{
  "protocolVersion": "1.0",
  "name": "MCP Answer-Quality Canary",
  "description": "Continuously verifies that MCP servers answer correctly: real MCP protocol canary calls (list + seeded-record search) cross-checked against independent ground truth, returning agent-readable PASS / FAIL / UNKNOWN verdicts with defect classes (truncation, null result, wrong value, missing seeded record, pagination loop, timeout). $0.50 per server/month flat; first month free on the first 5 servers, once per operator.",
  "url": "https://textforagents.com/products/mcp-answer-quality-canary/",
  "supportedInterfaces": [
    {
      "url": "https://textforagents.com/products/mcp-answer-quality-canary/",
      "protocolBinding": "HTTP+JSON",
      "protocolVersion": "1.0"
    }
  ],
  "provider": {
    "organization": "TextForAgents LLC",
    "url": "https://textforagents.com"
  },
  "version": "1.0.0",
  "documentationUrl": "https://textforagents.com/products/mcp-answer-quality-canary/llms.txt",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false,
    "extensions": [
      {
        "uri": "https://modelcontextprotocol.io",
        "description": "Also available as an MCP streamable-http server at https://textforagents.com/products/mcp-answer-quality-canary/mcp (Bearer token auth).",
        "required": false
      },
      {
        "uri": "https://x402.org",
        "description": "Paid access settles via x402 (scheme exact, Base mainnet USDC) to payTo 0x7a482F3B58780519880a6A13F983E958f2Ed6A61 (textforagents.base.eth). Self-serve: POST /register then POST /trial (one-time free trial) or POST /subscribe on the product base URL.",
        "required": false
      }
    ]
  },
  "securitySchemes": {
    "bearer": {
      "type": "http",
      "scheme": "bearer",
      "description": "Opaque per-customer API token issued self-serve via POST /register + POST /trial or /subscribe on the product base URL."
    }
  },
  "security": [
    {
      "bearer": []
    }
  ],
  "defaultInputModes": [
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "skills": [
    {
      "id": "canary-watch",
      "name": "Watch an MCP server",
      "description": "Create a canary watch on an MCP server with seeded ground truth; hourly checks at the flat price.",
      "tags": [
        "mcp",
        "monitoring",
        "quality"
      ]
    },
    {
      "id": "canary-check",
      "name": "Run a canary check",
      "description": "Run a check now and get a verdict with defect classification; no ground truth returns UNKNOWN, never a false PASS.",
      "tags": [
        "mcp",
        "verification",
        "testing"
      ]
    }
  ]
}