API

API changelog

This changelog provides an overview of the recent changes made to the Payabli APIs.
June 1, 2026

This entry covers the API changes released on June 1, 2026.

New and updated unified response codes

We’ve added new codes and updated the text for several existing codes in the Pay In unified response codes reference. These codes apply to Pay In transactions made with v2 of the API.

New response codes

CodeHTTP Status CodeReason
D0316402Authentication error
D0480402Inactive account
D0481402Closed account
D0740402ACH Risk Decline
E3017400Invalid Total Amount
E3729400Invalid Amount
E7046400The checkuniqueId provided is not valid

We also added descriptions to the existing D1000, D1001, D1002, and D1003 codes and clarified their resolution steps.

Updated response code text

We revised the description, resolution, or both for these existing codes:

CodeWhat changed
D0715Resolution now directs you to attempt an ACH Return
D0725Updated description and resolution
D0730Updated description and resolution
D0731Updated description and resolution
D0735Updated description

See the Pay In unified response codes reference for the full description and resolution text for every code.