{"uid":"cap_iA5uXgHqLMgSJyQLo-g2T","slug":"blackhull-x402-service-flag-checker-1034a0c7","name":"Blackhull x402 Service Flag Checker","description":"Blackhull measures the agent economy and sells AI agents the check they run before they pay another service.","url":"https://blackhullsystems.com/flags?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"const":"http"},"method":{"const":"GET"},"queryParams":{"type":"object","required":["url"],"properties":{"url":{"type":"string","description":"the x402 resource URL"}}}}},"output":{"type":"object","properties":{"type":{"const":"json"},"schema":{"type":"object"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"codes":[{"code":"PAID_AS_LISTED","severity":"positive"}],"grade":"CLEAN"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_iIRorRlfG2Fx1KhFlZk2_","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns compliance flags and a grade for a given x402 resource URL, indicating whether the service behaves as listed and meets quality standards.","exampleAgentPrompt":"Check the Blackhull flags for this x402 service — https://someprovider.com/api/endpoint — and tell me if it's clean or has any compliance issues before I start using it.","exampleUseCases":[{"title":"Pre-payment safety screen","prompt":"Before my agent starts paying for calls to https://dataprovider.ai/prices, can you pull the Blackhull flags on it and tell me if it's graded CLEAN or if there are any warning codes?"},{"title":"Automated agent trust check","prompt":"My workflow is about to route payments to https://inference.example.com/generate — run a Blackhull flag check on that URL first and block the call if the grade isn't CLEAN."},{"title":"Vetting a new x402 vendor","prompt":"I'm evaluating https://newsapi.x402.io/headlines as a data source for my agent. Pull the Blackhull compliance flags for it so I can see if it's been marked as paid-as-listed or has any negative codes."}],"resultDescription":"A JSON object containing an array of code objects (each with a 'code' string like 'PAID_AS_LISTED' and a 'severity' label such as 'positive', 'warning', or 'negative') plus a top-level 'grade' field summarizing the overall compliance status (e.g. 'CLEAN').","failureModes":["URL not found in Blackhull's index — returns empty codes array or unknown grade","Malformed or missing 'url' query parameter — likely a 400-level error","x402 service too new to have been assessed — may return no flags yet","Network timeout contacting blackhullsystems.com — no response"],"whenToPreferThis":"Use this endpoint when you need a quick, structured trust signal on a specific x402 resource URL before routing agent payments to it. It is purpose-built for the x402 micropayment ecosystem and returns machine-readable compliance codes and grades, making it ideal for automated pre-payment screening in agent workflows. Prefer it over general web-reputation tools when the target is specifically an x402-gated API.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:34:34.966Z","isFirstParty":false,"canonicalSlug":"blackhull-x402-service-flag-checker-1034a0c7"}