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POST
Void an authorization

Authorizations

Authorization
string
header
required

API key (fp_live_/fp_test_) or JWT bearer token

Headers

Idempotency-Key
string

Optional client-generated key (UUID recommended) used to deduplicate retries. The first request with a given key executes normally; a retry with the same key replays that first response with X-Idempotent-Replayed: true for up to 24 hours. A concurrent retry while the first request is still in flight returns 409.

The response cache is keyed on the authenticated merchant and this key ONLY — not on the operation, path, or request body. Use a fresh, unique key per logical request: reusing one key across different operations (for example a purchase and then a capture) replays the first operation's cached status and body instead of performing the second.

Maximum string length: 255

Path Parameters

id
string
required

Transaction slug (authorization to void)

Body

application/json
transaction
object

Response

Void completed

data
object
required
meta
object
required