REQUIRED idempotency token for money-moving requests (e.g. transfers). The token is used by the API so a retry after a 5xx/timeout replays the original result instead of moving funds twice. Reuse the same key to retry safely; use a NEW key to issue a genuinely new transfer. Use 1-255 printable ASCII characters.

Select the Account for an Account-scoped operation. A direct ServiceAccount API key MUST supply this header, and the target must be within the ServiceAccount owner's or Authorization grant's Account boundary. A Person bearer may select an Account on which it has an active Stakeholder, and an Account session may select its bound Account (or a descendant only when the session explicitly includes descendants).

Strong ETag from the latest resource GET or write response.

Generated from available response content types