{"id":"bb707156-021d-42b0-ab2b-84ec35a84a2f","shortId":"LJNtZ8","kind":"x402","title":"x402-gated medical records endpoint on Base, pay-per-request with USDC.","tagline":"x402-gated medical records endpoint on Base, pay-per-request with USDC.","description":"This endpoint at lowpaymentfee.com serves medical record data behind an x402 payment wall. The specific resource `/api/v1/medical/records/17` returns JSON content upon payment of up to $0.02 in USDC on the Base network. It uses the x402 \"exact\" payment scheme, meaning the caller must attach a valid X-PAYMENT header with a Base USDC transaction to access the resource.\n\nThe provider's landing page advertises a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all priced at $0.02 per request. This particular endpoint falls under a \"medical/records\" path that is not explicitly listed on the homepage catalog, so its exact data contents and schema are unknown. The endpoint accepts POST requests and returns `application/json`.\n\nPayment settles on Base (Ethereum L2) using USDC at contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`. The maximum amount required is 20,000 base units, which at 6 decimals equals $0.02. No API keys or rate limits are advertised. The x402 challenge was successfully captured (HTTP 402), confirming the endpoint is live.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","medical-records","json-response","no-api-key"],"categories":["data","health"],"synonyms":["medical records API","health data endpoint","x402 medical","pay-per-call medical data","USDC API","Base network API","lowpaymentfee"],"warnings":["Endpoint path /api/v1/medical/records/17 is not listed on the provider's public API catalog — its data contents are unknown.","Medical/health data category: no HIPAA compliance, data provenance, or regulatory information is provided.","No request body schema or response schema available — callers cannot know what to send or what to expect.","No documentation pages were accessible (pricing, README, and /api pages only showed 'Connect wallet').","The nature and authenticity of the 'medical records' data is entirely unverified."],"endpointUrl":"https://lowpaymentfee.com/api/v1/medical/records/17","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/17","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation for this specific medical records endpoint — no request/response schema, no description of what data is returned, and the endpoint path is not listed on the provider's homepage catalog. The medical/health data category raises regulatory concerns without any compliance 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'0.02':54,115,177 '000':169 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':162 '20':168 '402':193 '6':174 'Base network API' 'USDC API' 'accept':146 'access':85 'advertis':93,185 'ai/ml':106 'amount':165 'analyt':105 'api':102,179 'application/json':151 'attach':72 'base':8,22,59,81,155,170 'behind':37 'broad':95 'call':101 'caller':70 'captur':191 'catalog':96,134 'challeng':188 'confirm':194 'content':48,139 'contract':161 'data':36,104,138 'decim':175 'endpoint':6,20,30,120,145,196 'equal':176 'ethereum':156 'exact':65,137 'explicit':129 'fall':121 'finance/web3':108 'gate':3,17 'header':78 'health data endpoint' 'homepag':133 'http':192 'infer':107 'infrastructur':110 'json':47 'json-response' 'key':180 'l2':157 'land':91 'limit':183 'list':130 'live':198 'lowpaymentfee' 'lowpaymentfee.com':32 'maximum':164 'mean':68 'medic':4,18,34 'medical records API' 'medical-records' 'medical/records':124 'must':71 'network':60 'no-api-key' 'page':92 'particular':119 'path':125 'pay':10,24,99 'pay-per-cal':98 'pay-per-call medical data' 'pay-per-request':9,23 'payment':40,50,66,77,152 'per':11,25,100,116 'post':147 'price':113 'provid':89 'rate':182 'record':5,19,35 'request':12,26,117,148 'requir':166 'resourc':44,87 'return':46,150 'schema':141 'scheme':67 'serv':33 'settl':153 'span':103 'specif':43 'success':190 'transact':83 'unit':171 'unknown':143 'upon':49 'usdc':14,28,56,82,159 'usdc-base' 'use':62,158 'util':111 'valid':74 'wall':41 'x':76 'x-payment':75 'x402':2,16,39,64,187 'x402 medical' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"5582da9d-0d95-4e1a-8f7d-3cdbaae53300","listingId":"bb707156-021d-42b0-ab2b-84ec35a84a2f","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/17","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:25.057Z"}],"sources":[{"listingId":"bb707156-021d-42b0-ab2b-84ec35a84a2f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/medical/records/17","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:25.057Z","lastSeenAt":"2026-04-22T01:02:21.059Z"}],"details":{"listingId":"bb707156-021d-42b0-ab2b-84ec35a84a2f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/medical/records/17 \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\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 up to 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/medical/records/17"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/medical/records/17"},{"claim":"Provider advertises $0.02 per request, no API keys, no rate limits across all endpoints","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving medical record data on-demand with per-request USDC payment","Integrating health data into agent workflows without API key management","Programmatic access to structured medical information via x402 protocol"],"bestFor":["Agents or applications needing on-demand medical record lookups","Developers exploring x402 pay-per-call patterns on Base","Use cases requiring keyless, pay-as-you-go API access"],"notFor":["Production healthcare applications requiring HIPAA-compliant, audited data sources","Bulk data retrieval where per-request pricing is inefficient","Users without Base USDC wallets"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:03.231Z"},"updatedAt":"2026-04-22T01:02:21.059Z"}}