{"id":"4d769f43-7e9c-474b-b76c-99e7261ceb2e","shortId":"Y4QKP2","kind":"x402","title":"AUD/CAD forex rate via x402 micropayment on Base, $0.02 per request.","tagline":"AUD/CAD forex rate via x402 micropayment on Base, $0.02 per request.","description":"This endpoint provides AUD/CAD foreign exchange rate data, accessible through the x402 payment protocol. It is part of a broader suite of APIs hosted at lowpaymentfee.com covering finance, analytics, AI/ML, crypto, and utility services. Each request costs $0.02 (20,000 base units of USDC on the Base network, where USDC has 6 decimals). No API keys or accounts are required — callers pay per request via an on-chain USDC micropayment.\n\nThe endpoint accepts POST requests and returns JSON. The x402 challenge confirms the endpoint is live, advertising version 1 of the protocol with an \"exact\" payment scheme. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on the Base L2 network, with a maximum timeout of 300 seconds.\n\nDocumentation is extremely sparse — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no example request/response payloads, and no description of what fields the forex endpoint returns. The specific data source, update frequency, and response format are unknown.","tags":[],"capabilities":["forex-rate","aud-cad","x402-payment","usdc-base","per-request-micropayment","json-response","no-api-key"],"categories":["finance","forex"],"synonyms":["AUD CAD exchange rate","Australian dollar Canadian dollar","forex API","currency pair rate","FX rate lookup","foreign exchange data"],"warnings":["No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no content.","No OpenAPI or output schema provided; response format for the forex endpoint is unknown.","Data source and update frequency for AUD/CAD rates are not disclosed.","The site hosts many diverse API categories (AI, analytics, crypto, utils) all at $0.02 — quality and reliability of each is unverified."],"endpointUrl":"https://lowpaymentfee.com/api/v1/forex/AUDCAD","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/forex/AUDCAD","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge confirms the endpoint is live and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented request/response format, no examples, and all documentation pages return only a wallet-connect prompt. The actual data returned is entirely 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'000':62 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':126 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':130 '1':112 '20':61 '300':141 '6':74 'AUD CAD exchange rate' 'Australian dollar Canadian dollar' 'FX rate lookup' 'accept':96 'access':31 'account':80 'address':125 'advertis':110 'ai/ml':52 'analyt':51 'api':45,77,151 'aud-cad' 'aud/cad':1,12,26 'base':8,19,63,69,133 'broader':42 'caller':83 'chain':91 'challeng':104 'confirm':105 'connect':157 'content':163 'contract':129 'cost':59 'cover':49 'crypto':53 'currency pair rate' 'data':30,185 'decim':75 'descript':175 'doc':148 'document':143 'endpoint':24,95,107,181 'exact':118 'exampl':170 'exchang':28 'extrem':145 'field':178 'financ':50 'foreign':27 'foreign exchange data' 'forex':2,13,180 'forex API' 'forex-rate' 'format':191 'frequenc':188 'host':46 'json':101 'json-response' 'key':78 'l2':134 'live':109 'lowpaymentfee.com':48 'maximum':138 'micropay':6,17,93 'network':70,135 'no-api-key' 'on-chain':89 'openapi':167 'page':152 'part':39 'pay':84 'payload':172 'payment':35,119,121 'per':10,21,85 'per-request-micropayment' 'post':97 'price':149 'prompt':159 'protocol':36,115 'provid':25 'rate':3,14,29 'render':154 'request':11,22,58,86,98 'request/response':171 'requir':82 'respons':190 'return':100,182 'schema':168 'scheme':120 'second':142 'sent':123 'servic':56 'sourc':186 'spars':146 'specif':184 'suit':43 'timeout':139 'unit':64 'unknown':193 'updat':187 'usdc':66,72,92,128 'usdc-base' 'use':127 'util':55 'version':111 'via':4,15,87 'wallet':158 'x402':5,16,34,103 'x402-payment'","prices":[{"id":"bf8b838e-ca47-4554-b590-91ad2ba47462","listingId":"4d769f43-7e9c-474b-b76c-99e7261ceb2e","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/forex/AUDCAD","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:46:22.922Z"}],"sources":[{"listingId":"4d769f43-7e9c-474b-b76c-99e7261ceb2e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/forex/AUDCAD","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:22.922Z","lastSeenAt":"2026-04-29T15:05:02.407Z"}],"details":{"listingId":"4d769f43-7e9c-474b-b76c-99e7261ceb2e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/forex/AUDCAD \\\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":"Endpoint returns 402 with x402 challenge advertising USDC on Base at 20000 base units ($0.02)","source_url":"https://lowpaymentfee.com/api/v1/forex/AUDCAD"},{"claim":"Site advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/forex/AUDCAD"}],"useCases":["Fetching the current AUD/CAD exchange rate for trading or analytics applications","Integrating real-time forex data into an agent workflow without managing API keys","Paying per-call for currency data to avoid subscription commitments"],"bestFor":["Agents or bots that need on-demand AUD/CAD rates without signup","Low-volume forex data consumers who prefer pay-per-use pricing","x402-compatible wallets and agent frameworks on Base"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users who need historical forex time-series data (no evidence this is supported)","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:18.797Z"},"updatedAt":"2026-04-29T15:05:02.407Z"}}