{"id":"6eb63029-4bb3-4855-8ee3-6cce16a773c9","shortId":"xdpzYK","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/33` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance, and infrastructure utilities. The specific `/ehr/33` path suggests an Electronic Health Record (EHR) resource, though the provider's landing page does not list this particular endpoint among its documented API categories, and no further documentation about its schema, input parameters, or response format is available.\n\nThe endpoint is live and returns a valid x402 challenge (HTTP 402) requesting payment in USDC on the Base network. The `maxAmountRequired` is 20,000 base units of USDC (6 decimals), which equals $0.02 per request — consistent with the platform's uniform $0.02/request pricing. Payment is made via the x402 `exact` scheme to the specified wallet address, with a 300-second timeout. No API keys, rate limits, or upfront commitments are required; callers simply attach an `X-PAYMENT` header with a valid x402 payment proof.\n\nBecause the crawled documentation pages (docs, pricing, README) all resolve to a minimal \"Connect wallet\" prompt with no substantive content, and the `/api/v1/ehr/33` path is not mentioned on the landing page, the actual data returned by this endpoint is unknown. Callers should treat this as a lightly-documented endpoint and test with a single paid request to discover the response schema.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","ehr-data","no-api-key","http-post"],"categories":["health","data"],"synonyms":["electronic health record","EHR API","health data endpoint","x402 EHR","lowpaymentfee EHR","medical records API","USDC pay-per-call"],"warnings":["The /api/v1/ehr/33 path is not listed among the provider's documented APIs on the landing page — its existence and purpose are unconfirmed beyond the 402 challenge.","All documentation pages (/docs, /pricing, /README, /api) return only a 'Connect wallet' stub with no substantive content.","If this endpoint returns actual electronic health records, it may be subject to HIPAA or other health-data regulations — the provider gives no compliance information.","No input or output schema is documented; callers must discover the response format empirically."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/33","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/33","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but the specific /ehr/33 path is not documented anywhere on the provider's site. No input schema, output schema, or example responses are available. Documentation pages are empty stubs. The endpoint's actual functionality is unverifiable from available 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'/ehr/33':67 '/request':150 '0.02':9,26,140,149 '000':131 '20':130 '300':167 '402':118 '6':136 'EHR API' 'USDC pay-per-call' 'actual':226 'address':164 'ai/ml':59 'among':88 'analyt':58 'api':15,32,55,91,171 'attach':182 'avail':106 'base':7,24,125,132 'caller':180,234 'categori':92 'challeng':116 'collect':46 'commit':177 'connect':207 'consist':143 'content':213 'crawl':196 'data':57,227 'decim':137 'discov':252 'doc':199 'document':90,96,197,242 'ehr':4,21,74 'ehr-data' 'electron':71 'electronic health record' 'endpoint':5,22,36,87,108,231,243 'equal':139 'exact':158 'financ':61 'format':104 'gate':3,20 'header':187 'health':72 'health data endpoint' 'http':117 'http-post' 'infer':60 'infrastructur':63 'input':100 'key':16,33,172 'land':80,223 'light':241 'lightly-docu':240 'limit':174 'list':84 'live':110 'lowpaymentfee EHR' 'lowpaymentfee.com':43 'made':154 'maxamountrequir':128 'medical records API' 'mention':220 'minim':206 'network':126 'no-api-key' 'page':81,198,224 'paid':249 'paramet':101 'part':40 'particular':86 'path':68,217 'pay':8,25,52 'pay-per-request':51 'payment':120,152,186,192 'per':10,27,53,141 'platform':44,146 'price':151,200 'prompt':209 'proof':193 'protocol':50 'provid':78 'rate':173 'readm':201 'record':73 'request':11,28,54,119,142,250 'requir':17,34,179 'resolv':203 'resourc':75 'respons':103,254 'return':112,228 'schema':99,255 'scheme':159 'second':168 'simpli':181 'singl':248 'span':56 'specif':66 'specifi':162 'substant':212 'suggest':69 'test':245 'though':76 'timeout':169 'treat':236 'uniform':148 'unit':133 'unknown':233 'upfront':176 'usdc':13,30,122,135 'usdc-base' 'util':64 'valid':114,190 'via':155 'wallet':163,208 'x':185 'x-payment':184 'x402':2,19,49,115,157,191 'x402 EHR' 'x402-gated':1,18 'x402-payment' 'x402-protocol':48","prices":[{"id":"4e174eed-c42b-4e9c-97ab-ce959a60512a","listingId":"6eb63029-4bb3-4855-8ee3-6cce16a773c9","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/33","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:09.888Z"}],"sources":[{"listingId":"6eb63029-4bb3-4855-8ee3-6cce16a773c9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/33","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:09.888Z","lastSeenAt":"2026-04-22T18:32:56.532Z"}],"details":{"listingId":"6eb63029-4bb3-4855-8ee3-6cce16a773c9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/33 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","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 network","source_url":"https://lowpaymentfee.com/api/v1/ehr/33"},{"claim":"Platform pricing is $0.02 per request with 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/33"},{"claim":"The /api/v1/ehr/33 path is not listed among the provider's documented API categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving electronic health record data for record ID 33","Integrating EHR data into health-tech applications via pay-per-request model","Agent-driven health data retrieval without pre-registration or API keys"],"bestFor":["Developers needing on-demand EHR data without subscription commitments","AI agents that can settle micropayments in USDC on Base","Prototyping health data integrations with minimal setup"],"notFor":["Production healthcare systems requiring HIPAA-compliant, audited data pipelines","Use cases needing bulk or batch EHR retrieval at scale (no documented batch endpoint)","Users without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:22.936Z"},"updatedAt":"2026-04-22T18:32:56.532Z"}}