Council of AI Signed Data Feed

x402

Council of AI Signed Data Feed is a paid API for AI agents from councilof.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).

Returns a signed, cryptographically verifiable feed of AI system measurement results, including benchmark cards, signal blocks, and a corrections ledger.

Price / call$0.01

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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 feed (schema csoai.signed-data-feed/0.2) containing a root block, signal blocks, a card index, and first-fine-watch events. Measurement cards within the feed are cryptographically signed; supporting runs are labelled as unsigned. The feed represents the live state of AI system benchmarks as independently measured and published by Council of AI.

Example use cases

Verifying AI benchmark claims

“I need to check whether a vendor's claimed AI benchmark scores are backed by cryptographically signed, independently published evidence — can you pull the Council of AI signed feed and look up their measurement cards?”

Monitoring AI corrections ledger

“Check the Council of AI signed data feed for me and tell me if there are any new entries in the corrections ledger since the last time we looked — I want to know if any prior AI measurement cards have been revised.”

Auditing AI system behavior for compliance

“Fetch the latest Council of AI measurement feed so I can review the signal blocks and card index — I need to document which AI systems have verifiable, signed evaluation results for our compliance report.”

Technical details

Endpoint

GEThttps://councilof.ai/api/signed-data-feed?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need independently signed, cryptographically verifiable evidence of AI system behavior — not self-reported vendor benchmarks. It is the right choice for compliance auditing, fact-checking AI capability claims, or monitoring the corrections ledger for revised evaluations. Prefer it over generic leaderboards when tamper-evidence and checkable provenance matter.

Side effects

Payment not provided or insufficient USDC — HTTP 402 returned
Endpoint unavailable or feed generation failure — HTTP 5xx returned
Schema version mismatch if client expects a different csoai.signed-data-feed version
Signature verification failure on client side if signing keys are not up to date
Empty or incomplete blocks if no new measurements have been published

Output

Schema · Response

{
  "type": "json",
  "example": {
    "kind": "feed",
    "blocks": {
      "root": {},
      "signals": {},
      "card_index": {},
      "first_fine_watch": {}
    },
    "schema": "csoai.signed-data-feed/0.2"
  }
}

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