{"id":"05931145-82a0-4fb2-9948-aa3d2bb615fd","shortId":"Xfdwme","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides pay-per-request API access using the x402 protocol, settling payments in USDC on the Base network. The specific resource `/api/v1/lab/results/36` is listed under \"Premium API Access\" and costs up to $0.02 per call (maxAmountRequired of 20,000 base units of USDC with 6 decimals = $0.02). No API keys, rate limits, or subscriptions are required — each request is individually paid via an X-PAYMENT header.\n\nThe broader lowpaymentfee.com platform offers a suite of endpoints spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request.\n\nThe specific endpoint `/api/v1/lab/results/36` appears to be a lab results resource, but no documentation describes what data it returns or what input it expects beyond a POST request with JSON content type. The endpoint is live and returns a valid x402 402 challenge. Without further documentation or schema details, the exact payload structure and response format remain unknown.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-settlement","base-network","json-api","post-method","no-api-key","no-rate-limit"],"categories":["data","api-marketplace"],"synonyms":["pay-per-call API","x402 API","USDC micropayment API","Base network API","lowpaymentfee","lab results API","premium data endpoint"],"warnings":["No documentation available for this specific endpoint — purpose of 'lab results/36' is unknown","No request body schema or response schema provided","No OpenAPI spec, README, or API docs found on the site","The /api, /pricing, and /README pages returned no useful content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/36","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/36","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, but there is no documentation on what `/api/v1/lab/results/36` actually returns, no request/response schema, and no examples. The crawled pages beyond the homepage are empty (just 'Connect wallet'). The endpoint's purpose is unclear — 'lab results' is 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'/request':13,28 '0.02':12,27,68,82,151 '000':74 '20':73 '402':195 '6':80 'Base network API' 'USDC micropayment API' 'access':7,22,41,63 'ai':120 'analysi':124 'analyt':114 'api':6,21,40,62,84 'appear':158 'base':9,24,52,75 'base-network' 'beyond':178 'broader':104 'call':4,19,70 'challeng':196 'classif':127 'content':184 'convers':144 'cost':65 'data':113,117,170 'decim':81 'describ':168 'detail':202 'document':167,199 'embed':128 'endpoint':32,111,147,156,187 'estim':138 'exact':204 'exchang':133 'expect':177 'export':118 'feed':132 'financ':129 'format':209 'gas':137 'generat':145 'geocod':142 'header':102 'individu':95 'infrastructur':140 'input':175 'insight':119 'json':183 'json-api' 'key':85 'lab':162 'lab results API' 'learn':122 'limit':87 'list':59 'live':189 'lowpaymentfee' 'lowpaymentfee.com':34,105 'machin':121 'maxamountrequir':71 'metric':115 'network':53 'no-api-key' 'no-rate-limit' 'offer':107 'paid':96 'pay':2,17,37 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':36 'payload':205 'payment':47,101 'per':3,18,38,69,152 'per-request-billing' 'platform':106 'post':180 'post-method' 'premium':5,20,61 'premium data endpoint' 'price':131,149 'protocol':45 'provid':35 'quot':136 'rate':86,134 'remain':210 'report':116 'request':39,93,153,181 'requir':91 'resourc':56,164 'respons':208 'result':163 'return':172,191 'schema':201 'sentiment':123 'settl':46 'span':112 'specif':55,155 'structur':206 'subscript':89 'suit':109 'summar':126 'text':125 'token':135 'type':185 'unit':76 'unknown':211 'usdc':15,30,49,78 'usdc-settlement' 'use':42 'util':141 'valid':143,193 'via':10,25,97 'web3':130 'without':197 'x':100 'x-payment':99 'x402':11,26,44,194 'x402 API' 'x402-payment'","prices":[{"id":"fde420f8-d2a0-42ed-85a0-c1b951fb65d3","listingId":"05931145-82a0-4fb2-9948-aa3d2bb615fd","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/36","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:24.235Z"}],"sources":[{"listingId":"05931145-82a0-4fb2-9948-aa3d2bb615fd","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/lab/results/36","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:24.235Z","lastSeenAt":"2026-04-22T04:02:37.798Z"}],"details":{"listingId":"05931145-82a0-4fb2-9948-aa3d2bb615fd","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/lab/results/36 \\\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":"Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/lab/results/36"},{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/lab/results/36"}],"useCases":["Accessing premium data or lab results on a per-request basis without subscriptions","Agent-driven workflows that need pay-as-you-go API access settled in USDC on Base","Programmatic retrieval of resource #36 lab results via x402 payment protocol"],"bestFor":["Developers wanting zero-commitment, pay-per-use API access","AI agents with USDC on Base that need to purchase API calls autonomously","Users who prefer crypto micropayments over traditional API key subscriptions"],"notFor":["Users needing detailed API documentation or well-defined schemas before integrating","High-volume consumers who would benefit from bulk pricing or subscription plans","Users without USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:04.514Z"},"updatedAt":"2026-04-22T04:02:37.798Z"}}