{"id":"50b8ec6d-88a4-44c0-8999-5e244a1e0061","shortId":"d5axzm","kind":"x402","title":"x402-gated medical records endpoint on Base, paid per-request in USDC.","tagline":"x402-gated medical records endpoint on Base, paid per-request in USDC.","description":"This endpoint at lowpaymentfee.com serves medical record data behind an x402 paywall. The specific resource `/api/v1/medical/records/13` returns JSON content upon payment. It is part of a broader platform (lowpaymentfee.com) that hosts dozens of x402-gated API endpoints spanning data analytics, AI/ML inference, finance, and utility categories, all settled on the Base network using USDC.\n\nThe x402 challenge confirms the endpoint is live and accepts payments via the \"exact\" scheme on Base. The maximum amount required is 20,000 base units of USDC (0x8335…2913 on Base), which at 6 decimals equals $0.02 per request. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nImportant caveat: this endpoint is labeled as returning medical records. No documentation exists describing the data schema, data source, compliance posture, or whether the data is synthetic, anonymized, or real. The crawl yielded almost no detail beyond the landing page listing and the 402 challenge. Callers should exercise caution, especially given the sensitive nature of medical data.","tags":[],"capabilities":["x402-payment","usdc-base","medical-records","json-response","per-request-billing","no-api-key"],"categories":["data","health"],"synonyms":["medical records API","health data endpoint","x402 medical","USDC pay-per-call","lowpaymentfee medical","Base network API","402 payment medical"],"warnings":["No documentation on what data is returned — response schema is completely unknown.","Endpoint claims to serve 'medical records' but no information on data source, compliance (HIPAA, GDPR), or whether data is real, synthetic, or anonymized.","No OpenAPI spec or example responses available.","The broader platform lists many endpoints but provides no detailed docs for any of them.","Regulated data category (health/medical) with zero compliance disclosures."],"endpointUrl":"https://lowpaymentfee.com/api/v1/medical/records/13","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/medical/records/13","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on the response schema, data source, or what 'medical records' actually contains. No OpenAPI spec, no examples, and the crawl pages beyond the landing page were empty. The medical/health category raises additional compliance concerns with no information 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'0.02':121 '000':107 '0x8335':112 '20':106 '2913':113 '402':193 '402 payment medical' '6':118 'Base network API' 'USDC pay-per-call' 'accept':93 'access':135 'advertis':126 'ai/ml':70 'almost':183 'amount':103 'analyt':69 'anonym':177 'api':65,128 'attach':138 'base':8,22,80,100,108,115 'behind':37 'beyond':186 'broader':55 'caller':136,195 'categori':75 'caution':198 'caveat':151 'challeng':86,194 'complianc':169 'confirm':87 'content':47 'crawl':181 'data':36,68,165,167,174,206 'decim':119 'describ':163 'detail':185 'document':161 'dozen':60 'endpoint':6,20,30,66,89,153 'equal':120 'especi':199 'exact':97 'exercis':197 'exist':162 'financ':72 'gate':3,17,64 'given':200 'header':143 'health data endpoint' 'host':59 'import':150 'infer':71 'instant':134 'json':46 'json-response' 'key':129 'label':155 'land':188 'limit':132 'list':190 'live':91 'lowpaymentfee medical' 'lowpaymentfee.com':32,57 'maximum':102 'medic':4,18,34,158,205 'medical records API' 'medical-records' 'natur':203 'network':81 'no-api-key' 'page':189 'paid':9,23 'part':52 'payment':49,94,142,148 'paywal':40 'per':11,25,122 'per-request':10,24 'per-request-billing' 'platform':56,125 'postur':170 'proof':149 'rate':131 'real':179 'record':5,19,35,159 'request':12,26,123 'requir':104 'resourc':43 'return':45,157 'schema':166 'scheme':98 'sensit':202 'serv':33 'settl':77 'simpli':137 'sourc':168 'span':67 'specif':42 'synthet':176 'unit':109 'upon':48 'usdc':14,28,83,111 'usdc-base' 'use':82 'util':74 'valid':146 'via':95 'whether':172 'x':141 'x-payment':140 'x402':2,16,39,63,85,147 'x402 medical' 'x402-gated':1,15,62 'x402-payment' 'yield':182","prices":[{"id":"124962df-ed5a-4822-9105-f857a4f54fe3","listingId":"50b8ec6d-88a4-44c0-8999-5e244a1e0061","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/medical/records/13","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:24.858Z"}],"sources":[{"listingId":"50b8ec6d-88a4-44c0-8999-5e244a1e0061","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/medical/records/13","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:24.858Z","lastSeenAt":"2026-04-22T01:02:20.798Z"}],"details":{"listingId":"50b8ec6d-88a4-44c0-8999-5e244a1e0061","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/medical/records/13 \\\n  -H \"X-PAYMENT: <x402_payment_proof>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns HTTP 402 with an x402 challenge requiring 20000 base units of USDC on Base network.","source_url":"https://lowpaymentfee.com/api/v1/medical/records/13"},{"claim":"The platform advertises $0.02 per request, no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","source_url":"https://lowpaymentfee.com/api/v1/medical/records/13"}],"useCases":["Retrieving medical record data (record ID 13) via a single paid API call","Demonstrating x402 payment flows against a live endpoint on Base","Integrating pay-per-request health data into agent workflows"],"bestFor":["Developers experimenting with x402 payment protocol on Base","Agents that need on-demand, keyless API access to structured data","Testing micropayment integrations with USDC"],"notFor":["Production healthcare applications requiring HIPAA-compliant, audited data sources","Use cases needing bulk or streaming medical data at scale","Anyone needing documented data provenance or regulatory compliance guarantees"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:03.454Z"},"updatedAt":"2026-04-22T01:02:20.798Z"}}