{"id":"3bcb47b4-549a-49fd-8a44-53b9b767dcdf","shortId":"X44K7Y","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 endpoint at lowpaymentfee.com provides access to a specific lab result resource (ID 92) behind an x402 paywall. It is part of a broader platform offering dozens of pay-per-request 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/92` is listed under the title \"Premium API Access\" but the crawled site does not enumerate a \"lab\" category or explain what data this particular endpoint returns. The platform's homepage advertises categories like Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure, but lab results are not among them. It is possible this is a test or demonstration endpoint.\n\nPayment is handled via the x402 protocol: callers receive a 402 challenge specifying USDC (contract `0x8335…2913`) on Base with a `maxAmountRequired` of 20000 base units, which equals $0.02 (USDC uses 6 decimals). No API keys or rate limits are advertised. The endpoint accepts POST requests and returns `application/json`. No OpenAPI schema, request body schema, or response schema is documented beyond the x402 challenge metadata.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key","post-method"],"categories":["data","misc"],"synonyms":["lab results API","lowpaymentfee","x402 API","USDC micropayment API","pay-per-call API","Base network API","premium data endpoint"],"warnings":["The endpoint path /api/v1/lab/results/92 is not listed on the provider's homepage among available APIs — it may be a test or unlisted resource.","No request body schema or response schema is documented; callers cannot know what to send or what they will receive.","No OpenAPI spec, README, or detailed documentation was found (crawled pages returned only 'Connect wallet').","The nature of 'lab results' data is completely undocumented."],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/92","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/92","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation of what this specific endpoint returns, no request/response schema, and the 'lab/results/92' path is not listed anywhere on the provider's site. Effectively a stub with working payment infrastructure but unknown 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'pay-per-cal':1,18 'pay-per-call API' 'pay-per-request':63 'payment':157 'paywal':52 'per':3,20,65,83 'platform':59,125 'possibl':149 'post':201 'post-method' 'premium':103 'premium data endpoint' 'price':80 'protocol':163 'provid':39 'rate':194 'receiv':165 'request':66,84,202,209 'resourc':46,95 'respons':213 'result':6,23,45,142 'return':123,204 'schema':208,211,214 'settl':12,29,86 'site':109 'span':69 'specif':43,94 'specifi':169 'test':153 'titl':102 'unit':182 'usdc':14,31,88,170,186 'usdc-settlement' 'use':187 'util':78 'via':10,27,160 'web3':137 'x402':11,28,51,162,219 'x402 API' 'x402-payment'","prices":[{"id":"baeea966-a7ce-44eb-ba8c-3db09ab68f6a","listingId":"3bcb47b4-549a-49fd-8a44-53b9b767dcdf","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/92","description":"Premium API 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<x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and settlement on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge specifies USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base with maxAmountRequired of 20000 base units ($0.02).","source_url":"https://lowpaymentfee.com/api/v1/lab/results/92"},{"claim":"Available API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure.","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving lab result data (ID 92) via a single paid API call","Demonstrating x402 payment flow for agent-to-API micropayments","Integrating pay-per-request data access without API key management"],"bestFor":["Developers experimenting with x402 payment protocol on Base","Agents that need keyless, pay-per-call API access","Testing micropayment-gated data retrieval workflows"],"notFor":["Production use cases requiring documented request/response schemas","Bulk data retrieval where per-call pricing is inefficient","Users who need to understand what 'lab results' data actually contains before paying"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:03.164Z"},"updatedAt":"2026-04-22T02:32:04.962Z"}}