next.ketshoptest.com
verified_user Multi-version UCP compliance, backward compatibility & transport audit
schedule Last scanned 5/4/2026
Conformance
54%Capability
100%Coverage
24%Backward Compat
0%Negative
44%Transport
100%Latency
98%Audit Details
Cache-Control max-age is within recommended bounds
No Cache-Control header — clients may re-fetch every request
Profile response advertises cache headers
Discovery response has no Cache-Control header
Profile declares at least the checkout capability
Completed in 249ms
Capability version strings are valid ISO dates
Completed in 249ms
Profile response Content-Type is application/json
Completed in 251ms
Discovery endpoint exposes CORS headers
Completed in 249ms
Profile is served over HTTPS
Completed in 457ms
Two consecutive profile fetches return identical bodies
Completed in 470ms
Signing JWKs use only allowed kty/crv values
Completed in 249ms
No duplicate capability entries (same name + version)
Completed in 249ms
OpenAPI servers[] URL is reachable
Profile has no loadable service-level OpenAPI document
Business profile has a valid structure
Business profile failed schema validation
Merchant responses are signed with the published signing_keys
Merchant publishes signing_keys but did not sign this response (no X-UCP-Signature / RFC 9421 / body JWS). Signing is recommended so agents can verify response authenticity.
robots.txt allows AI agents to read the UCP profile
Completed in 34ms
All declared schema URLs use HTTPS
(bindings ?? []) is not iterable
Signing keys are importable via Web Crypto
1 of 1 signing key(s) failed Web Crypto import
Profile advertises well-formed signing keys
Completed in 264ms
Service binding transports are in the allowed set
(bindings ?? []) is not iterable
Profile declares a ucp.version string
Completed in 251ms
Profile ucp.version is one the grader recognizes
Completed in 248ms
Profile is served at the canonical .well-known/ucp path
Completed in 249ms
Declared capabilities match operations in the OpenAPI
No OpenAPI operations available to cross-check
Capability JSON Schemas declare a modern $schema draft
Profile declares no capability JSON Schemas
Capability-level JSON Schemas are well-formed
2 of 2 capability schemas are malformed
OpenAPI components.schemas has no orphans
Profile has no loadable service-level OpenAPI document
Service-level OpenAPI document is valid OpenAPI 3.x
No service-level OpenAPI schema was loaded
Every OpenAPI operation declares a 2xx JSON response schema
Profile has no loadable service-level OpenAPI document
Every $ref referenced schema document is reachable
Profile declares no loadable schema documents
All declared schema URLs return 200
4 of 4 schema URLs failed to load: [service] https://example.com/openapi.json → http_404 [capability] https://ucp.dev/schemas/shopping/checkout.json → http_404 [capability] https://ucp.dev/schemas/shopping/catalog.json → http_404 [payment] https://example.com/ucp/handler/schema.json → http_404
Cancel session response matches the OpenAPI schema
Could not create session: 201
Create session response matches the OpenAPI schema
Schema unavailable: no_openapi
Discovery profile matches the published JSON Schema
Completed in 251ms
Get session response matches the OpenAPI schema
Could not create session: 201
Update session response matches the OpenAPI schema
Could not create session: 201
Canceling a session twice with the same idempotency key is idempotent
First cancel returned status=404
Cancel a checkout session
cancelSession returned 404
Create checkout session with defaults
Checkout session failed schema validation
Repeated createSession with same idempotency key returns same session
Completed in 481ms
Create session then set shipping address
setShippingAddress returned 404
Retrieve a checkout session by id
getSession returned 404
Reusing an Idempotency-Key with a different body must be rejected
Server accepted a second create with the same idempotency key but a different currency (USD → EUR). Per the spec, the second call must be rejected.
update_checkout is idempotent on replay and rejects conflicting replays
First update returned status=404
Select a shipping method on a checkout session
setShippingAddress returned 404
Catalog capability advertised for product lookup
Profile does not declare dev.ucp.shopping.catalog.lookup
Catalog capability is declared
Profile does not declare dev.ucp.shopping.catalog.search
Checkout capability is declared and reachable
Completed in 254ms
Fulfillment capability is declared
Profile does not declare dev.ucp.shopping.fulfillment