{"id":"e1570d16-6ca8-47d0-96fe-1bffedac53c9","shortId":"Hnc9vu","kind":"x402","title":"Pay-per-call EHR endpoint on Base via x402 — $0.02/request in USDC","tagline":"Pay-per-call EHR endpoint on Base via x402 — $0.02/request in USDC","description":"This endpoint at `/api/v1/ehr/90` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs settled via the x402 protocol on the Base network using USDC. The specific endpoint appears to serve Electronic Health Record (EHR) data, though the exact schema and data contents are not documented in the available crawl material. The endpoint is live and returns a valid x402 challenge with a max amount of 20,000 base units of USDC (6 decimals), which equals $0.02 per request.\n\nThe broader lowpaymentfee.com platform advertises categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all at the same $0.02/request price point. The platform emphasizes no API keys, no rate limits, instant access, and payment on the Base network. However, the `/api/v1/ehr/90` endpoint is notably absent from the publicly listed API catalog on the homepage, and no documentation, input schema, or example responses are available for it. The \"90\" in the path may refer to a specific record ID or resource identifier, but this is unconfirmed.\n\nBecause there is no OpenAPI spec, no documented request/response schema, and no explanation of what EHR data is returned or what input the POST body expects, this listing carries significant uncertainty. The endpoint is confirmed live via its 402 challenge, but consumers should proceed with caution given the lack of documentation and the sensitive nature of health record data.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","ehr-data","pay-per-request","no-api-key"],"categories":["health","data"],"synonyms":["electronic health record","EHR API","health data API","medical records API","x402 health endpoint","lowpaymentfee EHR"],"warnings":["No documentation or schema available for this endpoint — input and output formats are unknown","Endpoint /api/v1/ehr/90 is not listed on the provider's public API catalog, raising questions about its intended availability","EHR (Electronic Health Record) data is a regulated category — verify HIPAA compliance and data provenance before use","The path segment '90' is unexplained; it may be a fixed record ID, which could mean this returns a single static record"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/90","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/90","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid x402 402 challenge, but there is no documentation, no OpenAPI spec, no input/output schema, and the endpoint is not listed on the provider's public catalog. The nature of the EHR data returned is entirely unknown, and health data raises regulatory 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'/request':12,26,137 '0.02':11,25,112,136 '000':103 '20':102 '402':242 '6':108 '90':186 'EHR API' 'absent':163 'access':150 'advertis':119 'ai':124 'amount':100 'analyt':123 'api':49,144,168 'appear':64 'avail':84,182 'base':8,22,57,104,155 'base-network' 'bodi':228 'broad':42 'broader':116 'call':4,18 'carri':232 'catalog':43,169 'categori':120 'caution':249 'challeng':96,243 'confirm':238 'consum':245 'content':78 'crawl':85 'data':71,77,122,220,262 'decim':109 'document':81,175,211,254 'ehr':5,19,70,219 'ehr-data' 'electron':67 'electronic health record' 'emphas':142 'endpoint':6,20,30,63,88,160,236 'equal':111 'exact':74 'exampl':179 'expect':229 'explan':216 'financ':127 'given':250 'health':68,260 'health data API' 'homepag':172 'howev':157 'id':196 'identifi':199 'includ':121 'infrastructur':130 'input':176,225 'instant':149 'key':145 'lack':252 'learn':126 'limit':148 'list':167,231 'live':90,239 'lowpaymentfee EHR' 'lowpaymentfee.com':37,117 'machin':125 'materi':86 'max':99 'may':190 'medical records API' 'natur':258 'network':58,156 'no-api-key' 'notabl':162 'offer':40 'openapi':208 'part':34 'path':189 'pay':2,16,46 'pay-per-cal':1,15 'pay-per-request':45 'payment':152 'per':3,17,47,113 'platform':38,118,141 'point':139 'post':227 'price':138 'proceed':247 'protocol':54 'public':166 'rate':147 'record':69,195,261 'refer':191 'request':48,114 'request/response':212 'resourc':198 'respons':180 'return':92,222 'schema':75,177,213 'sensit':257 'serv':66 'settl':50 'signific':233 'spec':209 'specif':62,194 'though':72 'uncertainti':234 'unconfirm':203 'unit':105 'usdc':14,28,60,107 'usdc-settlement' 'use':59 'util':131 'valid':94 'via':9,23,51,240 'web3':128 'x402':10,24,53,95 'x402 health endpoint' 'x402-payment'","prices":[{"id":"8d60f7bb-27ce-46d8-a046-0e0a41456c7e","listingId":"e1570d16-6ca8-47d0-96fe-1bffedac53c9","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/90","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:10.597Z"}],"sources":[{"listingId":"e1570d16-6ca8-47d0-96fe-1bffedac53c9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/90","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:10.597Z","lastSeenAt":"2026-04-22T13:32:09.162Z"}],"details":{"listingId":"e1570d16-6ca8-47d0-96fe-1bffedac53c9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/90 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{}'","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/90"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The /api/v1/ehr/90 endpoint is not listed among the publicly advertised APIs on the homepage","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving electronic health record data on a per-request basis","Integrating EHR data into agent workflows without subscription commitments","Accessing health data via crypto-native micropayments"],"bestFor":["Developers needing on-demand EHR data access without API key management","Agent-based systems that can settle payments via x402 on Base","Prototyping health data integrations with low per-call cost"],"notFor":["Production healthcare systems requiring HIPAA-compliant, audited data pipelines","Use cases needing well-documented request/response schemas before integration","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:22.059Z"},"updatedAt":"2026-04-22T13:32:09.162Z"}}