Sync API lets you initiate a verification request and expect an immediate response on the status of the verification. Essentially, you will need the following API—
Verify bank account—This lets you initiate a verification request, and get verification status in response.
Async lets you initiate a verification request and let it complete asynchronously—without having to wait for an immediate response. Essentially, you will need the following 2 APIs—
Verify bank account—This lets you initiate a verification request.
Get verification request details—This lets you check the status associated with the verification request.