{"id":"e095ccd0-f9bf-45db-b3ed-e827b2f087e0","shortId":"MnaHN9","kind":"x402","title":"x402-gated EHR endpoint on Base, pay $0.02 per request in USDC — no API keys required.","tagline":"x402-gated EHR endpoint on Base, pay $0.02 per request in USDC — no API keys required.","description":"This endpoint at `/api/v1/ehr/94` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-request APIs settled in USDC on the Base network. The specific resource at path `/ehr/94` is labeled \"Premium API Access\" and accepts POST requests. The x402 challenge confirms it is live, requiring a maximum of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per call (USDC uses 6 decimals). Payment is made via the x402 exact scheme with a 300-second timeout.\n\nThe broader lowpaymentfee.com platform advertises categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all at the same $0.02/request price point. However, the `/ehr/94` path does not appear in any of the documented API categories on the landing page, and no documentation describes what \"EHR\" stands for or what data this specific endpoint returns. The path suggests Electronic Health Records, but this is unconfirmed. No OpenAPI schema, request/response examples, or detailed docs were found for this endpoint. The docs, pricing, and API pages all rendered only a \"Connect wallet\" prompt with no additional content.\n\nBecause the endpoint is confirmed live (402 challenge captured) but lacks any documentation about its purpose, expected input, or output format, consumers should treat this as an opaque endpoint until further information is available.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","post-endpoint","no-api-key"],"categories":["data","health"],"synonyms":["EHR API","electronic health records","lowpaymentfee","x402 health data","paid API Base USDC","premium API access"],"warnings":["The /ehr/94 path is not listed among the provider's documented APIs — its purpose is unknown.","'EHR' may refer to Electronic Health Records, which is a regulated data category; no compliance or data-source information is provided.","No OpenAPI spec, request schema, or response schema is available for this endpoint.","Docs, pricing, and API pages returned only a 'Connect wallet' prompt with no substantive content."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/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/ehr/94","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is zero documentation on what /ehr/94 actually returns, no request/response schema, and the path does not appear in the provider's own listed APIs. This is effectively a stub 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'/ehr/94':68,148 '/request':143 '0.02':9,26,101,142 '000':90 '0x8335':95 '20':89 '2913':96 '300':118 '402':225 '6':106 'EHR API' 'accept':75 'access':73 'addit':217 'advertis':125 'ai':130 'analyt':129 'api':15,32,55,72,158,206 'appear':152 'avail':252 'base':7,24,61,91,98 'base-network' 'broader':122 'call':103 'captur':227 'categori':126,159 'challeng':80,226 'collect':46 'confirm':81,223 'connect':212 'consum':240 'content':218 'data':128,174 'decim':107 'describ':167 'detail':195 'doc':196,203 'document':157,166,231 'ehr':4,21,169 'electron':182 'electronic health records' 'endpoint':5,22,36,177,201,221,247 'equal':100 'exact':114 'exampl':193 'expect':235 'financ':133 'format':239 'found':198 'gate':3,20 'health':183 'howev':146 'includ':127 'inform':250 'infrastructur':136 'input':236 'key':16,33 'label':70 'lack':229 'land':162 'learn':132 'live':84,224 'lowpaymentfee' 'lowpaymentfee.com':43,123 'machin':131 'made':110 'maximum':87 'network':62 'no-api-key' 'opaqu':246 'openapi':190 'output':238 'page':163,207 'paid API Base USDC' 'part':40 'path':67,149,180 'pay':8,25,52 'pay-per-request':51 'payment':108 'per':10,27,53,102 'platform':44,124 'point':145 'post':76 'post-endpoint' 'premium':71 'premium API access' 'price':144,204 'prompt':214 'protocol':50 'purpos':234 'record':184 'render':209 'request':11,28,54,77 'request/response':192 'requir':17,34,85 'resourc':65 'return':178 'schema':191 'scheme':115 'second':119 'settl':56 'specif':64,176 'stand':170 'suggest':181 'timeout':120 'treat':242 'unconfirm':188 'unit':92 'usdc':13,30,58,94,104 'usdc-settlement' 'use':105 'util':137 'via':111 'wallet':213 'web3':134 'x402':2,19,49,79,113 'x402 health data' 'x402-gated':1,18 'x402-payment' 'x402-protocol':48","prices":[{"id":"6e11b348-b564-4ffa-b687-406f80f6b79a","listingId":"e095ccd0-f9bf-45db-b3ed-e827b2f087e0","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/ehr/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":"2026-04-21T18:32:10.344Z"}],"sources":[{"listingId":"e095ccd0-f9bf-45db-b3ed-e827b2f087e0","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/94","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:10.344Z","lastSeenAt":"2026-04-22T15:02:41.044Z"}],"details":{"listingId":"e095ccd0-f9bf-45db-b3ed-e827b2f087e0","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/94 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge returns maxAmountRequired 20000 in USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02 per request.","source_url":"https://lowpaymentfee.com/api/v1/ehr/94"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The /ehr/94 path does not appear in the provider's listed API categories (Data & Analytics, AI & ML, Finance & Web3, Infrastructure).","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving data from the /ehr/94 resource via x402 micropayment","Programmatic pay-per-call access without API key management","Agent-driven data retrieval settled on Base L2 in USDC"],"bestFor":["Developers experimenting with x402 pay-per-request protocols","Agents that can settle USDC payments on Base automatically","Use cases where keyless, per-call billing is preferred"],"notFor":["Anyone needing documented, well-specified health data APIs with compliance guarantees","High-volume consumers who need bulk pricing or rate-limit clarity"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:22.346Z"},"updatedAt":"2026-04-22T15:02:41.044Z"}}