Council of AI GSPC

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    "x402Version": 2
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  {
    "csoai": {
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      "per": "request",
      "rail": {
        "mode": "live",
        "note": "A settled receipt (facilitator /verify then /settle) unlocks the paid artefact. Verification of every artefact stays free.",
        "pay_to_configured": true,
        "facilitator_configured": true
      },
      "never": [
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        "grade",
        "score-sale"
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      "catalog": "https://councilof.ai/api/x402",
      "explainer": "https://councilof.ai/pricing",
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        "reason": "1 of 1 accepts entries signed",
        "signed": true,
        "verify": "base64url-decode the JWS payload part, fetch https://csoai.org/.well-known/did.json, take the publicKeyJwk.x of the verificationMethod whose id equals the header kid, and verify Ed25519 over `header.payload`. POST the compact string to /api/receipts/verify to have us do it, or run scripts/verify_receipt.py to do it without us.",
        "extension": "offer-receipt",
        "spec_commit": "69652a69798f0b08f95bef33318896e36e210f7e"
      },
      "not_paid_reason": "no x-payment header"
    },
    "error": "Payment required",
    "accepts": [
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        "measurement",
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      ],
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      "serviceName": "CSOAI Request Attest"
    },
    "extensions": {
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            "queryParams": {
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                "status": "COMMISSIONED",
                "reserve": [],
                "fresh_run": "UNMEASURED"
              },
              "subject": "model-or-subject-id",
              "surface": "ras.commission",
              "unmeasured": [
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    "x402Version": 2
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]