{"id":"5ded318f-539b-423e-88ea-b74526c2aee8","shortId":"9cUp4m","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/92` 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 at path `/ehr/92` is labeled \"Premium API Access\" but its exact data payload is undocumented — the \"ehr\" path segment suggests Electronic Health Record data, though no schema or sample response is provided.\n\nThe platform advertises a flat $0.02 per request across all its endpoints, with no API keys, no rate limits, and instant access. The x402 challenge confirms the endpoint is live, accepting POST requests and requiring an X-PAYMENT header with an \"exact\" scheme payment of up to 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base). Since USDC uses 6 decimals, 20,000 base units equals $0.02, consistent with the site's advertised pricing. Payments are sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a maximum timeout of 300 seconds.\n\nThe broader lowpaymentfee.com platform offers endpoints across data/analytics, AI/ML (sentiment, summarization, classification, embeddings), finance/Web3 (price feeds, exchange rates, gas estimates), and infrastructure utilities (geocoding, validation, conversion). However, the `/api/v1/ehr/92` path does not appear in the site's public API listing, and no documentation, input schema, or output schema is available for this specific endpoint. The crawled docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","ehr-data"],"categories":["data","health"],"synonyms":["electronic health record API","EHR endpoint","health data API","x402 health API","pay-per-call EHR","USDC API","Base network API","lowpaymentfee"],"warnings":["The /api/v1/ehr/92 endpoint is not listed on the provider's public API catalog — its purpose and data content are unverified.","No input schema, output schema, or example responses are available for this endpoint.","The 'ehr' path suggests health/medical data which may be subject to HIPAA or other regulatory requirements — no compliance documentation is provided.","Documentation pages (/docs, /api, /pricing, /README) returned no substantive content beyond a wallet connect prompt."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/92","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/92","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 confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no input/output schema, no example responses, and the /ehr/92 path is not listed on the provider's own site. The \"EHR\" label is unverified and the actual data returned is 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'/ehr/92':68 '0.02':9,26,103,165 '000':147,161 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':178 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':152 '20':146,160 '300':184 '6':158 'Base network API' 'EHR endpoint' 'USDC API' 'accept':128 'access':73,119 'across':106,192 'address':177 'advertis':100,171 'ai/ml':194 'api':15,32,55,72,112,224,243 'appear':218 'avail':235 'base':7,24,61,148,154,162 'base-network' 'broader':187 'call':54 'challeng':122 'classif':197 'collect':46 'confirm':123 'connect':252 'consist':166 'content':258 'convers':211 'crawl':241 'data':77,89 'data/analytics':193 'decim':159 'doc':242 'document':228 'ehr':4,21,82 'ehr-data' 'electron':86 'electronic health record API' 'embed':198 'endpoint':5,22,36,109,125,191,239 'equal':164 'estim':205 'exact':76,140 'exchang':202 'feed':201 'finance/web3':199 'flat':102 'gas':204 'gate':3,20 'geocod':209 'header':137 'health':87 'health data API' 'howev':212 'infrastructur':207 'input':229 'instant':118 'key':16,33,113 'label':70 'limit':116 'list':225 'live':127 'lowpaymentfee' 'lowpaymentfee.com':43,188 'maximum':181 'network':62 'no-api-key' 'offer':190 'output':232 'page':247 'part':40 'path':67,83,215 'pay':8,25,52 'pay-per-cal':51 'pay-per-call EHR' 'pay-per-request' 'payload':78 'payment':136,142,173 'per':10,27,53,104 'platform':44,99,189 'post':129 'premium':71 'price':172,200,244 'prompt':254 'protocol':50 'provid':97 'public':223 'rate':115,203 'readm':246 'record':88 'request':11,28,105,130 'requir':17,34,132 'resourc':65 'respons':95 'return':249 'sampl':94 'schema':92,230,233 'scheme':141 'second':185 'segment':84 'sent':175 'sentiment':195 'settl':56 'sinc':155 'site':169,221 'specif':64,238 'substant':257 'suggest':85 'summar':196 'though':90 'timeout':182 'undocu':80 'unit':149,163 'usdc':13,30,58,151,156 'usdc-settlement' 'use':157 'util':208 'valid':210 'wallet':253 'x':135 'x-payment':134 'x402':2,19,49,121 'x402 health API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':48","prices":[{"id":"f63e5d81-c48c-4103-93e5-d15c141e5845","listingId":"5ded318f-539b-423e-88ea-b74526c2aee8","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/92","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:10.280Z"}],"sources":[{"listingId":"5ded318f-539b-423e-88ea-b74526c2aee8","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/92","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:10.280Z","lastSeenAt":"2026-04-22T15:02:40.951Z"}],"details":{"listingId":"5ded318f-539b-423e-88ea-b74526c2aee8","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/92 \\\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 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ehr/92"},{"claim":"The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ehr/92"},{"claim":"The /api/v1/ehr/92 path is not listed among the platform's publicly advertised API endpoints","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving electronic health record data on a per-request payment basis","Integrating health data into agent workflows without managing API keys","Paying for individual data lookups using USDC on Base"],"bestFor":["Agents needing on-demand health data access without subscription commitments","Developers experimenting with x402 pay-per-call patterns","Low-volume or sporadic EHR data retrieval"],"notFor":["Production healthcare applications requiring documented schemas and compliance guarantees","High-volume bulk EHR data extraction (no documented batch endpoints)","Users who need detailed API documentation or guaranteed SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:22.404Z"},"updatedAt":"2026-04-22T15:02:40.951Z"}}