An API gateway can provide a shared verification point. Define how trusted decisions reach downstream services and whether alternative routes enforce the same rules.
Evaluation approach
Establish a common contract for evidence validation, identity context and errors. Close direct service routes that bypass the gateway.
Application example
A user with valid application evidence must still fail the owning service's access check when requesting another account's object.
Limits and considerations
Central verification cannot know every object-level business rule.
Authorization after the gateway
The gateway can validate application evidence and reject selected requests. Object ownership and detailed business rules often require service context. Forward verified results to internal services securely.
An external client must not spoof verification by supplying the same header. Review alternative ingress paths and direct service access. Gateway success must not remove application authorization.
Checks and decisions
- Restrict direct access
- Standardize errors
- Preserve service authorization
Use the gateway for shared checks while retaining context-specific decisions in the appropriate services.
Sources
The primary references above provide the technical basis. Example workflows and evaluation suggestions are this publication’s explanations, not independent test results for a particular product.