Get rail options for account transfer
Authentication
x-api-keystring
RootPay API key sent in the x-api-key header. Keys are environment-scoped: live_* for production, test_* for sandbox.
Query parameters
from_account_id
Source main account ID.
to_account_id
Destination main account ID.
Response
Successful Response
data
Supported rails for a from/to main account pair.
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