{"uid":"cap_Feo6bjgcDOzFOP2QxF-hE","slug":"oblique-markets-ghost-bid-audit-9b85b1ce","name":"Oblique Markets Ghost Bid Audit","description":"Use when an agent needs ghost bid audit. Returns Audit a selected agent offer against rejected affordable alternatives with counterfactual savings, regret, and a tamper-evident receipt. $0.01.","url":"https://api.oblique.markets/api/v1/paid/ghost-bid-audit","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"alternatives":{"type":"array"},"selected_offer":{"type":"object"},"max_price_atomic":{"type":"integer"},"signature_secret":{"type":"string"},"signed_selected_offer":{"type":"object"},"selected_offer_declared":{"type":"boolean"}}},"responseSchema":{"type":"json","example":{"generated_at":"2026-08-24T12:00:00.000Z","regret_score":0.25,"audit_receipt":"sha256:0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef","audit_version":"ghost-bid-audit.v1","budget_atomic":12000,"savings_atomic":3000,"selected_offer":{"id":"offer-selected","provider":"seller-a","price_atomic":12000},"price_delta_atomic":3000,"alternatives_considered":2,"selected_offer_verification":"explicit","best_rejected_affordable_option":{"id":"offer-rejected","provider":"seller-b","price_atomic":9000}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_TmSSgx9cWwsKNykLhz84o","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Audits a selected agent offer against rejected cheaper alternatives, computing counterfactual savings, regret scores, and producing a tamper-evident receipt.","exampleAgentPrompt":"Audit my agent's selected offer — it chose an offer at 5000 atomic units when there were cheaper alternatives at 3200 and 4100 — give me the counterfactual savings, regret score, and a tamper-evident receipt using my signature secret.","exampleUseCases":[{"title":"Post-purchase overpayment check","prompt":"My agent just bought an API call package for 8000 atomic units but I saw there were alternatives at 5500 and 6200 — can you audit that decision, show me how much I could have saved, and give me a signed receipt proving what alternatives were available?"},{"title":"Tamper-evident agent decision log","prompt":"I need a cryptographically verifiable receipt showing that my agent evaluated three competing offers before selecting the one at 4500 atomic units, with the rejected alternatives listed and a regret score, so I can prove the decision process was legitimate."},{"title":"Marketplace fairness audit","prompt":"Audit whether the offer my agent selected in the bazaar at 7000 atomic units was reasonable — compare it against the five rejected alternatives I'm passing in, tell me the counterfactual savings, and sign the result with my secret key."}],"resultDescription":"Returns a structured audit report including: counterfactual savings (how much cheaper the best rejected alternative was), a regret score quantifying the suboptimality of the selection, a comparison of the selected offer versus all provided alternatives, and a tamper-evident cryptographic receipt tied to the signature secret, confirming the declared offer and audit inputs.","failureModes":["Missing or malformed selected_offer object returns 400 validation error","Empty alternatives array yields trivial audit with zero counterfactual savings","Signature secret mismatch or absence prevents tamper-evident receipt generation","max_price_atomic out of range or negative returns input validation failure","selected_offer_declared flag inconsistency with signed_selected_offer causes rejection","Payment not attached (x402 protocol) results in 402 Payment Required"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to produce a verifiable, tamper-evident audit trail of a marketplace offer selection — particularly when accountability, counterfactual analysis, or proof of due diligence is required. It is the right choice when you need to quantify regret or savings relative to rejected bids, or when a downstream party needs a signed receipt proving alternatives were considered. Prefer this over simple price comparison when cryptographic integrity of the audit record matters.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T12:54:21.429Z","isFirstParty":false}