{"id":"90ec7c18-3e24-4f5a-a28e-8d7e18a9c37e","shortId":"geSWBN","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/67` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. Each call is settled on the Base network using USDC with no API keys, no rate limits, and no subscriptions — just a per-request micropayment of $0.02.\n\nThe specific endpoint `/api/v1/lab/results/67` is listed under the title \"Premium API Access\" and accepts HTTP POST requests. The x402 challenge confirms it is live, requiring a maximum of 20,000 base units of USDC (i.e., $0.02) per call, paid to address `0x1A2B…85F3` on Base. The response MIME type is `application/json`. However, the exact nature of the data returned by this particular \"lab/results\" path is not documented in the crawled material — the endpoint does not appear in the site's publicly listed API catalog, so its purpose must be inferred or discovered by calling it.\n\nThe broader lowpaymentfee.com platform advertises categories including metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. No OpenAPI schema or detailed request/response documentation was found during the crawl.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key","http-post"],"categories":["data","api-marketplace"],"synonyms":["lab results API","lowpaymentfee","micropayment API","x402 endpoint","pay-per-call API","USDC API","Base network API"],"warnings":["The endpoint path /api/v1/lab/results/67 does not appear in the provider's publicly listed API catalog — its exact purpose is unknown.","No OpenAPI spec, request schema, or response schema is available.","No documentation pages returned meaningful content (pricing, README, and /api pages only showed 'Connect wallet').","The 'lab/results' naming suggests possible health/medical data — verify regulatory compliance if applicable."],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/67","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/67","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 confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and the specific purpose of /api/v1/lab/results/67 is undocumented — it doesn't appear in the site's own catalog. This is effectively a stub listing with verified liveness but minimal usable 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