{"id":"97fe3d3b-9408-4fb7-a954-20b804a33abf","shortId":"n275Nk","kind":"x402","title":"Pay-per-call lab results endpoint on Base via x402 — $0.02 per request in USDC.","tagline":"Pay-per-call lab results endpoint on Base via x402 — $0.02 per request in USDC.","description":"This x402-enabled endpoint at lowpaymentfee.com serves premium API results at the path `/api/v1/lab/results/1`. It is part of a broader platform offering dozens of pay-per-call endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network. No API keys or accounts are required; callers simply attach an x402 payment header to each POST request.\n\nThe specific `/api/v1/lab/results/1` endpoint is listed under the title \"Premium API Access\" but its exact response payload is not documented in the crawled material. The x402 challenge confirms it is live, accepts USDC (contract `0x8335…2913` on Base), and charges a maximum of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The payment timeout is 300 seconds. The platform advertises no rate limits, no minimums, and instant access.\n\nBecause the crawled site provides no detailed documentation for this particular endpoint — no request schema, no response examples, and no explanation of what \"lab results\" means — the actual data returned is unknown. The broader site lists many endpoint categories but the `/api/v1/lab/results/1` path does not appear among them, suggesting it may be a test or demonstration endpoint. Prospective callers should be aware of this ambiguity.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-call","no-api-key","json-response","post-method"],"categories":["data","api-infrastructure"],"synonyms":["lab results API","premium API access","lowpaymentfee","x402 USDC endpoint","pay-per-request API","Base network API","micropayment API"],"warnings":["No documentation exists for the /api/v1/lab/results/1 path — its purpose and response format are unknown.","This endpoint does not appear in the provider's own listed API catalog, suggesting it may be a test or unlisted route.","No OpenAPI spec, no response examples, and no request body schema are available."],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/1","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/1","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 via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation for this specific path, no request/response schema, and no explanation of what data it returns. The listing is essentially a stub with verified 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'0.02':12,28,76,152 '000':148 '0x8335':138 '20':147 '2913':139 '300':162 '6':156 'Base network API' 'accept':135 'access':115,174 'account':90 'actual':202 'advertis':166 'ai/ml':66 'ambigu':239 'among':221 'analyt':65 'api':42,87,114 'appear':220 'attach':95 'awar':236 'base':9,25,84,141,149 'broader':53,208 'call':4,20,61 'caller':93,233 'categori':213 'challeng':130 'charg':143 'confirm':131 'contract':137 'crawl':126,177 'data':64,69,203 'decim':157 'demonstr':230 'detail':181 'document':123,182 'dozen':56 'enabl':36 'endpoint':7,23,37,62,107,186,212,231 'exact':118 'exampl':192 'explan':195 'finance/web3':68 'given':153 'header':99 'i.e':151 'infer':67 'infrastructur':71 'instant':173 'json-response' 'key':88 'lab':5,21,198 'lab results API' 'limit':169 'list':109,210 'live':134 'lowpaymentfee' 'lowpaymentfee.com':39 'mani':211 'materi':127 'maximum':145 'may':225 'mean':200 'micropayment API' 'minimum':171 'network':85 'no-api-key' 'offer':55 'part':50 'particular':185 'path':46,217 'pay':2,18,59 'pay-per-cal':1,17,58 'pay-per-call' 'pay-per-request API' 'payload':120 'payment':98,159 'per':3,13,19,29,60,77 'platform':54,165 'post':102 'post-method' 'premium':41,113 'premium API access' 'price':74 'prospect':232 'provid':179 'rate':168 'request':14,30,78,103,188 'requir':92 'respons':119,191 'result':6,22,43,199 'return':204 'schema':189 'second':163 'serv':40 'settl':79 'simpli':94 'site':178,209 'span':63 'specif':105 'suggest':223 'test':228 'timeout':160 'titl':112 'unit':150 'unknown':206 'usdc':16,32,81,136,154 'usdc-base' 'util':72 'via':10,26 'x402':11,27,35,97,129 'x402 USDC endpoint' 'x402-enabled':34 'x402-payment'","prices":[{"id":"3d446b85-6b9d-46f6-b5af-e8cc23605731","listingId":"97fe3d3b-9408-4fb7-a954-20b804a33abf","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/1","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:23.948Z"}],"sources":[{"listingId":"97fe3d3b-9408-4fb7-a954-20b804a33abf","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/lab/results/1","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:23.948Z","lastSeenAt":"2026-04-23T06:32:03.871Z"}],"details":{"listingId":"97fe3d3b-9408-4fb7-a954-20b804a33abf","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/lab/results/1 \\\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 challenge requesting USDC on Base with maxAmountRequired of 20000 base units ($0.02).","source_url":"https://lowpaymentfee.com/api/v1/lab/results/1"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","source_url":"https://lowpaymentfee.com/api/v1/lab/results/1"}],"useCases":["Retrieving lab or test result data via a single paid API call","Demonstrating x402 payment flows on Base with USDC","Integrating pay-per-call data access into agent workflows without API key management"],"bestFor":["Developers exploring x402 payment protocol integrations","Agents needing keyless, pay-as-you-go API access on Base","Testing micropayment-gated endpoint consumption"],"notFor":["Users who need detailed documentation or guaranteed SLAs before calling","High-volume batch retrieval where per-call pricing is inefficient"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:04.896Z"},"updatedAt":"2026-04-23T06:32:03.871Z"}}