{"id":"ee8ca54e-da87-4ff4-95ca-746d23a538ee","shortId":"XA39JR","kind":"x402","title":"x402-gated EHR endpoint on Base, pay $0.02 per request in USDC with no API keys.","tagline":"x402-gated EHR endpoint on Base, pay $0.02 per request in USDC with no API keys.","description":"This endpoint at `/api/v1/ehr/52` is part of the lowpaymentfee.com platform, which offers a broad catalog of x402-protocol pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. The specific resource at path `/ehr/52` is listed under the generic title \"Premium API Access\" with no further documentation about what EHR data it returns. The \"ehr\" path segment suggests Electronic Health Records, but no schema, sample response, or field-level documentation is available.\n\nThe endpoint is live and returns a valid x402 challenge on POST. Payment is settled on the Base network using USDC (contract `0x8335…2913`, 6 decimals). The `maxAmountRequired` of 20000 base units equals $0.02 per request. No API keys, rate limits, or subscription commitments are required — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof.\n\nBecause the crawled documentation pages (`/docs`, `/api`, `/pricing`, `/README`) all returned only a \"Connect wallet\" stub with no substantive content, there is effectively zero documentation for this specific endpoint. The input schema, expected POST body, and response format are entirely unknown. Prospective callers should treat this as an exploratory or experimental endpoint until the provider publishes proper documentation.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-settlement","base-network","ehr-data","no-api-key","post-endpoint"],"categories":["health","data"],"synonyms":["electronic health records","EHR API","health data API","medical records endpoint","x402 health API","lowpaymentfee EHR"],"warnings":["No documentation available — /docs, /api, /pricing, and /README all return empty 'Connect wallet' pages","The 'ehr' path suggests Electronic Health Records, which is a regulated data category (HIPAA, GDPR); no compliance information is provided","No input or output schema is documented; callers must experiment to discover the expected POST body and response format","The specific resource ID '52' is opaque with no explanation of what it references"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/52","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/52","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 for this specific resource. No input schema, no response schema, no examples, and the docs pages are all empty stubs. The 'ehr' path is suggestive but unconfirmed. This is effectively a stub 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'/api/v1/ehr/52':38 '/docs':179 '/ehr/52':74 '/pricing':181 '/readme':182 '0.02':9,26,147 '0x8335':136 '20000':143 '2913':137 '6':138 'EHR API' 'access':83 'ai/ml':62 'analyt':61 'api':16,33,58,82,151 'attach':162 'avail':113 'base':7,24,131,144 'base-network' 'bodi':208 'broad':48 'call':57 'caller':160,216 'catalog':49 'challeng':123 'commit':157 'connect':187 'content':193 'contract':135 'crawl':176 'crypto':65 'data':60,91 'decim':139 'document':87,111,177,198,231 'effect':196 'ehr':4,21,90,95 'ehr-data' 'electron':99 'electronic health records' 'endpoint':5,22,36,115,202,225 'entir':213 'equal':146 'expect':206 'experiment':224 'exploratori':222 'field':109 'field-level':108 'financ':64 'format':211 'gate':3,20 'generic':79 'header':167 'health':100 'health data API' 'infer':63 'input':204 'key':17,34,152 'level':110 'limit':154 'list':76 'live':117 'lowpaymentfee EHR' 'lowpaymentfee.com':43 'maxamountrequir':141 'medical records endpoint' 'network':132 'no-api-key' 'offer':46 'page':178 'part':40 'path':73,96 'pay':8,25,55 'pay-per-cal':54 'pay-per-request' 'payment':126,166,172 'per':10,27,56,148 'platform':44 'post':125,207 'post-endpoint' 'premium':81 'proof':173 'proper':230 'prospect':215 'protocol':53 'provid':228 'publish':229 'rate':153 'record':101 'request':11,28,149 'requir':159 'resourc':71 'respons':106,210 'return':93,119,184 'sampl':105 'schema':104,205 'segment':97 'servic':68 'settl':128 'simpli':161 'span':59 'specif':70,201 'stub':189 'subscript':156 'substant':192 'suggest':98 'titl':80 'treat':218 'unit':145 'unknown':214 'usdc':13,30,134 'usdc-settlement' 'use':133 'util':67 'valid':121,170 'wallet':188 'x':165 'x-payment':164 'x402':2,19,52,122,171 'x402 health API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':51 'zero':197","prices":[{"id":"71499a86-42b3-46b6-96d0-4ad922a352ca","listingId":"ee8ca54e-da87-4ff4-95ca-746d23a538ee","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/52","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:09.928Z"}],"sources":[{"listingId":"ee8ca54e-da87-4ff4-95ca-746d23a538ee","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/52","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:09.928Z","lastSeenAt":"2026-04-22T18:04:46.618Z"}],"details":{"listingId":"ee8ca54e-da87-4ff4-95ca-746d23a538ee","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/52 \\\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 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ehr/52"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ehr/52"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving electronic health record data for a specific resource (ID 52)","Programmatic access to health data without API key management","Agent-driven pay-per-call health data retrieval on Base"],"bestFor":["Developers exploring x402-gated health data endpoints","Agents that need keyless, per-call access to EHR-style data","Prototyping pay-per-request health data integrations"],"notFor":["Production healthcare applications requiring documented, HIPAA-compliant APIs","Use cases needing bulk or batch EHR data retrieval at scale","Anyone who needs clear response schemas before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:22.865Z"},"updatedAt":"2026-04-22T18:04:46.618Z"}}