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Council of AI — MCP Registry Population Slice
x402
Council of AI — MCP Registry Population Slice is a paid API for AI agents from councilof.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).
Returns a signed, verifiable population slice of server names indexed from the official MCP registry, with attestation metadata and cryptographic provenance.
Price / call$0.01
Success—
StatusUnknown
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
Returns a JSON object with the total count of MCP registry server names (n), a unique slice ID, raw population rows, an as_of timestamp, indexing state, schema version, settlement details (payer, network, transaction), source file references, and a signed attestation block containing a card schema URL, SHA-256 of the payload, surface label, and an optional ed25519 signature for cryptographic verification.
Example use cases
Audit MCP registry server count
“Can you fetch the Council of AI's signed MCP registry snapshot and tell me how many server names are currently indexed, plus the as_of timestamp?”
Verify registry data integrity
“I need to confirm the integrity of the MCP registry data — grab the latest Council of AI population slice and give me the SHA-256 hash and ed25519 signature so I can check it myself.”
Track MCP ecosystem growth over time
“Get me the current Council of AI MCP registry population slice — I want to record the server count and timestamp so I can track how the MCP ecosystem is growing month over month.”
Technical details
Endpoint
GEThttps://councilof.ai/api/pop/mcp-registry?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a cryptographically signed, independently verified snapshot of MCP registry server names with full attestation metadata — not just a raw registry dump. It is ideal when auditability, tamper-evidence, and reproducibility matter, such as compliance checks, ecosystem audits, or any workflow that needs to verify the provenance of MCP server population data.
Side effects
- Payment not fulfilled — 402 response if x402 payment is not provided or insufficient
- Invalid method — only GET/HEAD/DELETE accepted; POST or PUT will be rejected
- Attestation signature may be null if the slice is an unsigned supporting run rather than an issued measurement card
- Stale data — as_of timestamp may lag real-time registry updates
- Registry source unavailable — upstream MCP registry fetch failure could result in stale or empty rows
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"n": 354,
"id": "mcp-registry",
"kind": "slice",
"rows": "<the population rows / artifact bytes, verbatim>",
"as_of": "2026-09-22T08:27:50Z",
"state": "INDEXED",
"n_unit": "own server names in the official MCP registry (one row per name, classified on isLatest=true)",
"schema": "csoai.population-door/0.1",
"settle": {
"payer": "<0x… or null>",
"network": "<caip2 or null>",
"transaction": "<0x… or null>"
},
"source": [
"/interop/mcp-registry-self-listings-2026-09-22.json",
"/interop/agent-population-2026-09-17.json"
],
"attestation": {
"schema": "https://councilof.ai/schema/card-v0.json",
"sha256": "<hex>",
"payload": {
"kind": "csoai.population.slice/0.1",
"rows_sha256": "<hex>"
},
"surface": "population.slice",
"sig_ed25519": "<hex or null>"
}
}
}Tags
x402
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