{ "_schema_note": "vendor-specific NOMOS schema published by agentnomos.com; not an external standard", "binding_classes": { "A_request_to_challenge": "DETERMINISTICALLY_RECOMPUTABLE", "B_challenge_to_authorization": "DETERMINISTICALLY_RECOMPUTABLE", "C_authorization_to_settlement": "CRYPTOGRAPHICALLY_VERIFIABLE", "D_request_to_response": "OBSERVATIONAL", "E_settlement_to_response": "PROVIDER_ASSERTED", "F_result_to_independent_rpc": "OBSERVATIONAL" }, "capability": "outbound_paid_service_purchase", "chain_proof": "https://agentnomos.com/proof/x402-purchase/chain_proof_0x8e4ce54f.json", "claim_ceiling": "AUTHORIZATION_BOUND_SETTLEMENT_EVIDENCE", "claim_statement": "This receipt attests that a named outbound x402 'exact' purchase was challenged, authorized under EIP-3009 by a dedicated buyer identity, settled on Base in canonical USDC by a third-party relayer, and answered with HTTP 200, and that the settled Transfer and AuthorizationUsed events match the authorization we signed. It does NOT attest that the provider performed the computation itself, that the delivered bytes are cryptographically bound to the payment, or that the returned value is correct at any particular block.", "disclosures": { "intent_and_authorization": "OPERATOR_ATTESTED — no cryptographic intent digest was committed before execution", "operator_authorized": "this purchase was operator-authorized, value-capped by a hardcoded literal and executed once; it was NOT autonomous commerce", "request_to_response_binding": "NONE — the provider does not sign responses; the link is observational", "security_evidence": "ABSENT — no assessment was run on the counterparty before paying", "settlement_to_response_binding": "PROVIDER_ASSERTED — via the Payment-Response header only", "value_bearing_key_separation": "the x402 buyer wallet key is value-bearing secp256k1 material and is NOT the receipt signing key; the receipt signing key is Ed25519 attestation material that can move no value" }, "ecosystem": { "name": "x402", "network": "eip155:8453", "scheme": "exact", "scope_note": "demonstrated for ONE provider, ONE resource and ONE real run. No support is claimed for other x402 providers, other endpoints, the batch-settlement scheme, the tempo rail, or non-Base rails — all of which remain undemonstrated.", "version": "2" }, "evidence": "https://agentnomos.com/proof/x402-purchase/x402-purchase-evidence-onesource-20260814.json", "evidence_classes": { "authorization": "CRYPTOGRAPHICALLY_VERIFIABLE", "challenge": "DETERMINISTICALLY_RECOMPUTABLE", "delivery": "OBSERVATIONAL", "escrow": "ABSENT", "evaluation": "ABSENT", "intent": "OPERATOR_ATTESTED", "refund": "ABSENT", "result_verification": "OBSERVATIONAL", "security_evidence": "ABSENT", "settlement": "CRYPTOGRAPHICALLY_VERIFIABLE", "settlement_delivery_link": "PROVIDER_ASSERTED", "signed_receipt": "OPERATOR_ATTESTED" }, "evidence_schema": "agentnomos.x402.purchase_evidence.v1", "failed_paths": [], "generated_at": "2026-08-14T17:44:27Z", "maturity": { "external_network_reproducibility": { "achieved": true, "vantage": "operator-controlled host with independent public egress and DNS", "note": "verified from a separate host: egress 84.46.252.227 (production is 152.53.149.22), public DNS, no shared filesystem, no operator credentials and no key material; all inputs fetched over public HTTPS by following this discovery document" }, "independent_third_party": { "achieved": false, "note": "no party outside operator control has performed and published a verification. The external vantage above is network-independent but operator-controlled, which earns external network reproducibility and NOT independent third-party verification." }, "level": "L6_EXTERNALLY_NETWORK_REPRODUCIBLE", "standard": "NOMOS ecosystem admission standard v1, scoped per (ecosystem, capability)", "supported": false, "supported_note": "'supported' remains false: this is one demonstrated reference path, not a generally available capability a stranger may rely on" }, "not_claimed": [ "fully autonomous commerce — this purchase was operator-authorized, value-capped and single-shot", "generalized x402 support — one provider, one endpoint, one query; every other x402 capability remains L0", "compatibility with all x402 providers, schemes or rails (batch-settlement and tempo were disclosed and refused)", "cryptographic request-to-response binding — the provider does not sign responses", "exact-block reproducibility of the returned value — the response pins no block", "proof that the provider performed the computation itself rather than proxying it", "independent third-party verification", "public verifiability of this receipt — nothing in this family is published", "any refund or reversal path — x402 has none", "a security assessment of the counterparty before payment — none was performed" ], "not_supported": [ "other x402 providers", "other endpoints of this provider", "the batch-settlement scheme", "the tempo rail", "non-Base rails", "autonomous outbound purchasing without operator authorization", "refunds or reversal of any kind", "delegated purchasing on behalf of third parties" ], "public_keys": "https://agentnomos.com/.well-known/nomos-x402-receipt-jwks.json", "purpose": "everything a stranger agent needs to verify ONE outbound x402 paid-service purchase made by AgentNOMOS, from published evidence, without asking the operator", "receipt": "https://agentnomos.com/proof/x402-purchase/x402-purchase-receipt-onesource-20260814.json", "receipt_schema": "nomos.x402.purchase.receipt.v1", "reference_purchase": { "amount_raw_usdc": 3000, "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913", "economic_payer": "0x5d9a7d9c3b0b5f3ca6f6f53786ed2dfff0656586", "http_status": 200, "lifecycle": "402 challenge -> EIP-3009 authorization -> relayed settlement -> HTTP 200 delivery", "network": "eip155:8453", "pay_to": "0x52e29e0d2aa49bfbfc548c0a9f2196f4aa51f3ea", "provider_host": "api.onesource.io", "provider_name": "OneSource", "refund_path": "none — x402 has no refund; the payment is irreversible", "relayer_note": "EIP-3009 is relayed: tx.from is the relayer that paid gas, NOT the economic payer. Reading the payer from tx.from attributes the payment to the wrong address.", "request_method": "GET", "resource_url": "https://api.onesource.io/api/chain/erc20-balance?account=0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045&network=ethereum&token=0xdAC17F958D2ee523a2206206994597C13D831ec7", "settlement_block": 49966610, "settlement_relayer": "0x42dd53906b49c202e8e934b059dc019e04634b00", "settlement_status": "0x1", "settlement_tx": "0x8e4ce54faab48acaca179ce2281cddba05ab878de97cb91ced0eabecec4c0586" }, "result_verification": { "block_pinned_by_provider": false, "classification": "TEMPORALLY_CORROBORATED", "note": "the provider response pins no block, so exact-block equality was NOT demonstrated; the value matched an independent public Ethereum RPC before and after payment" }, "signing_key_purpose": "nomos_x402_purchase_receipt_signature_v1", "signing_kid": "x402r1_b8d21e5c8d689e6d", "verifier": { "all_modules_required": true, "entrypoint": "https://agentnomos.com/proof/x402-purchase/x402_receipt_verify.py", "expected_offline": "124 checks: 124 PASS, 0 FAIL, 0 NOT_RUN (exit 0)", "expected_with_chain_rpc": "133 checks: 133 PASS, 0 FAIL, 0 NOT_RUN (exit 0)", "modules": [ "https://agentnomos.com/proof/x402-purchase/x402_receipt_lib.py", "https://agentnomos.com/proof/x402-purchase/x402_keccak.py" ], "third_party_dependencies": "none required; 'cryptography' optional (absent => signature NOT_RUN, exit 2, never skipped)", "usage": "https://agentnomos.com/proof/x402-purchase/verify.md" }, "classification": "EXTERNALLY_REPRODUCIBLE_PUBLIC_X402_PURCHASE_EVIDENCE" }