{"id":"250d41e0-4a4d-4874-82a2-90637e6b3802","shortId":"Hhfzfw","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/13` is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance, and utility services. The specific `/ehr/13` 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. The endpoint is live and returns a valid x402 challenge on POST.\n\nPayment is settled on the Base network using USDC (contract `0x8335…2913`) via the \"exact\" scheme. The `maxAmountRequired` is 20,000 base units, which at 6 decimals equals $0.02 per request — consistent with the provider's uniform $0.02/request pricing across all listed endpoints. No API keys are required; access is granted by attaching a valid `X-PAYMENT` header with a signed payment proof. The challenge specifies a 300-second timeout window.\n\nBecause the crawled documentation pages (`/docs`, `/api`, `/pricing`, `/README`) all returned only a \"Connect wallet\" stub with no substantive content, there is no schema documentation, example request/response, or detailed description of what the `/ehr/13` endpoint actually returns. The endpoint's purpose and data format must be inferred from its path alone, which is a significant limitation.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-settlement","base-network","ehr-data","no-api-key","post-method"],"categories":["health","data"],"synonyms":["electronic health record","EHR API","health data endpoint","medical record API","x402 health API","lowpaymentfee EHR"],"warnings":["The /ehr/13 path is not listed among the provider's documented APIs on the landing page — its availability and purpose are uncertain.","No request or response schema documentation exists; all doc pages return only 'Connect wallet' stubs.","EHR data may be subject to healthcare regulations (HIPAA, GDPR health data provisions) — no compliance or data-handling documentation is provided.","The nature of the data behind this endpoint is entirely unknown; 'EHR' in the path is the only clue."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/13","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/13","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 with clear pricing, but there is zero documentation on what the /ehr/13 endpoint accepts or returns. All doc pages are stubs. The endpoint is not even listed on the provider's own landing page, and the health/EHR domain raises regulatory concerns without any compliance 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'/api/v1/ehr/13':38 '/docs':185 '/ehr/13':69,213 '/pricing':187 '/readme':188 '/request':145 '0.02':9,26,135,144 '000':127 '0x8335':117 '20':126 '2913':118 '300':176 '6':132 'EHR API' 'access':156 'across':147 'actual':215 'ai/ml':61 'alon':230 'among':90 'analyt':60 'api':16,33,57,93,152 'attach':160 'base':7,24,112,128 'base-network' 'categori':94 'challeng':104,173 'collect':48 'connect':193 'consist':138 'content':199 'contract':116 'crawl':182 'data':59,222 'decim':133 'descript':209 'detail':208 'document':92,183,204 'ehr':4,21,76 'ehr-data' 'electron':73 'electronic health record' 'endpoint':5,22,36,89,96,150,214,218 'equal':134 'exact':121 'exampl':205 'financ':63 'format':223 'gate':3,20 'grant':158 'header':166 'health':74 'health data endpoint' 'infer':62,226 'key':17,34,153 'land':82 'limit':235 'list':86,149 'live':98 'lowpaymentfee EHR' 'lowpaymentfee.com':43 'maxamountrequir':124 'medical record API' 'must':224 'network':113 'no-api-key' 'offer':46 'page':83,184 'part':40 'particular':88 'path':70,229 'pay':8,25,54 'pay-per-request':53 'payment':107,165,170 'per':10,27,55,136 'platform':44 'post':106 'post-method' 'price':146 'proof':171 'protocol':52 'provid':80,141 'purpos':220 'record':75 'request':11,28,56,137 'request/response':206 'requir':155 'resourc':77 'return':100,190,216 'schema':203 'scheme':122 'second':177 'servic':66 'settl':109 'sign':169 'signific':234 'span':58 'specif':68 'specifi':174 'stub':195 'substant':198 'suggest':71 'though':78 'timeout':178 'uniform':143 'unit':129 'usdc':13,30,115 'usdc-settlement' 'use':114 'util':65 'valid':102,162 'via':119 'wallet':194 'window':179 'x':164 'x-payment':163 'x402':2,19,51,103 'x402 health API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':50","prices":[{"id":"73ddbb29-3fad-4d58-8bf8-c08db39698f7","listingId":"250d41e0-4a4d-4874-82a2-90637e6b3802","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/13","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-19T12:29:49.935Z"}],"sources":[{"listingId":"250d41e0-4a4d-4874-82a2-90637e6b3802","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/13","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T12:29:49.935Z","lastSeenAt":"2026-04-22T20:01:53.130Z"}],"details":{"listingId":"250d41e0-4a4d-4874-82a2-90637e6b3802","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/13 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-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 network","source_url":"https://lowpaymentfee.com/api/v1/ehr/13"},{"claim":"The provider advertises uniform $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/ehr/13"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) return only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving electronic health record data for a specific resource (ID 13)","Agent-driven healthcare data access with per-call micropayments","Integrating EHR data into workflows without managing API keys or subscriptions"],"bestFor":["Developers needing on-demand EHR data access without subscription commitments","AI agents that can autonomously pay for health data per request","Prototyping healthcare integrations with minimal setup"],"notFor":["Production healthcare systems requiring HIPAA-compliant audit trails and BAAs (no compliance documentation available)","Bulk retrieval of large EHR datasets (pay-per-request model at $0.02/call adds up)","Users who need detailed API documentation before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:23.37Z"},"updatedAt":"2026-04-22T20:01:53.130Z"}}