{"id":"d45cb9eb-fa26-4c59-8d34-a36c2bf821c8","shortId":"5gsFL3","kind":"x402","title":"x402-gated EHR endpoint on Base, pay $0.02 per request in USDC — no API keys needed.","tagline":"x402-gated EHR endpoint on Base, pay $0.02 per request in USDC — no API keys needed.","description":"This endpoint at `/api/v1/ehr/63` 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/63` path suggests an Electronic Health Record (EHR) resource, though the provider's landing page does not explicitly list or document this particular endpoint. The platform's generic description labels it simply \"Premium API Access.\"\n\nPayment is handled via the x402 protocol on the Base network. The 402 challenge specifies a maximum amount of 20,000 base units of USDC (contract `0x8335…2913`, 6 decimals), which equals $0.02 per request. The endpoint accepts HTTP POST, returns `application/json`, and requires no API keys or account registration — payment is the only authentication. The provider advertises no rate limits and instant access.\n\nDocumentation is extremely sparse. The `/docs`, `/api`, `/pricing`, and `/README` pages all render 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/63` endpoint actually returns or what POST body it expects. The EHR path is not mentioned anywhere on the landing page's API catalog, raising questions about whether this is a production endpoint or a placeholder. Users should exercise caution, especially given the health-data connotation of \"EHR\" and the complete absence of documentation for this specific route.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-base","no-api-key","json-response","http-post"],"categories":["health","data"],"synonyms":["electronic health record API","EHR API","health data endpoint","x402 EHR","pay-per-call health API","lowpaymentfee EHR"],"warnings":["The /ehr/63 path is not listed in the provider's own API catalog — it may be a placeholder or undocumented endpoint.","No request body schema or response schema is available; callers have no way to know what to send or what to expect.","'EHR' implies health data — there is no indication of HIPAA compliance, data provenance, or regulatory standing.","All documentation pages (/docs, /pricing, /README) returned only a 'Connect wallet' prompt with no content."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/63","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/63","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is zero documentation for this specific /ehr/63 route — no schema, no examples, no description of what it returns. The EHR path is absent from the provider's own API catalog, and all doc pages render only 'Connect wallet'. This is effectively a stub 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'/api/v1/ehr/63':38 '/docs':175 '/ehr/63':71,207 '/pricing':177 '/readme':179 '0.02':9,26,138 '000':126 '0x8335':132 '20':125 '2913':133 '402':118 '6':134 'EHR API' 'absenc':259 'accept':143 'access':105,169 'account':154 'actual':209 'advertis':163 'ai/ml':62 'amount':123 'analyt':61 'anywher':223 'api':15,32,58,104,151,229 'application/json':147 'authent':160 'base':7,24,115,127 'bodi':214 'broad':48 'call':57 'catalog':49,230 'caution':246 'challeng':119 'complet':258 'connect':185 'connot':253 'content':191 'contract':131 'crypto':65 'data':60,205,252 'decim':135 'descript':99,202 'document':91,170,261 'ehr':4,21,78,218,255 'electron':75 'electronic health record API' 'endpoint':5,22,36,94,142,208,239 'equal':137 'especi':247 'exampl':199 'exercis':245 'expect':216 'explicit':88 'extrem':172 'financ':64 'gate':3,20 'generic':98 'given':248 'handl':108 'health':76,251 'health data endpoint' 'health-data':250 'http':144 'http-post' 'infer':63 'instant':168 'json-response' 'key':16,33,152 'label':100 'land':84,226 'limit':166 'list':89 'lowpaymentfee EHR' 'lowpaymentfee.com':43 'maximum':122 'mention':222 'need':17,34 'network':116 'no-api-key' 'offer':46 'openapi':195 'page':85,180,227 'part':40 'particular':93 'path':72,219 'pay':8,25,55 'pay-per-cal':54 'pay-per-call health API' 'payment':106,156 'per':10,27,56,139 'per-request-billing' 'placehold':242 'platform':44,96 'post':145,213 'premium':103 'product':238 'prompt':187 'protocol':53,112 'provid':82,162 'question':232 'rais':231 'rate':165 'record':77 'registr':155 'render':182 'request':11,28,140 'request/response':198 'requir':149 'resourc':79 'return':146,210 'rout':265 'schema':196 'servic':68 'simpli':102 'span':59 'spars':173 'specif':70,264 'specifi':120 'substant':190 'suggest':73 'though':80 'unit':128 'usdc':13,30,130 'usdc-base' 'user':243 'util':67 'via':109 'wallet':186 'whether':234 'x402':2,19,52,111 'x402 EHR' 'x402-gated':1,18 'x402-payment' 'x402-protocol':51","prices":[{"id":"b0cf7249-a80f-4230-a80f-9033d79539c8","listingId":"d45cb9eb-fa26-4c59-8d34-a36c2bf821c8","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/63","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:09.960Z"}],"sources":[{"listingId":"d45cb9eb-fa26-4c59-8d34-a36c2bf821c8","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/63","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:09.960Z","lastSeenAt":"2026-04-22T16:32:32.813Z"}],"details":{"listingId":"d45cb9eb-fa26-4c59-8d34-a36c2bf821c8","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/63 \\\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 x402 challenge specifies maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/ehr/63"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/ehr/63"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The /ehr/63 endpoint is not listed among the provider's available APIs on the landing page","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving EHR record #63 via a single paid POST request","Programmatic access to health-related data without account setup","Agent-driven data retrieval with on-chain micropayment"],"bestFor":["Developers experimenting with x402 pay-per-call protocols","Agents that need keyless, instant API access on Base","Quick one-off data lookups without subscription commitments"],"notFor":["Production healthcare applications requiring HIPAA-compliant, well-documented APIs","Use cases needing detailed request/response schemas or SLAs","Bulk data retrieval where per-request pricing is inefficient"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:22.846Z"},"updatedAt":"2026-04-22T16:32:32.813Z"}}