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Council of AI — Population Layer 0 Slice
x402
Council of AI — Population Layer 0 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, cryptographically attested measurement slice of AI systems in 'layer0' of the CSOAI population estate, including live probe counts and source attestation data.
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
A JSON object containing: the number of live probes (n), the slice ID ('layer0'), kind, verbatim population rows, measurement timestamp (as_of), state ('MEASURED'), unit description, schema version, settlement info (payer, network, transaction), source artifact URLs, and a full attestation block with schema URL, sha256, payload, surface label, and an ed25519 signature (or null if unsigned).
Example use cases
Verifying AI benchmark integrity
“Fetch the signed Council of AI layer0 measurement card for me — I need the ed25519 attestation signature and sha256 hash so I can confirm the benchmark results haven't been tampered with.”
Monitoring live AI estate probe count
“How many live probes are currently in the Council of AI layer0 estate? Pull the latest measurement slice and tell me the count and the timestamp it was measured at.”
Auditing AI system behavior evidence
“Get me the Council of AI layer0 population slice including the source artifact paths and the settlement transaction info — I'm auditing the evidence trail for our compliance report.”
Technical details
Endpoint
GEThttps://councilof.ai/api/pop/layer0?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need machine-verifiable, cryptographically signed evidence of how AI systems behave on frozen published tests — specifically for the layer0 population slice. Prefer it over general AI leaderboards when auditability, non-repudiation, and independent re-verification of results are required. The ed25519 attestation and sha256 hashes allow any third party to re-check the measurement without trusting the issuer.
Side effects
- Payment not included or insufficient (HTTP 402) — must send 0.01 USDC via x402 protocol
- Measurement not yet settled — state may be pending rather than MEASURED
- Signature field null — supporting run rather than a fully signed card
- Source artifacts unavailable — /interop paths may not resolve
- Stale data — as_of timestamp may lag if ceremony has not run recently
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"n": 29,
"id": "layer0",
"kind": "slice",
"rows": "<the population rows / artifact bytes, verbatim>",
"as_of": "2026-09-03T05:10:26Z",
"state": "MEASURED",
"n_unit": "live probes of the estate's machine surface in the ceremony",
"schema": "csoai.population-door/0.1",
"settle": {
"payer": "<0x… or null>",
"network": "<caip2 or null>",
"transaction": "<0x… or null>"
},
"source": [
"/interop/layer0-ceremony-2026-09-03.json",
"/interop/ots/manifest.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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