ucp-service-production.up.railway.app
verified_user Multi-version UCP compliance, backward compatibility & transport audit
schedule Last scanned 5/4/2026
Conformance
42%Capability
100%Coverage
33%Backward Compat
0%Negative
47%Transport
100%Latency
99%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
Profile does not declare dev.ucp.shopping.checkout
Capability version strings are valid ISO dates
(instances ?? []) is not iterable
Profile response Content-Type is application/json
Completed in 252ms
Discovery endpoint exposes CORS headers
Completed in 261ms
Profile is served over HTTPS
Completed in 41ms
Two consecutive profile fetches return identical bodies
Completed in 462ms
Signing JWKs use only allowed kty/crv values
Completed in 242ms
No duplicate capability entries (same name + version)
Completed in 252ms
OpenAPI servers[] URL is reachable
Completed in 270ms
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 629ms
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 247ms
Service binding transports are in the allowed set
(bindings ?? []) is not iterable
Profile declares a ucp.version string
Completed in 246ms
Profile ucp.version is one the grader recognizes
Completed in 246ms
Profile is served at the canonical .well-known/ucp path
Completed in 246ms
Declared capabilities match operations in the OpenAPI
Capability JSON Schemas declare a modern $schema draft
Capability-level JSON Schemas are well-formed
3 of 4 capability schemas are malformed
OpenAPI components.schemas has no orphans
Service-level OpenAPI document is valid OpenAPI 3.x
Every OpenAPI operation declares a 2xx JSON response schema
4 of 15 operations have no 2xx application/json response schema
Every $ref referenced schema document is reachable
All declared schema URLs return 200
4 of 6 schema URLs failed to load: [service] https://ucp-service-production.up.railway.app/docs/identity-openapi.json → malformed_json: Unexpected token '<', "<!doctype "... is not valid JSON [capability] https://ucp.dev/schemas/shopping/checkout.json → http_404 [capability] https://ucp.dev/schemas/shopping/fulfillment.json → http_404 [capability] https://ucp.dev/schemas/common/identity_linking.json → http_404
Cancel session response matches the OpenAPI schema
Could not create session: 400
Create session response matches the OpenAPI schema
Expected 2xx, got 400
Discovery profile matches the published JSON Schema
ucp.payment_handlers is missing or not an object
Get session response matches the OpenAPI schema
Could not create session: 400
Update session response matches the OpenAPI schema
Could not create session: 400
Canceling a session twice with the same idempotency key is idempotent
createSession returned status=400
Cancel a checkout session
createSession returned 400
Create checkout session with defaults
createSession returned status=400
Repeated createSession with same idempotency key returns same session
First create failed: 400
Create session then set shipping address
createSession returned 400
Retrieve a checkout session by id
createSession returned 400
Reusing an Idempotency-Key with a different body must be rejected
First createSession returned status=400
update_checkout is idempotent on replay and rejects conflicting replays
createSession returned status=400
Select a shipping method on a checkout session
createSession returned 400
Shipping methods are returned after setting an address
createSession returned 400
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 247ms