{"id":"90f89c05-3af8-4d78-a1a8-576b865ed738","shortId":"NYhb7J","kind":"x402","title":"AUD/CAD forex exchange rate via x402 micropayment on Base for $0.02 per request.","tagline":"AUD/CAD forex exchange rate via x402 micropayment on Base for $0.02 per request.","description":"This endpoint provides the AUD/CAD (Australian Dollar to Canadian Dollar) foreign exchange rate through an x402-enabled API hosted at lowpaymentfee.com. Each request costs $0.02 (20,000 base units of USDC on the Base network, where USDC has 6 decimals). No API keys or rate limits are required — payment is handled per-request via the x402 protocol using an exact-payment scheme.\n\nThe provider, lowpaymentfee.com, offers a broad catalog of pay-per-call endpoints spanning finance, AI/ML, data analytics, and utility services, all priced at $0.02 per request. This specific endpoint is a POST-based forex rate lookup for the AUD/CAD currency pair, returning JSON. The x402 challenge was successfully captured, confirming the endpoint is live and accepting payments to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base.\n\nDocumentation beyond the landing page is sparse — the /docs, /pricing, and /README pages all returned only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema, and no example payloads available from the crawl. The endpoint's exact input parameters and response format must be inferred from the URL pattern (currency pair in the path) and the declared mimeType of application/json.","tags":[],"capabilities":["forex-rate","aud-cad","x402-payment","usdc-base","per-request-pricing","no-api-key","json-response"],"categories":["finance","forex"],"synonyms":["AUD CAD exchange rate","Australian Dollar Canadian Dollar rate","forex rate API","currency conversion AUD CAD","FX rate lookup","foreign exchange rate"],"warnings":["No OpenAPI or request/response schema available — input parameters and response format are unknown.","Documentation pages (/docs, /pricing, /README) returned no useful content.","No example responses available to verify data quality or format.","The broader lowpaymentfee.com catalog lists many endpoint categories but the specific forex endpoint's data source is undisclosed."],"endpointUrl":"https://lowpaymentfee.com/api/v1/forex/AUDCAD/rate","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/rate","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.400","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no example payloads, and the docs pages are empty beyond a wallet-connect prompt. The listing is functional but minimally 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'/pricing':169 '/readme':171 '0.02':11,24,52,116 '000':54 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':153 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':157 '20':53 '6':66 'AUD CAD exchange rate' 'Australian Dollar Canadian Dollar rate' 'FX rate lookup' 'accept':149 'addit':182 'address':152 'ai/ml':107 'analyt':109 'api':45,69 'application/json':227 'aud-cad' 'aud/cad':1,14,31,132 'australian':32 'avail':197 'base':9,22,55,61,126,159 'beyond':161 'broad':97 'call':103 'canadian':35 'captur':142 'catalog':98 'challeng':139 'confirm':143 'connect':177 'contract':156 'cost':51 'crawl':200 'currenc':133,217 'currency conversion AUD CAD' 'data':108 'decim':67 'declar':224 'detail':184 'document':160 'dollar':33,36 'enabl':44 'endpoint':28,104,121,145,202 'exact':89,204 'exact-pay':88 'exampl':195 'exchang':3,16,38 'financ':106 'foreign':37 'foreign exchange rate' 'forex':2,15,127 'forex rate API' 'forex-rate' 'format':209 'handl':78 'host':46 'infer':212 'input':205 'json':136 'json-response' 'key':70 'land':163 'limit':73 'live':147 'lookup':129 'lowpaymentfee.com':48,94 'micropay':7,20 'mimetyp':225 'must':210 'network':62 'no-api-key' 'offer':95 'openapi':188 'page':164,172 'pair':134,218 'paramet':206 'path':221 'pattern':216 'pay':101 'pay-per-cal':100 'payload':196 'payment':76,90,150 'per':12,25,80,102,117 'per-request':79 'per-request-pricing' 'post':125 'post-bas':124 'price':114 'prompt':179 'protocol':85 'provid':29,93 'rate':4,17,39,72,128 'request':13,26,50,81,118 'request/response':191 'requir':75 'respons':208 'return':135,174 'schema':192 'scheme':91 'servic':112 'span':105 'spars':166 'spec':189 'specif':120 'success':141 'technic':183 'unit':56 'url':215 'usdc':58,64,155 'usdc-base' 'use':86,154 'util':111 'via':5,18,82 'wallet':178 'x402':6,19,43,84,138 'x402-enabled':42 'x402-payment'","prices":[{"id":"cd9c96c2-d375-490e-8606-99708890747c","listingId":"90f89c05-3af8-4d78-a1a8-576b865ed738","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/rate","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:46:41.343Z"}],"sources":[{"listingId":"90f89c05-3af8-4d78-a1a8-576b865ed738","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/forex/AUDCAD/rate","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:41.343Z","lastSeenAt":"2026-04-29T14:34:10.157Z"}],"details":{"listingId":"90f89c05-3af8-4d78-a1a8-576b865ed738","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/forex/AUDCAD/rate \\\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 HTTP 402 with x402 challenge confirming it is live","source_url":"https://lowpaymentfee.com/api/v1/forex/AUDCAD/rate"},{"claim":"Price is $0.02 per request (maxAmountRequired 20000 base units of USDC with 6 decimals on Base)","source_url":"https://lowpaymentfee.com/api/v1/forex/AUDCAD/rate"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/forex/AUDCAD/rate"},{"claim":"Provider advertises $0.02/request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages return only 'Connect wallet' with no technical content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Fetching real-time AUD/CAD exchange rates for trading bots or portfolio dashboards","Embedding live forex data into financial applications without managing API keys","Agent-driven currency conversion workflows that pay per call via x402"],"bestFor":["Developers needing on-demand AUD/CAD forex rates without subscription commitments","AI agents that can settle micropayments on Base via x402","Applications requiring keyless, pay-per-use forex data"],"notFor":["High-frequency trading requiring sub-millisecond latency and bulk rate plans","Users who need historical forex time-series data (no evidence this endpoint provides it)","Teams without crypto wallets or USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:17.97Z"},"updatedAt":"2026-04-29T14:34:10.157Z"}}