{"id":"a631532b-a0a3-4f3b-b571-00f8e5002f22","shortId":"cG9cVA","kind":"x402","title":"Pay-per-call lab results endpoint on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call lab results endpoint on Base via x402, settled in USDC at $0.02/request.","description":"This x402-enabled endpoint at `/api/v1/lab/results/46` is part of the lowpaymentfee.com platform, which offers a broad suite of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. All endpoints use the x402 payment protocol on the Base network, accepting USDC (USD Coin) for micropayments.\n\nThe specific endpoint `/api/v1/lab/results/46` is listed under the title \"Premium API Access\" but its exact data payload is not documented in the crawled material. The provider's landing page groups endpoints into categories like Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure, all priced uniformly at $0.02 per request. The x402 challenge for this endpoint confirms a `maxAmountRequired` of 20,000 base units of USDC (6 decimals), which equals $0.02. Payment is made via the `exact` scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base.\n\nThe platform advertises no API keys, no rate limits, and instant access. There is no OpenAPI schema, no detailed documentation for this specific endpoint, and the crawled /api, /pricing, and /README pages returned only a \"Connect wallet\" prompt with no additional content. The response format is `application/json` per the x402 challenge, but the actual response schema is unknown.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","pay-per-request","json-response","no-api-key"],"categories":["data","api-marketplace"],"synonyms":["lab results API","premium API access","lowpaymentfee","micropayment API","x402 endpoint","pay-per-call API","USDC API"],"warnings":["No documentation exists for /api/v1/lab/results/46 — the purpose and response schema of this endpoint are unknown.","The crawled /api, /pricing, and /README pages contain no useful content beyond 'Connect wallet'.","No OpenAPI spec or output schema is available for any endpoint on this platform.","The endpoint path '/lab/results/46' suggests a specific resource ID; it is unclear whether other IDs are valid or what 'lab results' refers to."],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/46","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/46","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), but there is no documentation for this specific endpoint's purpose, request parameters, or response schema. The /api, /pricing, and /README pages are empty beyond a wallet prompt. The listing is effectively a stub with confirmed 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'/api/v1/lab/results/46':41,89 '/pricing':197 '/readme':199 '/request':17,34 '0.02':16,33,133,156 '000':147 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':166 '20':146 '6':152 'USDC API' 'accept':80 'access':97,180 'actual':222 'addit':209 'address':165 'advertis':171 'ai':122 'ai/ml':62 'analyt':61,121 'api':58,96,173 'application/json':215 'base':9,26,78,148,168 'base-network' 'broad':51 'call':4,21 'categori':118 'challeng':138,219 'coin':83 'confirm':142 'connect':204 'content':210 'crawl':108,195 'data':60,65,101,120 'decim':153 'detail':187 'document':105,188 'enabl':38 'endpoint':7,24,39,70,88,116,141,192 'equal':155 'exact':100,162 'financ':125 'finance/web3':64 'format':213 'group':115 'infer':63 'infrastructur':67,128 'instant':179 'json-response' 'key':174 'lab':5,22 'lab results API' 'land':113 'learn':124 'like':119 'limit':177 'list':91 'lowpaymentfee' 'lowpaymentfee.com':46 'machin':123 'made':159 'materi':109 'maxamountrequir':144 'micropay':85 'micropayment API' 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Include X-PAYMENT header with valid USDC payment on Base to receive the JSON response.","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/lab/results/46"},{"claim":"All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/lab/results/46"}],"useCases":["Fetching lab or analytical results behind a per-call paywall","Demonstrating x402 micropayment integration on Base","Agent-driven data retrieval with no subscription or API key required"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-use API access on Base","Low-volume consumers who want no subscription commitments"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume batch consumers who would benefit from bulk pricing","Anyone needing non-USDC or non-Base payment settlement"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:03.679Z"},"updatedAt":"2026-04-22T01:02:20.573Z"}}