{"id":"2d71dafe-6490-4d27-a681-82e6d5409527","shortId":"zsqasj","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/93` 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/93` is labeled \"Premium API Access\" but its exact functionality is unclear — the \"ehr\" path segment suggests Electronic Health Records, though no documentation confirms what data or service this particular endpoint returns.\n\nThe endpoint is live and responds with a valid x402 challenge (HTTP 402) on POST. Payment is settled on the Base network using USDC (contract `0x8335…2913`) with a maximum amount of 20,000 base units, which equals $0.02 USD (USDC uses 6 decimals). This matches the site-wide advertised pricing of $0.02 per request. The platform advertises no API keys, no rate limits, and instant access — 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 substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/ehr/93` endpoint actually returns. The `outputSchema` in the challenge only confirms it accepts HTTP POST. Without further documentation, callers must experiment to discover the expected request body and response format.","tags":[],"capabilities":["x402-payment","per-call-billing","usdc-settlement","base-network","http-post","no-api-key","ehr-data"],"categories":["data","health"],"synonyms":["electronic health records API","EHR endpoint","pay-per-call API","x402 API","USDC micropayment API","lowpaymentfee","health data API","Base network API"],"warnings":["The 'ehr' path segment suggests Electronic Health Records but no documentation confirms this — the actual data returned is unknown.","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no content.","No OpenAPI schema, no request body specification, and no response examples are available.","If this endpoint does serve health data, it may be subject to HIPAA or other health-data regulations — no compliance information is provided.","The endpoint path includes a hardcoded ID (93); it is unclear whether other IDs are valid or what they represent."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/93","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/93","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 with clear pricing, but there is zero documentation on what the /ehr/93 endpoint actually does, no request/response schema, and no examples. The docs pages are empty. The 'ehr' path is unexplained, making this effectively a stub 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'/ehr/93':74 '0.02':9,26,144,159 '000':139 '0x8335':131 '20':138 '2913':132 '402':118 '6':148 'Base network API' 'EHR endpoint' 'USDC micropayment API' 'accept':236 'access':79,173 'actual':226 'advertis':156,164 'ai/ml':62 'amount':136 'analyt':61 'api':15,32,58,78,166,195 'attach':176 'base':7,24,126,140 'base-network' 'bodi':250 'broad':48 'call':57 'caller':174,242 'catalog':49 'challeng':116,232 'confirm':97,234 'connect':203 'content':209 'contract':130 'crypto':65 'data':60,99 'decim':149 'descript':220 'discov':246 'doc':193 'document':96,188,241 'ehr':4,21,87 'ehr-data' 'electron':91 'electronic health records API' 'endpoint':5,22,36,104,107,225 'equal':143 'exact':82 'exampl':217 'expect':248 'experi':244 'extrem':190 'financ':64 'format':253 'function':83 'gate':3,20 'header':181 'health':92 'health data API' 'http':117,237 'http-post' 'infer':63 'instant':172 'key':16,33,167 'label':76 'limit':170 'live':109 'lowpaymentfee' 'lowpaymentfee.com':43 'match':151 'maximum':135 'must':243 'network':127 'no-api-key' 'offer':46 'openapi':213 'outputschema':229 'page':198 'part':40 'particular':103 'path':73,88 'pay':8,25,55 'pay-per-cal':54 'pay-per-call API' 'payment':121,180,186 'per':10,27,56,160 'per-call-billing' 'platform':44,163 'post':120,238 'premium':77 'price':157,194 'prompt':205 'proof':187 'protocol':53 'rate':169 'readm':197 'record':93 'render':200 'request':11,28,161,249 'request/response':216 'requir':17,34 'resourc':71 'respond':111 'respons':252 'return':105,227 'schema':214 'segment':89 'servic':68,101 'settl':123 'simpli':175 'site':154 'site-wid':153 'span':59 'spars':191 'specif':70 'substant':208 'suggest':90 'though':94 'unclear':85 'unit':141 'usd':145 'usdc':13,30,129,146 'usdc-settlement' 'use':128,147 'util':67 'valid':114,184 'wallet':204 'wide':155 'without':239 'x':179 'x-payment':178 'x402':2,19,52,115,185 'x402 API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':51","prices":[{"id":"ca77439b-d00b-4662-917a-81f66aedca21","listingId":"2d71dafe-6490-4d27-a681-82e6d5409527","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/93","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:10.521Z"}],"sources":[{"listingId":"2d71dafe-6490-4d27-a681-82e6d5409527","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/93","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:10.521Z","lastSeenAt":"2026-04-22T15:02:41.351Z"}],"details":{"listingId":"2d71dafe-6490-4d27-a681-82e6d5409527","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/93 \\\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 HTTP 402 with a valid x402 challenge on POST, confirming it is live.","source_url":"https://lowpaymentfee.com/api/v1/ehr/93"},{"claim":"Payment is 20,000 base units of USDC (USD Coin) on the Base network, equaling $0.02.","source_url":"https://lowpaymentfee.com/api/v1/ehr/93"},{"claim":"The platform advertises $0.02 per request, no API keys, no rate limits, and instant access.","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no substantive content.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing health record data (EHR) on a per-request payment basis without needing an API key","Integrating pay-per-call data endpoints into agent workflows using x402 protocol","Programmatic retrieval of record ID 93 from the EHR dataset"],"bestFor":["Developers experimenting with x402 pay-per-call protocols","Agents that need keyless, on-demand API access settled in USDC on Base","Low-volume or exploratory access to EHR-style data without subscription commitments"],"notFor":["Production healthcare applications requiring HIPAA-compliant, well-documented EHR APIs","High-volume bulk data retrieval where per-call pricing is inefficient","Users who need detailed API documentation and response schemas before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:22.124Z"},"updatedAt":"2026-04-22T15:02:41.351Z"}}