Update fields on an existing budget. Partial update.
maxCredits or maxCreditsCents changes, the alert state resets so the
budget can refire the credit.budget.exhausted webhook at the new cap.
Scope: contracts:writeBearer authentication header of the form Bearer <token>, where <token> is your auth token.
The unique identifier of the contract (UUID)
Budget array index (from GET /budgets response)
x >= 0Budget updated