{"uid":"cap_WHNtB_HjJJuzz3DQNUOur","slug":"council-of-ai-signed-data-feed-1a22dae7","name":"Council of AI Signed Data Feed","description":"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.","url":"https://councilof.ai/api/signed-data-feed?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":null,"responseSchema":{"type":"json","example":{"kind":"feed","blocks":{"root":{},"signals":{},"card_index":{},"first_fine_watch":{}},"schema":"csoai.signed-data-feed/0.2"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_THlajwOXf1jqnJFXmNStI","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a signed, cryptographically verifiable feed of AI system measurement results, including benchmark cards, signal blocks, and a corrections ledger.","exampleAgentPrompt":"Pull the latest signed data feed from Council of AI so I can see the current measurement cards, signal blocks, and any corrections logged for AI system evaluations.","exampleUseCases":[{"title":"Verifying AI benchmark claims","prompt":"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?"},{"title":"Monitoring AI corrections ledger","prompt":"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."},{"title":"Auditing AI system behavior for compliance","prompt":"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."}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-17T18:34:45.396Z","isFirstParty":false,"canonicalSlug":"council-of-ai-signed-data-feed-1a22dae7"}