FAPI 2.0 Security Profile: OAuth 2.0 Hardening for Open Banking with PAR, DPoP and mTLS Posted by By MPRAUTO MPRAUTO October 10, 2026Posted inTechNo Comments FAPI 2.0 explained: the OpenID Foundation security profile for open banking, PAR, PKCE, DPoP and mTLS sender-constrained tokens, JAR/JARM, attack models.