{"id":"911ac052-395e-408c-9590-58d7410c4e57","shortId":"dmPtyK","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 \"lab results\" data at the path `/api/v1/lab/results/94`. It is 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 specific resource at `/api/v1/lab/results/94` is labeled \"Premium API Access\" in the x402 challenge. The endpoint accepts POST requests and returns `application/json`. Payment is handled via the x402 protocol: callers must include an `X-PAYMENT` header with a valid payment proof. The max amount required is 20,000 base units of USDC (0x8335…on Base), which equals $0.02 given USDC's 6 decimals. No API keys or rate limits are advertised; access is gated purely by micropayment.\n\nThe platform's landing page lists categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure, each with multiple endpoints at the same $0.02 price point. However, no OpenAPI schema, detailed documentation, or example request/response payloads are available for this specific endpoint. The exact data returned by `/api/v1/lab/results/94` is not documented — the name \"lab results\" and the numeric ID suggest it may return a specific dataset or test result, but this is unconfirmed.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","json-response","post-method","pay-per-call","no-api-key"],"categories":["data","api-infrastructure"],"synonyms":["lab results API","x402 micropayment API","pay-per-request endpoint","USDC API access","Base network API","lowpaymentfee API","402 payment API"],"warnings":["No documentation or schema available for /api/v1/lab/results/94 — the actual data returned is unknown.","The term 'lab results' is unexplained; it could refer to test data, scientific results, or placeholder content.","No OpenAPI spec, no example payloads, and no README content was accessible.","The broader platform lists many endpoints but none have detailed docs in the crawl."],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/94","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/94","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, there is no documentation, no OpenAPI schema, no example request/response, and the purpose of 'lab results/94' is entirely opaque. The crawl pages beyond the landing page returned only 'Connect wallet' with no useful 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'0.02':12,28,77,146,190 '000':136 '0x8335':141 '20':135 '402 payment API' '6':150 'Base network API' 'USDC API access' 'accept':104 'access':97,160 'advertis':159 'ai':176 'ai/ml':67 'amount':132 'analyt':66,175 'api':62,96,153 'application/json':109 'avail':204 'base':9,25,86,137,143 'base-network' 'broader':53 'call':4,20,61 'caller':117 'categori':172 'challeng':101 'data':43,65,70,174,211 'dataset':232 'decim':151 'detail':197 'document':198,217 'dozen':56 'enabl':36 'endpoint':7,23,37,63,103,186,208 'equal':145 'exact':210 'exampl':200 'financ':179 'finance/web3':69 'gate':162 'given':147 'handl':112 'header':124 'howev':193 'id':225 'includ':119,173 'infer':68 'infrastructur':72,182 'json-response' 'key':154 'lab':5,21,41,220 'lab results API' 'label':94 'land':169 'learn':178 'limit':157 'list':171 'lowpaymentfee API' 'lowpaymentfee.com':39 'machin':177 'max':131 'may':228 'micropay':165 'multipl':185 'must':118 'name':219 'network':87 'no-api-key' 'numer':224 'offer':55 'openapi':195 'page':170 'part':50 'path':46 'pay':2,18,59 'pay-per-cal':1,17,58 'pay-per-call' 'pay-per-request endpoint' 'payload':202 'payment':110,123,128 'per':3,13,19,29,60,78 'platform':54,167 'point':192 'post':105 'post-method' 'premium':95 'price':75,191 'proof':129 'protocol':116 'pure':163 'rate':156 'request':14,30,79,106 'request/response':201 'requir':133 'resourc':90 'result':6,22,42,221,235 'return':108,212,229 'schema':196 'serv':40 'settl':81 'span':64 'specif':89,207,231 'suggest':226 'test':234 'unconfirm':239 'unit':138 'usdc':16,32,83,140,148 'usdc-micropayment' 'util':73 'valid':127 'via':10,26,113 'web3':180 'x':122 'x-payment':121 'x402':11,27,35,100,115 'x402 micropayment API' 'x402-enabled':34 'x402-payment'","prices":[{"id":"c35d2715-1cb5-44e3-bb0c-b9c07921b5da","listingId":"911ac052-395e-408c-9590-58d7410c4e57","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/94","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:25.115Z"}],"sources":[{"listingId":"911ac052-395e-408c-9590-58d7410c4e57","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/lab/results/94","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:25.115Z","lastSeenAt":"2026-04-22T21:32:13.676Z"}],"details":{"listingId":"911ac052-395e-408c-9590-58d7410c4e57","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/lab/results/94 \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge requiring USDC payment on Base network with maxAmountRequired of 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/lab/results/94"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/lab/results/94"}],"useCases":["Retrieving lab results or dataset #94 via a single micropayment","Demonstrating x402 protocol integration for pay-per-call APIs","Programmatic access to premium data without subscription or API key management"],"bestFor":["Agents or developers experimenting with x402 micropayment protocols","Use cases requiring keyless, pay-as-you-go API access on Base","Low-volume consumers who want to avoid subscriptions"],"notFor":["Users needing well-documented, schema-defined API contracts","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone requiring non-USDC or non-Base payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:03.086Z"},"updatedAt":"2026-04-22T21:32:13.676Z"}}