{"uid":"cap_hRrGVeEviBlNBvnGFO4Hk","slug":"x402-tools-facilitator-diff-diagnostic-3e119788","name":"x402-tools Facilitator Diff Diagnostic","description":"Paid x402 diagnostics. Unpaid paid-SKU requests return HTTP 402 with eip3009 extras. Facilitator: OpenX402 only.","url":"https://openclawproductions.com/api/v1/facdiff?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":{"origin":{"type":"string","description":"Origin URL to inspect"}}}},"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":"facdiff","note":"Example paid JSON shape. Not a live settle.","price":"$0.03","title":"Fac Diff"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.03","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":"$0.03/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_OSLw23hLXKJ8m-DOxCeM2","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.03","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Inspects a given origin URL and returns x402 facilitator diagnostic differences, revealing payment-gating details and EIP-3009 extras for paid API access.","exampleAgentPrompt":"Can you run the facdiff diagnostic on https://example.com/api/v1/data to see what x402 facilitator is assigned and what EIP-3009 extras come back on the 402 response?","exampleUseCases":[{"title":"Debug 402 payment gate on API","prompt":"I'm getting HTTP 402 from https://api.myservice.com/premium/data and I need to know what EIP-3009 extras and facilitator info the x402 diagnostic returns for that origin."},{"title":"Verify facilitator assignment for x402 endpoint","prompt":"Can you check https://partner.io/api/v1/feed with the facdiff tool and tell me which x402 facilitator is listed and whether the payment config looks correct?"},{"title":"Audit x402 payment requirements before integration","prompt":"Before I integrate with https://datavendor.com/api/stream, can you run x402 diagnostics on it so I can see the full payment-gating setup including any EIP-3009 fields?"}],"resultDescription":"Returns a JSON object containing x402 facilitator diagnostic data for the inspected origin URL, including facilitator identity (OpenX402), EIP-3009 payment extras embedded in the HTTP 402 response, paid SKU details, and any diff information between expected and actual facilitator configuration.","failureModes":["Origin URL not reachable — network error or timeout","Origin does not implement x402 — no 402 response returned, diagnostic may return empty or error","Payment not provided — unpaid requests return HTTP 402 with EIP-3009 extras (the service itself is paywalled at $0.03 USDC)","Invalid origin URL format — missing or malformed input returns validation error","Facilitator not OpenX402 — endpoint only recognizes OpenX402 as valid facilitator, others may return diff mismatch"],"whenToPreferThis":"Use this endpoint when you need to inspect and diagnose x402 payment-gating on a specific origin URL, particularly to retrieve EIP-3009 extras, confirm facilitator identity (OpenX402), and understand the full HTTP 402 response structure. Prefer this over generic HTTP inspection tools when the target is suspected to be x402-protected and you need structured facilitator diff output rather than raw headers.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T00:31:41.960Z","isFirstParty":false,"canonicalSlug":"x402-tools-facilitator-diff-diagnostic-3e119788"}