{"id":"e12e2148-fdaf-46f5-b51e-d1b0788fbf1f","shortId":"u9hHcP","kind":"x402","title":"GBP/CHF forex rate via x402 micropayment on Base, $0.02 per request.","tagline":"GBP/CHF forex rate via x402 micropayment on Base, $0.02 per request.","description":"This endpoint provides GBP/CHF foreign exchange rate data, accessible via the x402 payment protocol on the Base network. It is part of a broader suite of APIs offered by lowpaymentfee.com covering finance, analytics, AI/ML, crypto, and utility services — all priced at $0.02 per request paid in USDC.\n\nThe endpoint accepts POST requests and returns JSON. Payment is handled inline via the x402 protocol: callers include an X-PAYMENT header with a signed USDC payment on Base (contract 0x8335…2913). The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. No API keys, rate limits, or upfront commitments are needed — each call is independently paid.\n\nDocumentation on the site 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, and no example payloads available. The endpoint is confirmed live (returns a proper 402 challenge), but the exact request body format and response structure for the GBP/CHF forex data are unknown and must be discovered by the caller.","tags":[],"capabilities":["forex-rate","gbp-chf","x402-payment","usdc-base","micropayment","real-time-data","pay-per-request"],"categories":["finance","forex"],"synonyms":["GBP CHF exchange rate","pound to swiss franc","forex API","currency conversion","FX rate","GBP/CHF price","foreign exchange rate API"],"warnings":["No OpenAPI or schema documentation available — request and response formats are unknown","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no technical content","The specific forex data source and update frequency are not disclosed","The endpoint description is generic ('Premium API Access') and does not describe the forex functionality"],"endpointUrl":"https://lowpaymentfee.com/api/v1/forex/GBPCHF","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/GBPCHF","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 with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The actual data returned is entirely 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'000':109 '0x8335':101 '20':108 '2913':102 '402':181 '6':114 'FX rate' 'GBP CHF exchange rate' 'GBP/CHF price' 'accept':72 'access':31 'addit':157 'ai/ml':56 'amount':105 'analyt':55 'api':49,120,144 'avail':172 'base':8,19,39,99,110 'bodi':187 'broader':46 'call':130 'caller':86,205 'challeng':182 'commit':126 'confirm':176 'connect':152 'contract':100 'cover':53 'crypto':57 'currency conversion' 'data':30,196 'decim':115 'detail':159 'discov':202 'doc':142 'document':134 'endpoint':24,71,174 'equal':117 'exact':185 'exampl':170 'exchang':28 'extrem':139 'financ':54 'foreign':27 'foreign exchange rate API' 'forex':2,13,195 'forex API' 'forex-rate' 'format':188 'gbp-chf' 'gbp/chf':1,12,26,194 'handl':80 'header':92 'includ':87 'independ':132 'inlin':81 'json':77 'key':121 'limit':123 'live':177 'lowpaymentfee.com':52 'max':104 'micropay':6,17 'micropayment' 'must':200 'need':128 'network':40 'offer':50 'openapi':163 'page':147 'paid':67,133 'part':43 'pay-per-request' 'payload':171 'payment':35,78,91,97 'per':10,21,65 'post':73 'pound to swiss franc' 'price':62,143 'prompt':154 'proper':180 'protocol':36,85 'provid':25 'rate':3,14,29,122 'readm':146 'real-time-data' 'render':149 'request':11,22,66,74,186 'request/response':166 'requir':106 'respons':190 'return':76,178 'schema':167 'servic':60 'sign':95 'site':137 'spars':140 'spec':164 'structur':191 'suit':47 'technic':158 'unit':111 'unknown':198 'upfront':125 'usdc':69,96,113 'usdc-base' 'util':59 'via':4,15,32,82 'wallet':153 'x':90 'x-payment':89 'x402':5,16,34,84 'x402-payment'","prices":[{"id":"3712942c-d2d3-46d8-836e-c732485df85b","listingId":"e12e2148-fdaf-46f5-b51e-d1b0788fbf1f","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/GBPCHF","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:46:47.912Z"}],"sources":[{"listingId":"e12e2148-fdaf-46f5-b51e-d1b0788fbf1f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/forex/GBPCHF","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:47.912Z","lastSeenAt":"2026-04-29T13:05:03.133Z"}],"details":{"listingId":"e12e2148-fdaf-46f5-b51e-d1b0788fbf1f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/forex/GBPCHF \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-signed-payment-header>\"","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 base units USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/forex/GBPCHF"},{"claim":"All APIs on the site are 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 is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/forex/GBPCHF"}],"useCases":["Fetching the current GBP/CHF exchange rate for trading or portfolio applications","Integrating real-time forex data into automated financial agents","Pay-per-call currency rate lookups without API key management"],"bestFor":["Agents or apps needing on-demand GBP/CHF rates without subscription commitments","Developers experimenting with x402 micropayment-gated APIs","Low-volume forex data consumers who prefer pay-per-request pricing"],"notFor":["High-frequency trading requiring sub-millisecond latency and bulk rate plans","Users who need comprehensive multi-pair forex feeds in a single call","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:17.566Z"},"updatedAt":"2026-04-29T13:05:03.133Z"}}