Council of AI GSPC
https://councilof.ai/api/request-attestation?subject=model-or-subject-idIndependent AI-governance measurement MCP. Free reads + x402 evidence. Measurement not cert.
Paid verification
How it worksNo sponsored paid call yet.
Pay this endpoint once from your own wallet (Base USDC, up to $1.00) and we call it and record what came back. Your wallet pays the listed recipient directly; Agent Tools never holds funds. Sponsored checks prove delivery; they do not count as demand.
Quality grade
How grading works- ✓ Answers a real HTTP 402 challenge
- ✓ Publishes a /.well-known/x402 descriptor
- ✓ Payment address on record
- ✓ Settlement network declared
- ✓ Price declared
x402 readiness
Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here B, 55.4/100), which weighs availability, payability and on-chain demand. How the two differ
| Valid payment requirements | 10/10 | Payment requirements carry a payee, a mainnet network and a price. |
| Live 402 challenge | 20/25 | Endpoint reachable; its 402 challenge was seen earlier (1200 ms). |
| x402 version | n/a | x402 version not observed yet. |
| Signed descriptor | n/a | No x402 standard defines a signed descriptor. |
| Uptime (30 days) | 15/15 | 32/32 probes succeeded over 30 days (100%). |
| Resource declaration | 10/10 | Declares 32 paid resource(s). |
| Verified identity | 5/10 | Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control. |
| Freshness + modern flags | 3/5 | seen within 30 days; declares x402. |
| Security declaration | n/a | Payment is the access control for an x402 resource. |
Compared with peers
Against 10,082 reachable x402 APIs in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.
- Readiness
- Higher than 67% of peers
- This listing 84 · peer median 78
- Latency
- Faster than 5% of peers
- This listing 1,200 ms · peer median 205 ms
Where it loses the most points, and how to win them back
- Live 402 challenge −5
— Answer the paid path with a valid 402 challenge.
Now: Endpoint reachable; its 402 challenge was seen earlier (1200 ms).
- Verified identity −5
— Claim the listing and prove control of its domain.
Now: Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
- Freshness + modern flags −2
— Keep the listing current in the registry or source it comes from.
Now: seen within 30 days; declares x402.
Paid endpoints
32 resource(s) advertised by this origin. Each price below is that resource's own x402 price; the headline price is the range across them.
https://councilof.ai/api/coverage-evidence?asset=tether
$0.0200 / call
Coverage evidence: one assembled row for one named asset from the dated coverage record, not a live chain read. Returns identity, measurement state with method and measured_at, provenance digests, and this record's honest anchor state: evidence packs UNSIGNED (0 signed) until signing runs. States ex
https://councilof.ai/api/free-door
Live board totals and the signed public root, free: the axis totals and Merkle root, served through a real x402 settle. It reads nothing new: the totals are the board's own and the root is the published one. States: each axis MEASURED or UNMEASURED exactly as the board states it. Verification is fre
https://councilof.ai/api/discover/chainlink
Subject discovery links for Chainlink / LINK: identity, evidence routes, board and verify links. States: DISCOVERY_ONLY; the door reads nothing new and mints no measurement, and settling its zero-amount challenge charges nothing. Verification is free at /gspc-verify.
https://councilof.ai/api/discover/ondo
Subject discovery links for Ondo Finance / ONDO: identity, evidence routes, board and verify links. States: DISCOVERY_ONLY; the door reads nothing new and mints no measurement, and settling its zero-amount challenge charges nothing. Verification is free at /gspc-verify.
https://councilof.ai/api/discover/ondo-ousg
Subject discovery links for Ondo Finance OUSG on XRPL: identity, evidence routes, board and verify links. States: DISCOVERY_ONLY; the door reads nothing new and mints no measurement, and settling its zero-amount challenge charges nothing. Verification is free at /gspc-verify.
https://councilof.ai/api/request-attestation?subject=model-or-subject-id
$0.0200 / call
One named subject gets a card-v0 commission receipt, content-addressed, signed by did:web:csoai.org#board-attestation-1. Without that key: sig_ed25519:null, unsigned_reason. Check csoai.signer before paying. Paid reserve: up to 24 card-v1 references from dated /signed/card-matrix.json only; reserve_
https://councilof.ai/api/evidence-bundle?obligation=article-50&bundle=1
$0.0200 / call
OSCAL evidence bundle for one obligation: EU AI Act Article 50/53, DORA or EU-CRA. Returns selected card objects with signature fields, any retained inclusion proofs, an OSCAL wrapper and assembly manifest. Does not verify input-card signatures. Reports manifest signing status and any unsigned reaso
https://councilof.ai/api/signed-data-feed?feed=1
$0.0200 / call
Signed derivative data feed: the signed streams already on the public root, assembled into one document per request. Carries the signals index, the first-fine watch feed, the root and the card index, each block with its own signature and key id and its as_of read from the file. States: each stream a
https://councilof.ai/api/proof?bundle=1
$0.0200 / call
Inclusion proof bundle for leaves available in the last published Merkle root, read from that root. Each leaf comes with its hash, index and proof path, plus the root and the signed card count. States: included with a path, or absent from the root. Verification is free: recompute any path against /r
https://councilof.ai/api/rwa/evidence?asset=RLUSD
$0.0200 / call
RWA asset evidence: one signed card of one XRPL issued asset's on-ledger state, read live per request. Reads the AccountRoot flags, Domain, the two-way xrp-ledger.toml check and the gateway obligation, each raw fetch hashed. States: PROBED, UNCHECKABLE (an unreachable source is never a failure) or U
https://councilof.ai/api/wrapper?id=usdc.e:arbitrum
$0.0200 / call
Wrapped-asset parity evidence: one signed card of one bridged or wrapped token pair, read live from public RPC. Reads the wrapped totalSupply and the origin-chain bridge-escrow balance at finalized blocks whose hash a second RPC operator confirmed, raw reads hashed. States: ESCROW_PARITY_READ, UNCHE
https://councilof.ai/api/wrapper/changes?id=usdc.e:arbitrum
$0.0200 / call
Wrapped-asset parity evidence: change record for one pair between the two latest published ledger snapshots. Returns per-field deltas of wrapped supply, escrow balance and ratio, with both snapshot dates read from the files. States: DELTA_READ, or UNCHECKABLE when only one snapshot exists. Free prev
https://councilof.ai/api/wrapper/asset/usdc
$0.0200 / call
Wrapped-asset parity evidence for USDC: every roster pair of that asset, read live in one request. One signed card per pair: wrapped supply, escrow balance where an escrow exists, finalized blocks whose hash a second RPC operator confirmed. States per pair: ESCROW_PARITY_READ, UNCHECKABLE_NATIVE_ISS
https://councilof.ai/api/wrapper/asset/usdt
$0.0200 / call
Wrapped-asset parity evidence for USDT: every roster pair of that asset, read live in one request. One signed card per pair: wrapped supply, escrow balance where an escrow exists, finalized blocks whose hash a second RPC operator confirmed. States per pair: ESCROW_PARITY_READ, UNCHECKABLE_NATIVE_ISS
https://councilof.ai/api/wrapper/asset/dai
$0.0200 / call
Wrapped-asset parity evidence for DAI: every roster pair of that asset, read live in one request. One signed card per pair: wrapped supply, escrow balance where an escrow exists, finalized blocks whose hash a second RPC operator confirmed. States per pair: ESCROW_PARITY_READ, UNCHECKABLE_NATIVE_ISSU
https://councilof.ai/api/art50/marking-evidence?url=https://councilof.ai/og-image.png
$0.0200 / call
Art. 50 marking evidence: one signed pack for one generative output at a named URL, measured from its bytes. Detects C2PA and IPTC metadata only (C2PA manifest, assertion hashes, hard binding, claim signature; IPTC digitalSourceType); no watermark is read. States: DETECTED, NOT_DETECTED (not proof t
https://councilof.ai/api/feeds/provider-diff?history=1
$0.0200 / call
Provider change record: the signed history of document changes the daily watcher recorded for tracked model providers. Each diff leaf comes with its Merkle inclusion proof, assembled per request. States: each diff exactly as the watcher recorded it; the latest state per provider is free at the same
https://councilof.ai/api/receipts/batch?from=2026-01-01T00:00:00Z
$0.0200 / call
Historical measurement-card batch from published roots for a requested time window, capped at 200 leaves. Each signed card-v0 leaf comes with its inclusion path and the root that carried it. States: the leaves found in the window, or an empty batch stated as empty. Not payment or settlement receipts
https://councilof.ai/api/measurement/fresh-capsule
$0.0200 / call
Fresh measurement capsule: re-measures one declared-vs-observed claim about one MCP endpoint, live. Compares the endpoint's own discovery documents with its initialize and tools/list answers for TOOLS, VERSION or PROTOCOL, each read hashed; no tool is ever called. States: CONSISTENT, INCONSISTENT, o
https://councilof.ai/api/pop/stablecoins
$0.0200 / call
Stablecoin universe slice: every asset the frozen discovery index catalogues, read from the published artifact. Carries each reader's per-chain deployment reads and every unmeasured asset's own reason. Assets, never supply; a read, not a reserve attestation. States: INDEXED, UNCHECKABLE or UNMEASURE
https://councilof.ai/api/pop/swift
$0.0200 / call
SWIFT-linked bank census slice: every bank named in a dated public notice about the Swift digital-asset MVP. Each row keeps its notice's own wording (LIVE, COMMITTED, DISCOVERED) and a hashed press URL; mixed identity by design, never a client list. States: INDEXED, UNCHECKABLE or UNMEASURED, with n
https://councilof.ai/api/pop/xrpl
$0.0200 / call
XRPL issued-asset slice: the assets whose signed xrpl.asset.state card sits on the current public root. Read from the live reader, with the issuer registry artifact beside it and never merged. States: INDEXED, UNCHECKABLE or UNMEASURED (a reader that cannot find the locked set is UNMEASURED, never z
https://councilof.ai/api/pop/x402-bazaar
$0.0200 / call
x402 Bazaar listings slice: the payable resources the two public discovery indexes catalogue, from the census artifact. Counted within each frame, with the overlap published, plus the estate's own door census. Appearing in an index is not delivery. States: INDEXED, UNCHECKABLE or UNMEASURED, with n
https://councilof.ai/api/pop/mcp-registry
$0.0200 / call
MCP registry listings slice: every server name the estate publishes in the official registry, from the census artifact. Each is classified on its latest version, beside the registry's full-walk census and the effect-binding server probe's counts. Distribution, not adoption. States: INDEXED, UNCHECKA
https://councilof.ai/api/pop/a2a
$0.0200 / call
A2A registry population slice: the agents enumerable without a credential from the public A2A registry frame. Counted within that frame, with the estate's own directory-listing state beside it; a frame count, not a global count. States: INDEXED, UNCHECKABLE or UNMEASURED, with n and as_of read at re
https://councilof.ai/api/pop/ots-proofs
$0.0200 / call
OpenTimestamps proof manifest slice: every published .ots proof of an estate artifact, each state read from its bytes. Rows are Bitcoin-attested, calendar-pending or subject absent; a pending proof is not anchored. States: MEASURED when the rows agree with the manifest, else UNCHECKABLE, or UNMEASUR
https://councilof.ai/api/pop/layer0
$0.0200 / call
Layer-0 ceremony slice: every rail and probe of the estate's own machine surface at the ceremony's as_of. Carries the HTTP status each returned and the ceremony artifact's .ots state; self-attestation, dated. States: INDEXED, UNCHECKABLE or UNMEASURED, with n and as_of read at request time. Free pre
https://councilof.ai/api/pop/corrections
$0.0200 / call
Corrections ledger slice: the same entries as free /api/corrections, packaged with per-entry digests. Each entry states what was wrong, how it was caught, the fix and the date; /api/corrections stays free. States: INDEXED, UNCHECKABLE or UNMEASURED, with n and as_of read at request time. Free previe
https://councilof.ai/api/pop/claim-watch
$0.0200 / call
Claim-maintenance registries slice: each published registry of a vendor's public claims, captured verbatim. Each claim is hashed, source-cited and paired with a measurement plan; file digest, reproducibility and .ots state are read from bytes. CLAIM_CAPTURED, never a claim of falsity. States: INDEXE
https://councilof.ai/api/ras/mcp-probe?url=https://councilof.ai/mcp
$0.0200 / call
MCP discovery probe receipt: one live, read-only discovery of a public https MCP endpoint, signed. Runs server/discover, else initialize and tools/list, and never calls a tool: protocol version requested and negotiated, tool count, tool-names sha256. States include LISTED, PARTIAL, AUTH_REQUIRED, NO
https://councilof.ai/api/ras/x402-check?url=https://councilof.ai/api/free-door
$0.0200 / call
x402 challenge conformance receipt: one live GET of a public x402 resource, checked and signed. The rule is the daily census's: HTTP 402, a PAYMENT-REQUIRED header, x402Version 2 and extensions.bazaar in the body. States: CONFORMANT, NOT_CONFORMANT, TIMEOUT, UNREACHABLE or BLOCKED, delivered as foun
https://councilof.ai/api/ras/supply?asset=USDC&ledger=ethereum
$0.0200 / call
Token supply read receipt: one fresh totalSupply() read of an issuer-listed EVM deployment, signed. The address is parsed from the issuer's own page on the request (USDC). States: STATE_PROOF_VERIFIED on Ethereum (EIP-1186 proof checked against the block stateRoot), OPERATOR_API elsewhere, or UNCHEC
How to call
curl -sS -i -X GET 'https://councilof.ai/api/request-attestation?subject=model-or-subject-id' # expect HTTP 402 Payment Required (about 0.02 USDC/call)
https://councilof.ai/mcp
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