free protocol tool

UCP Validator

Validate Universal Commerce Protocol discovery and profile JSON against Steelyard's UCP validators. Bare origins normalize to /.well-known/ucp before fetching.

/.well-known/ucp

profile documents with top-level ucp

input

schema

json payload

{
  "ucp": {
    "version": "2026-04-17",
    "services": {
      "dev.ucp.shopping": [
        {
          "version": "2026-04-17",
          "spec": "https://ucp.dev/2026-04-17/specification/overview",
          "transport": "rest",
          "schema": "https://ucp.dev/2026-04-17/services/shopping/rest.openapi.json",
          "endpoint": "https://coffee.example/api"
        }
      ]
    },
    "capabilities": {
      "dev.ucp.shopping.catalog.search": [
        {
          "version": "2026-04-17",
          "spec": "https://ucp.dev/2026-04-17/specification/catalog-search",
          "schema": "https://ucp.dev/2026-04-17/schemas/shopping/catalog_search.json"
        }
      ],
      "dev.ucp.shopping.catalog.lookup": [
        {
          "version": "2026-04-17",
          "spec": "https://ucp.dev/2026-04-17/specification/catalog-lookup",
          "schema": "https://ucp.dev/2026-04-17/schemas/shopping/catalog_lookup.json"
        }
      ],
      "dev.ucp.shopping.checkout": [
        {
          "version": "2026-04-17",
          "spec": "https://ucp.dev/2026-04-17/specification/checkout",
          "schema": "https://ucp.dev/2026-04-17/schemas/shopping/checkout.json"
        }
      ]
    },
    "payment_handlers": {
      "net.steelyard": [
        {
          "id": "stripe",
          "version": "2026-04-17",
          "available_instruments": [
            {
              "type": "card"
            }
          ]
        }
      ]
    }
  },
  "merchant": {
    "name": "Steelyard Coffee",
    "domain": "coffee.example"
  },
  "links": {
    "commerce_manifest": "https://coffee.example/.well-known/commerce.json"
  }
}

No report yet. Load a sample payload or paste a live protocol response, then run validation.