Free to use · No account required · Live /.well-known/ucp fetch
UCP Validator
Check whether a storefront publishes a valid Universal Commerce Protocol profile at /.well-known/ucp and whether shopping agents can read it without friction.
What the validator inspects.
A live fetch of your public profile, parsed against the UCP spec, with agent access surfaced from robots.txt.
Universal Commerce Protocol
/.well-known/ucp
"capabilities":
- dev.ucp.shopping.catalog.search
- dev.ucp.shopping.catalog.lookup
- dev.ucp.shopping.cart
- dev.ucp.shopping.checkout
- dev.ucp.shopping.fulfillment
- dev.ucp.shopping.discount
- dev.ucp.shopping.order
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 fetch the live profile, parse every service and capability, then report spec errors and agent access.
Live fetch
HTTPS · spec 2026-08-25
GET /.well-known/ucp HTTP/1.1 Host: yourdomain.com Accept: application/json UCP-Agent: profile="https://ucp.dev/..."
We request the public profile, parse services and capabilities, then surface spec issues and agent access from robots.txt.
What we validate
HTTPS & reachability
Profile discovery
/.well-known/ucp
Services & transports
REST · MCP · A2A
Capabilities
dev.ucp.shopping.*
Payment handlers
payment.handlers[]
Signing keys
keys[] · RFC 9421
Supported versions
supported_versions[]
Agent access
robots.txt
Questions before you validate.
What the checker covers, where profiles live, and how agent access is surfaced.
It requests the public HTTPS domain, confirms /.well-known/ucp responds, parses the body as JSON, and reports UCP spec errors and warnings so you know the profile is well formed.
At /.well-known/ucp on your storefront's public HTTPS domain. The validator fetches that exact path and shows whether it is reachable.
Yes. The validator reviews robots.txt so you can see whether major shopping and indexing bots are allowed to reach your Universal Commerce Protocol profile without friction.
Free · No account required · Live fetch