{"id":"6ebbef28-7fdd-4887-bfe8-423735404428","shortId":"JREgjc","kind":"x402","title":"USD/CAD forex rate via x402 micropayment on Base for $0.02 per request","tagline":"USD/CAD forex rate via x402 micropayment on Base for $0.02 per request","description":"This endpoint provides the USD/CAD foreign exchange rate through an x402-protocol pay-per-call API hosted at lowpaymentfee.com. Each request costs $0.02 (20,000 base units of USDC on the Base network, where USDC uses 6 decimals). The endpoint accepts POST requests and returns JSON.\n\nThe provider, lowpaymentfee.com, offers a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all priced at $0.02 per call. The x402 payment flow means no API keys or accounts are needed; callers attach an X-PAYMENT header with a signed USDC payment on Base. The 402 challenge confirms the endpoint is live and specifies the exact payment parameters including the payTo address and asset contract (USDC on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913).\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no example payloads available. The endpoint name and path strongly suggest it returns a USD to CAD exchange rate, but the exact response format is unknown.","tags":[],"capabilities":["forex-rate","usd-cad","x402-payment","usdc-base","pay-per-request","micropayment","no-api-key"],"categories":["finance","forex"],"synonyms":["USD CAD exchange rate","dollar to Canadian dollar","forex API","currency conversion","FX rate","USDCAD rate","foreign exchange"],"warnings":["No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no content","No OpenAPI or request/response schema provided; response format is unknown","No examples of successful responses available","Provider offers many endpoints across diverse categories; quality and reliability of each is unverified"],"endpointUrl":"https://lowpaymentfee.com/api/v1/forex/USDCAD","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/USDCAD","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The docs pages are empty. The listing is essentially a stub with only the x402 challenge and homepage catalog to go 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'/docs':158 '/pricing':159 '/readme':162 '0.02':10,22,49,99 '000':51 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':152 '20':50 '402':129 '6':63 'FX rate' 'USD CAD exchange rate' 'USDCAD rate' 'accept':67 'account':111 'address':145 'ai/ml':89 'analyt':88 'api':42,85,108 'asset':147 'attach':115 'avail':187 'base':8,20,52,58,127,151 'broad':78 'cad':200 'call':41,101 'caller':114 'catalog':79 'challeng':130 'confirm':131 'connect':168 'content':174 'contract':148 'cost':48 'crypto':92 'currency conversion' 'data':87 'decim':64 'document':153 'dollar to Canadian dollar' 'endpoint':26,66,133,189 'exact':139,205 'exampl':185 'exchang':31,201 'extrem':155 'financ':91 'flow':105 'foreign':30 'foreign exchange' 'forex':2,14 'forex API' 'forex-rate' 'format':207 'header':120 'host':43 'includ':142 'infer':90 'json':72 'key':109 'live':135 'lowpaymentfee.com':45,75 'mean':106 'micropay':6,18 'micropayment' 'name':190 'need':113 'network':59 'no-api-key' 'offer':76 'openapi':178 'page':163 'paramet':141 'path':192 'pay':39,82 'pay-per-cal':38 'pay-per-request':81 'payload':186 'payment':104,119,125,140 'payto':144 'per':11,23,40,83,100 'post':68 'price':97 'prompt':170 'protocol':37 'provid':27,74 'rate':3,15,32,202 'render':165 'request':12,24,47,69,84 'request/response':181 'respons':206 'return':71,196 'schema':182 'servic':95 'sign':123 'span':86 'spars':156 'spec':179 'specifi':137 'strong':193 'suggest':194 'unit':53 'unknown':209 'usd':198 'usd-cad' 'usd/cad':1,13,29 'usdc':55,61,124,149 'usdc-base' 'use':62 'util':94 'via':4,16 'wallet':169 'x':118 'x-payment':117 'x402':5,17,36,103 'x402-payment' 'x402-protocol':35","prices":[{"id":"17074579-4622-4e6c-a78b-c581da9c5b9e","listingId":"6ebbef28-7fdd-4887-bfe8-423735404428","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/USDCAD","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:46:51.530Z"}],"sources":[{"listingId":"6ebbef28-7fdd-4887-bfe8-423735404428","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/forex/USDCAD","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:51.530Z","lastSeenAt":"2026-04-29T13:05:03.264Z"}],"details":{"listingId":"6ebbef28-7fdd-4887-bfe8-423735404428","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/forex/USDCAD \\\n  -H \"X-PAYMENT: <x402-signed-payment>\" \\\n  -H \"Content-Type: application/json\"","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 specifying USDC on Base, maxAmountRequired 20000","source_url":"https://lowpaymentfee.com/api/v1/forex/USDCAD"},{"claim":"All APIs priced at $0.02 per request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/forex/USDCAD"}],"useCases":["Fetching the current USD/CAD exchange rate for financial applications","Integrating real-time forex data into trading bots or dashboards","Currency conversion calculations in payment or invoicing systems"],"bestFor":["Agents needing on-demand USD/CAD rates without API key management","Micropayment-friendly forex lookups on Base network","Lightweight, single-call currency rate checks"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Bulk historical forex data retrieval","Users who cannot transact in USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:17.431Z"},"updatedAt":"2026-04-29T13:05:03.264Z"}}