{ "schema": "varexis-index-free-publication-preview/1", "catalogue_version": "pub-1-tranche-51-v1", "route_id": "agentic_reviewed_x402_upto_maximum_versus_final_charge", "record_id": "VXI-EXT-PROCUREMENT-X402-UPTO-MAXIMUM-VERSUS-FINAL-CHARGE-01-v1", "question": "Does the x402 upto amount mean the same thing during verification and settlement?", "answer": "For the reviewed upto scheme, verification-time amount is the authorised maximum and settlement-time amount is the actual charge. The actual amount cannot exceed the signed maximum and may be zero. The facilitator must verify the signature against the original authorised maximum rather than the later charge.", "records": [ { "record_id": "VXI-EXT-PROCUREMENT-X402-UPTO-MAXIMUM-VERSUS-FINAL-CHARGE-01-v1", "url": "/varexis-index/records/x402-upto-maximum-versus-final-charge.json", "content_sha256": "aa95e96ac5d3b7fee38832e045bd966f1b993c5463e416497190790bb34f570f", "evidence": { "schema": "varexis-public-evidence-record/0.3", "generated_at_utc": "2026-10-24T21:35:02.243Z", "record_id": "VXI-EXT-PROCUREMENT-X402-UPTO-MAXIMUM-VERSUS-FINAL-CHARGE-01-v1", "record_kind": "external_reference", "title": "x402 metered ceilings and final charges", "system": "x402 Foundation", "evidence_family": "vendor_evidence_review", "index_status": "PUBLIC_SAFE_SOURCE_REVIEW", "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY", "canonical_question": "Does the x402 upto amount mean the same thing during verification and settlement?", "near_questions": [ "Is an x402 upto spending limit the final bill?", "Can x402 upto settle less than its authorised maximum?", "Which amount should verify an x402 upto signature?", "How do metered x402 charges relate to the signed ceiling?" ], "supported_claims": [ { "claim": "For the reviewed upto scheme, verification-time amount is the authorised maximum and settlement-time amount is the actual charge. 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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": "For the reviewed upto scheme, verification-time amount is the authorised maximum and settlement-time amount is the actual charge. The actual amount cannot exceed the signed maximum and may be zero. The facilitator must verify the signature against the original authorised maximum rather than the later charge.", "required_buyer_context": "Signed maximum amount and asset units; Measured usage and agreed price calculation; Actual settlement amount and original authorization. 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 the x402 upto amount mean the same thing during verification and settlement?", "documented_statement": { "status": "documented", "statement": "For the reviewed upto scheme, verification-time amount is the authorised maximum and settlement-time amount is the actual charge. The actual amount cannot exceed the signed maximum and may be zero. The facilitator must verify the signature against the original authorised maximum rather than the later charge.", "source_ids": [ "x402-upto" ] }, "review_inference": { "status": "review_inference", "statement": "Reconcile metered usage to a bounded authorisation without confusing the ceiling with the invoice amount. This is a review decision, not an observed buyer result.", "source_ids": [ "x402-upto" ] }, "buyer_evidence_required": [ "Signed maximum amount and asset units", "Measured usage and agreed price calculation", "Actual settlement amount and original authorization" ], "review_condition": { "status": "varexis_review_policy", "statement": "Do not report the authorised ceiling as the amount actually paid." }, "unknowns": "Usage measurement accuracy and the buyer actual charge are not independently established.", "unknown_finding": { "status": "unknown", "statement": "Usage measurement accuracy and the buyer actual charge are not independently established." }, "evidence_sources": [ { "source_id": "x402-upto", "url": "https://raw.githubusercontent.com/x402-foundation/x402/4241d56cae2fb7ed06cd18e3a9ff2a3457b1ce54/specs/schemes/upto/scheme_upto.md", "final_url": "https://raw.githubusercontent.com/x402-foundation/x402/4241d56cae2fb7ed06cd18e3a9ff2a3457b1ce54/specs/schemes/upto/scheme_upto.md", "status": 200, "captured_at_utc": "2026-10-24T21:23:34.646Z", "sha256": "9610bfbfb3d5c6d38f30448daa69eef66455096c51cff320c0206b764d434aa5", "bytes": 4938, "title": "Scheme: `upto`", "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": [ "Maximum Amount Enforcement", "Phase-Dependent amount Semantics in PaymentRequirements", "Single-Use Authorization", "Out of Scope" ], "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": "Reconcile metered usage to a bounded authorisation without confusing the ceiling with the invoice amount.", "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": "Reconcile metered usage to a bounded authorisation without confusing the ceiling with the invoice amount.", "refusal_conditions": [ "Do not report the authorised ceiling as the amount actually paid." ] }, "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": "Reconcile metered usage to a bounded authorisation without confusing the ceiling with the invoice amount.", "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-upto-maximum-versus-final-charge", "machine_readable_record": "/varexis-index/records/x402-upto-maximum-versus-final-charge.json" } } ], "access": { "mode": "exact_http_only", "payment_required": false, "purchase_url": null, "mcp_preview_available": false, "paid_saved_retrieval_available": false, "natural_language_search_qualified": false }, "boundary": "Catalogue additions are available free through the exact HTTP JSON links below. Enhanced natural-language discovery is not yet qualified for these records. They are outside MCP search, MCP preview and paid saved retrieval. No search qualification, executable capability or entitlement is added.", "content_sha256": "b7455b5ecc37a4d276dbf26d4537990a8a19af218aa35c5fcab8df38c6499936" }