Reserve a managed asset upload
Requires studio_assets:write, a Live key, and Idempotency-Key. upload_url is a short-lived upload capability: do not log or persist it. Stable asset responses expose only opaque metadata and IDs.
Authorizations
Batch Relay scoped API key or an anonymous Test Mode session. Scope names document required capabilities. Anonymous sessions are sandbox-only and do not authorize studio, event, billing, or Live Mode operations.
Headers
1 - 200Untrusted optional analytics hint naming the calling client surface. It never affects authorization, routing, pricing, or behavior.
1 - 100Untrusted optional analytics hint naming the calling client version. It never affects authorization, routing, pricing, or behavior.
1 - 100Untrusted optional analytics hint naming the invocation mode. It never affects authorization, routing, pricing, or behavior.
1 - 100Path Parameters
Stable public studio ID beginning with stu_. The API never selects a studio implicitly; a local CLI profile name is not a studio ID.
5 - 256^stu_[A-Za-z0-9_-]+$