{"id":"8adbeb68-ec71-437c-9654-f6371ef74bd2","shortId":"hxrdLU","kind":"x402","title":"Pay-per-call lab results endpoint on Base via x402 — $0.02 per request in USDC.","tagline":"Pay-per-call lab results endpoint on Base via x402 — $0.02 per request in USDC.","description":"This x402-enabled endpoint at `/api/v1/lab/results/62` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. Each call is settled on the Base network using USDC (USD Coin) at a cost of $0.02 per request. No API keys, rate limits, or subscriptions are required — callers simply attach an x402 payment header to each request.\n\nThe specific endpoint `/api/v1/lab/results/62` is listed under the generic title \"Premium API Access.\" The crawled site does not provide documentation for this particular path, so its exact response payload is unclear. It may return lab-related result data keyed to ID 62, but no schema or sample response is documented. The endpoint is confirmed live: it returns a proper 402 challenge with x402 version 1, accepting USDC on Base with a max amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals).\n\nThe broader lowpaymentfee.com platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and data export — all at the same $0.02 price point. No OpenAPI spec, detailed documentation, or example responses were found during the crawl; the /api, /pricing, and /README pages all returned only a \"Connect wallet\" prompt with no substantive content.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","lab-results"],"categories":["data","infrastructure"],"synonyms":["lab results API","pay per call API","x402 endpoint","USDC micropayment API","lowpaymentfee","Base network API","premium API access"],"warnings":["No documentation exists for the /api/v1/lab/results/62 endpoint — its purpose and response schema are unknown.","The /api, /pricing, and /README pages returned only 'Connect wallet' with no substantive content.","No OpenAPI specification or schema is available for any endpoint on this platform.","The endpoint path suggests a fixed resource ID (62); it is unclear whether other IDs are available or what 'lab results' refers to."],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/62","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/62","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documentation for this specific path, no example request/response, and the crawled pages beyond the homepage returned no useful content. The purpose of '/lab/results/62' is 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'/api/v1/lab/results/62':39,108 '/pricing':236 '/readme':238 '0.02':12,28,83,185,218 '000':181 '1':170 '20':180 '402':165 '6':189 '62':147 'Base network API' 'USDC micropayment API' 'accept':171 'access':117 'advertis':195 'ai/ml':60 'amount':178 'analysi':199 'analyt':59 'api':56,87,116 'attach':97 'base':9,25,73,174,182 'base-network' 'broad':49 'broader':192 'call':4,20,68 'caller':95 'catalog':50 'challeng':166 'classif':202 'coin':78 'confirm':159 'connect':244 'content':250 'convers':210 'cost':81 'crawl':119,233 'crypto':63 'data':58,143,212 'decim':190 'detail':224 'document':124,155,225 'embed':203 'enabl':36 'endpoint':7,23,37,107,157,196 'exact':131 'exampl':227 'exchang':206 'export':213 'feed':205 'financ':62 'found':230 'generic':113 'geocod':208 'given':186 'header':101 'i.e':184 'id':146 'infer':61 'key':88,144 'lab':5,21,140 'lab results API' 'lab-rel':139 'lab-results' 'limit':90 'list':110 'live':160 'lowpaymentfee' 'lowpaymentfee.com':44,193 'max':177 'may':137 'network':74 'no-api-key' 'offer':47 'openapi':222 'page':239 'part':41 'particular':127 'path':128 'pay':2,18,53 'pay per call API' 'pay-per-cal':1,17 'pay-per-request':52 'payload':133 'payment':100 'per':3,13,19,29,54,84 'platform':45,194 'point':220 'premium':115 'premium API access' 'price':204,219 'prompt':246 'proper':164 'provid':123 'rate':89,207 'relat':141 'request':14,30,55,85,104 'requir':94 'respons':132,153,228 'result':6,22,142 'return':138,162,241 'sampl':152 'schema':150 'sentiment':198 'servic':66 'settl':70 'simpli':96 'site':120 'span':57 'spec':223 'specif':106 'subscript':92 'substant':249 'summar':201 'text':200 'titl':114 'unclear':135 'unit':183 'usd':77 'usdc':16,32,76,172,187 'usdc-settlement' 'use':75 'util':65 'valid':209 'version':169 'via':10,26 'wallet':245 'x402':11,27,35,99,168 'x402 endpoint' 'x402-enabled':34 'x402-payment'","prices":[{"id":"81bb2079-319a-4685-b16c-1444325a2872","listingId":"8adbeb68-ec71-437c-9654-f6371ef74bd2","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/62","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:24.677Z"}],"sources":[{"listingId":"8adbeb68-ec71-437c-9654-f6371ef74bd2","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/lab/results/62","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:24.677Z","lastSeenAt":"2026-04-22T01:02:20.496Z"}],"details":{"listingId":"8adbeb68-ec71-437c-9654-f6371ef74bd2","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/lab/results/62 \\\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 challenge with x402 version 1, accepting USDC on Base with maxAmountRequired of 20000 base units.","source_url":"https://lowpaymentfee.com/api/v1/lab/results/62"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","source_url":"https://lowpaymentfee.com/api/v1/lab/results/62"},{"claim":"The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"Available API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure.","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving lab result data on-demand with per-call USDC micropayments","Integrating pay-per-use data endpoints into agent workflows without API key management","Accessing premium data behind x402 payment gates on the Base L2 network"],"bestFor":["Agents or applications that need keyless, pay-per-call API access","Developers experimenting with x402 payment protocol integrations","Use cases requiring low-friction micropayments ($0.02) on Base"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume batch processing where per-call fees would accumulate significantly","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:03.751Z"},"updatedAt":"2026-04-22T01:02:20.496Z"}}