The opaque organization id issued to you, normally CUID-shaped (for
example cmsx…). It is not an org_-prefixed alias. Pass it unchanged
in every organization-scoped path.

Positive decimal string. Defaults to 10000.00 when the body or field is omitted.

A unique value per logical operation, 1-255 chars of A-Z a-z 0-9 _ . : -.

Reuse it to retry. Same key with the same body replays the stored
response; same key with a different body is a 409, because
answering with the first call's result would hand you a receipt for a
payout you did not request. A 4xx releases the key, so you can fix the
body and reuse it.

Reuse it — do not generate one per attempt. A key minted per attempt
defeats replay entirely: every retry looks like a new request, so every
retry pays. We also watch for an identical body arriving under a
different key within 15 minutes and refuse it with
DUPLICATE_REQUEST_DETECTED.

Records are kept for 7 days. That is a retention window, not a
correctness one — there is no path where an expired key is re-executed.