{"id":"37331b00-ae54-4981-95a7-2ed8ae4a52fe","shortId":"UGnhTR","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 settled via the x402 protocol on the Base network using USDC. The specific resource `/api/v1/lab/results/96` is labeled \"Premium API Access\" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). Payment is made inline via the X-PAYMENT header with no API keys, accounts, or rate limits required.\n\nThe broader lowpaymentfee.com platform advertises a wide catalog 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 at the same $0.02/request price point. However, the specific endpoint being listed here (`/api/v1/lab/results/96`) does not clearly map to any of those documented categories; its exact functionality is not described in the available documentation.\n\nThe endpoint is live and returns a valid x402 challenge (HTTP 402) with scheme \"exact\" on the Base network, paying to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` in USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The input method is HTTP POST and the response MIME type is `application/json`. No OpenAPI schema, request body schema, or response schema is provided, so the exact request format and response structure are unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","http-post"],"categories":["data","api-gateway"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","lab results API","premium data endpoint"],"warnings":["The specific endpoint /api/v1/lab/results/96 is not documented anywhere on the site — its purpose and expected input/output are unknown.","No OpenAPI specification or request/response schema is available.","The /api, /pricing, and /README pages returned only a 'Connect wallet' prompt with no useful content.","The endpoint path suggests it may return a single static resource (result ID 96) rather than a general-purpose API."],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/96","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/96","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 challenge, but the specific resource `/api/v1/lab/results/96` has no documentation explaining what it returns, what input it expects, or what \"lab results\" means. No OpenAPI spec, no request/response schemas, and the crawled pages provide no detail about this particular path. The listing is essentially a 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'/request':13,28,146 '0.02':12,27,66,145 '000':70 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':199 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':202 '20':69 '402':188 '6':76 'Base network API' 'USDC micropayment API' 'access':7,22,41,61 'account':92 'address':198 'advertis':101 'ai':115 'analysi':119 'analyt':109 'api':6,21,40,60,90 'application/json':215 'avail':175 'base':9,24,49,71,194 'base-network' 'bodi':220 'broader':98 'call':4,19,68 'catalog':104 'categori':166 'challeng':186 'classif':122 'clear':159 'convers':139 'cost':63 'data':108,112 'decim':77 'describ':172 'document':165,176 'embed':123 'endpoint':32,106,152,178 'estim':133 'exact':168,191,229 'exchang':128 'export':113 'feed':127 'financ':124 'format':231 'function':169 'gas':132 'generat':140 'geocod':137 'header':87 'howev':149 'http':187,207 'http-post' 'infrastructur':135 'inlin':81 'input':204 'insight':114 'json-response' 'key':91 'lab results API' 'label':58 'learn':117 'limit':95 'list':154 'live':180 'lowpaymentfee' 'lowpaymentfee.com':34,99 'machin':116 'made':80 'map':160 'method':205 'metric':110 'mime':212 'network':50,195 'no-api-key' 'openapi':217 'pay':2,17,37,196 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':36 'payment':78,86 'per':3,18,38,67 'platform':100 'point':148 'post':208 'premium':5,20,59 'premium data endpoint' 'price':126,147 'protocol':46 'provid':35,226 'quot':131 'rate':94,129 'report':111 'request':39,219,230 'requir':96 'resourc':55 'respons':211,223,233 'return':182 'schema':218,221,224 'scheme':190 'sentiment':118 'settl':42 'span':107 'specif':54,151 'structur':234 'summar':121 'text':120 'token':130 'type':213 'unit':72 'unknown':236 'usdc':15,30,52,74,201 'usdc-settlement' 'use':51 'util':136 'valid':138,184 'via':10,25,43,82 'web3':125 'wide':103 'x':85 'x-payment':84 'x402':11,26,45,185 'x402 API' 'x402-payment'","prices":[{"id":"63cc3245-8367-491c-95dd-24b358dbb6fb","listingId":"37331b00-ae54-4981-95a7-2ed8ae4a52fe","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/96","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:24.825Z"}],"sources":[{"listingId":"37331b00-ae54-4981-95a7-2ed8ae4a52fe","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/lab/results/96","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:24.825Z","lastSeenAt":"2026-04-22T01:02:20.750Z"}],"details":{"listingId":"37331b00-ae54-4981-95a7-2ed8ae4a52fe","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/lab/results/96 \\\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 valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/lab/results/96"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/lab/results/96"},{"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":"The site lists endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium data results via a single paid HTTP POST call","Agent-driven workflows that need on-demand paid API access without pre-registration","Programmatic retrieval of lab/results data with instant USDC micropayment"],"bestFor":["Developers wanting zero-signup, pay-as-you-go API access","AI agents with Base USDC wallets needing frictionless endpoint access","Low-volume or sporadic API consumers who prefer per-call pricing over subscriptions"],"notFor":["Users who need detailed API documentation or response schemas before integrating","High-volume consumers who would benefit from bulk pricing or subscription plans","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:03.488Z"},"updatedAt":"2026-04-22T01:02:20.750Z"}}