{
  "schema": "varexis-public-evidence-record/0.3",
  "generated_at_utc": "2026-10-24T21:35:02.243Z",
  "record_id": "VXI-EXT-PROCUREMENT-X402-RECEIPT-ISSUER-AUTHORITY-AT-ISSUANCE-01-v1",
  "record_kind": "external_reference",
  "title": "x402 receipt keys and historical authority",
  "system": "x402 Foundation",
  "evidence_family": "vendor_evidence_review",
  "index_status": "PUBLIC_SAFE_SOURCE_REVIEW",
  "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY",
  "canonical_question": "Does a valid x402 receipt signature prove that its key was authorised for the service when issued?",
  "near_questions": [
    "How is an x402 receipt assessed after key rotation?",
    "Does removing an x402 key invalidate all earlier receipts?",
    "What proves authority to sign for an x402 service?",
    "Can signature validity establish historical merchant authority?"
  ],
  "supported_claims": [
    {
      "claim": "The reviewed extension distinguishes signature validity from authority to sign for the resource URL. Historical verification should evaluate authority at receipt issuance. Removing a key from a current authorization source does not by itself establish that it was unauthorised earlier; dated authority evidence is therefore relevant.",
      "reliance": "DOCUMENTED_CAPABILITY_ONLY"
    }
  ],
  "not_demonstrated_claims": [
    "Independent verification of payment, delivery or deployed controls",
    "Actual key ownership, authority and receipt truth have not been independently checked.",
    "Buyer deployment testing, live runtime enforcement, certification or permission to act",
    "Expanded capabilities or licences for existing INDEX executables"
  ],
  "public_summary": "The reviewed extension distinguishes signature validity from authority to sign for the resource URL. Historical verification should evaluate authority at receipt issuance. Removing a key from a current authorization source does not by itself establish that it was unauthorised earlier; dated authority evidence is therefore relevant.",
  "related_record_ids": [],
  "source_review": {
    "source_type": "official_external_documentation",
    "source_title": "Offer and Receipt Extension",
    "source_url": "https://raw.githubusercontent.com/x402-foundation/x402/4241d56cae2fb7ed06cd18e3a9ff2a3457b1ce54/specs/extensions/extension-offer-and-receipt.md",
    "checked_on": "2026-10-24",
    "candidate_record_id": "VXI-EXT-PROCUREMENT-X402-RECEIPT-ISSUER-AUTHORITY-AT-ISSUANCE-01-v1",
    "candidate_record_sha256": "76bd845dd2ea8cd756a822edeccea68add5d4b4627a9e0cc840099e4389fc13c",
    "method": "Primary documentation reviewed for the published bounded statement.",
    "deployment_tested_by_varexis": false,
    "revalidation": "The delivered snapshot preserves the review date shown. Recheck current primary documentation and deployment context before relying on present applicability; payment does not trigger fresh research."
  },
  "answer_policy": {
    "classification": "DOCUMENTED_WITH_DEPLOYMENT_BOUNDARY",
    "bounded_answer": "The reviewed extension distinguishes signature validity from authority to sign for the resource URL. Historical verification should evaluate authority at receipt issuance. Removing a key from a current authorization source does not by itself establish that it was unauthorised earlier; dated authority evidence is therefore relevant.",
    "required_buyer_context": "Receipt payload and signature; Resource URL and issuance time; Dated signer-authority evidence. Buyer deployment not inspected.",
    "missing_evidence": "A broader claim needs evidence matching the intended use. Payment does not upgrade the evidence state."
  },
  "private_boundary": "Raw logs, thresholds, private paths, source code, protected mechanisms and reconstruction-level details are excluded from public and paid delivery.",
  "decision_profile": {
    "schema": "varexis-vendor-evidence-review/1",
    "review_status": "documentation_review_only",
    "checked_on": "2026-10-24",
    "claim_to_check": "Does a valid x402 receipt signature prove that its key was authorised for the service when issued?",
    "documented_statement": {
      "status": "documented",
      "statement": "The reviewed extension distinguishes signature validity from authority to sign for the resource URL. Historical verification should evaluate authority at receipt issuance. Removing a key from a current authorization source does not by itself establish that it was unauthorised earlier; dated authority evidence is therefore relevant.",
      "source_ids": [
        "x402-offer-receipt"
      ]
    },
    "review_inference": {
      "status": "review_inference",
      "statement": "Retain evidence needed to assess commercial receipts after signing-key rotation. This is a review decision, not an observed buyer result.",
      "source_ids": [
        "x402-offer-receipt"
      ]
    },
    "buyer_evidence_required": [
      "Receipt payload and signature",
      "Resource URL and issuance time",
      "Dated signer-authority evidence"
    ],
    "review_condition": {
      "status": "varexis_review_policy",
      "statement": "Do not equate a valid signature or current key list with historical service authority."
    },
    "unknowns": "Actual key ownership, authority and receipt truth have not been independently checked.",
    "unknown_finding": {
      "status": "unknown",
      "statement": "Actual key ownership, authority and receipt truth have not been independently checked."
    },
    "evidence_sources": [
      {
        "source_id": "x402-offer-receipt",
        "url": "https://raw.githubusercontent.com/x402-foundation/x402/4241d56cae2fb7ed06cd18e3a9ff2a3457b1ce54/specs/extensions/extension-offer-and-receipt.md",
        "final_url": "https://raw.githubusercontent.com/x402-foundation/x402/4241d56cae2fb7ed06cd18e3a9ff2a3457b1ce54/specs/extensions/extension-offer-and-receipt.md",
        "status": 200,
        "captured_at_utc": "2026-10-24T21:23:35.715Z",
        "sha256": "51151bd2b7dd174bc4a44b712234c074e45ca6c752c44ce077a94a4d97596ae9",
        "bytes": 41408,
        "title": "Offer and Receipt Extension",
        "hash_basis": "Decoded HTTP response body bytes",
        "rights_review": "Original factual paraphrase and source metadata only; Apache-2.0 repository captures retained privately and not redistributed.",
        "checked_on": "2026-10-24",
        "capture_status": 200,
        "claim_review_completed": true,
        "reviewed_sections": [
          "4.1.1 acceptIndex Handling",
          "4.5.1 Signer Authorization",
          "5.5 Receipt Verification",
          "5.2 Receipt Payload Fields",
          "11. Privacy Considerations"
        ],
        "version_context": "Pinned x402-foundation/x402 revision 4241d56cae2fb7ed06cd18e3a9ff2a3457b1ce54 captured 2026-10-24. Documentation revision, not evidence that any buyer deployment conforms."
      }
    ],
    "observed_deployment": false,
    "commercial_reliance_boundary": "Documentation review only; the buyer must establish applicability and actual outcomes. INDEX does not inspect or control the deployment.",
    "paid_value": {
      "decision_context": "Retain evidence needed to assess commercial receipts after signing-key rotation.",
      "free": "Complete review, sources, practical questions and limitations; may be saved locally.",
      "single_request": "Existing server-saved version-bound route snapshot for later authenticated retrieval.",
      "evidence_receipt": "The same snapshot plus the existing unsigned delivery receipt.",
      "excluded": [
        "Fresh vendor research",
        "Continuous monitoring or change alerts",
        "Testing the buyer configuration",
        "Private evidence or vendor certification"
      ],
      "integrity": "Hashes identify content versions; they do not prove truth or provide a signature."
    },
    "revalidation": {
      "trigger": "A saved purchase does not recheck the source or buyer configuration.",
      "specific_watch": "Recheck the pinned specification against the selected scheme, network, provider version and buyer evidence before relying on a current outcome."
    },
    "buyer_relevance": "Retain evidence needed to assess commercial receipts after signing-key rotation.",
    "refusal_conditions": [
      "Do not equate a valid signature or current key list with historical service authority."
    ]
  },
  "niche": {
    "niche_id": "agent-authority-action-evidence",
    "label": "Agent Authority & Action Evidence",
    "classification_id": "payments",
    "classification_label": "Agent Payments, Authority & Transaction Evidence",
    "topic_id": "payments",
    "buyer_intent": "Retain evidence needed to assess commercial receipts after signing-key rotation.",
    "comparison_role": "supplementary_discovery"
  },
  "paid_access_note": "The full published answer and boundaries are free. Paid access saves the selected route and source versions, with an unsigned receipt when purchased. Preview coverage before paying. Fresh research, bespoke assessment and protected evidence are excluded.",
  "service_route": {
    "request_guide": "/varexis-index/request.html",
    "request_workflow": "/varexis-index/request-workflow.json",
    "service_id": "single_request",
    "service_routes_url": "/varexis-index/service-routes.json",
    "payment_required": true,
    "availability_endpoint": "/api/index/capabilities",
    "operational_status": "AUTOMATIC_SERVICE_CAPABILITIES_GATED",
    "checkout_url": "/index-access"
  },
  "authority_boundary": "VAREXIS-INDEX informs evidence reliance. It does not provide advice, certification, deployment authority, security assurance, production approval, or guarantee.",
  "human_page": "/varexis-index/catalog.html#x402-receipt-issuer-authority-at-issuance",
  "machine_readable_record": "/varexis-index/records/x402-receipt-issuer-authority-at-issuance.json"
}