{"uid":"cap_9IjQ4s3ZhUIAuzRkJDfI4","slug":"bounty-engineer-x402-payment-preflight-4beb37cd","name":"Bounty Engineer x402 Payment Preflight","description":"Machine-buyable infrastructure for autonomous agents: API cost routing, margin optimization, funding-rate data, webpage extraction, result verification, spend controls, retry planning, state, tender search and GitHub bounty intelligence.","url":"https://bounty-engineer-x402-prod.onrender.com/v1/x402-payment-preflight?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string","format":"uri"}}},"responseSchema":{"type":"json","example":{"ok":true,"mode":"x402_payment_preflight","score":100,"decision":"metadata_ready"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_aKnZw1YCgzfP_ir1X4Tfz","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks and prepares x402 payment metadata for a given URL before an autonomous agent commits a micropayment","exampleAgentPrompt":"Before you spend any USDC on that API, run a preflight check on https://api.example.com/data to see if it's x402-ready and what the payment decision comes back as.","exampleUseCases":[{"title":"Pre-payment API access check","prompt":"Before my agent calls that bounty data endpoint, can you preflight https://bounty-engineer-x402-prod.onrender.com/v1/some-endpoint and tell me if it's ready for x402 payment and what score it gets?"},{"title":"Routing decision for cost optimization","prompt":"I'm trying to figure out which of these two APIs is actually x402-compatible before routing my agent's spend — can you run a preflight on https://api.someservice.io/query and tell me the mode and decision?"},{"title":"Validating new endpoint before agent fleet deployment","prompt":"We're about to deploy a fleet of agents to use a new paid API — can you do an x402 payment preflight on https://partner-api.example.com/v2/data so we know it'll work before we go live?"}],"resultDescription":"Returns a JSON object with an 'ok' boolean, a 'mode' string (e.g. 'x402_payment_preflight'), a numeric 'score' (0–100) indicating payment readiness, and a 'decision' string (e.g. 'metadata_ready') indicating whether the endpoint is prepared for x402 payment processing.","failureModes":["Invalid or malformed URL returns validation error","URL not reachable or returns non-x402 response leads to low score or failed decision","Missing URL field in request body causes 400-level error","Endpoint may return ok:false with a decision indicating metadata is not ready"],"whenToPreferThis":"Use this endpoint when an autonomous agent needs to confirm that a target URL supports x402 payment semantics before committing USDC — especially useful for cost routing, agent fleet deployment validation, or any workflow where payment failures are expensive. Prefer this over blindly calling a paid endpoint and handling 402 errors reactively.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:43:40.975Z","isFirstParty":false,"canonicalSlug":"bounty-engineer-x402-payment-preflight-4beb37cd"}