Universal Commerce Protocol
UCP Validator
Check whether a storefront publishes a valid Universal Commerce Profile at /.well-known/ucp and whether shopping agents can read it without friction.
Endpoint reachability
We request the public HTTPS domain and confirm that /.well-known/ucp responds.
Schema hygiene
The response body is parsed as JSON and checked for UCP spec errors and warnings.
Agent access
robots.txt is reviewed so you can see whether major shopping and indexing bots are blocked.
Run a live validation
Paste a domain and we'll fetch the live /.well-known/ucp document, parse every service, capability, payment handler and signing key, then validate it against the 2026-04-08 spec.
HTTPS & reachability
Served over TLS and responding to live requests.
Profile discovery
The document is published at /.well-known/ucp.
Services & transports
REST, MCP and A2A surfaces agents negotiate against.
Capabilities
Cart, checkout and order flows the storefront declares.
Payment handlers
Tokenization endpoints and their declared versions.
Signing keys
Public JWKs for RFC 9421 request verification.
Supported versions
Every protocol version the merchant still serves.
robots.txt access
Shopping and indexing agents are not blocked.
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Made for merchants who refuse to be invisible to AI.