{"id":"30e414ab-6676-433b-acf0-0e6d05e9af53","shortId":"pmXQ4r","kind":"x402","title":"CHF/JPY forex rate via x402 micropayment on Base for $0.02 per request.","tagline":"CHF/JPY forex rate via x402 micropayment on Base for $0.02 per request.","description":"This endpoint provides CHF/JPY (Swiss Franc to Japanese Yen) 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 in USDC on the Base network — no API keys, no rate limits, and no subscriptions required.\n\nThe endpoint accepts HTTP POST requests and returns JSON. Payment is handled inline via the X-PAYMENT header using the x402 \"exact\" scheme, settling in USDC (contract 0x8335…2913) on Base. The max amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02. The payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, and the timeout window is 300 seconds.\n\nDocumentation beyond the landing page is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The endpoint is confirmed live (returns 402 challenge), but the exact shape of the forex data response (bid/ask, mid-rate, timestamp, etc.) is unknown and must be inferred from the endpoint path alone.","tags":[],"capabilities":["forex-rate","chf-jpy","x402-payment","usdc-base","micropayment","pay-per-request","no-api-key"],"categories":["finance","forex"],"synonyms":["CHF JPY exchange rate","Swiss Franc Japanese Yen","forex API","currency conversion","FX rate","foreign exchange rate API","CHFJPY"],"warnings":["No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no content.","No OpenAPI or schema definition found; request body and response format are unknown.","No example requests or responses available; the exact forex data fields are unverified.","The provider hosts many diverse API categories (AI, analytics, finance, utils) all at $0.02 — quality and reliability of each is unverifiable."],"endpointUrl":"https://lowpaymentfee.com/api/v1/forex/CHFJPY","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/CHFJPY","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, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no examples, and all documentation pages are empty beyond a wallet-connect prompt. The actual data returned is entirely 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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/CHFJPY","description":"Premium API 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<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, confirming it is live and accepts USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/forex/CHFJPY"},{"claim":"Price is $0.02 per request (20000 base units USDC, 6 decimals)","source_url":"https://lowpaymentfee.com"},{"claim":"No API keys, no rate limits, instant access advertised","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/forex/CHFJPY"}],"useCases":["Fetching real-time or recent CHF/JPY exchange rates for trading bots or dashboards","Integrating forex data into agent workflows that can pay per-call via x402","Building currency conversion features without managing API key subscriptions"],"bestFor":["Agents or 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