{"id":"3e9eeff8-ac70-4840-9a1e-92fb40128004","shortId":"wqjjrE","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 via the x402 payment protocol. The specific path `/api/v1/ehr/100` suggests retrieval of a particular EHR record (ID 100). Payment is settled on the Base network using USDC (contract 0x8335…2913) at a cost of $0.02 per request (20,000 base units with 6 decimals). The endpoint accepts POST requests and returns application/json responses.\n\nThe broader lowpaymentfee.com platform hosts a variety of x402-gated APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all priced uniformly at $0.02 per call. The platform advertises no API keys, no rate limits, and instant access. However, documentation is extremely thin: the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further technical detail, schemas, or example payloads.\n\nBecause there is no OpenAPI spec, no request/response schema documentation, and no explanation of what the EHR endpoint actually returns, this listing carries significant uncertainty. The endpoint is confirmed live (returns a valid x402 402 challenge), but the actual data content, required POST body fields, and response structure are unknown.","tags":[],"capabilities":["x402-payment","ehr-data","usdc-payment","base-network","per-request-billing","no-api-key"],"categories":["health","data"],"synonyms":["electronic health record","EHR API","health data API","medical record endpoint","x402 health API","pay-per-call EHR"],"warnings":["No API documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no content.","No request body schema or response schema documented; callers cannot know what to send or what they will receive.","EHR (Electronic Health Record) data may be subject to HIPAA and other health-data regulations — provenance and compliance status are unknown.","It is unclear whether this endpoint returns real patient data, synthetic/demo data, or placeholder content.","The 'extra.name' field says 'USD Coin' and 'version: 2', confirming USDC, but no further token metadata is provided."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/100","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/100","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, confirming pricing and network. However, there is zero documentation on request/response schemas, no OpenAPI spec, and the docs pages are empty. The nature of the EHR data is completely undocumented, making this effectively a stub 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'/api/v1/ehr/100':56 '/docs':148 '/pricing':149 '/readme':152 '0.02':9,26,82,127 '000':86 '0x8335':76 '100':65 '20':85 '2913':77 '402':204 '6':90 'EHR API' 'accept':94 'access':40,141 'actual':188,208 'advertis':132 'ai/ml':116 'analyt':115 'api':15,32,112,134 'application/json':99 'base':7,24,71,87 'base-network' 'bodi':213 'broader':102 'call':129 'carri':192 'challeng':205 'confirm':198 'connect':158 'content':210 'contract':75 'cost':80 'crypto':119 'data':114,209 'decim':91 'detail':165 'document':143,179 'ehr':4,21,46,62,186 'ehr-data' 'electron':43 'electronic health record' 'endpoint':5,22,36,93,187,196 'exampl':168 'explan':182 'extrem':145 'field':214 'financ':118 'gate':3,20,111 'health':44 'health data API' 'host':105 'howev':142 'id':64 'infer':117 'instant':140 'key':16,33,135 'limit':138 'list':191 'live':199 'lowpaymentfee.com':38,103 'medical record endpoint' 'network':72 'no-api-key' 'openapi':174 'page':153 'particular':61 'path':55 'pay':8,25 'pay-per-call EHR' 'payload':169 'payment':51,66 'per':10,27,83,128 'per-request-billing' 'platform':104,131 'post':95,212 'price':124 'prompt':160 'protocol':52 'provid':39 'rate':137 'record':45,63 'render':155 'request':11,28,84,96 'request/response':177 'requir':17,34,211 'resourc':47 'respons':100,216 'retriev':58 'return':98,189,200 'schema':166,178 'servic':122 'settl':68 'signific':193 'span':113 'spec':175 'specif':54 'structur':217 'suggest':57 'technic':164 'thin':146 'uncertainti':194 'uniform':125 'unit':88 'unknown':219 'usdc':13,30,74 'usdc-payment' 'use':73 'util':121 'valid':202 'varieti':107 'via':48 'wallet':159 'x402':2,19,50,110,203 'x402 health API' 'x402-gated':1,18,109 'x402-payment'","prices":[{"id":"69dac580-0c57-4a14-9f7c-9815879de206","listingId":"3e9eeff8-ac70-4840-9a1e-92fb40128004","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/100","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-19T12:29:45.134Z"}],"sources":[{"listingId":"3e9eeff8-ac70-4840-9a1e-92fb40128004","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/100","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T12:29:45.134Z","lastSeenAt":"2026-04-22T20:01:52.874Z"}],"details":{"listingId":"3e9eeff8-ac70-4840-9a1e-92fb40128004","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/100 \\\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":"Endpoint returns x402 402 challenge with maxAmountRequired 20000 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ehr/100"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ehr/100"},{"claim":"Documentation pages (/docs, /pricing, /api, /README) contain only 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving electronic health record data on a per-request payment basis","Integrating EHR lookups into agent workflows without managing API keys","Accessing health data via crypto micropayments on Base"],"bestFor":["Developers needing on-demand EHR data without subscription commitments","AI agents that can settle x402 payments autonomously on Base","Prototyping health-data integrations with minimal setup"],"notFor":["Production healthcare systems requiring HIPAA-compliant, audited data pipelines","Users who need detailed API documentation and guaranteed SLAs before integrating","Bulk EHR data retrieval at scale (no documented batch endpoints)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:23.585Z"},"updatedAt":"2026-04-22T20:01:52.874Z"}}