{"id":"53fc1fb5-30fd-43ce-a69b-b946a4cfb106","shortId":"Fjvhpg","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/41` 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 `/ehr/41` path suggests an Electronic Health Record (EHR) resource, though the provider's landing page does not explicitly list or document this particular endpoint. The endpoint is live and returns a valid x402 challenge.\n\nPayment is settled on the Base network using USDC (contract `0x8335…2913`) via the x402 \"exact\" scheme. The `maxAmountRequired` is 20,000 base units, which at 6 decimals equals $0.02 per request — consistent with the uniform $0.02/request pricing advertised across all endpoints on the site. No API keys, rate limits, or upfront commitments are required; callers simply attach an `X-PAYMENT` header with a valid x402 payment proof.\n\nDocumentation is extremely sparse. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema, and no description of what data the `/ehr/41` endpoint actually returns. The endpoint accepts POST requests and returns `application/json`, but the exact input parameters and output fields are unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","ehr-data","json-response","post-method"],"categories":["health","data"],"synonyms":["electronic health record","EHR API","medical records API","health data endpoint","x402 EHR","pay-per-call health API"],"warnings":["The /ehr/41 endpoint is not listed on the provider's own landing page — its purpose and data content are unknown.","No documentation exists: docs, pricing, API, and README pages all show only 'Connect wallet'.","No request or response schema is available; input parameters are completely unknown.","EHR data may be subject to healthcare regulations (e.g., HIPAA); the provider gives no compliance information.","The provider offers dozens of endpoints at a uniform $0.02 price with no visible documentation — exercise caution regarding data quality and legitimacy."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/41","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/41","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/41 actually does, what inputs it expects, or what it returns. No OpenAPI spec, no examples, no request/response schemas. The EHR path is not even listed on the provider's own landing page. This is effectively a stub 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'/ehr/41':71,213 '/request':142 '0.02':9,26,134,141 '000':126 '0x8335':115 '20':125 '2913':116 '6':131 'EHR API' 'accept':219 'across':145 'actual':215 'advertis':144 'ai/ml':62 'analyt':61 'api':15,32,58,152,182 'application/json':224 'attach':163 'base':7,24,110,127 'base-network' 'broad':48 'call':57 'caller':161 'catalog':49 'challeng':104 'commit':158 'connect':190 'consist':137 'contract':114 'crypto':65 'data':60,211 'decim':132 'descript':208 'detail':197 'doc':180 'document':91,175 'ehr':4,21,78 'ehr-data' 'electron':75 'electronic health record' 'endpoint':5,22,36,94,96,147,214,218 'equal':133 'exact':120,227 'explicit':88 'extrem':177 'field':232 'financ':64 'gate':3,20 'header':168 'health':76 'health data endpoint' 'infer':63 'input':228 'json-response' 'key':16,33,153 'land':84 'limit':155 'list':89 'live':98 'lowpaymentfee.com':43 'maxamountrequir':123 'medical records API' 'network':111 'no-api-key' 'offer':46 'openapi':201 'output':231 'page':85,185 'paramet':229 'part':40 'particular':93 'path':72 'pay':8,25,55 'pay-per-cal':54 'pay-per-call health API' 'pay-per-request' 'payment':105,167,173 'per':10,27,56,135 'platform':44 'post':220 'post-method' 'price':143,181 'prompt':192 'proof':174 'protocol':53 'provid':82 'rate':154 'readm':184 'record':77 'render':187 'request':11,28,136,221 'request/response':204 'requir':17,34,160 'resourc':79 'return':100,216,223 'schema':205 'scheme':121 'servic':68 'settl':107 'simpli':162 'site':150 'span':59 'spars':178 'spec':202 'specif':70 'suggest':73 'technic':196 'though':80 'uniform':140 'unit':128 'unknown':234 'upfront':157 'usdc':13,30,113 'usdc-settlement' 'use':112 'util':67 'valid':102,171 'via':117 'wallet':191 'x':166 'x-payment':165 'x402':2,19,52,103,119,172 'x402 EHR' 'x402-gated':1,18 'x402-payment' 'x402-protocol':51","prices":[{"id":"fca39668-730c-4e29-b27a-1a28a5e35b4d","listingId":"53fc1fb5-30fd-43ce-a69b-b946a4cfb106","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/41","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:10.034Z"}],"sources":[{"listingId":"53fc1fb5-30fd-43ce-a69b-b946a4cfb106","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/41","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:10.034Z","lastSeenAt":"2026-04-22T16:32:32.928Z"}],"details":{"listingId":"53fc1fb5-30fd-43ce-a69b-b946a4cfb106","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/41 \\\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","source_url":"https://lowpaymentfee.com/api/v1/ehr/41"},{"claim":"Uniform pricing of $0.02 per request across all endpoints, no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/ehr/41"},{"claim":"Docs, pricing, API, and README pages render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving electronic health record data on a per-request payment basis","Integrating EHR data into agent workflows without managing API keys","Accessing health data via crypto micropayments on Base"],"bestFor":["Developers who want keyless, pay-per-call access to health data","AI agents that can settle x402 payments autonomously on Base","Prototyping integrations that need EHR data without subscription commitments"],"notFor":["Production healthcare systems requiring HIPAA-compliant, documented APIs with SLAs","Users who need detailed schema documentation before integrating","Anyone unable to pay with USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:22.729Z"},"updatedAt":"2026-04-22T16:32:32.928Z"}}