curl --request GET \
  --url https://api.x402layer.cc/api/marketplace

{
  "listings": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "slug": "<string>",
      "description": "<string>",
      "type": "<string>",
      "mode": "<string>",
      "price": 123,
      "currency": "<string>",
      "chain": "<string>",
      "api_schema": {
        "baseUrl": "<string>",
        "routes": [
          {
            "path": "/users/{id}",
            "summary": "<string>",
            "parameters": [
              {
                "name": "<string>",
                "required": true,
                "description": "<string>",
                "example": "<string>"
              }
            ],
            "requestBody": {
              "fields": [
                {
                  "name": "<string>",
                  "required": true,
                  "description": "<string>",
                  "example": "<string>"
                }
              ],
              "example": "<string>"
            },
            "responseExample": "<string>"
          }
        ]
      }
    }
  ],
  "total": 123,
  "limit": 123,
  "offset": 123,
  "hasMore": true
}