{"id":"4662613e-b6b2-4703-be75-0d83d0aa6bbd","shortId":"HYAa5M","kind":"x402","title":"GBP/JPY forex rate via x402 micropayment on Base, $0.02 per request.","tagline":"GBP/JPY forex rate via x402 micropayment on Base, $0.02 per request.","description":"This endpoint provides GBP/JPY foreign exchange rate data, accessible via 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 by lowpaymentfee.com, which spans data analytics, AI/ML inference, finance/crypto market data, and utility services, all priced uniformly at $0.02 per request. The specific /api/v1/forex/GBPJPY endpoint is not listed on the provider's landing page (which shows /api/v1/finance/rates and /api/v1/finance/prices instead), but it responds with a valid x402 challenge, indicating it is live and operational.\n\nDocumentation is extremely sparse — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI schema, no example request/response payloads, and no description of the response format beyond the mimeType of application/json. The endpoint accepts POST requests. Given the forex pair naming convention, the response likely contains bid/ask or mid-market rate data for GBP/JPY, but this is inferred rather than documented.","tags":[],"capabilities":["forex-rates","gbp-jpy","x402-payment","usdc-base","per-call-micropayment","real-time-data","no-api-key"],"categories":["finance","forex"],"synonyms":["GBP JPY exchange rate","pound yen rate","forex API","currency pair rate","FX rate GBPJPY","British pound Japanese yen"],"warnings":["No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no technical content.","The /api/v1/forex/GBPJPY endpoint is not listed on the provider's homepage; its existence is confirmed only by the live 402 challenge.","No OpenAPI schema or response examples are available; the response structure is unknown.","No information on data source, update frequency, or accuracy of the forex rates."],"endpointUrl":"https://lowpaymentfee.com/api/v1/forex/GBPJPY","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/GBPJPY","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (valid x402 402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no example request or response payloads, and the specific forex endpoint is not even listed on the provider's landing page. The response format is entirely 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'/api/v1/finance/rates':127 '/api/v1/forex/gbpjpy':114 '0.02':9,20,44,109 '000':46 '20':45 '6':52 'British pound Japanese yen' 'FX rate GBPJPY' 'GBP JPY exchange rate' 'accept':190 'access':31 'account':59 'ai/ml':97 'analyt':96 'api':57,89,153 'application/json':187 'base':8,19,39,47,79 'beyond':183 'bid/ask':203 'broader':86 'call':68 'challeng':138 'connect':159 'contain':202 'convent':198 'cost':43 'currency pair rate' 'data':30,95,101,209 'decim':53 'descript':178 'detail':166 'doc':150 'document':145,218 'endpoint':24,81,115,189 'exampl':173 'exchang':28 'extrem':147 'finance/crypto':99 'foreign':27 'forex':2,13,195 'forex API' 'forex-rates' 'format':182 'gbp-jpy' 'gbp/jpy':1,12,26,211 'given':193 'handl':65 'header':74 'indic':139 'infer':98,215 'instead':130 'key':58 'land':123 'like':201 'limit':62 'list':118 'live':142 'lowpaymentfee.com':92 'market':100,207 'micropay':6,17 'mid':206 'mid-market':205 'mimetyp':185 'name':197 'network':40 'no-api-key' 'offer':90 'openapi':170 'oper':144 'page':124,154 'pair':196 'part':83 'payload':175 'payment':35,63,73 'per':10,21,67,110 'per-cal':66 'per-call-micropayment' 'post':191 'pound yen rate' 'price':106,151 'prompt':161 'protocol':36 'provid':25,121 'rate':3,14,29,61,208 'rather':216 'real-time-data' 'render':156 'request':11,22,42,111,192 'request/response':174 'requir':55 'respond':133 'respons':181,200 'schema':171 'servic':104 'settl':75 'show':126 'span':94 'spars':148 'specif':113 'suit':87 'technic':165 'uniform':107 'unit':48 'usdc':50,77 'usdc-base' 'util':103 'valid':136 'via':4,15,32,69 'wallet':160 'x':72 'x-payment':71 'x402':5,16,34,137 'x402-payment'","prices":[{"id":"a3c56d62-1fef-487d-aab6-f24bad272bd5","listingId":"4662613e-b6b2-4703-be75-0d83d0aa6bbd","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/GBPJPY","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:46:56.317Z"}],"sources":[{"listingId":"4662613e-b6b2-4703-be75-0d83d0aa6bbd","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/forex/GBPJPY","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:56.317Z","lastSeenAt":"2026-04-29T11:34:02.554Z"}],"details":{"listingId":"4662613e-b6b2-4703-be75-0d83d0aa6bbd","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/forex/GBPJPY \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/forex/GBPJPY"},{"claim":"All APIs on the platform 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":"The provider lists finance endpoints including /api/v1/finance/prices and /api/v1/finance/rates but does not list /api/v1/forex/GBPJPY specifically","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching real-time or near-real-time GBP/JPY exchange rates for trading bots","Integrating forex data into financial dashboards without managing API keys","Agent-driven currency conversion lookups paid per call via x402"],"bestFor":["Developers needing simple pay-per-call forex data without subscriptions","AI agents that can settle x402 micropayments on Base","Low-volume or sporadic forex rate lookups where $0.02/call is cost-effective"],"notFor":["High-frequency trading requiring sub-millisecond latency and bulk pricing","Users who need historical forex time-series data (no evidence this is supported)","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:17.183Z"},"updatedAt":"2026-04-29T11:34:02.554Z"}}