{"id":"c32dc825-2c08-4f62-b697-e38fb5e4e30a","shortId":"Kr6QGT","kind":"x402","title":"x402-gated lab results endpoint on Base, pay-per-call with USDC at $0.02/request.","tagline":"x402-gated lab results endpoint on Base, pay-per-call with USDC at $0.02/request.","description":"This endpoint at `/api/v1/lab/results/8` is part of the lowpaymentfee.com platform, which offers a suite of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. The specific resource at path `/lab/results/8` is labeled \"Premium API Access\" and returns JSON content gated behind an x402 payment challenge. Payment is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) at a maximum cost of $0.02 per request (20,000 base units with 6 decimals).\n\nThe platform advertises a simple pricing model: $0.02 per request across all endpoints, with no API keys, no rate limits, no minimums, and instant access. The x402 challenge was confirmed live via a POST probe returning HTTP 402 with a well-formed x402 version 1 challenge. However, the specific purpose of the `/lab/results/8` endpoint is unclear — the provider's landing page does not list it among its documented API categories (Data & Analytics, AI & ML, Finance & Web3, Infrastructure). The \"lab\" path segment and numeric ID suggest it may be an experimental or test endpoint, or it could return a specific pre-computed result set.\n\nNo OpenAPI schema, detailed documentation, or example responses were found for this specific endpoint. The crawled /api, /pricing, and /README pages all returned only a \"Connect wallet\" prompt with no additional content. Without documentation on the request body format or response structure, callers will need to experiment to determine what this endpoint actually returns.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key"],"categories":["data","infrastructure"],"synonyms":["lab results API","x402 paid endpoint","USDC micropayment API","lowpaymentfee","pay-per-call API","Base network API","premium data access"],"warnings":["The /api/v1/lab/results/8 path is not listed among the provider's documented endpoints — it may be experimental or undocumented.","No request body schema or response schema is available; callers must discover the contract by trial.","The /api, /pricing, and /README pages returned no useful content beyond 'Connect wallet'.","The purpose and data content of this specific endpoint are unknown."],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/8","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/lab/results/8","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation on what /lab/results/8 actually returns, no request/response schema, and the endpoint is not listed on the provider's own landing page. The crawled docs pages were empty beyond a wallet connect 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'/api/v1/lab/results/8':38 '/lab/results/8':73,168 '/pricing':237 '/readme':239 '/request':17,34 '0.02':16,33,105,122 '000':109 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':99 '1':160 '20':108 '402':152 '6':113 'Base network API' 'USDC micropayment API' 'access':78,139 'across':125 'actual':272 'addit':250 'advertis':117 'ai':188 'ai/ml':61 'among':181 'analyt':60,187 'api':57,77,130,184 'base':8,25,94,110 'base-network' 'behind':84 'bodi':257 'call':12,29 'caller':262 'categori':185 'challeng':88,142,161 'comput':217 'confirm':144 'connect':245 'content':82,251 'contract':98 'cost':103 'could':211 'crawl':235 'data':59,64,186 'decim':114 'detail':223 'determin':268 'document':183,224,253 'endpoint':6,23,36,127,169,208,233,271 'exampl':226 'experi':266 'experiment':205 'financ':190 'finance/web3':63 'form':157 'format':258 'found':229 'gate':3,20,83 'howev':162 'http':151 'id':199 'infer':62 'infrastructur':66,192 'instant':138 'json':81 'json-response' 'key':131 'lab':4,21,194 'lab 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'x402':2,19,51,86,141,158 'x402 paid endpoint' 'x402-gated':1,18 'x402-payment' 'x402-protocol':50","prices":[{"id":"6c2f50e6-1f57-402c-befa-faeab52df4fb","listingId":"c32dc825-2c08-4f62-b697-e38fb5e4e30a","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/lab/results/8","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:24.574Z"}],"sources":[{"listingId":"c32dc825-2c08-4f62-b697-e38fb5e4e30a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/lab/results/8","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:24.574Z","lastSeenAt":"2026-04-22T01:02:20.382Z"}],"details":{"listingId":"c32dc825-2c08-4f62-b697-e38fb5e4e30a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/lab/results/8 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/lab/results/8"},{"claim":"The platform charges $0.02 per request with no API keys, no rate limits, and no minimums","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/lab/results/8"}],"useCases":["Retrieving a specific lab result or pre-computed data set via pay-per-request","Testing x402 payment protocol integration with a low-cost endpoint","Accessing gated JSON data without API key registration"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-call data access on Base","Low-cost per-request data retrieval without subscriptions"],"notFor":["Users needing well-documented API contracts with clear schemas","High-volume batch processing where per-request pricing adds up","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:03.889Z"},"updatedAt":"2026-04-22T01:02:20.382Z"}}