Charge a specific installment
Charges a specific installment (by sequence number) of a payment plan
against the plan’s stored payment method. Flows through the canonical
chargeOrder path. Requires payments:write scope. Idempotent via the
Idempotency-Key header.
Authorizations
API key issued per entity via Settings > Developers > API Keys.
Each key carries scopes (e.g. orders:read, products:write).
Bearer token format: Authorization: Bearer ark_live_ent_Test keys use ark_test_ent_. Both are issued per entity
via Settings > Developers > API Keys.
Headers
Client-generated unique key for idempotent POST/PATCH/DELETE operations. Max 255 chars. On retry with the same key, the original response is returned without re-executing the operation. Keys expire after 24 hours. Pattern: or --.
255Path Parameters
Payment plan UUID.
Installment sequence number (1-based).
Body
Override the plan default payment method for this charge.
Response
Installment charged.
The response is of type object.

