{"id":"1e1a1787-9b37-46c7-bb1d-5f5f89a94d0b","shortId":"t6Q4yB","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/85` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-call APIs settled in USDC on the Base network. The specific resource at path `/ehr/85` is labeled \"Premium API Access\" in the x402 challenge but its exact functionality is unclear — the \"ehr\" path segment suggests Electronic Health Records, though the provider's landing page does not list or document this particular endpoint among its advertised categories (Data & Analytics, AI & ML, Finance & Web3, Infrastructure).\n\nThe endpoint is live and returns a valid x402 challenge (HTTP 402) requesting payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 USD (USDC uses 6 decimals). Payment is via the x402 \"exact\" scheme, with a 300-second timeout. The platform advertises a flat $0.02/request pricing across all endpoints, no API keys, no rate limits, and instant access.\n\nDocumentation is extremely sparse. The /docs, /pricing, /api, and /README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no description of what data this endpoint actually returns. The \"ehr/85\" path is not mentioned anywhere on the site's landing page. Without documentation or example responses, the actual payload and use case remain unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","http-post"],"categories":["health","data"],"synonyms":["electronic health records","EHR API","medical records API","health data endpoint","x402 EHR","lowpaymentfee","pay-per-call health API"],"warnings":["The /ehr/85 endpoint is not listed or documented anywhere on the provider's landing page or docs.","All documentation pages (/docs, /pricing, /api, /README) return only a 'Connect wallet' prompt with no content.","The 'ehr' path suggests Electronic Health Records, which is a regulated data category — no compliance or privacy information is provided.","No request body schema or response schema is available; actual functionality is unknown.","No OpenAPI specification found."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/85","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/85","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.200","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is zero documentation on what /api/v1/ehr/85 actually does or returns. No OpenAPI spec, no request/response schema, no examples, and the endpoint isn't even listed on the provider's own landing page. Effectively a 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'/api/v1/ehr/85':38 '/docs':189 '/ehr/85':68 '/pricing':190 '/readme':193 '/request':170 '0.02':9,26,146,169 '000':135 '0x8335':140 '20':134 '2913':141 '300':161 '402':128 '6':150 'EHR API' 'access':73,183 'across':172 'actual':222,243 'advertis':108,166 'ai':112 'among':106 'analyt':111 'anywher':230 'api':15,32,55,72,176 'base':7,24,61,136,143 'base-network' 'call':54 'case':247 'categori':109 'challeng':77,126 'collect':46 'connect':199 'content':205 'data':110,219 'decim':151 'descript':216 'document':102,184,238 'ehr':4,21,85 'ehr/85':225 'electron':89 'electronic health records' 'endpoint':5,22,36,105,118,174,221 'equal':145 'exact':80,157 'exampl':240 'extrem':186 'financ':114 'flat':168 'function':81 'gate':3,20 'health':90 'health data endpoint' 'http':127 'http-post' 'infrastructur':116 'instant':182 'key':16,33,177 'label':70 'land':96,235 'limit':180 'list':100 'live':120 'lowpaymentfee' 'lowpaymentfee.com':43 'medical records API' 'mention':229 'ml':113 'network':62 'no-api-key' 'openapi':209 'page':97,194,236 'part':40 'particular':104 'path':67,86,226 'pay':8,25,52 'pay-per-cal':51 'pay-per-call health API' 'pay-per-request' 'payload':244 'payment':130,152 'per':10,27,53 'platform':44,165 'premium':71 'price':171 'prompt':201 'protocol':50 'provid':94 'rate':179 'record':91 'remain':248 'request':11,28,129 'request/response':212 'requir':17,34 'resourc':65 'respons':241 'return':122,196,223 'schema':213 'scheme':158 'second':162 'segment':87 'settl':56 'site':233 'spars':187 'spec':210 'specif':64 'substant':204 'suggest':88 'though':92 'timeout':163 'unclear':83 'unit':137 'unknown':249 'usd':147 'usdc':13,30,58,139,148 'usdc-settlement' 'use':149,246 'valid':124 'via':154 'wallet':200 'web3':115 'without':237 'x402':2,19,49,76,125,156 'x402 EHR' 'x402-gated':1,18 'x402-payment' 'x402-protocol':48","prices":[{"id":"9677f18a-6604-4ce4-bbac-1a9c0a7341a8","listingId":"1e1a1787-9b37-46c7-bb1d-5f5f89a94d0b","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/85","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:10.639Z"}],"sources":[{"listingId":"1e1a1787-9b37-46c7-bb1d-5f5f89a94d0b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/85","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:10.639Z","lastSeenAt":"2026-04-22T13:32:09.224Z"}],"details":{"listingId":"1e1a1787-9b37-46c7-bb1d-5f5f89a94d0b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/85 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ehr/85"},{"claim":"The platform advertises $0.02/request pricing, no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/ehr/85"},{"claim":"Documentation pages (/docs, /pricing, /api, /README) returned only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving health record data (EHR) via a single pay-per-call request","Programmatic access to structured health information without subscription","Agent-driven medical data retrieval settled in USDC on Base"],"bestFor":["Developers needing low-cost, keyless access to health record data","AI agents that can settle x402 micropayments on Base","Prototyping health data integrations without subscription commitments"],"notFor":["Production healthcare systems requiring HIPAA-compliant, documented APIs","Users who need detailed API documentation and response schemas before integrating","Anyone needing non-crypto payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:21.974Z"},"updatedAt":"2026-04-22T13:32:09.224Z"}}