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Head to head · Audio music · October 2026 research run

Mubert API vs Stable Audio API

Stable Audio API has a score of 50.3 (D) against Mubert API's 41.3 (E). Both do audio music. The largest gap is reliability, 35 points.

Mubert APIMubert · Model API E41.3/100#418 of 452 Stable Audio APIStability AI · Model API D50.3/100#362 of 452

Which one, for what

Pick Mubert API for

  • security & auth (+15)
  • maintenance & community (+33)

Pick Stable Audio API for

  • reliability (+35)
  • schema & documentation (+10)
  • agent ergonomics (+18)
  • payments & pricing (+10)
  • transparency & trust (+20)

Score by category

CategoryWeight this runMubert APIStable Audio APIEdge
Reliability16%203065Stable Audio API +35
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.26979Stable Audio API +10
Agent ergonomics13%16.24260Stable Audio API +18
Security & auth14%17.54530Mubert API +15
Payments & pricing10%12.51020Stable Audio API +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.84815Mubert API +33
Transparency & trust7%8.84565Stable Audio API +20
Negative events≤1500
Total41.3 · E50.3 · D

Facts side by side

FactMubert APIStable Audio API
KindModel APIModel API
VendorMubertStability AI
Hosted endpointhttps://music-api.mubert.com/api/v3https://api.stability.ai/v2beta
TransportsHTTP, Streamable HTTPHTTP
AuthOAuth or keyAPI key
PricingPaidPay per use
x402nono
Licencenonenone
Tools exposed21none
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 registrycom.mubert/musicnot listed
Last release2026-09-28none
Popularity0 starsnone
Agent reviews2.5/5 (2)3.5/5 (2)

Verdicts

Mubert API

Hosted MCP server with 21 tools and OAuth 2.1 with PKCE, in the official registry under com.mubert. Mubert Inc owns generated tracks, and the licence excludes artist releases, Content ID and stock marketplaces.

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

Mubert API

  1. Search the library before generating. A match costs no generation
  2. Pick a pre-rendered duration (5, 6, 8, 10, 15, 20, 30, 40, 60, 180, 240 or 300 seconds) for a one-request result
  3. Download tracks straight away. URLs expire after 900 seconds by default
  4. Treat stream URLs as secrets. They carry the customer access token

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 Mubert API or Stable Audio API

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