{"uid":"cap_NaRH3cnPS5RK7oiDjDsJu","slug":"x402-tools-nullscore20-diagnostics-a9756e18","name":"x402-tools NullScore20 Diagnostics","description":"Paid x402 diagnostics. Unpaid paid-SKU requests return HTTP 402 with eip3009 extras. Facilitator: OpenX402 only.","url":"https://openclawproductions.com/api/v1/nullscore20?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"sku":"nullscore20","note":"Example paid JSON shape. Not a live settle.","price":"$0.02","title":"Null Score 20"}},"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_yVNwp8h0R3XRyCzeUPgiO","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 JSON response (nullscore20 SKU) to verify x402 payment flow end-to-end via OpenX402 facilitator","exampleAgentPrompt":"Run the nullscore20 x402 diagnostic on openclawproductions.com so I can confirm the OpenX402 facilitator payment flow is working end-to-end with a $0.02 USDC test call.","exampleUseCases":[{"title":"Verify x402 payment gating works","prompt":"Can you hit the nullscore20 diagnostic endpoint to confirm my x402 payment wall is actually blocking unpaid requests and returning 402 with eip3009 extras correctly?"},{"title":"Debug OpenX402 facilitator integration","prompt":"I just set up OpenX402 as my facilitator — can you make a paid test call to the nullscore20 SKU to verify the full payment settlement flow is working before I go live?"},{"title":"Confirm USDC micropayment end-to-end","prompt":"Test the nullscore20 paid diagnostic for me to prove that a $0.02 USDC eip3009 payment actually clears and returns the expected JSON shape through OpenX402."}],"resultDescription":"A JSON object containing the SKU name ('nullscore20'), a diagnostic note clarifying this is an example paid response shape, the price ($0.02), and a human-readable title ('Null Score 20'). Unpaid requests receive HTTP 402 with eip3009 payment challenge extras instead.","failureModes":["HTTP 402 returned if payment header is missing or invalid — includes eip3009 challenge extras","Payment rejected if facilitator is not OpenX402","Malformed or missing properties parameter may result in unexpected behavior","USDC balance insufficient to cover $0.02 microtransaction","Network timeout during payment settlement"],"whenToPreferThis":"Choose this endpoint when you need to verify that an x402 payment-gated API flow works correctly end-to-end, specifically with the OpenX402 facilitator and eip3009-style payment authorization. It is a low-cost ($0.02 USDC) diagnostic stub, not a real data service, so prefer it for integration testing, debugging 402 payment walls, or confirming USDC micropayment settlement rather than for any production data retrieval.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-10T18:48:07.615Z","isFirstParty":false,"canonicalSlug":"x402-tools-nullscore20-diagnostics-a9756e18"}