{"id":"e66b941c-4994-4951-a18c-c3e5e36038cf","shortId":"CqJZLn","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 lowpaymentfee.com provides premium API access via the x402 payment protocol. The specific path `/api/v1/ehr/20` suggests an Electronic Health Record (EHR) data endpoint, though the provider's landing page does not explicitly list or document this particular route. The site advertises a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services, all priced at $0.02 per request.\n\nPayment is settled on the Base network using USDC (contract 0x8335…2913) through the x402 \"exact\" scheme. The 402 challenge specifies a maxAmountRequired of 20,000 base units, which at 6 decimals equals $0.02 USD. No API keys, rate limits, or upfront commitments are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof. The endpoint accepts POST requests and returns application/json.\n\nDocumentation is extremely sparse. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/ehr/20` endpoint actually returns. The \"EHR\" path segment and the \"Premium API Access\" label are the only clues about the endpoint's purpose. Prospective users should exercise caution, especially given the potential sensitivity of health-record data.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","ehr-data","json-response","no-api-key"],"categories":["health","data"],"synonyms":["electronic health records","EHR API","health data API","x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee"],"warnings":["The /api/v1/ehr/20 path is not listed on the provider's landing page — its existence and purpose are unverified beyond the 402 challenge.","No documentation, schema, or examples are available for this endpoint.","'EHR' implies health data, which may be subject to regulatory requirements (HIPAA, GDPR). No compliance information is provided.","All secondary pages (docs, pricing, API, README) returned only a 'Connect wallet' prompt with no content."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/20","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/20","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 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the purpose of the /ehr/20 path is entirely undocumented. The docs pages are empty. This is effectively a stub 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'x402-payment'","prices":[{"id":"b3b10051-5fd7-4cdd-ac11-2d91819c8be4","listingId":"e66b941c-4994-4951-a18c-c3e5e36038cf","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/20","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-19T12:29:47.531Z"}],"sources":[{"listingId":"e66b941c-4994-4951-a18c-c3e5e36038cf","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/20","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T12:29:47.531Z","lastSeenAt":"2026-04-22T20:01:53.020Z"}],"details":{"listingId":"e66b941c-4994-4951-a18c-c3e5e36038cf","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/20 \\\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 site advertises APIs at $0.02 per request with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The 402 challenge specifies maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02.","source_url":"https://lowpaymentfee.com/api/v1/ehr/20"},{"claim":"The endpoint accepts POST requests and returns application/json per the x402 challenge.","source_url":"https://lowpaymentfee.com/api/v1/ehr/20"}],"useCases":["Retrieving electronic health record data on a per-request basis","Integrating EHR lookups into agent workflows without managing API keys","Paying for health data access with USDC on Base"],"bestFor":["Developers needing on-demand EHR data without subscription commitments","AI agents that can settle x402 payments autonomously","Prototyping health-data integrations with minimal setup"],"notFor":["Production healthcare applications requiring HIPAA-compliant, audited data pipelines","Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:23.407Z"},"updatedAt":"2026-04-22T20:01:53.020Z"}}