vokko.eu / report / vercel.com

vercel.com

Origin-owner checklist from missing spec fields. Not a login. Not a grade letter.

presence 2026-09-01T14:16:52.667Z · callability 2026-09-01T14:16:52.667Z · live re-run is €29/mo

7 items an origin owner can fix without completing checkout.

ucp · ucp.missing
No machine UCP profile at /.well-known/ucp.
Publish JSON with a YYYY-MM-DD version, services, capabilities, and payment_handlers.
https://ucp.dev
x402 · x402.missing
No x402 challenge on the homepage or /.well-known/x402.
If you sell machine calls, return HTTP 402 with a PAYMENT-REQUIRED header. Vokko never sends PAYMENT-SIGNATURE to you.
https://www.x402.org
mpp · mpp.missing
No WWW-Authenticate: Payment challenge on the observed GETs.
If you speak MPP, challenge with WWW-Authenticate: Payment. There is no public /.well-known/mpp.
https://docs.stripe.com
tap · tap.missing
No HTTP Message Signatures directory.
GET /.well-known/http-message-signatures-directory should return JSON 200 if you speak TAP.
https://corporate.visa.com
mcp · mcp.partial
MCP path did not return a JSON manifest.
Serve application/json, not HTML, at the MCP well-known path.
https://modelcontextprotocol.io
a2a · a2a.missing
No A2A agent card.
Publish /.well-known/agent-card.json (preferred) or /.well-known/agent.json with name and skills.
https://a2a-protocol.org
llms · llms.missing
No /llms.txt map.
Publish /llms.txt describing machine-readable entry points.
https://llmstxt.org