{"id":"9132be71-6317-4fec-bc64-aed52788e1d2","shortId":"PCJhYT","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/16` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-call APIs settled in USDC on the Base network. The specific resource appears to be an Electronic Health Record (EHR) endpoint, though the provider's landing page does not list it among its publicly advertised API categories (Data & Analytics, AI & ML, Finance & Web3, Infrastructure). The endpoint is live and returns a valid x402 challenge with a maximum cost of 20,000 base units of USDC (0.02 USD) per request.\n\nThe platform advertises a simple pricing model: $0.02 per request with no API keys, no rate limits, no minimums, and no commitments. Payment is handled via the x402 protocol's `exact` scheme on the Base L2 network, settling to USDC contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`. The endpoint accepts HTTP POST requests and returns `application/json` responses.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/ehr/16` endpoint actually returns or what input it expects. The \"EHR\" path segment suggests electronic health records, but this is unconfirmed and the `16` path parameter's meaning is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","ehr-data","http-post","json-response"],"categories":["health","data"],"synonyms":["electronic health record","EHR API","health data endpoint","medical records API","lowpaymentfee","x402 health API","pay-per-call EHR"],"warnings":["The /api/v1/ehr/16 endpoint is not listed among the provider's publicly advertised APIs — its purpose and data source are unverified.","EHR (Electronic Health Record) data may be subject to healthcare regulations (e.g., HIPAA). No compliance information is provided.","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no usable content.","No request or response schema is available; input format and output structure are completely unknown.","The meaning of the path parameter '16' is undocumented."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/16","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/16","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 the EHR endpoint does, what inputs it expects, or what it returns. The endpoint is not listed on the provider's own landing page. No OpenAPI schema, no examples, and all doc pages are empty. This is effectively a stub 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'0.02':9,26,119,130 '000':114 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':164 '16':234 '20':113 'EHR API' 'accept':167 'actual':213 'addit':195 'advertis':88,125 'ai':93 'among':85 'analyt':92 'api':15,32,55,89,135,181 'appear':66 'application/json':173 'base':7,24,61,115,157 'base-network' 'call':54 'categori':90 'challeng':107 'collect':46 'commit':144 'connect':190 'content':196 'contract':163 'cost':111 'data':91 'descript':207 'doc':180 'document':175 'ehr':4,21,73,221 'ehr-data' 'electron':70,225 'electronic health record' 'endpoint':5,22,36,74,99,166,212 'exact':153 'exampl':204 'expect':219 'extrem':177 'financ':95 'gate':3,20 'handl':147 'health':71,226 'health data endpoint' 'http':168 'http-post' 'infrastructur':97 'input':217 'json-response' 'key':16,33,136 'l2':158 'land':79 'limit':139 'list':83 'live':101 'lowpaymentfee' 'lowpaymentfee.com':43 'maximum':110 'mean':238 'medical records API' 'minimum':141 'ml':94 'model':129 'network':62,159 'openapi':200 'page':80,185 'paramet':236 'part':40 'path':222,235 'pay':8,25,52 'pay-per-cal':51 'pay-per-call EHR' 'pay-per-request' 'payment':145 'per':10,27,53,121,131 'platform':44,124 'post':169 'price':128,182 'prompt':192 'protocol':50,151 'provid':77 'public':87 'rate':138 'readm':184 'record':72,227 'render':187 'request':11,28,122,132,170 'request/response':203 'requir':17,34 'resourc':65 'respons':174 'return':103,172,214 'schema':201 'scheme':154 'segment':223 'settl':56,160 'simpl':127 'spars':178 'specif':64 'suggest':224 'though':75 'unconfirm':231 'unit':116 'unknown':240 'usd':120 'usdc':13,30,58,118,162 'usdc-settlement' 'valid':105 'via':148 'wallet':191 'web3':96 'x402':2,19,49,106,150 'x402 health API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':48","prices":[{"id":"b7995c20-4ca8-41c2-b827-09f7330caede","listingId":"9132be71-6317-4fec-bc64-aed52788e1d2","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/16","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-19T12:29:50.504Z"}],"sources":[{"listingId":"9132be71-6317-4fec-bc64-aed52788e1d2","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/16","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T12:29:50.504Z","lastSeenAt":"2026-04-22T20:01:53.134Z"}],"details":{"listingId":"9132be71-6317-4fec-bc64-aed52788e1d2","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/16 \\\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 of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ehr/16"},{"claim":"The platform advertises $0.02 per request with no API keys, no rate limits, and no minimums","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ehr/16"},{"claim":"Documentation pages render only 'Connect wallet' with no additional content","source_url":"https://lowpaymentfee.com/docs"},{"claim":"The /api/v1/ehr/16 endpoint is not listed among the provider's publicly advertised API categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving electronic health record data via a single paid API call","Integrating EHR data into agent workflows without managing API keys","Programmatic access to health record information settled on-chain"],"bestFor":["Developers needing keyless, pay-per-call access to EHR data","AI agents with Base USDC wallets that need health data","Prototyping integrations that require on-demand health record lookups"],"notFor":["Production healthcare applications requiring documented, HIPAA-compliant APIs","Users who need detailed schema documentation or guaranteed SLAs","Bulk retrieval of large health record datasets"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:23.338Z"},"updatedAt":"2026-04-22T20:01:53.134Z"}}