{"id":"21da3a80-6781-4d2b-84b4-7e1bb30fc79b","shortId":"4zqznz","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 lowpaymentfee.com provides access to an Electronic Health Record (EHR) resource at `/api/v1/ehr/99` via the x402 payment protocol. The endpoint is live and returns a standard 402 challenge requesting payment in USDC on the Base network. The price is 20,000 base units of USDC (6 decimals), which equals $0.02 per request, consistent with the site-wide pricing of $0.02/request advertised on the provider's landing page.\n\nThe provider, lowpaymentfee.com, hosts a broad catalog of x402-gated APIs spanning data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all at the same $0.02/request price point. The platform advertises no API keys, no rate limits, and instant access; payment is settled on-chain via USDC on Base. The specific `/api/v1/ehr/99` endpoint is not listed on the provider's public catalog page, so its exact data schema and response format are unknown. The description in the x402 challenge is simply \"Premium API Access\" and the MIME type is `application/json`.\n\nBecause there is no OpenAPI spec, no documentation beyond the landing page, and no example request/response for this particular EHR endpoint, the actual data returned is unclear. The endpoint accepts POST requests. Callers should be aware that EHR data may be subject to healthcare data regulations (e.g., HIPAA in the US), and the provider offers no visible compliance documentation.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-billing","json-response","post-method","ehr-data"],"categories":["health","data"],"synonyms":["electronic health record","EHR API","health data endpoint","medical record API","x402 health API","lowpaymentfee EHR"],"warnings":["The /api/v1/ehr/99 endpoint is not listed on the provider's public API catalog — its purpose and data schema are unverified.","EHR (Electronic Health Record) data may be subject to healthcare privacy regulations (e.g., HIPAA). No compliance documentation is provided by the site.","No OpenAPI spec, no docs, and no example responses are available for this endpoint.","The docs, API, pricing, and README pages all returned only 'Connect wallet' with no substantive content."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/99","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/99","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation for this specific EHR endpoint, no example request/response, and the endpoint is not even listed on the provider's public catalog. The nature of the data returned is entirely 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'/request':98,132 '0.02':9,26,86,97,131 '000':77 '20':76 '402':63 '6':82 'EHR API' 'accept':227 'access':40,146,191 'actual':220 'advertis':99,137 'ai/ml':121 'analyt':120 'api':15,32,117,139,190 'application/json':197 'awar':233 'base':7,24,71,78,156 'beyond':206 'broad':111 'caller':230 'catalog':112,169 'chain':152 'challeng':64,186 'complianc':255 'consist':89 'data':119,174,221,236,242 'decim':83 'descript':182 'document':205,256 'e.g':244 'ehr':4,21,46,217,235 'ehr-data' 'electron':43 'electronic health record' 'endpoint':5,22,36,56,160,218,226 'equal':85 'exact':173 'exampl':212 'finance/web3':123 'format':178 'gate':3,20,116 'health':44 'health data endpoint' 'healthcar':241 'hipaa':245 'host':109 'infer':122 'infrastructur':125 'instant':145 'json-response' 'key':16,33,140 'land':104,208 'limit':143 'list':163 'live':58 'lowpaymentfee EHR' 'lowpaymentfee.com':38,108 'may':237 'medical record API' 'mime':194 'network':72 'offer':252 'on-chain':150 'openapi':202 'page':105,170,209 'particular':216 'pay':8,25 'payment':53,66,147 'per':10,27,87 'per-request-billing' 'platform':136 'point':134 'post':228 'post-method' 'premium':189 'price':74,95,133 'protocol':54 'provid':39,102,107,166,251 'public':168 'rate':142 'record':45 'regul':243 'request':11,28,65,88,229 'request/response':213 'requir':17,34 'resourc':47 'respons':177 'return':60,222 'schema':175 'settl':149 'simpli':188 'site':93 'site-wid':92 'span':118 'spec':203 'specif':158 'standard':62 'subject':239 'type':195 'unclear':224 'unit':79 'unknown':180 'us':248 'usdc':13,30,68,81,154 'usdc-base' 'util':126 'via':50,153 'visibl':254 'wide':94 'x402':2,19,52,115,185 'x402 health API' 'x402-gated':1,18,114 'x402-payment'","prices":[{"id":"f01e5f80-7c7b-4bc0-bc35-5a34904cb027","listingId":"21da3a80-6781-4d2b-84b4-7e1bb30fc79b","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/99","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:10.427Z"}],"sources":[{"listingId":"21da3a80-6781-4d2b-84b4-7e1bb30fc79b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/99","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:10.427Z","lastSeenAt":"2026-04-22T15:02:41.219Z"}],"details":{"listingId":"21da3a80-6781-4d2b-84b4-7e1bb30fc79b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/99 \\\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 x402 challenge returns maxAmountRequired of 20000 in USDC (asset 0x8335…) on Base, equaling $0.02 per request.","source_url":"https://lowpaymentfee.com/api/v1/ehr/99"},{"claim":"Site-wide pricing is $0.02/request with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The provider lists APIs across data & analytics, AI/ML, finance/Web3, and infrastructure categories but does not list /api/v1/ehr/99.","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving electronic health record data for a specific resource (ID 99)","Integrating EHR data into health-tech applications via pay-per-call","Agent-driven healthcare data retrieval without API key management"],"bestFor":["Developers needing on-demand EHR data without subscription commitments","AI agents that can settle x402 USDC payments on Base","Prototyping health data integrations with minimal setup"],"notFor":["Production healthcare systems requiring HIPAA-compliant, audited data pipelines","Use cases needing bulk or batch EHR data retrieval at scale","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:22.231Z"},"updatedAt":"2026-04-22T15:02:41.219Z"}}