{"id":"7b9f363a-2118-4f7b-8fa3-517345e2e177","shortId":"2wwKc3","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 \"Premium API Access\" via the x402 payment protocol. The specific resource `/api/v1/lab/results/11` appears to be part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe x402 challenge for this endpoint advertises a maxAmountRequired of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, which uses 6 decimals), equating to $0.02 per call. Payment is made via the `exact` scheme, with a 300-second timeout. The endpoint accepts HTTP POST requests and returns `application/json`. No API keys or rate limits are advertised; access is gated purely by the x402 payment header.\n\nThe specific purpose of `/api/v1/lab/results/11` is not documented on the site — the landing page lists other endpoint categories (analytics, AI, finance, utilities) but does not mention a `/lab/results` path. This may be a test or experimental endpoint. The broader platform markets itself as offering simple, keyless, per-request pricing with no minimums or commitments.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-call","json-response","no-api-key","http-post"],"categories":["data","api-marketplace"],"synonyms":["lowpaymentfee","low payment fee API","x402 API","pay per request API","USDC API access","Base network API","micropayment API"],"warnings":["The /api/v1/lab/results/11 path is not listed or documented on the provider's landing page — it may be experimental or a test endpoint.","No OpenAPI spec, request schema, or response examples are available.","Crawled /api, /pricing, and /README pages returned no useful content (only 'Connect wallet').","The exact data returned by this endpoint is unknown; use with caution."],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/11","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/11","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 captured) and pricing is clear ($0.02 USDC on Base). However, the specific `/lab/results/11` path is undocumented, there is no OpenAPI schema, no request/response examples, and the crawled pages beyond the landing page returned only 'Connect wallet' with no useful content. The purpose of this particular endpoint is 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'/lab/results':181 '/request':13,28 '0.02':12,27,78,113 '000':100 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':106 '20':99 '300':125 '6':109 'Base network API' 'USDC API access' 'accept':130 'access':7,22,38,145 'advertis':95,144 'ai':173 'ai/ml':68 'analyt':67,172 'api':6,21,37,63,138 'appear':48 'application/json':136 'asset':105 'base':9,24,87,101 'broader':54,192 'call':4,19,62,115 'categori':171 'challeng':91 'commit':208 'data':66,71 'decim':110 'document':161 'dozen':57 'endpoint':32,64,94,129,170,190 'equat':111 'exact':121 'experiment':189 'financ':174 'finance/web3':70 'gate':147 'header':153 'http':131 'http-post' 'infer':69 'infrastructur':73 'json-response' 'key':139 'keyless':199 'land':166 'limit':142 'list':168 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':34 'made':118 'market':194 'maxamountrequir':97 'may':184 'mention':179 'micropayment API' 'minimum':206 'network':88 'no-api-key' 'offer':56,197 'page':167 'part':51 'path':182 'pay':2,17,60 'pay per request API' 'pay-per-cal':1,16,59 'pay-per-call' 'payment':42,116,152 'per':3,18,61,79,114,201 'per-request':200 'platform':55,193 'post':132 'premium':5,20,36 'price':76,203 'protocol':43 'provid':35 'pure':148 'purpos':156 'rate':141 'request':80,133,202 'resourc':46 'return':135 'scheme':122 'second':126 'settl':82 'simpl':198 'site':164 'span':65 'specif':45,155 'test':187 'timeout':127 'unit':102 'usdc':15,30,84,104 'usdc-base' 'use':108 'util':74,175 'via':10,25,39,119 'x402':11,26,41,90,151 'x402 API' 'x402-payment'","prices":[{"id":"e6e4e313-f654-4e58-b8b7-b50309e5cf9f","listingId":"7b9f363a-2118-4f7b-8fa3-517345e2e177","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/11","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:24.083Z"}],"sources":[{"listingId":"7b9f363a-2118-4f7b-8fa3-517345e2e177","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/lab/results/11","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:24.083Z","lastSeenAt":"2026-04-22T05:32:13.137Z"}],"details":{"listingId":"7b9f363a-2118-4f7b-8fa3-517345e2e177","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/lab/results/11 \\\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 x402 challenge advertises maxAmountRequired of 20000 base units of USDC on Base with a 300-second timeout.","source_url":"https://lowpaymentfee.com/api/v1/lab/results/11"},{"claim":"The platform lists endpoints priced at $0.02/request across data, AI, finance, and utility categories with no API keys or rate limits.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is USDC on Base (6 decimals), so 20000 base units = $0.02.","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium data or results via a single paid HTTP POST call","Agent-driven API consumption without pre-registration or API keys","Programmatic pay-as-you-go access to various data and utility endpoints"],"bestFor":["Developers or agents wanting keyless, per-call API access settled in USDC on Base","Exploring x402 payment protocol integrations","Low-commitment, no-subscription API consumption"],"notFor":["Users needing detailed documentation or guaranteed SLAs for production workloads","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:04.768Z"},"updatedAt":"2026-04-22T05:32:13.137Z"}}