Endpoint set
POST /api/payments
POST /api/payments/pay_204/capture
POST /api/refunds
GET /api/disputes/dsp_88
GET /api/payment-methodsExample response
{
"id": "pay_204",
"amount": 12900,
"currency": "USD",
"status": "authorized"
}Payment mocks should include declined cards, duplicate submissions, partial refunds, processor timeouts, and webhook retries.