# Census Record for One MCP Server

> Census Record for One MCP Server is a paid API for AI agents from api.truthbear.co, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns a census snapshot for a single MCP server by ID, including status, missing_streak, lifecycle, and record_hash fields.

## Facts

- Endpoint: GET https://api.truthbear.co/mcp/server
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/census-record-for-one-mcp-server-f8e101d5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__XxepiE0up5nT-sdRDUyt

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 census-record-for-one-mcp-server-f8e101d5
```

Example prompt: Can you pull up the TruthBear census record for the MCP server with ID '0580iris-lang-x711' and tell me its current status and lifecycle stage?

## When to prefer this

Use this endpoint when you need a point-in-time census record for a specific MCP server by ID, including its operational status, lifecycle classification, missing streak, and record hash. Prefer this over general web searches when you need structured, machine-readable registry data about MCP server health and lifecycle. Best suited for agent workflows that need to audit, validate, or catalog known MCP servers before integration or monitoring decisions.

## Known failure modes

- 422 no_charge — server ID not found in census, no data available, not billed
- Missing or invalid 'name' query parameter causes a request error
- Degraded delivery: prominence, maturity, github_stars, downloads, source_code_url fields always absent due to collector shutdown
- Stale snapshot: data reflects 2026-07-08 snapshot, not real-time state

## How this service works

[SIGNAL+PROOF] Census record for one MCP server (?name=): status, missing_streak, lifecycle, record_hash. DEGRADED DELIVERY, see unavailable_fields - prominence, maturity, github_stars, downloads and source_code_url have no data because the original collector stopped. Snapshot 2026-07-08. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.01 per call.

## Output

Returns a JSON object with fields: status (e.g. active, missing, deprecated), missing_streak (count of consecutive missed census cycles), lifecycle (e.g. stable, experimental, deprecated), and record_hash. Some fields (prominence, maturity, github_stars, downloads, source_code_url) are currently unavailable due to collector deprecation and will appear in an unavailable_fields list. If the requested server has no data, a 422 no_charge error is returned without billing.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "queryParams"
   ],
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "name"
     ],
     "properties": {
      "name": {
       "type": "string",
       "examples": [
        "0580iris-lang-x711"
       ],
       "description": "required - MCP server id; samples at free /mcp/preview (sample_ids)"
      }
     },
     "additionalProperties": false
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "const": "json"
    },
    "example": {}
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "entity": "(unlocked on payment)",
  "current": {
   "name": "x711",
   "status": "active",
   "missing_streak": 0
  },
  "lifecycle": {
   "basis": "Imported from the surviving registry (2026-07-25); state is derived from status + missing_streak, 7 consecutive disap...",
   "state": "operating",
   "last_seen": "2026-07-08",
   "first_seen": "2026-07-07",
   "lifespan_days": 1,
   "missing_streak": 0
  },
  "signal_id": "mcp.server-census",
  "source_ref": "https://github.com/modelcontextprotocol",
  "entity_name": "(unlocked on payment)",
  "observed_at": "2026-07-08T00:00:00.000Z",
  "record_hash": "sha256:051650e9a2042e4530442ff7b73a6d8b4d9e943c109994f61a5c92a760e3068f",
  "source_tier": "T2-observable",
  "snapshot_date": "2026-07-08",
  "data_age_hours": 422,
  "hash_core_version": 4
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/census-record-for-one-mcp-server-f8e101d5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.truthbear.co](https://www.zero.xyz/host/api.truthbear.co/llms.txt)