{"id":"e5e16f2c-bac8-46fa-8598-76b1f18c3504","shortId":"n5mMey","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 87) 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/87` is listed under the title \"Premium API Access\" but its exact data payload is undocumented. The x402 challenge confirms the endpoint is live, accepts POST requests, and requires a payment of up to 20,000 base units of USDC (0x8335…) on Base, which equals $0.02 USD (USDC uses 6 decimals). Payment is made via the x402 exact scheme with a 300-second timeout. No API keys or rate limits are advertised; access is granted purely through per-call micropayment.\n\nThe broader lowpaymentfee.com platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, and more — all at the same $0.02 price point. However, this specific listing covers only the `/api/v1/lab/results/87` resource. Documentation is minimal: the site's /api, /pricing, and /README pages all resolve to a \"Connect wallet\" prompt with no further detail, and no OpenAPI spec or response schema is available.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key"],"categories":["data","api-marketplace"],"synonyms":["lab results API","pay-per-call API","x402 micropayment endpoint","USDC API","Base network API","lowpaymentfee","premium data access"],"warnings":["No documentation available for this specific endpoint — /api, /pricing, and /README all return only a 'Connect wallet' prompt","The resource path /api/v1/lab/results/87 does not appear in the site's listed API catalog, making its purpose unclear","No response schema or example output is provided; the actual data returned is unknown","The term 'lab results' could imply medical/health data, which may carry regulatory implications (HIPAA, etc.) — but there is no evidence this is medical data"],"endpointUrl":"https://lowpaymentfee.com/api/v1/lab/results/87","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/87","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no documentation on what the response payload contains, no OpenAPI spec, no example requests or responses, and the specific resource path (/api/v1/lab/results/87) is not listed on the site's landing page. The 'lab results' category is not mentioned anywhere in the crawled content, making the actual purpose 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'pay-per-call API' 'pay-per-request':63 'payload':110 'payment':127,148 'paywal':52 'per':3,20,65,83,175 'per-cal':174 'platform':59,181 'point':205 'post':122 'premium':103 'premium data access' 'price':80,191,204 'prompt':232 'provid':39 'pure':172 'rate':165,194 'request':66,84,123 'requir':125 'resolv':227 'resourc':46,95,214 'respons':242 'result':6,23,45 'schema':243 'scheme':155 'second':159 'sentiment':185 'settl':12,29,86 'site':219 'span':69 'spec':240 'specif':43,94,208 'summar':188 'text':187 'timeout':160 'titl':102 'undocu':112 'unit':134 'usd':143 'usdc':14,31,88,136,144 'usdc-settlement' 'use':145 'util':78 'valid':196 'via':10,27,151 'wallet':231 'x402':11,28,51,114,153 'x402 micropayment endpoint' 'x402-payment'","prices":[{"id":"d2a6a5da-83b3-43ac-8c26-3ca57b6987d5","listingId":"e5e16f2c-bac8-46fa-8598-76b1f18c3504","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/87","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 x402 challenge confirms the endpoint is live, accepts POST, and requires up to 20,000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/lab/results/87"},{"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 contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/lab/results/87"},{"claim":"The /api, /pricing, and /README pages resolve only to a 'Connect wallet' prompt with no further documentation","source_url":"https://lowpaymentfee.com/api"}],"useCases":["Retrieving lab result data for record ID 87 via a single micropayment","Demonstrating x402 pay-per-call integration on Base","Agent-driven data retrieval without API key management"],"bestFor":["Developers experimenting with x402 micropayment protocols","AI agents that need keyless, pay-per-call data access","Users who want to avoid subscription commitments for occasional API calls"],"notFor":["Users needing detailed documentation or response schema before integrating","Bulk data retrieval where per-call pricing becomes expensive at scale","Anyone requiring non-USDC or non-Base-network payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:03.212Z"},"updatedAt":"2026-04-22T01:02:21.111Z"}}