{"id":"283af28d-383f-4688-8b94-5501088049a0","shortId":"U3LypA","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/83` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-call APIs spanning data analytics, AI/ML, finance, infrastructure, and more. The specific resource at path `/ehr/83` is labeled \"Premium API Access\" but its exact functionality is unclear — the path segment \"ehr\" may suggest Electronic Health Records or a similar domain, but no documentation or schema describes the request/response format for this particular endpoint.\n\nThe endpoint is live and returns a valid x402 challenge over the Base network. Payment is settled in USDC (contract `0x8335…2913`) with a maximum amount of 20,000 base units, which at 6 decimals equals $0.02 per request. The platform advertises uniform $0.02/request pricing across all endpoints, no API keys, no rate limits, and instant access. The x402 challenge specifies the POST method and a 300-second payment timeout.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no example payloads available for this or any other endpoint on the platform. The actual data returned by `/api/v1/ehr/83` cannot be determined from the available material.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-method"],"categories":["data","health"],"synonyms":["electronic health records","EHR API","health data","premium API","x402 API","pay-per-call API","lowpaymentfee","USDC micropayment API"],"warnings":["The endpoint path '/api/v1/ehr/83' is not listed among the advertised APIs on the landing page — it may be an unlisted or experimental resource.","No documentation exists for this endpoint: no schema, no examples, no description of what data is returned.","The 'ehr' path segment suggests possible health/medical data, which may fall under regulated categories (HIPAA, etc.) — no compliance information is provided.","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no substantive content."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/83","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/83","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 the /ehr/83 resource actually returns. No OpenAPI spec, no request/response schema, no examples. The \"EHR\" path is ambiguous and undocumented. This is effectively a stub 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'/ehr/83':69 '/request':151 '0.02':9,26,143,150 '000':135 '0x8335':127 '20':134 '2913':128 '300':174 '6':140 'EHR API' 'USDC micropayment API' 'access':74,164 'across':153 'actual':223 'advertis':148 'ai/ml':59 'amount':132 'analyt':58 'api':15,32,55,73,157,184 'avail':212,233 'base':7,24,119,136 'base-network' 'call':54 'cannot':228 'challeng':116,167 'collect':46 'connect':193 'content':199 'contract':126 'data':57,224 'decim':141 'describ':99 'determin':230 'doc':183 'document':96,178 'domain':93 'ehr':4,21,84 'electron':87 'electronic health records' 'endpoint':5,22,36,106,108,155,218 'equal':142 'exact':77 'exampl':210 'extrem':180 'financ':60 'format':102 'function':78 'gate':3,20 'health':88 'health data' 'infrastructur':61 'instant':163 'key':16,33,158 'label':71 'limit':161 'live':110 'lowpaymentfee' 'lowpaymentfee.com':43 'materi':234 'maximum':131 'may':85 'method':171 'network':120 'no-api-key' 'openapi':203 'page':188 'part':40 'particular':105 'path':68,82 'pay':8,25,52 'pay-per-cal':51 'pay-per-call API' 'pay-per-request' 'payload':211 'payment':121,176 'per':10,27,53,144 'platform':44,147,221 'post':170 'post-method' 'premium':72 'premium API' 'price':152,185 'prompt':195 'protocol':50 'rate':160 'readm':187 'record':89 'render':190 'request':11,28,145 'request/response':101,206 'requir':17,34 'resourc':66 'return':112,225 'schema':98,207 'second':175 'segment':83 'settl':123 'similar':92 'span':56 'spars':181 'spec':204 'specif':65 'specifi':168 'substant':198 'suggest':86 'timeout':177 'unclear':80 'uniform':149 'unit':137 'usdc':13,30,125 'usdc-settlement' 'valid':114 'wallet':194 'x402':2,19,49,115,166 'x402 API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':48","prices":[{"id":"f6216cd0-4e0f-4eb9-b18c-e03839874f6d","listingId":"283af28d-383f-4688-8b94-5501088049a0","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/83","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:10.532Z"}],"sources":[{"listingId":"283af28d-383f-4688-8b94-5501088049a0","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/83","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:10.532Z","lastSeenAt":"2026-04-22T13:32:09.119Z"}],"details":{"listingId":"283af28d-383f-4688-8b94-5501088049a0","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/83 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","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 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/ehr/83"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/ehr/83"},{"claim":"Platform advertises $0.02/request pricing, no API keys, no rate limits, instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The /api/v1/ehr/83 path is not listed among the advertised endpoints on the landing page","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing health-related or premium data records via a single paid API call","Agent-driven workflows that need keyless, pay-per-request data access on Base","Programmatic retrieval of record ID 83 from the EHR endpoint"],"bestFor":["Developers wanting zero-signup, pay-as-you-go API access","AI agents with x402-compatible wallets on Base","Use cases requiring small per-call payments without subscriptions"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","Bulk data retrieval where per-request pricing would be cost-prohibitive","Anyone needing clarity on what data the endpoint actually returns before paying"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:22.115Z"},"updatedAt":"2026-04-22T13:32:09.119Z"}}