Council of AI — Measurement Agent
Independent AI-governance MEASUREMENT body. Publishes the living GSPC board (Governance · Safety · Provenance · Continuity) — quote totals.lid and totals.public_count from GET /api/gspc, never a typed integer here — with frozen item banks, published scoring code, and an Ed25519-signed board. Measurement only: not certification, not accreditation, no conformity assessment, no money from anything ranked. A2A v1.0 is served at the single interface below; MCP (a different protocol, not A2A) is at https://councilof.ai/mcp.
AgentCard object. It is an agent card in spirit rather than in schema — useful for
discovery, but an A2A client cannot assume it will parse.
no-protocolVersionNo securitySchemes/security declared — consistent with an anonymous JSON-RPC endpoint; paid skills are gated by x402 payment, not by authentication.Non-standard top-level fields catalogUrl, doi and explicitly_not (provider extensions; harmless).The A2A interface keeps no task store, so GetTask/CancelTask always return TaskNotFoundError and ListTasks/SubscribeToTask/GetExtendedAgentCard return UnsupportedOperationError, as the GET /api/a2a document states. Every SendMessage answers with a Message.The declared signed-receipts extension is self-described as not yet emitted.
An A2A client finds this agent by fetching the well-known path on the provider's own host. That is what makes an agent card different from every other agent artifact in this catalog: it is provider-published by construction — it cannot be derived, generated, or reconstructed on a provider's behalf.
https://councilof.ai/api/a2a
· transport JSONRPC
non-standard supportedInterfaces
Signed GSPC Board gspc-board
SendMessage answers with the live board: totals.lid verbatim from GET /api/gspc and the derived axis rows (axis, family, kind, status, n, separation, leader state). Empty cells stay empty; a withheld leader is a state, not a zero; a fetch failure is UNCHECKABLE, never a fabricated number. Live JSON, recomputable from published rows.
measurementgovernanceverificationEast-West crosswalk & cross-border card east-west-crosswalk
One signed GSPC measurement mapped across EU, UK, US, Illinois, and China GB/T alignment surfaces. Crosswalk v1 JSON, cross-border signed card, and stranger verify at /gspc-verify. Measurement only — determination stays with authorities.
cross-bordercrosswalkmeasurementverificationMeasured Badge measured-badge
A global-board README link plus a card-bound status badge. The global board never becomes a model score. A model-specific score may render only from a VALID signed cell that names the exact subject and immutable revision; otherwise the subject is UNMEASURED or UNSIGNED.
measurementgovernanceverificationBenchmark-quality register benchmark-quality-register
Signed register of what third-party AI benchmarks disclose about their own process integrity. Deterministic predicates only — no language model judges. Records are unsolicited; nothing on the register is certification or endorsement.
meta-evaluationbenchmark-qualityreproducibilitygovernanceArticle 50 provenance detection (free) article50-detect
Verify a C2PA-style signed manifest for AI-generated content (EU AI Act Article 50) at POST https://councilof.ai/api/detect. Deterministically checks the Ed25519-signed metadata layer and the IPTC/schema.org digitalSourceType; returns AI_MARKED / NOT_AI_MARKED / UNVERIFIABLE with a signed verdict receipt (in-toto/DSSE when a board key is bound). The imperceptible-watermark layer we cannot see is declared, never claimed. Free for all; unrestricted for authorities, media, fact-checkers, researchers and civil society. Not certification.
article-50provenancedetectionverificationc2paEU AI Act screening helper (deterministic, text-only) eu-ai-act-screen
POST https://councilof.ai/api/assess with a system description. Keyword matches name the Annex III categories and Article 5 patterns a human should inspect; no model is consulted. It does not establish legal tier, applicability, exceptions or compliance, and an empty description is UNMEASURED, not a low-risk finding. When no signing key is provisioned the report says UNSIGNED out loud.
eu-ai-actscreeningdeterministicx402 discovery + free door x402-discovery
Agents discover paid artefact rails via GET https://councilof.ai/.well-known/x402.json (mode is reported from runtime env, Base eip155:8453, USDC; amounts from challenge only — no invent price). Catalog GET /api/x402. Free door GET /api/free-door amount 0 settles and charges nothing — proves the rail. Living board GET /api/gspc. Verification stays free at /gspc-verify. payTo is merchant receive, never the signer. Self-settle proves the rail; stranger revenue is separate (do not invent buyers). Coming—Paddle not live. No card-processor invent. Measurement, never certification. Signed offers and receipts are conditional: a 402 carries extensions['offer-receipt'].info.offers[] only when BOARD_SIGN_KEY_PKCS8_B64 is provisioned and an accepts[] entry can be committed; otherwise csoai.offer_receipt names the gap. A signed receipt appears in the X-PAYMENT-RESPONSE SettlementResponse only after facilitator-confirmed settlement when the facilitator names a payer and the board key is available; otherwise receiptGap states why no signed receipt was attached. Emitted signatures use format jws, alg EdDSA, kid did:web:csoai.org#board-attestation-1. Verify one without trusting us: POST it to /api/receipts/verify, or run scripts/verify_receipt.py against https://csoai.org/.well-known/did.json. Your own receipts: GET /api/receipts?payer=0x... (status UNRECORDED means no store is bound on that deployment, never that you did not pay). No eip712 is emitted — the edge has no secp256k1 signer.
x402discoverypaymentsmeasurementEstate index (census, not evidence) estate-index
SendMessage answers with the estate census summary from GET /api/state -> estate_index, and the full index is GET /interop/master-consolidation-2026-09-16.json with its OpenTimestamps proof beside it. Every artefact CSOAI holds across this repository, Hugging Face, GitHub, Kaggle and Oracle Object Storage, committed to one Merkle root. Read it as a census, never as evidence: INDEXED means we found the artefact and measured nothing against it, and UNSIGNED means a card body exists carrying signature: null awaiting a signing decision. Two leaf classes sit under the root and are never added together: a bytes leaf is the sha256 of an artefact we read, a record leaf is the sha256 of our own note about a remote artefact we did not download and proves nothing about the remote bytes. The root is UNSIGNED, so it records when the set existed and not who assembled it, and it is therefore not Rekor-witnessable the way public/root.json is. It does not replace root.json or the signed card index, each of which commits to its own separate corpus with zero identifier overlap. Some identifiers are withheld because they carry internal names; those entries are kept and their digests untouched, so inclusion can still be proved by a holder of the real identifier. Measurement, never certification.
censusprovenancemerklemeasurement2026-09-19 from https://councilof.ai/.well-known/agent-card.json,
HTTP 200. The body was saved verbatim and is the sole source for
everything on this page — no field is inferred.
View the captured card.
Providers change what they serve; if this card has moved or changed shape,
the provider profile carries the
current state as of the last build.
Work with this as data
Every agent card here is available over the APIs.io API and to AI agents over MCP. A2A Agent Cards is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.