{"uid":"cap_XbefNWn_9RhOGgBGO8uME","slug":"x402-tools-free-host-fee-diagnostic-c3116979","name":"x402-tools Free Host Fee Diagnostic","description":"Paid x402 diagnostics. Unpaid paid-SKU requests return HTTP 402 with eip3009 extras. Facilitator: OpenX402 only.","url":"https://openclawproductions.com/api/v1/freehostfee?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"url":{"type":"string","description":"Public origin or resource URL. Alias of host."},"host":{"type":"string","description":"Public hostname or URL. Required."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}},"inputSchema":{"type":"object","required":["type","properties"],"properties":{"type":{"type":"string","const":"object"},"required":{"type":"array","items":{"type":"string"}},"properties":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"sku":"freehostfee","note":"Example paid JSON shape. Not a live settle.","price":"$0.02","title":"Free Host Fee"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ij0_C1CTQvd9CNIIiBWsU","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a paid diagnostic response for the 'freehostfee' SKU, validating x402 HTTP payment flow and EIP-3009 payment extensions via OpenX402 facilitator.","exampleAgentPrompt":"Run an x402 freehostfee diagnostic on https://example.com using a GET request and tell me if the paid SKU response comes back correctly with the $0.02 USDC price and EIP-3009 payment details.","exampleUseCases":[{"title":"Validate x402 integration on new domain","prompt":"I just set up x402 on my site at https://mynewsite.com — can you run the freehostfee diagnostic with a GET request and confirm the paid response looks right?"},{"title":"Debug 402 payment flow for a public API","prompt":"My API at https://api.myservice.io is supposed to return an x402 payment response, but I'm not sure if the EIP-3009 extras are correct — can you probe it with the freehostfee SKU using a GET and show me what comes back?"},{"title":"Confirm OpenX402 facilitator recognizes a host","prompt":"Check whether https://partnersite.dev is properly recognized by the OpenX402 facilitator by running the freehostfee diagnostic as a GET request and tell me the result."}],"resultDescription":"Returns a JSON object containing the SKU name ('freehostfee'), a human-readable title ('Free Host Fee'), the price ('$0.02'), and a diagnostic note confirming the paid response shape. Without a valid payment, the server returns HTTP 402 with EIP-3009 payment extras instead.","failureModes":["HTTP 402 returned if payment is not included or invalid — contains EIP-3009 extras describing how to pay","Invalid or unreachable host URL causes request failure","Non-GET/HEAD/DELETE method rejected by schema","Missing required 'host' or 'url' query parameter results in validation error","OpenX402 facilitator not available or misconfigured causes service unavailability"],"whenToPreferThis":"Choose this endpoint when you need to test, validate, or diagnose x402 HTTP payment protocol behavior on a specific host or URL, particularly to confirm EIP-3009 payment extensions are correctly formed and that the OpenX402 facilitator recognizes the host. It is not a general-purpose payment processor — use it specifically for x402 diagnostic and integration verification workflows.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-10T18:46:56.760Z","isFirstParty":false,"canonicalSlug":"x402-tools-free-host-fee-diagnostic-c3116979"}