Publish your x402 API for agent discovery with an Ontario profile and Bazaar Lau

Publish your x402 API for agent discovery with an Ontario profile and Bazaar Launch Passport after free validation: public profile, readiness report, Coinbase indexing preflight, five-query buyer-intent audit, optional MCP procurement evidence, badge, distribution metadata, and 30 days of freshness maintenance. Call when you need public launch evidence. Ontario is not Coinbase. Payment buys processing and publication, not placement, ranking, buyers, or safety.

Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.

Endpoint

POST https://ontarioprotocol.com/api/x402/list-service

Our checks, last 30 days

We never call tools that send, buy, move money or file anything, not even without paying.

Example input (from the provider)

{
  "body": {
    "buyer_query": "get one concrete result for an autonomous agent",
    "description": "Return one concrete result for an autonomous agent after x402 payment.",
    "endpoint": "https://example.com/api/paid",
    "mcp_remote_url": "https://example.com/mcp",
    "mcp_server_json_url": "https://registry.modelcontextprotocol.io/v0.1/servers?search=io.github.example%2Fpaid-tool",
    "mcp_server_name": "io.github.example/paid-tool",
    "method": "POST",
    "name": "Example Paid API",
    "network": "base",
    "owner_url": "https://example.com",
    "price_usdc": "0.01",
    "source": "direct_or_unknown",
    "tags": [
      "x402",
      "agent-api"
    ]
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
}

Promised output schema (from the provider)

{
  "properties": {
    "input": {
      "properties": {
        "body": {
          "properties": {
            "asset": {
              "type": "string"
            },
            "buyer_query": {
              "description": "One public buyer task used to generate the five-query Bazaar retrieval audit. Never include credentials or private customer text.",
              "maxLength": 160,
              "minLength": 3,
              "type": "string"
            },
            "category": {
              "maxLength": 80,
              "type": "string"
            },
            "description": {
              "description": "Factual buyer-facing description of the paid outcome.",
              "maxLength": 1000,
              "minLength": 1,
              "type": "string"
            },
            "endpoint": {
              "description": "Provider-owned public HTTPS x402 endpoint.",
              "format": "uri",
              "type": "string"
            },
            "mcp_remote_url": {
              "description": "Optional public MCP remote. Ontario runs read-only initialize and tools/list; it does not invoke tools or send credentials or payment headers.",
              "format": "uri",
              "maxLength": 500,
              "type": "string"
            },
            "mcp_server_json_url": {
              "description": "Optional public MCP Registry record or exact-search JSON URL. Queries are stripped from public evidence.",
              "format": "uri",
              "maxLength": 500,
              "type": "string"
            },
            "mcp_server_name": {
              "description": "Optional exact MCP Registry server name used to select one record.",
              "maxLength": 180,
              "type": "string"
            },
            "method": {
              "default": "POST",
              "enum": [
                "GET",
                "POST",
                "PUT",
                "PATCH",
                "DELETE"
              ],
              "type": "string"
            },
            "name": {
              "description": "Public service name shown on the provider profile.",
              "maxLength": 120,
              "minLength": 1,
              "type": "string"
            },
            "network": {
              "description": "Public endpoint network, for example base or eip155:8453.",
              "type": "string"
            },
            "owner_contact": {
              "description": "Optional private operator contact; never published.",
              "type": "string"
            },
            "owner_url": {
              "format": "uri",
              "type": "string"
            },
            "price_atomic": {
              "minimum": 0,
              "type": "integer"
            },
            "price_usdc": {
              "description": "Public endpoint price in USDC.",
              "pattern": "^[0-9]+(?:\\.[0-9]{1,6})?$",
              "type": "string"
            },
            "source": {
              "description": "Optional privacy-safe acquisition bucket used only for aggregate funnel attribution; URLs and search queries are not retained.",
              "enum": [
                "coinbase_bazaar",
                "direct_or_unknown",
                "github",
                "google_search",
                "internal_navigation",
                "mcp_registry",
                "other_search"
              ],
              "type": "string"
            },
            "tags": {
              "items": {
                "maxLength": 48,
                "type": "string"
              },
              "maxItems": 12,
              "type": "array"
            }
          },
          "required": [
            "name",
            "description",
            "endpoint",
            "price_usdc"
          ],
          "type": "object"
        }
      },
      "required": [
        "body"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "additionalProperties": true,
          "type": "object"
        }
      },
      "required": [
        "example"
      ],
      "type": "object"
    }
  },
  "required": [
    "input",
    "output"
  ],
  "type": "object"
}

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