{"id":"fc248a6e-2cd7-4be3-a9af-6711e049ac4a","shortId":"Y59CGz","kind":"x402","title":"EUR/CHF forex rate via x402 micropayment on Base for $0.02 per request.","tagline":"EUR/CHF forex rate via x402 micropayment on Base for $0.02 per request.","description":"This endpoint provides EUR/CHF foreign exchange rate data, accessible through the x402 payment protocol on the Base network. Each request costs $0.02 (20,000 base units of USDC with 6 decimals) and requires no API keys, accounts, or rate limits — payment is handled per-call via an X-PAYMENT header settled in USDC on Base.\n\nThe endpoint is part of a broader suite of APIs offered at lowpaymentfee.com spanning finance, analytics, AI/ML, crypto, and utility categories, all priced uniformly at $0.02 per request. The forex endpoint specifically serves the EUR/CHF currency pair. The response MIME type is application/json, and the endpoint accepts POST requests.\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 example request/response payloads, and no description of the response schema. The endpoint is confirmed live (returns a valid x402 402 challenge), but the lack of documentation means the exact response format must be discovered by making a paid request.","tags":[],"capabilities":["forex-rate","eur-chf","x402-payment","usdc-base","per-request-pricing","no-api-key","json-response"],"categories":["finance","forex"],"synonyms":["EUR/CHF exchange rate","euro swiss franc rate","forex API","currency pair rate","FX rate endpoint","EUR CHF price"],"warnings":["No OpenAPI or schema documentation available — response format is unknown","All doc/pricing/README pages render only 'Connect wallet' with no content","No example request or response payloads available; exact data fields must be discovered empirically","Provider offers many endpoints across diverse categories (AI, analytics, finance, utils) all at the same price — quality/depth of each is unverified"],"endpointUrl":"https://lowpaymentfee.com/api/v1/forex/EURCHF","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/EURCHF","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 x402 402 challenge 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 all documentation pages beyond the landing page are empty. This is effectively a stub listing with verified liveness but minimal usable 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'/docs':140 '/pricing':141 '/readme':144 '0.02':10,22,46,107 '000':48 '20':47 '402':183 '6':54 'EUR CHF price' 'EUR/CHF exchange rate' 'FX rate endpoint' 'accept':128 'access':33 'account':61 'addit':155 'ai/ml':98 'analyt':97 'api':59,91 'application/json':124 'base':8,20,41,49,81 'beyond':132 'broader':88 'call':70 'categori':102 'challeng':184 'confirm':177 'connect':150 'cost':45 'crypto':99 'currenc':117 'currency pair rate' 'data':32 'decim':55 'descript':169 'detail':157 'discov':197 'document':131,189 'endpoint':26,83,112,127,175 'eur-chf' 'eur/chf':1,13,28,116 'euro swiss franc rate' 'exact':192 'exampl':164 'exchang':30 'extrem':137 'financ':96 'foreign':29 'forex':2,14,111 'forex API' 'forex-rate' 'format':194 'handl':67 'header':76 'json-response' 'key':60 'lack':187 'land':134 'limit':64 'live':178 'lowpaymentfee.com':94 'make':199 'mean':190 'micropay':6,18 'mime':121 'must':195 'network':42 'no-api-key' 'offer':92 'openapi':161 'page':135,145 'paid':201 'pair':118 'part':85 'payload':166 'payment':37,65,75 'per':11,23,69,108 'per-cal':68 'per-request-pricing' 'post':129 'price':104 'prompt':152 'protocol':38 'provid':27 'rate':3,15,31,63 'render':147 'request':12,24,44,109,130,202 'request/response':165 'requir':57 'respons':120,172,193 'return':179 'schema':173 'serv':114 'settl':77 'span':95 'spars':138 'spec':162 'specif':113 'suit':89 'technic':156 'type':122 'uniform':105 'unit':50 'usdc':52,79 'usdc-base' 'util':101 'valid':181 'via':4,16,71 'wallet':151 'x':74 'x-payment':73 'x402':5,17,36,182 'x402-payment'","prices":[{"id":"3c0de2f8-5a6e-479f-ad89-c14804ec178e","listingId":"fc248a6e-2cd7-4be3-a9af-6711e049ac4a","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/EURCHF","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:46:40.735Z"}],"sources":[{"listingId":"fc248a6e-2cd7-4be3-a9af-6711e049ac4a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/forex/EURCHF","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:40.735Z","lastSeenAt":"2026-04-29T14:34:10.128Z"}],"details":{"listingId":"fc248a6e-2cd7-4be3-a9af-6711e049ac4a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/forex/EURCHF \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\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 a valid x402 402 challenge with maxAmountRequired of 20000 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/forex/EURCHF"},{"claim":"All APIs priced at $0.02 per request with no API keys, no rate limits, and 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/EURCHF"}],"useCases":["Fetching the current EUR/CHF exchange rate for trading bots or financial dashboards","Integrating real-time forex data into automated agent workflows without API key management","Pay-per-use currency conversion reference for cross-border payment applications"],"bestFor":["Agents or apps needing on-demand EUR/CHF rates without subscription commitments","Developers who prefer crypto-native per-call payment over traditional API key billing","Low-volume or sporadic forex data consumers who want no minimums"],"notFor":["High-frequency trading requiring sub-millisecond latency or bulk historical data","Users who need comprehensive multi-pair forex coverage from a single documented API","Anyone unable to transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:18.01Z"},"updatedAt":"2026-04-29T14:34:10.128Z"}}