{"id":"3503494e-b2f0-483e-9c2e-b0e386efbc2a","shortId":"TMLAzJ","kind":"x402","title":"x402-gated EHR endpoint on Base, pay-per-request with USDC — no API keys required.","tagline":"x402-gated EHR endpoint on Base, pay-per-request with USDC — no API keys required.","description":"This endpoint at `/api/v1/ehr/28` is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-call APIs spanning data analytics, AI/ML inference, finance, and utility services. The specific `/ehr/28` path suggests an Electronic Health Record (EHR) resource, though the provider's landing page does not list this particular endpoint among its documented APIs. The endpoint is live and returns a valid x402 challenge on POST requests.\n\nPayment is settled on the Base network using USDC (contract `0x8335...2913`). The `maxAmountRequired` is 20,000 base units, which at 6 decimals equals $0.02 per request — consistent with the platform's uniform $0.02/request pricing advertised on its homepage. The x402 scheme is \"exact\", meaning the caller pays the precise amount per call. No API keys, rate limits, or subscriptions are required; access is granted immediately upon valid payment.\n\nDocumentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what data the `/ehr/28` endpoint actually returns. The endpoint's purpose, input parameters, and output format must be discovered experimentally. Given the \"EHR\" path segment, this may involve sensitive health data, which warrants caution regarding regulatory compliance (HIPAA, GDPR, etc.).","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","ehr-data"],"categories":["health","data"],"synonyms":["electronic health record","EHR API","health data endpoint","medical records API","x402 health API","lowpaymentfee EHR","pay-per-call health data"],"warnings":["The /api/v1/ehr/28 endpoint is not listed among the provider's documented APIs on the homepage — its purpose and data content are unknown.","EHR (Electronic Health Record) data is typically subject to HIPAA, GDPR, and other health data regulations. No compliance or privacy information is provided.","All documentation pages (docs, API, pricing, README) returned only a 'Connect wallet' prompt with no substantive content.","No request/response schema or examples are available; input parameters and output format are entirely unknown."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/28","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/28","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 what /api/v1/ehr/28 actually does, what inputs it accepts, or what it returns. No OpenAPI schema, no examples, and the endpoint isn't even listed on the provider's own homepage. The EHR path raises regulatory concerns with no compliance information 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'/ehr/28':69,215 '/request':141 '0.02':131,140 '000':123 '0x8335':117 '20':122 '2913':118 '6':128 'EHR API' 'access':170 'actual':217 'advertis':143 'ai/ml':61 'among':90 'amount':158 'analyt':60 'api':15,32,57,93,162,184 'base':7,24,112,124 'base-network' 'call':56,160 'caller':154 'caution':245 'challeng':103 'collect':48 'complianc':248 'connect':193 'consist':134 'content':199 'contract':116 'crawl':182 'data':59,213,242 'decim':129 'descript':210 'discov':230 'doc':183 'document':92,177 'ehr':4,21,76,234 'ehr-data' 'electron':73 'electronic health record' 'endpoint':5,22,36,89,95,216,220 'equal':130 'etc':251 'exact':151 'exampl':207 'experiment':231 'extrem':179 'financ':63 'format':227 'gate':3,20 'gdpr':250 'given':232 'grant':172 'health':74,241 'health data endpoint' 'hipaa':249 'homepag':146 'immedi':173 'infer':62 'input':223 'involv':239 'key':16,33,163 'land':82 'limit':165 'list':86 'live':97 'lowpaymentfee EHR' 'lowpaymentfee.com':43 'maxamountrequir':120 'may':238 'mean':152 'medical records API' 'must':228 'network':113 'no-api-key' 'offer':46 'openapi':203 'output':226 'page':83,188 'paramet':224 'part':40 'particular':88 'path':70,235 'pay':9,26,54,155 'pay-per-cal':53 'pay-per-call health data' 'pay-per-request':8,25 'payment':107,176 'per':10,27,55,132,159 'platform':44,137 'post':105 'precis':157 'price':142,185 'prompt':195 'protocol':52 'provid':80 'purpos':222 'rate':164 'readm':187 'record':75 'regard':246 'regulatori':247 'request':11,28,106,133 'request/response':206 'requir':17,34,169 'resourc':77 'return':99,190,218 'schema':204 'scheme':149 'segment':236 'sensit':240 'servic':66 'settl':109 'span':58 'spars':180 'specif':68 'subscript':167 'substant':198 'suggest':71 'though':78 'uniform':139 'unit':125 'upon':174 'usdc':13,30,115 'usdc-settlement' 'use':114 'util':65 'valid':101,175 'wallet':194 'warrant':244 'x402':2,19,51,102,148 'x402 health API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':50","prices":[{"id":"a3808322-c99a-4826-9ab2-ea1df3b82b59","listingId":"3503494e-b2f0-483e-9c2e-b0e386efbc2a","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/28","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:09.990Z"}],"sources":[{"listingId":"3503494e-b2f0-483e-9c2e-b0e386efbc2a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/28","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:09.990Z","lastSeenAt":"2026-04-22T16:32:32.878Z"}],"details":{"listingId":"3503494e-b2f0-483e-9c2e-b0e386efbc2a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/28 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","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 on Base network using USDC","source_url":"https://lowpaymentfee.com/api/v1/ehr/28"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ehr/28"}],"useCases":["Retrieving electronic health record data on a per-request basis","Integrating EHR data into agent workflows without managing API keys","Programmatic access to health records with crypto micropayments"],"bestFor":["Developers needing on-demand EHR data access without subscriptions","AI agents that can settle x402 payments on Base","Prototyping health data integrations with minimal setup"],"notFor":["Production healthcare applications requiring HIPAA-compliant audit trails and BAAs","Users who need detailed API documentation and guaranteed SLAs","Non-crypto users without Base network USDC wallets"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:22.753Z"},"updatedAt":"2026-04-22T16:32:32.878Z"}}