{"id":"30bff86a-7a15-4176-884b-c5ab2c46271d","shortId":"aEyFaU","kind":"x402","title":"x402-gated premium API endpoint on Base, pay-per-request with USDC.","tagline":"x402-gated premium API endpoint on Base, pay-per-request with USDC.","description":"This endpoint at `/api/v1/ehr/79` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML, finance, infrastructure utilities, and more. The specific `/api/v1/ehr/79` path is labeled \"Premium API Access\" but its exact functionality is not documented on the provider's site — the \"ehr\" path segment suggests it may relate to Electronic Health Records or a similar domain, but this is unconfirmed.\n\nThe endpoint is live and returns a valid x402 payment challenge. It accepts POST requests and settles payments in USDC on the Base network. The maximum amount required per request is 20,000 base units of USDC (6 decimals), which equals $0.02 USD — consistent with the platform's uniform $0.02/request pricing across all listed endpoints. No API keys are required; access is granted purely through the x402 payment protocol. The platform advertises no rate limits and instant access.\n\nDocumentation is extremely sparse. The provider's docs, API, pricing, 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 data this endpoint actually returns. The endpoint's purpose must be treated as uncertain until the provider publishes proper documentation.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-endpoint"],"categories":["data","health"],"synonyms":["electronic health records API","EHR API","premium data access","x402 API","pay-per-call API","lowpaymentfee","USDC micropayment API"],"warnings":["The exact purpose and data returned by /api/v1/ehr/79 are undocumented and unknown.","The 'ehr' path segment may imply health data, which could fall under regulated categories (HIPAA, etc.) — no compliance information is provided.","All documentation pages (docs, API, pricing, README) returned no useful content beyond 'Connect wallet'.","No OpenAPI schema, request format, or response examples are available.","This endpoint is not listed among the provider's publicly advertised APIs on the homepage."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/79","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/79","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/79 actually does, no request/response schema, and no examples. The crawled docs/pricing/README pages are all blank beyond a wallet-connect prompt. The endpoint's purpose is essentially 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'/request':150 '0.02':141,149 '000':132 '20':131 '6':137 'EHR API' 'USDC micropayment API' 'accept':112 'access':67,161,178 'across':152 'actual':219 'advertis':172 'ai/ml':53 'amount':126 'analyt':52 'api':5,19,49,66,157,187 'base':8,22,122,133 'base-network' 'challeng':110 'collect':40 'connect':196 'consist':143 'content':202 'data':51,216 'decim':138 'descript':213 'doc':186 'document':74,179,235 'domain':95 'ehr':81 'electron':89 'electronic health records API' 'endpoint':6,20,30,101,155,218,222 'equal':140 'exact':70 'exampl':210 'extrem':181 'financ':54 'function':71 'gate':3,17 'grant':163 'health':90 'infrastructur':55 'instant':177 'key':158 'label':64 'limit':175 'list':154 'live':103 'lowpaymentfee' 'lowpaymentfee.com':37 'maximum':125 'may':86 'must':225 'network':123 'no-api-key' 'openapi':206 'page':191 'part':34 'path':62,82 'pay':10,24,46 'pay-per-call API' 'pay-per-request':9,23,45 'payment':109,117,168 'per':11,25,47,128 'platform':38,146,171 'post':113 'post-endpoint' 'premium':4,18,65 'premium data access' 'price':151,188 'prompt':198 'proper':234 'protocol':44,169 'provid':77,184,232 'publish':233 'pure':164 'purpos':224 'rate':174 'readm':190 'record':91 'relat':87 'render':193 'request':12,26,48,114,129 'request/response':209 'requir':127,160 'return':105,220 'schema':207 'segment':83 'settl':116 'similar':94 'site':79 'span':50 'spars':182 'specif':60 'substant':201 'suggest':84 'treat':227 'uncertain':229 'unconfirm':99 'uniform':148 'unit':134 'usd':142 'usdc':14,28,119,136 'usdc-settlement' 'util':56 'valid':107 'wallet':197 'x402':2,16,43,108,167 'x402 API' 'x402-gated':1,15 'x402-payment' 'x402-protocol':42","prices":[{"id":"ab1be049-fd25-4030-8305-a17bb3ea2144","listingId":"30bff86a-7a15-4176-884b-c5ab2c46271d","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/79","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:10.405Z"}],"sources":[{"listingId":"30bff86a-7a15-4176-884b-c5ab2c46271d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/79","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:10.405Z","lastSeenAt":"2026-04-22T15:02:41.156Z"}],"details":{"listingId":"30bff86a-7a15-4176-884b-c5ab2c46271d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/79 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ehr/79"},{"claim":"The platform advertises $0.02/request pricing, no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/ehr/79"},{"claim":"Documentation pages render only a 'Connect wallet' prompt with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium data behind an x402 paywall without API key management","Agent-driven pay-per-request data retrieval on Base network","Programmatic access to an EHR-like resource (unconfirmed purpose)"],"bestFor":["Developers wanting keyless, pay-per-call API access","AI agents with x402 payment capability on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Anyone needing well-documented, production-grade EHR integrations with compliance guarantees","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:22.291Z"},"updatedAt":"2026-04-22T15:02:41.156Z"}}