{"id":"5c93c77a-4bef-48af-b975-72ab28160108","shortId":"ccXyPh","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":"lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/lab/results/69` is listed under \"Premium API Access\" and returns JSON content. Payment is settled on-chain with no API keys, no rate limits, and no subscriptions required — each call costs $0.02 (20,000 base units of USDC with 6 decimals).\n\nThe broader platform offers endpoints across several categories: 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 share the same $0.02/request pricing model and are accessible via the x402 payment protocol on Base.\n\nThe specific purpose of `/api/v1/lab/results/69` is not documented beyond the generic \"Premium API Access\" label. There is no OpenAPI schema, no request/response examples, and no detailed documentation available from the crawled pages. The endpoint accepts POST requests and returns `application/json`. Without further documentation it is unclear what data this particular endpoint returns or what request body it expects.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","no-api-key","post-method"],"categories":["data","api-marketplace"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","lab results api"],"warnings":["No documentation available for this specific endpoint — purpose and response format are unknown","No OpenAPI or schema definition provided","No request body or response examples available","The endpoint path '/api/v1/lab/results/69' suggests a specific resource but its content is undocumented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/69","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/69","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 402 challenge, confirming pricing and payment details. However, there is no OpenAPI schema, no request/response examples, and no documentation explaining what '/api/v1/lab/results/69' actually returns. The listing is effectively a stub with confirmed liveness and pricing but no functional 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'/request':13,28,144 '0.02':12,27,87,143 '000':89 '20':88 '6':95 'accept':46,191 'access':7,22,62,149,170 'across':102 'ai':112 'analysi':116 'analyt':106 'api':6,21,38,61,75,169 'application/json':196 'avail':184 'base':9,24,51,90,156 'base network api' 'beyond':165 'bodi':212 'broader':98 'call':4,19,85 'categori':104 'chain':72 'classif':119 'content':66 'convers':136 'cost':86 'crawl':187 'data':105,109,204 'decim':96 'detail':182 'document':164,183,199 'embed':120 'endpoint':55,101,139,190,207 'estim':130 'exampl':179 'exchang':125 'expect':214 'export':110 'feed':124 'financ':121 'gas':129 'generat':137 'generic':167 'geocod':134 'infrastructur':132 'insight':111 'json':65 'json-response' 'key':76 'lab results api' 'label':171 'learn':114 'limit':79 'list':58 'low payment fee' 'lowpaymentfee.com':31 'machin':113 'metric':107 'micropayment api' 'model':146 'network':52 'no-api-key' 'offer':100 'on-chain':70 'openapi':175 'page':188 'particular':206 'pay':2,17,35 'pay per call api' 'pay-per-cal':1,16 'pay-per-request':34 'payment':48,67,153 'per':3,18,36 'platform':39,99 'post':192 'post-method' 'premium':5,20,60,168 'price':123,145 'protocol':44,154 'purpos':159 'quot':128 'rate':78,126 'report':108 'request':37,193,211 'request/response':178 'requir':83 'return':64,195,208 'schema':176 'sentiment':115 'settl':69 'sever':103 'share':140 'specif':54,158 'subscript':82 'summar':118 'text':117 'token':127 'unclear':202 'unit':91 'usdc':15,30,47,93 'usdc api' 'usdc-base' 'use':41 'util':133 'valid':135 'via':10,25,150 'web3':122 'without':197 'x402':11,26,43,152 'x402 api' 'x402-payment'","prices":[{"id":"022c6c8a-4825-45b9-82a1-349b9ee655fc","listingId":"5c93c77a-4bef-48af-b975-72ab28160108","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/69","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:24.464Z"}],"sources":[{"listingId":"5c93c77a-4bef-48af-b975-72ab28160108","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/lab/results/69","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:24.464Z","lastSeenAt":"2026-04-22T01:02:20.228Z"}],"details":{"listingId":"5c93c77a-4bef-48af-b975-72ab28160108","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/lab/results/69 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","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 requesting USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/lab/results/69"},{"claim":"maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02 per request","source_url":"https://lowpaymentfee.com/api/v1/lab/results/69"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/lab/results/69"}],"useCases":["Accessing premium data or lab results via a single pay-per-call transaction","Integrating pay-as-you-go API access into agent workflows without managing API keys","Programmatic on-chain micropayments for data retrieval"],"bestFor":["Developers wanting zero-commitment, per-request API access","AI agents that can settle x402 payments autonomously on Base","Users who prefer on-chain USDC payments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:04.131Z"},"updatedAt":"2026-04-22T01:02:20.228Z"}}