{"id":"f4dec421-ef60-4518-bc71-3f251b3f8983","shortId":"L87VWs","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/97` 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 with each HTTP POST request — no API keys, accounts, or rate limits are required.\n\nThe broader lowpaymentfee.com platform advertises 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 listed at the same $0.02/request price point and use the same x402 payment flow on Base.\n\nThe specific endpoint `/api/v1/lab/results/97` does not have detailed documentation explaining what \"lab results\" refers to — the path suggests it may return a specific result set identified by ID 97, but the exact data content is undocumented. No OpenAPI schema, request/response examples, or detailed field descriptions were found in the crawl. The endpoint is confirmed live (returns a proper 402 x402 challenge).","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","http-post"],"categories":["data","api-marketplace"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","lab results API","premium data endpoint"],"warnings":["No documentation found for the specific /api/v1/lab/results/97 endpoint — purpose and response format are unknown","No OpenAPI schema or request/response examples available","The 'lab/results/97' path is opaque; it is unclear what data is returned or what input is expected in the POST body","Other crawled pages (/api, /pricing, /README) returned only a 'Connect wallet' prompt with no useful content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/97","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/97","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge, but there is no documentation on what `/api/v1/lab/results/97` actually returns. No OpenAPI spec, no request/response schema, and no description beyond the generic 'Premium API Access' label. The broader site lists many endpoints but provides no per-endpoint docs. Effectively a stub 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'/request':13,28,147 '0.02':12,27,66,146 '000':70 '20':69 '402':217 '6':76 '97':187 'Base network API' 'USDC micropayment API' 'access':7,22,41,61 'account':90 'advertis':100 'ai':113 'analysi':117 'analyt':107 'api':6,21,40,60,88 'base':9,24,49,71,158 'base-network' 'broader':97 'call':4,19,68 'challeng':219 'classif':120 'confirm':212 'content':192 'convers':137 'cost':63 'crawl':208 'data':106,110,191 'decim':77 'descript':203 'detail':166,201 'document':167 'embed':121 'endpoint':32,104,140,161,210 'estim':131 'exact':190 'exampl':199 'exchang':126 'explain':168 'export':111 'feed':125 'field':202 'financ':122 'flow':156 'found':205 'gas':130 'generat':138 'geocod':135 'http':84 'http-post' 'id':186 'identifi':184 'infrastructur':133 'inlin':81 'insight':112 'json-response' 'key':89 'lab':170 'lab results API' 'label':58 'learn':115 'limit':93 'list':142 'live':213 'lowpaymentfee' 'lowpaymentfee.com':34,98 'machin':114 'made':80 'may':178 'metric':108 'network':50 'no-api-key' 'openapi':196 'path':175 'pay':2,17,37 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':36 'payment':78,155 'per':3,18,38,67 'platform':99 'point':149 'post':85 'premium':5,20,59 'premium data endpoint' 'price':124,148 'proper':216 'protocol':46 'provid':35 'quot':129 'rate':92,127 'refer':172 'report':109 'request':39,86 'request/response':198 'requir':95 'resourc':55 'result':171,182 'return':179,214 'schema':197 'sentiment':116 'set':183 'settl':42 'span':105 'specif':54,160,181 'suggest':176 'suit':102 'summar':119 'text':118 'token':128 'undocu':194 'unit':72 'usdc':15,30,52,74 'usdc-settlement' 'use':51,151 'util':134 'valid':136 'via':10,25,43 'web3':123 'x402':11,26,45,154,218 'x402 API' 'x402-payment'","prices":[{"id":"46588c3e-69c1-41f9-a0f2-efd4a6fdf70e","listingId":"f4dec421-ef60-4518-bc71-3f251b3f8983","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/97","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:24.807Z"}],"sources":[{"listingId":"f4dec421-ef60-4518-bc71-3f251b3f8983","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/lab/results/97","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:24.807Z","lastSeenAt":"2026-04-22T01:02:20.734Z"}],"details":{"listingId":"f4dec421-ef60-4518-bc71-3f251b3f8983","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/lab/results/97 \\\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 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/lab/results/97"},{"claim":"All endpoints are priced at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/lab/results/97"}],"useCases":["Accessing premium data results without creating an account or managing API keys","Agent-driven workflows that need on-demand paid data retrieval","Programmatic access to lab/results data with per-call USDC micropayments"],"bestFor":["Developers wanting frictionless pay-per-use API access on Base","AI agents that can settle x402 payments autonomously","Users who prefer no-subscription, no-rate-limit API consumption"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Anyone without a Base-compatible USDC wallet or x402 client","Bulk data consumers who would benefit from flat-rate pricing"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:03.537Z"},"updatedAt":"2026-04-22T01:02:20.734Z"}}