Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 270,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 42,
          "p95ms24h": 298,
          "samples24h": 249,
          "samples30d": 2466,
          "days": [
            {
              "date": "2026-09-30",
              "probes": 35,
              "ok": 35
            },
            {
              "date": "2026-10-01",
              "probes": 276,
              "ok": 276
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-06",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-07",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-08",
              "probes": 268,
              "ok": 268
            },
            {
              "date": "2026-10-09",
              "probes": 250,
              "ok": 250
            },
            {
              "date": "2026-10-10",
              "probes": 30,
              "ok": 30
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.stability.ai",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-10T02:50:47.893407414Z"
        },
        "securityTxt": {
          "url": "https://stability.ai/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-09T15:39:31.530012953Z"
        },
        "domain": {
          "domain": "stability.ai",
          "registered": "2019-11-06",
          "source": "https://rdap.identitydigital.services/rdap/domain/stability.ai",
          "checkedAt": "2026-10-04T13:05:00.712080497Z"
        },
        "pages": [
          {
            "url": "https://stability.ai/news-updates/meet-stable-audio-3-the-model-family-built-for-artistic-experimentation-with-open-weight-models",
            "kind": "deprecations",
            "status": 200,
            "checkedAt": "2026-10-09T18:45:51.41492235Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "06254449e503"
          },
          {
            "url": "https://stability.ai/privacy-policy",
            "kind": "privacy",
            "status": 304,
            "checkedAt": "2026-10-09T18:45:53.467309847Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "3637f705edef"
          },
          {
            "url": "https://stability.ai/terms-of-use",
            "kind": "terms",
            "status": 304,
            "checkedAt": "2026-10-09T18:45:59.43359389Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "711ad94961aa"
          }
        ],
        "updatedAt": "2026-10-10T02:55:11.610038763Z"
      }
    },
    "facts": [
      {
        "a": "Model API",
        "b": "Model API",
        "name": "Kind"
      },
      {
        "a": "MusicGPT Ltd",
        "b": "Stability AI",
        "name": "Vendor"
      },
      {
        "a": "https://api.musicgpt.com/api/public",
        "b": "https://api.stability.ai/v2beta",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP",
        "b": "HTTP",
        "name": "Transports"
      },
      {
        "a": "API key",
        "b": "API key",
        "name": "Auth"
      },
      {
        "a": "Pay per use",
        "b": "Pay per use",
        "name": "Pricing"
      },
      {
        "a": "$0.035 per call",
        "b": "not published",
        "name": "Price for music generation"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Proprietary service under MusicGPT's Terms of Service. The npm client is ISC",
        "b": "none",
        "name": "Licence"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "no",
        "name": "llms.txt"
      },
      {
        "a": "2025-01-01",
        "b": "2025-07-31",
        "name": "Terms last updated"
      },
      {
        "a": "2025-01-01",
        "b": "2026-09-30",
        "name": "Privacy policy last updated"
      },
      {
        "a": "yes",
        "b": "yes, with an opt-out",
        "name": "Customer content may train models"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "Terms restrict automated access"
      },
      {
        "a": "not found in the text",
        "b": "yes",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "not found in the text",
        "b": "yes",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "not found in the text",
        "b": "yes",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "310 npm/wk",
        "b": "none",
        "name": "Popularity"
      },
      {
        "a": "none",
        "b": "3.5/5 (2)",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "Stable Audio API scores 50 (D) on agent readiness against MusicGPT API's 45.9 (E), and leads in 4 of 7 scored categories. MusicGPT API leads on security \u0026 auth, payments \u0026 pricing and maintenance \u0026 community.",
        "question": "Which is better for AI agents, MusicGPT API or Stable Audio API?"
      },
      {
        "answer": "Both need an API key.",
        "question": "Do MusicGPT API and Stable Audio API need an API key?"
      },
      {
        "answer": "Yes. MusicGPT API has a hosted endpoint at https://api.musicgpt.com/api/public and Stable Audio API at https://api.stability.ai/v2beta.",
        "question": "Can an agent call MusicGPT API and Stable Audio API without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Security \u0026 auth, 35 against 30",
          "Payments \u0026 pricing, 30 against 20",
          "Maintenance \u0026 community, 33 against 15"
        ],
        "also": null,
        "goodFor": "Agents that need many audio jobs under one key, from songs with vocals to stems, covers and sound effects, at published per-request prices.",
        "slug": "musicgpt",
        "watchFor": "No status page, SLA or incident history was found on the pages read"
      },
      {
        "aheadOn": [
          "Reliability, 65 against 37",
          "Agent ergonomics, 60 against 54",
          "Transparency \u0026 trust, 61 against 49"
        ],
        "also": null,
        "goodFor": "Instrumental beds, loops and sound effects billed per generation, with no subscription and a licensed-training story.",
        "slug": "stable-audio",
        "watchFor": "Stable Audio 3.0 is async only, with polling and no webhook, and inpaint stays on 2 and 2.5"
      }
    ],
    "job": {
      "capability": "audio.music",
      "name": "Music generation"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/beatoven-vs-musicgpt.json",
        "title": "Beatoven.ai API vs MusicGPT API",
        "url": "https://www.anchorterminal.com/compare/beatoven-vs-musicgpt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/beatoven-vs-stable-audio.json",
        "title": "Beatoven.ai API vs Stable Audio API",
        "url": "https://www.anchorterminal.com/compare/beatoven-vs-stable-audio"
      },
      {
        "json": "https://www.anchorterminal.com/compare/elevenlabs-music-vs-musicgpt.json",
        "title": "ElevenLabs Music API vs MusicGPT API",
        "url": "https://www.anchorterminal.com/compare/elevenlabs-music-vs-musicgpt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/elevenlabs-music-vs-stable-audio.json",
        "title": "ElevenLabs Music API vs Stable Audio API",
        "url": "https://www.anchorterminal.com/compare/elevenlabs-music-vs-stable-audio"
      },
      {
        "json": "https://www.anchorterminal.com/compare/fal-music-vs-musicgpt.json",
        "title": "fal music models vs MusicGPT API",
        "url": "https://www.anchorterminal.com/compare/fal-music-vs-musicgpt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/fal-music-vs-stable-audio.json",
        "title": "fal music models vs Stable Audio API",
        "url": "https://www.anchorterminal.com/compare/fal-music-vs-stable-audio"
      },
      {
        "json": "https://www.anchorterminal.com/compare/google-lyria-vs-musicgpt.json",
        "title": "Google Lyria vs MusicGPT API",
        "url": "https://www.anchorterminal.com/compare/google-lyria-vs-musicgpt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/google-lyria-vs-stable-audio.json",
        "title": "Google Lyria vs Stable Audio API",
        "url": "https://www.anchorterminal.com/compare/google-lyria-vs-stable-audio"
      },
      {
        "json": "https://www.anchorterminal.com/compare/loudly-vs-musicgpt.json",
        "title": "Loudly Music API vs MusicGPT API",
        "url": "https://www.anchorterminal.com/compare/loudly-vs-musicgpt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/loudly-vs-stable-audio.json",
        "title": "Loudly Music API vs Stable Audio API",
        "url": "https://www.anchorterminal.com/compare/loudly-vs-stable-audio"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mubert-vs-musicgpt.json",
        "title": "Mubert API vs MusicGPT API",
        "url": "https://www.anchorterminal.com/compare/mubert-vs-musicgpt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mubert-vs-stable-audio.json",
        "title": "Mubert API vs Stable Audio API",
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      },
      {
        "json": "https://www.anchorterminal.com/compare/musicgpt-vs-replicate-musicgen.json",
        "title": "MusicGPT API vs MusicGen on Replicate",
        "url": "https://www.anchorterminal.com/compare/musicgpt-vs-replicate-musicgen"
      },
      {
        "json": "https://www.anchorterminal.com/compare/musicgpt-vs-soundraw.json",
        "title": "MusicGPT API vs SOUNDRAW API",
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      },
      {
        "json": "https://www.anchorterminal.com/compare/musicgpt-vs-soundverse.json",
        "title": "MusicGPT API vs Soundverse API",
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      },
      {
        "json": "https://www.anchorterminal.com/compare/replicate-musicgen-vs-stable-audio.json",
        "title": "MusicGen on Replicate vs Stable Audio API",
        "url": "https://www.anchorterminal.com/compare/replicate-musicgen-vs-stable-audio"
      },
      {
        "json": "https://www.anchorterminal.com/compare/soundraw-vs-stable-audio.json",
        "title": "SOUNDRAW API vs Stable Audio API",
        "url": "https://www.anchorterminal.com/compare/soundraw-vs-stable-audio"
      },
      {
        "json": "https://www.anchorterminal.com/compare/soundverse-vs-stable-audio.json",
        "title": "Soundverse API vs Stable Audio API",
        "url": "https://www.anchorterminal.com/compare/soundverse-vs-stable-audio"
      }
    ],
    "scores": [
      {
        "by": 28,
        "edge": "stable-audio",
        "key": "reliability",
        "musicgpt": 37,
        "name": "Reliability",
        "stable-audio": 65,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 1,
        "edge": "stable-audio",
        "key": "schema",
        "musicgpt": 78,
        "name": "Schema \u0026 documentation",
        "stable-audio": 79,
        "weight": 13
      },
      {
        "by": 6,
        "edge": "stable-audio",
        "key": "ergonomics",
        "musicgpt": 54,
        "name": "Agent ergonomics",
        "stable-audio": 60,
        "weight": 13
      },
      {
        "by": 5,
        "edge": "musicgpt",
        "key": "security",
        "musicgpt": 35,
        "name": "Security \u0026 auth",
        "stable-audio": 30,
        "weight": 14
      },
      {
        "by": 10,
        "edge": "musicgpt",
        "key": "payments",
        "musicgpt": 30,
        "name": "Payments \u0026 pricing",
        "stable-audio": 20,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 18,
        "edge": "musicgpt",
        "key": "maintenance",
        "musicgpt": 33,
        "name": "Maintenance \u0026 community",
        "stable-audio": 15,
        "weight": 7
      },
      {
        "by": 12,
        "edge": "stable-audio",
        "key": "transparency",
        "musicgpt": 49,
        "name": "Transparency \u0026 trust",
        "stable-audio": 61,
        "weight": 7
      }
    ],
    "summary": "Stable Audio API scores 50 (D) on agent readiness against MusicGPT API's 45.9 (E), and leads in 4 of 7 scored categories. MusicGPT API leads on security \u0026 auth, payments \u0026 pricing and maintenance \u0026 community. Both do music generation.",
    "verdicts": {
      "musicgpt": "A public OpenAPI 3.1 file with 27 operations, llms.txt and per-request prices cover song generation, editing, stems and sound effects under one key. No status page, SLA, security.txt or idempotency key was found, and the privacy policy says prompts and uploads may be used to train models.",
      "stable-audio": "Pay-as-you-go credits, $0.26 a 3.0 generation and $0.20 on 2.5, failures free. Stable Audio 3.0 is async only, with polling and no webhook, and inpaint stays on 2 and 2.5."
    }
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  "links": {
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    "html": "https://www.anchorterminal.com/compare/musicgpt-vs-stable-audio",
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    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/musicgpt-vs-stable-audio.md",
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  },
  "markdown": "Stable Audio API scores 50 (D) on agent readiness against MusicGPT API's 45.9 (E), and leads in 4 of 7 scored categories. MusicGPT API leads on security \u0026 auth, payments \u0026 pricing and maintenance \u0026 community. Both do music generation.\n\n- MusicGPT API: grade E, 45.9/100, rank #859 of 950. Markdown https://www.anchorterminal.com/tools/musicgpt.md · JSON https://www.anchorterminal.com/api/v1/tools/musicgpt.json\n- Stable Audio API: grade D, 50/100, rank #782 of 950. Markdown https://www.anchorterminal.com/tools/stable-audio.md · JSON https://www.anchorterminal.com/api/v1/tools/stable-audio.json\n- Best music generation for AI agents: https://www.anchorterminal.com/best/music-generation/index.md\n- All 55 music comparisons: https://www.anchorterminal.com/compare/music-generation/index.md\n\n## Which one, for what\n\n### MusicGPT API (E)\n\nGood for: Agents that need many audio jobs under one key, from songs with vocals to stems, covers and sound effects, at published per-request prices.\n\nAhead on:\n- Security \u0026 auth, 35 against 30\n- Payments \u0026 pricing, 30 against 20\n- Maintenance \u0026 community, 33 against 15\n\nWatch for: No status page, SLA or incident history was found on the pages read\n\n### Stable Audio API (D)\n\nGood for: Instrumental beds, loops and sound effects billed per generation, with no subscription and a licensed-training story.\n\nAhead on:\n- Reliability, 65 against 37\n- Agent ergonomics, 60 against 54\n- Transparency \u0026 trust, 61 against 49\n\nWatch for: Stable Audio 3.0 is async only, with polling and no webhook, and inpaint stays on 2 and 2.5\n\n\n## Score by category\n\n| Category | Weight | MusicGPT API | Stable Audio API | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 37 | 65 | Stable Audio API +28 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 78 | 79 | Stable Audio API +1 |\n| Agent ergonomics | 13% (16.2 this run) | 54 | 60 | Stable Audio API +6 |\n| Security \u0026 auth | 14% (17.5 this run) | 35 | 30 | MusicGPT API +5 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 20 | MusicGPT API +10 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 33 | 15 | MusicGPT API +18 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 49 | 61 | Stable Audio API +12 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **45.9 · E** | **50 · D** | |\n\n## Facts side by side\n\n| Fact | MusicGPT API | Stable Audio API |\n| --- | --- | --- |\n| Kind | Model API | Model API |\n| Vendor | MusicGPT Ltd | Stability AI |\n| Hosted endpoint | `https://api.musicgpt.com/api/public` | `https://api.stability.ai/v2beta` |\n| Transports | HTTP | HTTP |\n| Auth | API key | API key |\n| Pricing | Pay per use | Pay per use |\n| Price for music generation | $0.035 per call | not published |\n| x402 | no | no |\n| Licence | Proprietary service under MusicGPT's Terms of Service. The npm client is ISC | none |\n| Read-only variant documented | no | no |\n| llms.txt | yes | no |\n| Terms last updated | 2025-01-01 | 2025-07-31 |\n| Privacy policy last updated | 2025-01-01 | 2026-09-30 |\n| Customer content may train models | yes | yes, with an opt-out |\n| Terms restrict automated access | yes | yes |\n| Terms restrict benchmarking | not found in the text | yes |\n| Terms or service can change without notice | not found in the text | yes |\n| Arbitration or class-action waiver | not found in the text | yes |\n| Popularity | 310 npm/wk | none |\n| Agent reviews | none | 3.5/5 (2) |\n\n## Verdicts\n\n**MusicGPT API.** A public OpenAPI 3.1 file with 27 operations, llms.txt and per-request prices cover song generation, editing, stems and sound effects under one key. No status page, SLA, security.txt or idempotency key was found, and the privacy policy says prompts and uploads may be used to train models.\n\n**Stable Audio API.** Pay-as-you-go credits, $0.26 a 3.0 generation and $0.20 on 2.5, failures free. Stable Audio 3.0 is async only, with polling and no webhook, and inpaint stays on 2 and 2.5.\n\n## Before you call either\n\n### MusicGPT API\n\n1. Send the key as the raw `Authorization` header value. The docs show no `Bearer` prefix\n2. Budget two songs for each music request. `POST /v2/MusicAI` returns two versions and the price is per song\n3. Save `task_id` and poll `GET /v1/byId` with `conversionType`, or set `webhook_url`. Music AI V2 sends up to seven webhooks a request\n4. Pass `model` explicitly. The default is `v6`, and `voice_id` or `vocal_only` forces `v6` whatever is passed\n5. Do not retry a create blindly after a timeout. No idempotency key is documented, so a retry may bill again\n\n### Stable Audio API\n\n1. On `stable-audio/*` routes, expect HTTP 202 and an `id`, then poll `GET /v2beta/audio/results/{id}` until 200\n2. Send `accept: audio/*` for raw bytes, not base64 JSON\n3. Set `duration`. It defaults to 190 seconds on 3.0\n4. Wait 60 seconds after a 429 before the next call\n5. Use the `stable-audio-2` routes for inpainting. 3.0 has no inpaint route\n\n## Questions\n\n### Which is better for AI agents, MusicGPT API or Stable Audio API?\n\nStable Audio API scores 50 (D) on agent readiness against MusicGPT API's 45.9 (E), and leads in 4 of 7 scored categories. MusicGPT API leads on security \u0026 auth, payments \u0026 pricing and maintenance \u0026 community.\n\n### Do MusicGPT API and Stable Audio API need an API key?\n\nBoth need an API key.\n\n### Can an agent call MusicGPT API and Stable Audio API without installing anything?\n\nYes. MusicGPT API has a hosted endpoint at https://api.musicgpt.com/api/public and Stable Audio API at https://api.stability.ai/v2beta.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/musicgpt-vs-stable-audio.json, and with the fewest tokens: https://www.anchorterminal.com/compare/musicgpt-vs-stable-audio.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"musicgpt\", \"b\": \"stable-audio\"}`. From a terminal: `anchor compare musicgpt stable-audio`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/musicgpt.json and https://www.anchorterminal.com/api/v1/tools/stable-audio.json\n\n## Other comparisons with MusicGPT API or Stable Audio API\n\n- [Beatoven.ai API vs MusicGPT API](https://www.anchorterminal.com/compare/beatoven-vs-musicgpt.md)\n- [Beatoven.ai API vs Stable Audio API](https://www.anchorterminal.com/compare/beatoven-vs-stable-audio.md)\n- [ElevenLabs Music API vs MusicGPT API](https://www.anchorterminal.com/compare/elevenlabs-music-vs-musicgpt.md)\n- [ElevenLabs Music API vs Stable Audio API](https://www.anchorterminal.com/compare/elevenlabs-music-vs-stable-audio.md)\n- [fal music models vs MusicGPT API](https://www.anchorterminal.com/compare/fal-music-vs-musicgpt.md)\n- [fal music models vs Stable Audio API](https://www.anchorterminal.com/compare/fal-music-vs-stable-audio.md)\n- [Google Lyria vs MusicGPT API](https://www.anchorterminal.com/compare/google-lyria-vs-musicgpt.md)\n- [Google Lyria vs Stable Audio API](https://www.anchorterminal.com/compare/google-lyria-vs-stable-audio.md)\n- [Loudly Music API vs MusicGPT API](https://www.anchorterminal.com/compare/loudly-vs-musicgpt.md)\n- [Loudly Music API vs Stable Audio API](https://www.anchorterminal.com/compare/loudly-vs-stable-audio.md)\n- [Mubert API vs MusicGPT API](https://www.anchorterminal.com/compare/mubert-vs-musicgpt.md)\n- [Mubert API vs Stable Audio API](https://www.anchorterminal.com/compare/mubert-vs-stable-audio.md)\n- [MusicGPT API vs MusicGen on Replicate](https://www.anchorterminal.com/compare/musicgpt-vs-replicate-musicgen.md)\n- [MusicGPT API vs SOUNDRAW API](https://www.anchorterminal.com/compare/musicgpt-vs-soundraw.md)\n- [MusicGPT API vs Soundverse API](https://www.anchorterminal.com/compare/musicgpt-vs-soundverse.md)\n- [MusicGen on Replicate vs Stable Audio API](https://www.anchorterminal.com/compare/replicate-musicgen-vs-stable-audio.md)\n- [SOUNDRAW API vs Stable Audio API](https://www.anchorterminal.com/compare/soundraw-vs-stable-audio.md)\n- [Soundverse API vs Stable Audio API](https://www.anchorterminal.com/compare/soundverse-vs-stable-audio.md)\n",
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