transaction_hash.
They share the same body shape as offramp / onramp, except transaction_hash and chain are omitted.
Top up that balance with crypto via POST /account/fund then POST /account/fund/confirm.
Core endpoints
Full request and response examples: Collection & disbursement.
Auth
x-api-key = partner consumer key.
Currency prefixes
When to use /v1 instead
Payment locks
Collections and disbursements can be temporarily locked per country (400 with a maintenance-style message). Check POST /v2/exchange-rate for ramp flags on the unified API.