{"id":"0516db23-e975-4e78-814e-688522812761","shortId":"JT9kt4","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/71` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-call APIs spanning data analytics, AI/ML, finance, infrastructure, and more. The specific resource at path `/ehr/71` is labeled \"Premium API Access\" but its exact data domain is unclear — the \"ehr\" path segment suggests Electronic Health Records, though the provider's landing page does not list this endpoint among its documented categories and provides no schema or field-level documentation for it.\n\nThe endpoint is live and returns a valid x402 challenge over the Base network. Payment is settled in USDC (contract `0x8335…2913`) with a maximum amount of 20,000 base units, which at 6 decimals equals $0.02 per request. The x402 challenge specifies an `exact` payment scheme, a 300-second timeout, and accepts HTTP POST. No API key or account registration is required; callers authenticate solely via the x402 payment header.\n\nDocumentation is extremely thin. The provider's landing page lists many endpoints at $0.02 each but does not include `/api/v1/ehr/71`. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI spec, no request/response schema, and no example payloads available. Without knowing what fields to POST or what the response contains, integration requires experimentation or direct contact with the provider.","tags":[],"capabilities":["x402-payment","per-call-billing","usdc-settlement","base-network","http-post","no-api-key","ehr-data"],"categories":["data","health"],"synonyms":["electronic health records API","EHR endpoint","health data API","x402 paid API","USDC micropayment API","lowpaymentfee","pay-per-call health data"],"warnings":["The /api/v1/ehr/71 endpoint is not listed among the provider's documented APIs — its availability and purpose are unverified.","'EHR' may imply Electronic Health Records, which is a regulated data category (HIPAA, etc.). No compliance information is provided.","No request or response schema is available; integration requires blind experimentation.","All secondary pages (docs, pricing, API, README) render only 'Connect wallet' with no useful content."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/71","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/71","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is zero documentation on request/response schema, no OpenAPI spec, and the /ehr/71 path is not listed on the provider's own landing page. The purpose of the endpoint is ambiguous and cannot be 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'/ehr/71':69 '0.02':9,26,152,200 '000':144 '0x8335':136 '20':143 '2913':137 '300':164 '6':149 'EHR endpoint' 'USDC micropayment API' 'accept':168 'access':74 'account':175 'addit':223 'ai/ml':59 'among':101 'amount':141 'analyt':58 'api':15,32,55,73,172,210 'authent':180 'avail':237 'base':7,24,128,145 'base-network' 'call':54 'caller':179 'categori':104 'challeng':125,157 'collect':46 'connect':218 'contact':254 'contain':248 'content':224 'contract':135 'data':57,78 'decim':150 'direct':253 'doc':208 'document':103,113,187 'domain':79 'ehr':4,21,83 'ehr-data' 'electron':87 'electronic health records API' 'endpoint':5,22,36,100,117,198 'equal':151 'exact':77,160 'exampl':235 'experiment':251 'extrem':189 'field':111,241 'field-level':110 'financ':60 'gate':3,20 'header':186 'health':88 'health data API' 'http':169 'http-post' 'includ':205 'infrastructur':61 'integr':249 'key':16,33,173 'know':239 'label':71 'land':94,194 'level':112 'list':98,196 'live':119 'lowpaymentfee' 'lowpaymentfee.com':43 'mani':197 'maximum':140 'network':129 'no-api-key' 'openapi':228 'page':95,195,213 'part':40 'path':68,84 'pay':8,25,52 'pay-per-cal':51 'pay-per-call health data' 'payload':236 'payment':130,161,185 'per':10,27,53,153 'per-call-billing' 'platform':44 'post':170,243 'premium':72 'price':209 'prompt':220 'protocol':50 'provid':92,106,192,257 'readm':212 'record':89 'registr':176 'render':215 'request':11,28,154 'request/response':231 'requir':17,34,178,250 'resourc':66 'respons':247 'return':121 'schema':108,232 'scheme':162 'second':165 'segment':85 'settl':132 'sole':181 'span':56 'spec':229 'specif':65 'specifi':158 'suggest':86 'thin':190 'though':90 'timeout':166 'unclear':81 'unit':146 'usdc':13,30,134 'usdc-settlement' 'valid':123 'via':182 'wallet':219 'without':238 'x402':2,19,49,124,156,184 'x402 paid API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':48","prices":[{"id":"05f8f33a-179b-4ec9-8788-b49a503c55c7","listingId":"0516db23-e975-4e78-814e-688522812761","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/71","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:10.472Z"}],"sources":[{"listingId":"0516db23-e975-4e78-814e-688522812761","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/71","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:10.472Z","lastSeenAt":"2026-04-22T15:02:41.252Z"}],"details":{"listingId":"0516db23-e975-4e78-814e-688522812761","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/71 \\\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 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/ehr/71"},{"claim":"The provider lists many endpoints at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The /api/v1/ehr/71 endpoint is not listed among the provider's documented API categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 uses 6 decimals on Base","source_url":"https://lowpaymentfee.com/api/v1/ehr/71"}],"useCases":["Retrieving health record data (EHR) on a per-request payment basis","Integrating pay-per-call medical data into agent workflows","Accessing premium data without API key registration"],"bestFor":["Agents that can settle x402 payments in USDC on Base","Use cases needing on-demand health/EHR data without subscription commitments","Developers exploring x402 protocol integrations"],"notFor":["Production healthcare applications requiring documented schemas and compliance guarantees","Users who cannot transact in USDC on the Base network","High-volume batch retrieval where per-call pricing is inefficient"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:22.168Z"},"updatedAt":"2026-04-22T15:02:41.252Z"}}