{"id":"47e9e25e-d6a2-4160-b0a8-2693882d36b6","shortId":"Lq7ja7","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/30` 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/30` path suggests an Electronic Health Records (EHR) resource, though the provider's landing page does not explicitly document this particular endpoint or its request/response schema. The listing title is simply \"Premium API Access.\"\n\nThe endpoint is live and returns a valid x402 challenge on POST. Payment is settled on the Base network using USDC (contract `0x8335…2913`) with a `maxAmountRequired` of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). This matches the provider's advertised flat rate of $0.02 per request across all endpoints. 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\nBecause the crawled documentation pages (`/docs`, `/api`, `/pricing`, `/README`) all returned only a \"Connect wallet\" stub with no substantive content, there is no schema documentation, example payloads, or detailed description of what the `/ehr/30` endpoint actually returns. The endpoint's purpose (EHR data) is inferred solely from the URL path. Callers should exercise caution, especially given that health data may be subject to regulatory requirements (HIPAA in the US, GDPR in the EU, etc.).","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-settlement","base-network","ehr-data","no-api-key","pay-per-call"],"categories":["health","data"],"synonyms":["electronic health records","EHR API","health data endpoint","x402 EHR","medical records API","lowpaymentfee","pay-per-call health API"],"warnings":["No request or response schema documentation available — all doc pages return only 'Connect wallet' stubs","The endpoint path suggests Electronic Health Records, a regulated data category (HIPAA, GDPR), but no compliance or data-handling documentation is provided","The exact data returned by /api/v1/ehr/30 is unknown; 'EHR' is inferred solely from the URL path","No OpenAPI spec, no AI plugin manifest, and no robots.txt or agents.txt present"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/30","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/30","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is zero documentation on request/response schema, no examples, and no explanation of what /ehr/30 actually returns. All doc pages are stubs. The EHR purpose is inferred only from the URL path. Regulated health-data category adds 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'/api/v1/ehr/30':38 '/docs':190 '/ehr/30':71,218 '/pricing':192 '/readme':193 '0.02':9,26,139,153 '000':134 '0x8335':127 '20':133 '2913':128 '6':142 'EHR API' 'access':104,170 'across':156 'actual':220 'advertis':149,161 'ai/ml':62 'analyt':61 'api':15,32,58,103,163 'attach':173 'base':7,24,122,135 'base-network' 'broad':48 'call':57 'caller':171,235 'catalog':49 'caution':238 'challeng':114 'connect':198 'content':204 'contract':126 'crawl':187 'crypto':65 'data':60,227,243 'decim':143 'descript':214 'detail':213 'document':89,188,209 'ehr':4,21,78,226 'ehr-data' 'electron':75 'electronic health records' 'endpoint':5,22,36,92,106,158,219,223 'equal':138 'especi':239 'etc':258 'eu':257 'exampl':210 'exercis':237 'explicit':88 'financ':64 'flat':150 'gate':3,20 'gdpr':254 'given':240 'header':178 'health':76,242 'health data endpoint' 'hipaa':250 'infer':63,229 'instant':169 'key':16,33,164 'land':84 'limit':167 'list':98 'live':108 'lowpaymentfee' 'lowpaymentfee.com':43 'match':145 'maxamountrequir':131 'may':244 'medical records API' 'network':123 'no-api-key' 'offer':46 'page':85,189 'part':40 'particular':91 'path':72,234 'pay':8,25,55 'pay-per-cal':54 'pay-per-call' 'pay-per-call health API' 'payload':211 'payment':117,177,183 'per':10,27,56,154 'per-request-billing' 'platform':44,160 'post':116 'premium':102 'proof':184 'protocol':53 'provid':82,147 'purpos':225 'rate':151,166 'record':77 'regulatori':248 'request':11,28,155 'request/response':95 'requir':17,34,249 'resourc':79 'return':110,195,221 'schema':96,208 'servic':68 'settl':119 'simpli':101,172 'sole':230 'span':59 'specif':70 'stub':200 'subject':246 'substant':203 'suggest':73 'though':80 'titl':99 'unit':136 'url':233 'us':253 'usdc':13,30,125,140 'usdc-settlement' 'use':124,141 'util':67 'valid':112,181 'wallet':199 'x':176 'x-payment':175 'x402':2,19,52,113,182 'x402 EHR' 'x402-gated':1,18 'x402-payment' 'x402-protocol':51","prices":[{"id":"fcc6246e-ae1d-4182-ae0c-fd2a29d99585","listingId":"47e9e25e-d6a2-4160-b0a8-2693882d36b6","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/30","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:09.793Z"}],"sources":[{"listingId":"47e9e25e-d6a2-4160-b0a8-2693882d36b6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/30","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:09.793Z","lastSeenAt":"2026-04-22T18:32:56.270Z"}],"details":{"listingId":"47e9e25e-d6a2-4160-b0a8-2693882d36b6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/30 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_proof>\" \\\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 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ehr/30"},{"claim":"USDC contract address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/ehr/30"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) return only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving electronic health record data on a per-request basis without subscription commitments","Integrating EHR lookups into agent workflows that support x402 micropayments","Accessing health data programmatically with crypto-native payment rails"],"bestFor":["Developers or agents needing on-demand EHR data with no signup or API key","x402-compatible agents that can settle USDC payments on Base","Low-volume or exploratory health data access at $0.02 per call"],"notFor":["Production healthcare applications requiring HIPAA-compliant audit trails and BAAs — no compliance documentation is provided","High-volume bulk EHR data extraction where per-request pricing would be costly","Users who need detailed API documentation or guaranteed SLAs before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:23.048Z"},"updatedAt":"2026-04-22T18:32:56.270Z"}}