Where is the api docs?

[hakkikonu]

Stable Audio 3 Large	—	SAME-Large	API only	2.7B	380s	Highest quality, API only. Not supported by this repo, see the API docs

Stable Audio 3 Large — SAME-Large API only 2.7B 380s Highest quality, API only. Not supported by this repo, see the API docs

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In readme file it refers to api docs. Is there an api for these models actually instead of monthly subscription on https://stableaudio.com/