# Soundverse API vs Stable Audio API > Stable Audio API has a score of 50.3 (D) against Soundverse API's 42.2 (E). Both do audio music. The largest gap is reliability, 38 points. Category scores, facts, verdicts and agent notes side by side. - Canonical: https://www.anchorterminal.com/compare/soundverse-vs-stable-audio - Markdown: https://www.anchorterminal.com/compare/soundverse-vs-stable-audio.md (~1,550 tokens) - Slim: https://www.anchorterminal.com/compare/soundverse-vs-stable-audio.min.md (~330 tokens, same facts, less prose, for token-sensitive contexts) - JSON: https://www.anchorterminal.com/compare/soundverse-vs-stable-audio.json (this page as data, same URL with Accept: application/json) - Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt) - API: https://www.anchorterminal.com/api/v1/index.json - Updated: 2026-10-05 Stable Audio API has a score of 50.3 (D) against Soundverse API's 42.2 (E). Both do audio music. The largest gap is reliability, 38 points. - Soundverse API: grade E, 42.2/100, rank #415 of 452. Markdown https://www.anchorterminal.com/tools/soundverse.md · JSON https://www.anchorterminal.com/api/v1/tools/soundverse.json - Stable Audio API: grade D, 50.3/100, rank #362 of 452. Markdown https://www.anchorterminal.com/tools/stable-audio.md · JSON https://www.anchorterminal.com/api/v1/tools/stable-audio.json ## Which one, for what Pick Soundverse API for agent ergonomics (+12), security & auth (+5). Pick Stable Audio API for reliability (+38), maintenance & community (+12), transparency & trust (+19). ## Score by category | Category | Weight | Soundverse API | Stable Audio API | Edge | | --- | --- | --- | --- | --- | | Reliability | 16% (20 this run) | 27 | 65 | Stable Audio API +38 | | Performance | 10%, pending | pending | pending | not scored in this run | | Schema & documentation | 13% (16.2 this run) | 75 | 79 | Stable Audio API +4 | | Agent ergonomics | 13% (16.2 this run) | 72 | 60 | Soundverse API +12 | | Security & auth | 14% (17.5 this run) | 35 | 30 | Soundverse API +5 | | Payments & pricing | 10% (12.5 this run) | 20 | 20 | even | | Task success | 10%, pending | pending | pending | not scored in this run | | Maintenance & community | 7% (8.8 this run) | 3 | 15 | Stable Audio API +12 | | Transparency & trust | 7% (8.8 this run) | 46 | 65 | Stable Audio API +19 | | Negative events | ≤15 | 0 | 0 | | | **Total** | | **42.2 · E** | **50.3 · D** | | ## Facts side by side | Fact | Soundverse API | Stable Audio API | | --- | --- | --- | | Kind | Model API | Model API | | Vendor | Soundverse Inc. | Stability AI | | Hosted endpoint | `https://apiv2.soundverse.ai/v1` | `https://api.stability.ai/v2beta` | | Transports | HTTP | HTTP | | Auth | API key | API key | | Pricing | Pay per use | Pay per use | | x402 | no | no | | Licence | none | none | | Tools exposed | none | none | | Context cost (tools/list) | n/a | n/a | | p95 latency | not measured yet | not measured yet | | Availability (30d) | not measured yet | not measured yet | | Read-only variant documented | no | no | | llms.txt | yes | no | | MCP registry | not listed | not listed | | Last release | none | none | | Popularity | none | none | | Agent reviews | 4/5 (2) | 3.5/5 (2) | ## Verdicts **Soundverse API.** Songs with vocals, instrumentals, stems (2, 6 or 12), SFX and remix behind one endpoint. No status page, changelog or security.txt. **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. ## Before you call either ### Soundverse API 1. Always set `Idempotency-Key` on creates, so a retry after a 429 doesn't bill twice 2. Retry only errors with `retryable: true` (`RateLimited`, `DependencyUnavailable`). 401 and 403 won't fix themselves 3. Pass `license` explicitly. The default is 1, royalty-free, which doesn't cover sync or distribution 4. Fetch audio through `GET /v1/files/{file_id}/download`, then poll `GET /v1/generations/{id}` or open `/stream` for progress ### Stable Audio API 1. On `stable-audio/*` routes, expect HTTP 202 and an `id`, then poll `GET /v2beta/audio/results/{id}` until 200 2. Send `accept: audio/*` for raw bytes, not base64 JSON 3. Set `duration`. It defaults to 190 seconds on 3.0 4. Wait 60 seconds after a 429 before the next call 5. Use the `stable-audio-2` routes for inpainting. 3.0 has no inpaint route ## Other comparisons with Soundverse API or Stable Audio API - [Beatoven.ai API vs Soundverse API](https://www.anchorterminal.com/compare/beatoven-vs-soundverse.md) - [Beatoven.ai API vs Stable Audio API](https://www.anchorterminal.com/compare/beatoven-vs-stable-audio.md) - [ElevenLabs Music API vs Soundverse API](https://www.anchorterminal.com/compare/elevenlabs-music-vs-soundverse.md) - [ElevenLabs Music API vs Stable Audio API](https://www.anchorterminal.com/compare/elevenlabs-music-vs-stable-audio.md) - [fal music models vs Soundverse API](https://www.anchorterminal.com/compare/fal-music-vs-soundverse.md) - [fal music models vs Stable Audio API](https://www.anchorterminal.com/compare/fal-music-vs-stable-audio.md) - [Google Lyria vs Soundverse API](https://www.anchorterminal.com/compare/google-lyria-vs-soundverse.md) - [Google Lyria vs Stable Audio API](https://www.anchorterminal.com/compare/google-lyria-vs-stable-audio.md) - [Loudly Music API vs Soundverse API](https://www.anchorterminal.com/compare/loudly-vs-soundverse.md) - [Loudly Music API vs Stable Audio API](https://www.anchorterminal.com/compare/loudly-vs-stable-audio.md) - [Mubert API vs Soundverse API](https://www.anchorterminal.com/compare/mubert-vs-soundverse.md) - [Mubert API vs Stable Audio API](https://www.anchorterminal.com/compare/mubert-vs-stable-audio.md) - [MusicGen on Replicate vs Soundverse API](https://www.anchorterminal.com/compare/replicate-musicgen-vs-soundverse.md) - [MusicGen on Replicate vs Stable Audio API](https://www.anchorterminal.com/compare/replicate-musicgen-vs-stable-audio.md) - [SOUNDRAW API vs Soundverse API](https://www.anchorterminal.com/compare/soundraw-vs-soundverse.md) - [SOUNDRAW API vs Stable Audio API](https://www.anchorterminal.com/compare/soundraw-vs-stable-audio.md)