# MCP Ecosystem Full Census

> MCP Ecosystem Full Census is a paid API for AI agents from aeml-x402.zeabur.app, paid per call via x402, $0.09/call, status unknown (last checked 2026-09-15).

Returns a full-population snapshot of 21,236+ MCP servers with status, lifecycle, missing streak, and record hash metadata as of 2026-07-08

## Facts

- Endpoint: GET https://aeml-x402.zeabur.app/mcp/census
- Price: $0.09/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mcp-ecosystem-full-census-a4208fce
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pM778AdDfVTTwcsIjU_lu

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 mcp-ecosystem-full-census-a4208fce
```

Example prompt: Pull the full MCP ecosystem census for me — I want to see all 21,000+ servers with their current status, lifecycle stage, and missing streak data from the latest snapshot.

## When to prefer this

Use this endpoint when you need a comprehensive, population-level view of all known MCP servers in a single call — ideal for ecosystem analysis, server discovery, health monitoring, or building downstream indexes. Prefer this over targeted search endpoints when you need the full corpus rather than a filtered subset. Note that prominence-based sorting is unavailable; if you need ranked results by popularity or stars, this endpoint cannot fulfill that need.

## Known failure modes

- Payment failure (x402 USDC payment not completed — endpoint requires $0.5 USDC per call)
- Timeout on large payload (~21k rows may be slow on poor connections)
- Stale data — snapshot is fixed at 2026-07-08 so real-time accuracy is not guaranteed
- Missing fields for prominence/maturity/github_stars/downloads returned as null or omitted per unavailable_fields

## How this service works

[BATCH+PROOF] Full MCP ecosystem census (21,236 servers, latest day): status, lifecycle, missing_streak, record_hash. DEGRADED DELIVERY, see unavailable_fields - prominence, maturity, github_stars and downloads have no data, so rows are no longer ranked. Snapshot 2026-07-08. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed.

## Output

A JSON object containing a 'rows' array of all MCP server records (up to 21,236 entries) with fields including server status, lifecycle state, missing_streak (consecutive days absent from crawl), and record_hash; plus a 'count' integer indicating total records returned. Note: prominence, maturity, github_stars, and downloads fields are unavailable due to collector shutdown.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "verifiable": {
       "type": "string",
       "description": "optional - set to 1 to attach `_hash_core` per row (the canonical pre-image of the record_hash for that row) so you can recompute and verify fully offline; omitted by default to keep the payload small - for online verification use free GET /gauge/verify?hash="
      }
     },
     "additionalProperties": false
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "const": "json"
    },
    "example": {}
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mcp-ecosystem-full-census-a4208fce/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from aeml-x402.zeabur.app](https://www.zero.xyz/host/aeml-x402.zeabur.app/llms.txt)