Error and status code reference

Registry Stack HTTP products own their error contracts. Use the product reference that matches the service you call instead of assuming codes or response shapes carry across products.

Registry Evidence

Registry Evidence problem types is the maintained reference for the Gateway’s closed problem set. The runtime-owned generator reproduces its committed schema and OpenAPI artifacts under CI.

Evidence OID4VCI supporting service

The OID4VCI delivery service has its own protocol error vocabulary in the committed OpenAPI artifact. Framework-level refusals that never enter the protocol handler can intentionally use text/plain.

Retired Relay codes

Registry Relay and its problem-code catalog were retired in Registry Stack 0.39.0. Existing integrations can use the immutable 0.38.0 documentation while planning a replacement. See the Relay retirement decision.