{"id":"c8c37bda-0af9-4d29-8e81-08fbf73410f3","shortId":"qEkCmf","kind":"x402","title":"x402-gated EHR endpoint on Base, pay $0.02 per request in USDC with no API keys.","tagline":"x402-gated EHR endpoint on Base, pay $0.02 per request in USDC with no API keys.","description":"This endpoint at `/api/v1/ehr/74` is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance, and utility services. The specific `/ehr/74` path suggests an Electronic Health Record (EHR) resource, though the provider's landing page does not explicitly list or document this particular endpoint. The platform advertises a flat $0.02 per request pricing model across all endpoints.\n\nPayment is handled via the x402 protocol on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The probe confirms the endpoint is live, returning a 402 challenge with `maxAmountRequired` of 20000 base units, which equals $0.02 (USDC uses 6 decimals). The endpoint accepts POST requests and returns `application/json`. No API keys, rate limits, or upfront commitments are required — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof.\n\nDocumentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the `/ehr/74` endpoint actually returns. The EHR designation raises potential concerns about health data regulation (HIPAA, etc.), but no information is available to assess compliance.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-settlement","base-network","ehr-data","json-response","no-api-key","post-method"],"categories":["health","data"],"synonyms":["electronic health record","EHR API","health data endpoint","x402 EHR","pay-per-call health API","lowpaymentfee","medical records API"],"warnings":["The /ehr/74 path is not listed among the provider's advertised APIs — it may be undocumented, experimental, or deprecated.","No request or response schema is available; callers cannot know what data to send or expect back.","EHR (Electronic Health Record) data may be subject to HIPAA or other health data regulations — no compliance information is provided.","All documentation pages (docs, API, pricing, README) returned only a 'Connect wallet' prompt with no content."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/74","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/74","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is zero documentation on what /api/v1/ehr/74 actually returns, no request/response schema, and no examples. The EHR path is not listed on the provider's landing page. This is effectively a stub 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'/ehr/74':69,214 '0.02':9,26,98,140 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':120 '20000':135 '402':130 '6':143 'EHR API' 'accept':147 'across':103 'actual':216 'advertis':95 'ai/ml':61 'analyt':60 'api':16,33,57,154,184 'application/json':152 'assess':236 'attach':165 'avail':234 'base':7,24,115,136 'base-network' 'caller':163 'challeng':131 'collect':48 'commit':160 'complianc':237 'concern':223 'confirm':123 'connect':193 'content':199 'contract':119 'crawl':182 'data':59,226 'decim':144 'descript':210 'design':220 'doc':183 'document':89,177 'ehr':4,21,76,219 'ehr-data' 'electron':73 'electronic health record' 'endpoint':5,22,36,92,105,125,146,215 'equal':139 'etc':229 'exampl':207 'explicit':86 'extrem':179 'financ':63 'flat':97 'gate':3,20 'handl':108 'header':170 'health':74,225 'health data endpoint' 'hipaa':228 'infer':62 'inform':232 'json-response' 'key':17,34,155 'land':82 'limit':157 'list':87 'live':127 'lowpaymentfee' 'lowpaymentfee.com':43 'maxamountrequir':133 'medical records API' 'model':102 'network':116 'no-api-key' 'offer':46 'openapi':203 'page':83,188 'part':40 'particular':91 'path':70 'pay':8,25,54 'pay-per-call health API' 'pay-per-request':53 'payment':106,169,175 'per':10,27,55,99 'platform':44,94 'post':148 'post-method' 'potenti':222 'price':101,185 'probe':122 'prompt':195 'proof':176 'protocol':52,112 'provid':80 'rais':221 'rate':156 'readm':187 'record':75 'regul':227 'request':11,28,56,100,149 'request/response':206 'requir':162 'resourc':77 'return':128,151,190,217 'schema':204 'servic':66 'simpli':164 'span':58 'spars':180 'specif':68 'substant':198 'suggest':71 'though':78 'unit':137 'upfront':159 'usdc':13,30,118,141 'usdc-settlement' 'use':117,142 'util':65 'valid':173 'via':109 'wallet':194 'x':168 'x-payment':167 'x402':2,19,51,111,174 'x402 EHR' 'x402-gated':1,18 'x402-payment' 'x402-protocol':50","prices":[{"id":"0bf669f3-af9f-42f1-b947-5dce901c9af8","listingId":"c8c37bda-0af9-4d29-8e81-08fbf73410f3","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/74","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:10.480Z"}],"sources":[{"listingId":"c8c37bda-0af9-4d29-8e81-08fbf73410f3","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/74","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:10.480Z","lastSeenAt":"2026-04-22T15:02:41.257Z"}],"details":{"listingId":"c8c37bda-0af9-4d29-8e81-08fbf73410f3","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/74 \\\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","source_url":"https://lowpaymentfee.com/api/v1/ehr/74"},{"claim":"Platform advertises $0.02 per request flat pricing 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/74"}],"useCases":["Retrieving electronic health record data for a specific resource (ID 74)","Integrating EHR data into agent workflows without managing API keys","Paying per-request for health data access using USDC on Base"],"bestFor":["Agents needing on-demand EHR data with crypto micropayments","Developers prototyping health data integrations without subscription commitments","x402-compatible wallets seeking low-friction API access"],"notFor":["Production healthcare applications requiring HIPAA-compliant, audited data pipelines","Users who need detailed API documentation or schema validation before integration","Non-crypto users who cannot settle payments in USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:22.181Z"},"updatedAt":"2026-04-22T15:02:41.257Z"}}