# Council of AI — MCP Endpoint Probe

> Council of AI — MCP Endpoint Probe is a paid API for AI agents from councilof.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-02).

Probes a public MCP (Streamable HTTP) endpoint to determine its reachability, authentication requirements, protocol version, and available tools, returning a signed, verifiable receipt.

## Facts

- Endpoint: GET https://councilof.ai/api/ras/mcp-probe?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/council-of-ai-mcp-endpoint-probe-24d3b44e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IB-ADfp6ZBAth3rKd3pSh

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability council-of-ai-mcp-endpoint-probe-24d3b44e
```

Example prompt: Can you probe the MCP endpoint at https://myserver.example.com/mcp and tell me if it's reachable, what protocol version it negotiated, and how many tools it exposes — I want the signed receipt so I can verify the result independently.

## When to prefer this

Use this endpoint when you need an independent, cryptographically verifiable probe of a public MCP (Streamable HTTP) endpoint — especially when you need a signed receipt as auditable evidence of the endpoint's state, tool inventory, or protocol compliance. Prefer it over ad-hoc health checks when auditability and non-repudiation matter, or when building registries, directories, or compliance workflows around MCP servers.

## Known failure modes

- UNREACHABLE — target URL could not be connected to
- TIMEOUT — target did not respond within the probe window
- NOT_MCP — target responded but is not an MCP-compatible endpoint
- MCP_ERROR — target is MCP but returned a protocol-level error
- AUTH_REQUIRED — target requires authentication before responding
- Invalid or non-HTTPS URL rejected with validation error
- Private, link-local, or metadata addresses refused

## How this service works

We measure how AI systems behave against frozen, published tests and publish checkable evidence. Issued measurement cards are signed; unsigned supporting runs are labelled. Read the live board and corrections ledger.

## Output

A JSON receipt containing: the probe state (RESPONDED, AUTH_REQUIRED, NOT_MCP, MCP_ERROR, UNREACHABLE, or TIMEOUT), tool count and SHA-256 of tool names (if available), the requested and negotiated MCP protocol versions, whether a tool was called, and a cryptographically signed receipt with SHA-256 hash and optional ed25519 signature for independent verification.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "format": "uri",
       "pattern": "^https://",
       "description": "public https MCP endpoint (Streamable HTTP); private, link-local and metadata addresses are refused"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "kind": "receipt",
  "result": {
   "kind": "csoai.ras.mcp-probe/0.1",
   "state": "RESPONDED | AUTH_REQUIRED | NOT_MCP | MCP_ERROR | UNREACHABLE | TIMEOUT",
   "tools": {
    "count": "<int or null>",
    "names_sha256": "<hex or null>"
   },
   "protocol": {
    "requested": [
     "2026-07-28"
    ],
    "negotiated": "<version or null>"
   },
   "tool_called": false
  },
  "schema": "csoai.ras.mcp-probe/0.1",
  "receipt": {
   "sha256": "<hex>",
   "sig_ed25519": "<hex or null>"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/council-of-ai-mcp-endpoint-probe-24d3b44e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from councilof.ai](https://www.zero.xyz/host/councilof.ai/llms.txt)