Council of AI Free API

openapi: 3.2.0
info:
  contact:
    email: nicholas@csoai.org
    name: CSOAI Ltd
    url: https://councilof.ai/
  description: 'Verification is free forever. Agents pay per artefact: issuance, assembly, cadence — never a grade. 22 axes measured · 14 model fleets · 3 public leader scores · 8 fact runs · TIE is TIE · not a certificate. Operations with security [] are free and unauthenticated. Operations with x-payment-info are x402 doors; an amount appears only inside a door''s 402 challenge (documented as each door''s 402 example).'
  license:
    name: CC-BY-4.0
    url: https://creativecommons.org/licenses/by/4.0/
  title: Council of AI — Public Free API
  version: 0.2+820f7aa0ad7a
  x-guidance: 'Free board: GET /api/gspc — quote totals.lid verbatim, never compose a count. Paid doors are the operations carrying x-payment-info: GET without payment answers HTTP 402 with the x402 v2 challenge (accepts[0]: scheme exact, network eip155:8453, USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, payTo 0x212686404A7D1E1fD88F35eD6200c3aF7A78ae31); pay it and retry with the X-PAYMENT header. Required query parameters carry an example that reaches the 402. Free previews are named per door under x-csoai.free_preview. Catalog: https://councilof.ai/.well-known/x402.json and https://councilof.ai/api/x402. Verify is free: https://councilof.ai/gspc-verify. Offer & Receipt emission is conditional: a 402 carries server-signed offers only when the Pages signing key is available; a settled 200 carries a signed receipt only when settlement exposes the required payer and transaction evidence and that key is available. The extension uses JWS/EdDSA, kid did:web:csoai.org#board-attestation-1, published at https://csoai.org/.well-known/did.json. Check either without trusting this document: POST it to /api/receipts/verify, or run scripts/verify_receipt.py, which reads did.json and contacts nobody. 22 axes measured · 14 model fleets · 3 public leader scores · 8 fact runs · TIE is TIE · not a certificate.'
servers:
- url: https://councilof.ai
tags:
- description: a 402 route priced at zero
  name: free
paths:
  /api/free-door:
    get:
      description: 'CSOAI free door: the live GSPC board totals and the public signed root, at a price of zero because it is free forever. That is the real price, not a promotion — a grade is never sold. Paid artefacts are catalogued at https://councilof.ai/api/x402. Measurement, not certification.'
      operationId: x402_free_door
      parameters: []
      responses:
        '200':
          content:
            application/json:
              schema:
                description: 'CSOAI free door: the live GSPC board totals and the public signed root, at a price of zero because it is free forever. That is the real price, not a promotion — a grade is never sold. Paid artefacts are catalogued at https://councilof.ai/api/x402. Measurement, not certification.'
                type: object
          description: 'CSOAI free door: the live GSPC board totals and the public signed root, at a price of zero because it is free forever. That is the real price, not a promotion — a grade is never sold. Paid artefacts are catalogued at https://councilof.ai/api/x402. Measurement, not certification.'
        '402':
          content:
            application/json:
              example:
                accepts:
                - amount: '0'
                  asset: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
                  csoai_pricing:
                    campaign_id: null
                    fresh_compute_excluded: true
                    normal_amount_atomic: '0'
                    offered_amount_atomic: '0'
                    pricing_basis: STANDARD
                    product_id: csoai.product.request_attestation
                    sku_id: request_attestation
                    tier: per_request
                  description: 'CSOAI free door: the live GSPC board totals and the public signed root, at a price of zero because it is free forever. That is the real price, not a promotion — a grade is never sold. Paid artefacts are catalogued at https://councilof.ai/api/x402. Measurement, not certification.'
                  extra:
                    decimals: 6
                    name: USD Coin
                    symbol: USDC
                    version: '2'
                  maxAmountRequired: '0'
                  maxTimeoutSeconds: 300
                  mimeType: application/json
                  network: eip155:8453
                  payTo: '0x212686404A7D1E1fD88F35eD6200c3aF7A78ae31'
                  resource: https://councilof.ai/api/free-door
                  scheme: exact
                error: Payment required
                extensions:
                  bazaar:
                    info:
                      input:
                        method: GET
                        type: http
                      output:
                        example:
                          board: https://councilof.ai/api/gspc
                          price_usdc: 0
                          root: https://councilof.ai/root.json
                          schema: csoai.free-door/0.1
                          verify: https://councilof.ai/gspc-verify
                        type: json
                    schema:
                      $schema: https://json-schema.org/draft/2020-12/schema
                      properties:
                        input:
                          additionalProperties: false
                          properties:
                            method:
                              enum:
                              - GET
                              type: string
                            type:
                              const: http
                              type: string
                          required:
                          - type
                          - method
                          type: object
                        output:
                          properties:
                            type:
                              type: string
                          required:
                          - type
                          type: object
                      required:
                      - input
                      type: object
                  offer-receipt:
                    info:
                      offers:
                      - acceptIndex: 0
                        format: jws
                        signature: eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6Y3NvYWkub3JnI2JvYXJkLWF0dGVzdGF0aW9uLTEifQ.eyJhbW91bnQiOiIwIiwiYXNzZXQiOiIweDgzMzU4OWZDRDZlRGI2RTA4ZjRjN0MzMkQ0ZjcxYjU0YmRBMDI5MTMiLCJuZXR3b3JrIjoiZWlwMTU1Ojg0NTMiLCJwYXlUbyI6IjB4MjEyNjg2NDA0QTdEMUUxZkQ4OEYzNWVENjIwMGMzYUY3QTc4YWUzMSIsInJlc291cmNlVXJsIjoiaHR0cHM6Ly9jb3VuY2lsb2YuYWkvYXBpL2ZyZWUtZG9vciIsInNjaGVtZSI6ImV4YWN0IiwidmFsaWRVbnRpbCI6MTc4OTMxNTE3NywidmVyc2lvbiI6MX0.lW-HS7lvIRiLxgPjAxxF7sRm-N__mBM-ZwJpwhd3jainz_LP-xj4UaVi47S4tMQc5cnqCsaOr6IWIEOP2YbOCw
                    schema:
                      $schema: https://json-schema.org/draft/2020-12/schema
                      properties:
                        offers:
                          items:
                            properties:
                              acceptIndex:
                                type: integer
                              format:
                                const: jws
                                type: string
                              signature:
                                description: JWS compact serialization containing the offer payload
                                type: string
                            required:
                            - format
                            - signature
                            type: object
                          type: array
                      required:
                      - offers
                      type: object
                resource:
                  description: 'CSOAI free door: the live GSPC board totals and the public signed root, at a price of zero because it is free forever. That is the real price, not a promotion — a grade is never sold. Paid artefacts are catalogued at https://councilof.ai/api/x402. Measurement, not certification.'
                  mimeType: application/json
                  serviceName: CSOAI Free Door
                  url: https://councilof.ai/api/free-door
                x402Version: 2
              schema:
                $ref: '#/components/schemas/X402PaymentRequired'
          description: Payment required — the x402 v2 challenge. The same JSON is base64-encoded in the PAYMENT-REQUIRED response header. Pay accepts[0] (scheme exact, network eip155:8453, USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, payTo 0x212686404A7D1E1fD88F35eD6200c3aF7A78ae31; amount in atomic units) and retry the same request with the X-PAYMENT header. Verification of the artefact stays free.
          headers:
            PAYMENT-REQUIRED:
              description: base64(JSON) of this challenge body
              schema:
                type: string
      summary: CSOAI Free Door
      tags:
      - free
      x-csoai:
        challenge:
          amount_source: captured live 402 (challenges/free_door.json)
          captured: true
          payment_required_header_bytes: 5380
        door: https://councilof.ai/api/free-door
        indexed_in: x402 Bazaar (PayAI)
        paid_for: null
      x-payment-info:
        protocols:
        - x402
components:
  schemas:
    X402PaymentRequired:
      properties:
        accepts:
          items:
            $ref: '#/components/schemas/X402Accept'
          minItems: 1
          type: array
        error:
          type: string
        extensions:
          description: extensions.bazaar carries info.input (a sample request) and schema (input/output JSON Schema). extensions['offer-receipt'].info.offers[] carries one server-signed offer per accepts[] entry, format 'jws' — a compact EdDSA JWS whose payload is the offer (x402 Offer & Receipt extension §4.1). It is present only when the edge holds its signing key; csoai.offer_receipt.signed says which, and why, on every 402.
          properties:
            offer-receipt:
              properties:
                info:
                  properties:
                    offers:
                      items:
                        properties:
                          acceptIndex:
                            description: unsigned convenience field; match offers to accepts[] by payload fields, never by index (§4.1.1)
                            type: integer
                          format:
                            const: jws
                            type: string
                          signature:
                            description: JWS compact serialization containing the offer payload
                            type: string
                        required:
                        - format
                        - signature
                        type: object
                      type: array
                  type: object
              type: object
          type: object
        resource:
          properties:
            description:
              type: string
            mimeType:
              type: string
            serviceName:
              type: string
            tags:
              items:
                type: string
              type: array
            url:
              type: string
          type: object
        x402Version:
          const: 2
          type: integer
      required:
      - x402Version
      - accepts
      type: object
    X402Accept:
      properties:
        amount:
          description: atomic units (x402 v2)
          pattern: ^[0-9]+$
          type: string
        asset:
          const: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
          description: USDC contract, 6 decimals
          type: string
        extra:
          description: EIP-712 domain of the asset
          properties:
            name:
              type: string
            version:
              type: string
          type: object
        maxAmountRequired:
          description: atomic units (x402 v1 name for the same figure)
          pattern: ^[0-9]+$
          type: string
        maxTimeoutSeconds:
          type: integer
        network:
          const: eip155:8453
          description: CAIP-2
          type: string
        payTo:
          const: '0x212686404A7D1E1fD88F35eD6200c3aF7A78ae31'
          type: string
        scheme:
          const: exact
          type: string
      required:
      - scheme
      - network
      - asset
      - payTo
      - amount
      - maxTimeoutSeconds
      type: object
  securitySchemes:
    ed25519:
      description: Ed25519 signature of canonical body, under did:web:csoai.org#card-attestation-1
      in: header
      name: X-CSOAI-Signed-Card
      type: apiKey
    githubOidc:
      bearerFormat: JWT
      description: GitHub Actions OIDC token satisfying the handler's issuer, audience, repository and workflow checks.
      scheme: bearer
      type: http
    operatorBearer:
      description: Operation-specific configured operator or writer credential. Not interchangeable across operations.
      scheme: bearer
      type: http
x-x402:
  amounts: only inside each resource's 402 challenge (accepts[].amount) — never on this catalog, never in prose
  asset:
    contract: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
    decimals: 6
    symbol: USDC
  catalog: https://councilof.ai/api/x402
  doors:
  - /api/free-door
  - /api/request-attestation
  - /api/evidence-bundle
  - /api/eunomia-data
  - /api/proof
  - /api/rwa/evidence
  - /api/wrapper
  - /api/art50/marking-evidence
  - /api/feeds/provider-diff
  - /api/receipts/batch
  facilitator:
    configured: true
    note: the facilitator URL is a Cloudflare Pages env var (X402_FACILITATOR_URL) that no public surface publishes; /api/x402 reports only whether one is configured
    url: null
  mcp: https://councilof.ai/mcp
  mode: live
  mode_note: A settled receipt (facilitator /verify then /settle) unlocks the paid artefact. Verification of every artefact stays free.
  network: eip155:8453
  not:
  - score
  - certificate
  - filled-cells
  - pay-to-pass
  - rank
  offer_receipt:
    alg: EdDSA
    did_document: https://csoai.org/.well-known/did.json
    formats_emitted:
    - jws
    formats_not_emitted:
    - eip712
    kid: did:web:csoai.org#board-attestation-1
    receipts_by_payer: https://councilof.ai/api/receipts?payer=0x…
    spec: https://github.com/x402-foundation/x402/blob/69652a69798f0b08f95bef33318896e36e210f7e/specs/extensions/extension-offer-and-receipt.md
    spec_commit: 69652a69798f0b08f95bef33318896e36e210f7e
    supported: true
    verify_hosted: https://councilof.ai/api/receipts/verify
    verify_offline: scripts/verify_receipt.py
    why_no_eip712: the edge holds one Ed25519 signing key (a Cloudflare Pages secret) and no secp256k1 signer; eip712 would require a key nobody has provisioned, so we emit none rather than a format we cannot produce
  payTo: '0x212686404A7D1E1fD88F35eD6200c3aF7A78ae31'
  public_operations: 104
  quarantined:
  - buyable: false
    free_status: https://councilof.ai/api/witness/status?sha256=<64-hex>
    lifecycle: QUARANTINED_PRE_RELEASE
    reason: paid witness issuance is disabled until a release gate verifies leaf → signed root → sidecar → Rekor → OpenTimestamps
    url: https://councilof.ai/api/witness?sha256=<64-hex>
  revenue_truth: https://councilof.ai/api/revenue
  schema_of_source:
    catalog: csoai.x402-catalog/0.2
    well_known: csoai.x402/0.2
  scheme: exact
  well_known: https://councilof.ai/.well-known/x402.json