{"id":"8ceaecb3-d2f3-4454-bf98-df56cecd46b7","shortId":"xgVMTt","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/51` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-call APIs spanning data analytics, AI/ML, finance, infrastructure utilities, and more. The specific resource at path `/ehr/51` is labeled \"Premium API Access\" but its exact data payload is undocumented — the \"ehr\" path segment suggests Electronic Health Records, though no schema or sample response is provided by the site.\n\nPayment is handled via the x402 protocol on the Base network. The challenge advertises a max amount of 20,000 base units of USDC (contract `0x8335…2913`, 6 decimals), which equals $0.02 per request. No API keys, rate limits, or subscriptions are required; callers simply attach an `X-PAYMENT` header with a valid x402 payment proof. The endpoint accepts HTTP POST and returns `application/json`.\n\nThe provider's landing page lists dozens of similarly priced endpoints across categories (analytics, AI, finance, utilities), all at $0.02/request. However, documentation is essentially nonexistent — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no description of what data this particular EHR endpoint returns. Prospective callers should treat this as an exploratory integration until the provider publishes proper documentation.","tags":[],"capabilities":["x402-payment","per-call-pricing","usdc-base","no-api-key","json-response","http-post","ehr-data"],"categories":["health","data"],"synonyms":["electronic health records API","EHR endpoint","pay-per-call health data","x402 EHR","USDC micropayment API","lowpaymentfee EHR","Base network API"],"warnings":["No documentation exists for this endpoint — /docs, /pricing, /README all show only 'Connect wallet'","The 'ehr' path suggests Electronic Health Records, which is a regulated data category (HIPAA, GDPR) — no compliance information is provided","No OpenAPI spec or request/response schema available","No example responses; actual data content is unknown","Provider identity and data sourcing are opaque"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/51","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/51","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (returns a valid x402 402 challenge) and pricing is clear ($0.02 USDC on Base). However, there is zero documentation on what the EHR endpoint actually returns — no request schema, no response schema, no examples, and the docs/pricing/README pages are empty. The 'ehr' path is unexplained. This is effectively a stub 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'/api/v1/ehr/51':38 '/docs':194 '/ehr/51':70 '/pricing':196 '/readme':198 '/request':187 '0.02':9,26,133,186 '000':121 '0x8335':127 '20':120 '2913':128 '6':129 'Base network API' 'EHR endpoint' 'USDC micropayment API' 'accept':161 'access':75 'across':178 'advertis':115 'ai':181 'ai/ml':59 'amount':118 'analyt':58,180 'api':15,32,55,74,137 'application/json':166 'attach':147 'base':7,24,111,122 'call':54 'caller':145,231 'categori':179 'challeng':114 'collect':46 'connect':204 'content':210 'contract':126 'data':57,79,224 'decim':130 'descript':221 'document':189,244 'dozen':173 'ehr':4,21,84,227 'ehr-data' 'electron':88 'electronic health records API' 'endpoint':5,22,36,160,177,228 'equal':132 'essenti':191 'exact':78 'exploratori':237 'financ':60,182 'gate':3,20 'handl':104 'header':152 'health':89 'howev':188 'http':162 'http-post' 'infrastructur':61 'integr':238 'json-response' 'key':16,33,138 'label':72 'land':170 'limit':140 'list':172 'lowpaymentfee EHR' 'lowpaymentfee.com':43 'max':117 'network':112 'no-api-key' 'nonexist':192 'openapi':214 'page':171,199 'part':40 'particular':226 'path':69,85 'pay':8,25,52 'pay-per-cal':51 'pay-per-call health data' 'payload':80 'payment':102,151,157 'per':10,27,53,134 'per-call-pricing' 'platform':44 'post':163 'premium':73 'price':176 'prompt':206 'proof':158 'proper':243 'prospect':230 'protocol':50,108 'provid':98,168,241 'publish':242 'rate':139 'record':90 'render':201 'request':11,28,135 'request/response':217 'requir':17,34,144 'resourc':67 'respons':96 'return':165,229 'sampl':95 'schema':93,218 'segment':86 'similar':175 'simpli':146 'site':101 'span':56 'spec':215 'specif':66 'subscript':142 'suggest':87 'though':91 'treat':233 'undocu':82 'unit':123 'usdc':13,30,125 'usdc-base' 'util':62,183 'valid':155 'via':105 'wallet':205 'x':150 'x-payment':149 'x402':2,19,49,107,156 'x402 EHR' 'x402-gated':1,18 'x402-payment' 'x402-protocol':48","prices":[{"id":"9b5eecab-7ce5-42e2-b607-7f2c850ec85a","listingId":"8ceaecb3-d2f3-4454-bf98-df56cecd46b7","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/51","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:10.078Z"}],"sources":[{"listingId":"8ceaecb3-d2f3-4454-bf98-df56cecd46b7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/51","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:10.078Z","lastSeenAt":"2026-04-22T16:32:32.959Z"}],"details":{"listingId":"8ceaecb3-d2f3-4454-bf98-df56cecd46b7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/51 \\\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 maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/ehr/51"},{"claim":"All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ehr/51"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving health record data (EHR) on a pay-per-call basis without subscription","Integrating EHR lookups into agent workflows that support x402 payments","Exploring x402-protocol micropayment patterns for data access"],"bestFor":["Developers experimenting with x402 pay-per-call protocols","Agents needing on-demand EHR data access without API key management","Low-volume, ad-hoc health data queries"],"notFor":["Production healthcare systems requiring HIPAA-compliant, well-documented APIs","High-volume bulk EHR data extraction (no documented batch support)","Users who need detailed request/response schemas before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:22.684Z"},"updatedAt":"2026-04-22T16:32:32.959Z"}}