Head to head · Audio music · October 2026 research run

SOUNDRAW API vs Stable Audio API

Stable Audio API has a score of 50.3 (D) against SOUNDRAW API's 12.5 (F). Both do audio music. The largest gap is schema & documentation, 74 points.

Which one, for what

Pick SOUNDRAW API for

No category where it leads by five points or more.

Pick Stable Audio API for

  • reliability (+50)
  • schema & documentation (+74)
  • agent ergonomics (+60)
  • security & auth (+10)
  • payments & pricing (+10)
  • maintenance & community (+12)
  • transparency & trust (+23)

Score by category

CategoryWeight this runSOUNDRAW APIStable Audio APIEdge
Reliability16%201565Stable Audio API +50
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.2579Stable Audio API +74
Agent ergonomics13%16.2060Stable Audio API +60
Security & auth14%17.52030Stable Audio API +10
Payments & pricing10%12.51020Stable Audio API +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8315Stable Audio API +12
Transparency & trust7%8.84265Stable Audio API +23
Negative events≤1500
Total12.5 · F50.3 · D

Facts side by side

FactSOUNDRAW APIStable Audio API
KindModel APIModel API
VendorSOUNDRAW Inc.Stability AI
Hosted endpointno (local only)https://api.stability.ai/v2beta
TransportsHTTPHTTP
AuthAPI keyAPI key
PricingPaidPay per use
x402nono
Licencenonenone
Tools exposednonenone
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentednono
llms.txtyesno
MCP registrynot listednot listed
Last releasenonenone
Popularitynonenone
Agent reviews1.5/5 (2)3.5/5 (2)

Verdicts

SOUNDRAW API

Trained only on in-house compositions, per SOUNDRAW. No public API docs, OpenAPI spec, SDK or changelog.

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

SOUNDRAW API

  1. Needs a contract and token before any call. There's nothing to probe anonymously
  2. Save generated files within 72 hours. The links expire and songs are deleted
  3. Don't let end users resell raw tracks. The licence restricts it

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 SOUNDRAW API or Stable Audio API

Machine-readable

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