{"id":"9d64e7da-dc29-4c4f-a02b-96c0573b8dbb","shortId":"7bYxRe","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 premium API access to an EHR (Electronic Health Record) resource at path `/api/v1/ehr/66`. It is part of a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all gated via the x402 payment protocol on the Base network.\n\nThe endpoint accepts POST requests and returns JSON. Payment is settled in USDC (contract `0x8335…2913` on Base) at a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals). The x402 challenge is version 1 with the \"exact\" payment scheme and a 300-second timeout. No API keys, subscriptions, or rate limits are advertised; callers simply attach an `X-PAYMENT` header with a valid x402 payment proof.\n\nDocumentation is extremely sparse. The landing page lists available endpoints and pricing, but the `/docs`, `/pricing`, `/api`, and `/README` pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no explanation of what the `/api/v1/ehr/66` endpoint actually returns or what input it expects. The \"EHR\" label suggests electronic health records, but no details about the data source, format, or compliance posture are provided. Prospective users should exercise caution given the healthcare-adjacent naming and total lack of documentation.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","ehr-data","json-api","no-api-key","post-method"],"categories":["health","data"],"synonyms":["electronic health record API","EHR endpoint","health data API","x402 health API","pay-per-call EHR","Base USDC API","lowpaymentfee"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all show only 'Connect wallet'","No OpenAPI or request/response schema provided; input format is unknown","Endpoint labeled 'EHR' (Electronic Health Record) with no information about data provenance, accuracy, or regulatory compliance (e.g., HIPAA)","The specific resource ID '66' is opaque — unclear what entity or record it refers to","Healthcare data endpoints may be subject to regulatory requirements not addressed by the provider"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/66","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/66","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 captured) and pricing is clear ($0.02/request in USDC on Base). However, there is zero documentation on request format, response schema, or what data the EHR endpoint actually provides. No OpenAPI spec exists, and all doc pages render only 'Connect wallet'. The healthcare-adjacent naming with no compliance information is a significant 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'/api/v1/ehr/66':52,210 '/docs':178 '/pricing':179 '/readme':182 '0.02':9,26,118 '000':113 '0x8335':103 '1':130 '20':112 '2913':104 '300':138 '6':123 'Base USDC API' 'EHR endpoint' 'accept':91 'access':42 'actual':212 'adjac':248 'advertis':149 'ai/ml':71 'analyt':70 'api':15,32,41,67,142 'attach':152 'avail':172 'base':7,24,87,106,114 'broader':58 'call':66 'caller':150 'caution':243 'challeng':127 'complianc':235 'connect':188 'content':194 'contract':102 'cost':110 'crypto':74 'data':69,231 'decim':124 'detail':228 'document':164,203,254 'dozen':61 'ehr':4,21,45,220 'ehr-data' 'electron':46,223 'electronic health record API' 'endpoint':5,22,36,90,173,211 'equal':117 'exact':133 'exercis':242 'expect':218 'explan':206 'extrem':166 'financ':73 'format':233 'gate':3,20,79 'given':244 'header':157 'health':47,224 'health data API' 'healthcar':247 'healthcare-adjac':246 'infer':72 'input':216 'json':96 'json-api' 'key':16,33,143 'label':221 'lack':252 'land':169 'limit':147 'list':171 'lowpaymentfee' 'lowpaymentfee.com':38 'maximum':109 'name':249 'network':88 'no-api-key' 'offer':60 'openapi':198 'page':170,183 'part':55 'path':51 'pay':8,25,64 'pay-per-cal':63 'pay-per-call EHR' 'pay-per-request' 'payment':83,97,134,156,162 'per':10,27,65,119 'platform':59 'post':92 'post-method' 'postur':236 'premium':40 'price':175 'prompt':190 'proof':163 'prospect':239 'protocol':84 'provid':39,238 'rate':146 'record':48,225 'render':185 'request':11,28,93,120 'request/response':201 'requir':17,34 'resourc':49 'return':95,213 'schema':202 'scheme':135 'second':139 'servic':77 'settl':99 'simpli':151 'sourc':232 'span':68 'spars':167 'spec':199 'subscript':144 'suggest':222 'timeout':140 'total':251 'unit':115 'usdc':13,30,101,121 'usdc-base' 'use':122 'user':240 'util':76 'valid':160 'version':129 'via':80 'wallet':189 'x':155 'x-payment':154 'x402':2,19,82,126,161 'x402 health API' 'x402-gated':1,18 'x402-payment'","prices":[{"id":"baa2216a-0edb-4405-a4c0-b59f2eacefb0","listingId":"9d64e7da-dc29-4c4f-a02b-96c0573b8dbb","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/66","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:09.990Z"}],"sources":[{"listingId":"9d64e7da-dc29-4c4f-a02b-96c0573b8dbb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/66","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:09.990Z","lastSeenAt":"2026-04-22T16:32:32.847Z"}],"details":{"listingId":"9d64e7da-dc29-4c4f-a02b-96c0573b8dbb","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/66 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with x402 version 1, exact scheme, on Base network, with maxAmountRequired of 20000 in USDC","source_url":"https://lowpaymentfee.com/api/v1/ehr/66"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ehr/66"},{"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, /pricing, /api, /README) render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving electronic health record data for a specific resource (ID 66)","Programmatic access to health data without subscription or API key management","Agent-driven healthcare data retrieval with per-call crypto micropayments"],"bestFor":["Developers needing on-demand EHR data access without signup","AI agents that can settle x402 payments on Base in USDC","Prototyping health data integrations with minimal commitment"],"notFor":["Production healthcare systems requiring HIPAA-compliant, audited data pipelines","Users who need detailed API documentation or schema guarantees before integrating","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:22.82Z"},"updatedAt":"2026-04-22T16:32:32.847Z"}}