OpenID Financial-grade API (FAPI) Conformance Tests Released for Final FAPI 1.0 Parts 1 and 2 Specifications

Published June 23, 2021

The OpenID Foundation is pleased to announce the release of Financial-grade API (FAPI) OP and RP conformance tests for the Final FAPI 1.0 Part 1 and 2 specifications announced on March 31, 2021.

Many organizations and jurisdictions utilized the FAPI Implementer’s Draft 2 as the starting point of their adoption of FAPI in defining their open banking solution stacks. To assist these organizations and jurisdictions in transitioning from the FAPI RW Implementers Draft 2 to the FAPI 1 Part 1 and 2 final specifications, Joseph Heenan, OpenID Certification Program Technical Lead, published a non-normative list of changes document.

This document is a non-normative list of the changes between the second implementer’s draft of FAPI1 part 1 (read only / baseline) and part 2 (read-write / advanced) and the final versions:

    • Changes are listed as major if they may require alterations to implementations.
    • Changes are listed as minor if they are generally clarifications and are unlikely to require alterations to existing implementations that were already applying best current practice.
    • Most changes have both client and server clauses that reflect the same change to the protocol; such a change is only listed once below in the interests of brevity.

More information about running the new FAPI OP conformance tests can be found here:

More information about running the new FAPI RP conformance tests can be found here:

Please reference the OpenID Certification page for more information about the certification program and to review the current directory of certified implementations. Any questions about OpenID Certification can be sent to

For more information on the Financial-grade API (FAPI) Working Group, please visit: