{"id":"ad357501-8720-4fd4-ab20-2989fb4d6e48","shortId":"yqWQNV","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 endpoint at `/api/v1/lab/results/75` is part of the lowpaymentfee.com platform, which offers a broad suite of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network at $0.02 per request with no API keys, rate limits, or subscriptions required.\n\nThe specific resource `/api/v1/lab/results/75` is listed under the generic title \"Premium API Access\" and accepts HTTP POST requests. Its exact response payload is not documented — the provider's landing page does not include this path among its publicly listed endpoints, and no OpenAPI schema or detailed documentation was found. The 402 challenge confirms the endpoint is live, requires a maximum of 20,000 base-unit USDC (i.e., $0.02 given USDC's 6 decimals), and returns `application/json`.\n\nThe broader platform advertises categories including metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. However, the `/api/v1/lab/results/75` path does not clearly map to any of these listed categories, so its specific functionality remains unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","json-response","no-api-key","http-post"],"categories":["data","api-marketplace"],"synonyms":["lab results API","lowpaymentfee","x402 API","micropayment API","pay-per-request","USDC API","Base network API"],"warnings":["The path /api/v1/lab/results/75 is not listed among the provider's publicly documented endpoints — its specific functionality is unknown.","No OpenAPI spec, request schema, or response schema is available.","No detailed documentation pages were accessible (pricing, README, and /api pages all returned only 'Connect wallet').","The meaning of 'lab results' in this context is entirely unclear."],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/75","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/75","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no example request/response, and the specific purpose of '/api/v1/lab/results/75' is undocumented. The path does not appear among the provider's publicly listed endpoints, making it effectively a stub 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'0.02':12,28,78,158,201 '000':152 '20':151 '402':140 '6':162 'Base network API' 'USDC API' 'accept':104 'access':102 'advertis':170 'ai/ml':57 'among':125 'analysi':179 'analyt':56 'api':53,83,101 'application/json':166 'base':9,25,75,154 'base-network' 'base-unit':153 'broad':46 'broader':168 'call':4,20,52 'categori':171,217 'challeng':141 'classif':182 'clear':210 'confirm':142 'convers':194 'data':55,175 'decim':163 'detail':135 'document':114,136 'embed':183 'endpoint':7,23,34,64,129,144 'estim':191 'exact':109 'exchang':186 'export':176 'feed':185 'finance/web3':59 'found':138 'function':221 'gas':190 'generat':196 'generic':98 'geocod':192 'given':159 'howev':204 'http':105 'http-post' 'i.e':157 'includ':122,172 'infer':58 'infrastructur':61 'insight':177 'json-response' 'key':84 'lab':5,21 'lab results API' 'land':118 'limit':86 'list':95,128,216 'live':146 'lowpaymentfee' 'lowpaymentfee.com':41 'map':211 'maximum':149 'metric':173 'micropayment API' 'network':76 'no-api-key' 'offer':44 'openapi':132 'page':119 'part':38 'path':124,207 'pay':2,18,50 'pay-per-cal':1,17,49 'pay-per-call' 'pay-per-request' 'payload':111 'payment':68 'per':3,13,19,29,51,79 'platform':42,169 'point':203 'post':106 'premium':100 'price':184,202 'protocol':69 'provid':116 'public':127 'quot':189 'rate':85,187 'remain':222 'report':174 'request':14,30,80,107 'requir':89,147 'resourc':92 'respons':110 'result':6,22 'return':165 'schema':133 'sentiment':178 'settl':70 'span':54 'specif':91,220 'subscript':88 'suit':47 'summar':181 'text':180 'titl':99 'token':188 'unclear':223 'unit':155 'usdc':16,32,72,156,160 'usdc-settlement' 'use':65 'util':62 'valid':193 'via':10,26 'x402':11,27,67 'x402 API' 'x402-payment'","prices":[{"id":"b78c48fd-e08f-4d10-9ba5-8b389d066906","listingId":"ad357501-8720-4fd4-ab20-2989fb4d6e48","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/75","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:24.719Z"}],"sources":[{"listingId":"ad357501-8720-4fd4-ab20-2989fb4d6e48","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/lab/results/75","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:24.719Z","lastSeenAt":"2026-04-22T01:02:20.573Z"}],"details":{"listingId":"ad357501-8720-4fd4-ab20-2989fb4d6e48","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/lab/results/75 \\\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 requiring USDC payment on Base network with maxAmountRequired of 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/lab/results/75"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/lab/results/75"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching lab or analytical results via a single paid HTTP POST call","Integrating pay-per-call data retrieval into agent workflows without managing API keys","Programmatic access to premium data behind x402 micropayment gating"],"bestFor":["Agents or developers wanting zero-signup, pay-per-use API access","Workflows that need on-demand data retrieval settled in USDC on Base","Prototyping integrations with x402-compatible payment flows"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume batch processing where per-request pricing may add up","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:03.75Z"},"updatedAt":"2026-04-22T01:02:20.573Z"}}