{"id":"bc8c0586-adf0-4653-b457-9708c15a1213","shortId":"tNznst","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 lowpaymentfee.com provides access to an Electronic Health Record (EHR) resource via the x402 payment protocol. The specific path `/api/v1/ehr/11` suggests retrieval of a particular EHR record (ID 11). Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals). The endpoint accepts POST requests and returns application/json.\n\nThe provider, lowpaymentfee.com, hosts a broad catalog of x402-gated APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all priced uniformly at $0.02 per call. The platform advertises no API keys, no rate limits, and instant access; callers simply attach an x402 payment header to each request. However, the specific `/api/v1/ehr/11` path is not listed on the provider's public landing page among the advertised API categories, and no documentation, request schema, or response schema is available for this endpoint. The docs, pricing, and README pages all resolve to a minimal \"Connect wallet\" prompt with no further detail.\n\nBecause there is no published documentation describing what data this EHR endpoint returns, what POST body it expects, or what the response structure looks like, callers should treat this as an exploratory endpoint. The EHR label raises questions about whether it handles real protected health information (PHI), which would implicate HIPAA and similar regulations — but there is no evidence either way in the crawled material.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","ehr-data","per-request-pricing","no-api-key","json-response"],"categories":["health","data"],"synonyms":["electronic health record API","EHR API","health data endpoint","x402 health API","pay-per-call EHR","lowpaymentfee EHR","Base USDC API"],"warnings":["This EHR endpoint is not listed among the provider's publicly advertised APIs — its purpose and data source are unknown.","No request or response schema is documented; callers must discover the interface experimentally.","The 'EHR' label implies health data which may be subject to HIPAA or other health data regulations — no compliance information is provided.","Documentation pages (/docs, /pricing, /README) contain no usable content beyond a 'Connect wallet' prompt."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/11","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/11","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), but there is zero documentation for this specific EHR endpoint — no request schema, no response schema, no examples, and the path isn't even listed on the provider's own landing page. The docs/pricing/README pages are all blank beyond a wallet-connect prompt. The EHR category also raises regulatory concerns with no clarification 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'0.02':9,26,89,130 '000':84 '0x8335':76 '11':65 '20':83 '2913':77 '6':94 'Base USDC API' 'EHR API' 'accept':98 'access':40,144 'advertis':135,172 'ai/ml':119 'among':170 'analyt':118 'api':15,32,115,137,173 'application/json':103 'attach':147 'avail':184 'base':7,24,71,85 'base-network' 'bodi':221 'broad':109 'call':132 'caller':145,231 'catalog':110 'categori':174 'connect':199 'contract':75 'cost':81 'crawl':269 'crypto':122 'data':117,214 'decim':95 'describ':212 'detail':205 'doc':189 'document':177,211 'ehr':4,21,46,62,216,240 'ehr-data' 'either':265 'electron':43 'electronic health record API' 'endpoint':5,22,36,97,187,217,238 'equal':88 'evid':264 'expect':223 'exploratori':237 'financ':121 'gate':3,20,114 'handl':247 'header':151 'health':44,250 'health data endpoint' 'hipaa':256 'host':107 'howev':155 'id':64 'implic':255 'infer':120 'inform':251 'instant':143 'json-response' 'key':16,33,138 'label':241 'land':168 'like':230 'limit':141 'list':162 'look':229 'lowpaymentfee EHR' 'lowpaymentfee.com':38,106 'materi':270 'maximum':80 'minim':198 'network':72 'no-api-key' 'page':169,193 'particular':61 'path':55,159 'pay':8,25 'pay-per-call EHR' 'payment':51,66,150 'per':10,27,90,131 'per-request-pricing' 'phi':252 'platform':134 'post':99,220 'price':127,190 'prompt':201 'protect':249 'protocol':52 'provid':39,105,165 'public':167 'publish':210 'question':243 'rais':242 'rate':140 'readm':192 'real':248 'record':45,63 'regul':259 'request':11,28,91,100,154,178 'requir':17,34 'resolv':195 'resourc':47 'respons':181,227 'retriev':58 'return':102,218 'schema':179,182 'servic':125 'settl':68 'similar':258 'simpli':146 'span':116 'specif':54,157 'structur':228 'suggest':57 'treat':233 'uniform':128 'unit':86 'usdc':13,30,74,92 'usdc-settlement' 'use':73,93 'util':124 'via':48 'wallet':200 'way':266 'whether':245 'would':254 'x402':2,19,50,113,149 'x402 health API' 'x402-gated':1,18,112 'x402-payment'","prices":[{"id":"4d82ec06-a0ee-4d4d-9a7e-c18363cb0bbc","listingId":"bc8c0586-adf0-4653-b457-9708c15a1213","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/11","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:09.726Z"}],"sources":[{"listingId":"bc8c0586-adf0-4653-b457-9708c15a1213","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/11","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:09.726Z","lastSeenAt":"2026-04-22T18:32:56.187Z"}],"details":{"listingId":"bc8c0586-adf0-4653-b457-9708c15a1213","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/11 \\\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 402 challenge requesting 20,000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/ehr/11"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/ehr/11"},{"claim":"The provider advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The /api/v1/ehr/11 path is not listed among the provider's publicly advertised API endpoints","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving electronic health record data for a specific record ID","Integrating EHR lookups into agent workflows with per-call crypto payments","Exploring x402-gated health data endpoints without pre-registration"],"bestFor":["Developers experimenting with x402 payment-gated APIs","Agents that need on-demand EHR data access without API key management","Prototyping pay-per-use health data integrations on Base"],"notFor":["Production healthcare applications requiring HIPAA-compliant, audited data pipelines","Use cases needing bulk or batch EHR retrieval at scale","Anyone needing detailed documentation or guaranteed SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:23.079Z"},"updatedAt":"2026-04-22T18:32:56.187Z"}}