{"id":"ebb7b84c-b180-4ab4-bd78-c4bcfd13b44d","shortId":"S7R7uA","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/22` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-request APIs settled in USDC on the Base network. The specific resource appears to be an Electronic Health Record (EHR) endpoint, though the provider's landing page does not list it among its publicly advertised API categories (Data & Analytics, AI & ML, Finance & Web3, Infrastructure). The endpoint is live and returns a valid x402 challenge with a maxAmountRequired of 20,000 base units of USDC (0x8335…), which at 6 decimals equals $0.02 per request — consistent with the platform's uniform $0.02/request pricing.\n\nThe platform advertises no API keys, no rate limits, and instant access. Payment is handled entirely via the x402 protocol: callers include an X-PAYMENT header with a signed payment authorization, and the server settles on the Base L1 network. The accepted scheme is \"exact\" with a 300-second timeout. No OpenAPI schema, detailed documentation, or example request/response bodies were found in the crawl — the docs, pricing, API, and README pages all rendered only a \"Connect wallet\" prompt with no substantive content.\n\nBecause this endpoint's path suggests health record data (EHR), it may involve regulated or sensitive information. The lack of documentation makes it impossible to verify what data is returned, what input is expected, or whether appropriate privacy/compliance measures are in place. Prospective users should exercise caution.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","ehr-data","no-api-key"],"categories":["health","data"],"synonyms":["electronic health record","EHR API","health data endpoint","medical records API","lowpaymentfee","x402 health API","pay-per-call EHR"],"warnings":["Endpoint path suggests Electronic Health Record data — may involve regulated/sensitive health information with no visible compliance documentation.","No documentation found: /docs, /pricing, /api, and /README all render only a 'Connect wallet' prompt.","This specific endpoint (/api/v1/ehr/22) is not listed among the provider's advertised APIs, raising questions about its intended availability.","No request or response schema available; input format and output structure are unknown."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/22","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/22","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 no documentation, no OpenAPI schema, no example requests or responses, and the EHR endpoint is not even listed on the provider's own landing page. The nature of the data returned is entirely 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'/request':134 '0.02':9,26,124,133 '000':113 '0x8335':118 '20':112 '300':184 '6':121 'EHR API' 'accept':178 'access':147 'advertis':88,138 'ai':93 'among':85 'analyt':92 'api':15,32,55,89,140,204 'appear':66 'appropri':255 'author':167 'base':7,24,61,114,174 'base-network' 'bodi':195 'caller':156 'categori':90 'caution':265 'challeng':107 'collect':46 'connect':212 'consist':127 'content':218 'crawl':200 'data':91,227,246 'decim':122 'detail':190 'doc':202 'document':191,239 'ehr':4,21,73,228 'ehr-data' 'electron':70 'electronic health record' 'endpoint':5,22,36,74,99,221 'entir':151 'equal':123 'exact':181 'exampl':193 'exercis':264 'expect':252 'financ':95 'found':197 'gate':3,20 'handl':150 'header':162 'health':71,225 'health data endpoint' 'imposs':242 'includ':157 'inform':235 'infrastructur':97 'input':250 'instant':146 'involv':231 'key':16,33,141 'l1':175 'lack':237 'land':79 'limit':144 'list':83 'live':101 'lowpaymentfee' 'lowpaymentfee.com':43 'make':240 'maxamountrequir':110 'may':230 'measur':257 'medical records API' 'ml':94 'network':62,176 'no-api-key' 'openapi':188 'page':80,207 'part':40 'path':223 'pay':8,25,52 'pay-per-call EHR' 'pay-per-request':51 'payment':148,161,166 'per':10,27,53,125 'place':260 'platform':44,130,137 'price':135,203 'privacy/compliance':256 'prompt':214 'prospect':261 'protocol':50,155 'provid':77 'public':87 'rate':143 'readm':206 'record':72,226 'regul':232 'render':209 'request':11,28,54,126 'request/response':194 'requir':17,34 'resourc':65 'return':103,248 'schema':189 'scheme':179 'second':185 'sensit':234 'server':170 'settl':56,171 'sign':165 'specif':64 'substant':217 'suggest':224 'though':75 'timeout':186 'uniform':132 'unit':115 'usdc':13,30,58,117 'usdc-settlement' 'user':262 'valid':105 'verifi':244 'via':152 'wallet':213 'web3':96 'whether':254 'x':160 'x-payment':159 'x402':2,19,49,106,154 'x402 health API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':48","prices":[{"id":"19b99d10-4798-461f-a9dd-aba8eaf5a9e3","listingId":"ebb7b84c-b180-4ab4-bd78-c4bcfd13b44d","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/22","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:09.570Z"}],"sources":[{"listingId":"ebb7b84c-b180-4ab4-bd78-c4bcfd13b44d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/22","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:09.570Z","lastSeenAt":"2026-04-22T20:01:53.179Z"}],"details":{"listingId":"ebb7b84c-b180-4ab4-bd78-c4bcfd13b44d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/22 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-signed-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 network","source_url":"https://lowpaymentfee.com/api/v1/ehr/22"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/ehr/22"},{"claim":"The /api/v1/ehr/22 endpoint is not listed among the provider's publicly advertised API categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving electronic health record data for a specific resource (ID 22)","Integrating health data into agent workflows with per-request micropayments","Accessing EHR information without managing API keys or subscriptions"],"bestFor":["Developers needing on-demand EHR data access via crypto micropayments","AI agents that can settle x402 payments on Base","Prototyping health-data integrations without subscription commitments"],"notFor":["Production healthcare applications requiring HIPAA-compliant, audited data pipelines","Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:23.272Z"},"updatedAt":"2026-04-22T20:01:53.179Z"}}