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POST
Reserve a managed asset upload

Authorizations

Authorization
string
header
required

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

Idempotency-Key
string
required
Required string length: 1 - 200
X-BatchRelay-Client-Surface
string

Untrusted optional analytics hint naming the calling client surface. It never affects authorization, routing, pricing, or behavior.

Required string length: 1 - 100
X-BatchRelay-Client-Version
string

Untrusted optional analytics hint naming the calling client version. It never affects authorization, routing, pricing, or behavior.

Required string length: 1 - 100
X-BatchRelay-Invocation-Mode
string

Untrusted optional analytics hint naming the invocation mode. It never affects authorization, routing, pricing, or behavior.

Required string length: 1 - 100

Path Parameters

studio_id
string
required

Stable public studio ID beginning with stu_. The API never selects a studio implicitly; a local CLI profile name is not a studio ID.

Required string length: 5 - 256
Pattern: ^stu_[A-Za-z0-9_-]+$

Body

application/json
filename
string
required
Required string length: 1 - 255
max_bytes
integer
required
Required range: 1 <= x <= 20971520

Response

Temporary upload capability

expires_at
string<date-time>
required
upload_session_id
string
required
upload_url
string<uri>
required
read-only

Short-lived upload capability. Treat as secret; do not log or persist it.