{"id":"e5c17c27-53b1-4eb2-be47-119cb233b33f","shortId":"RhnBtz","kind":"x402","title":"GBP/USD historical forex data via x402 micropayment on Base, $0.02 per request.","tagline":"GBP/USD historical forex data via x402 micropayment on Base, $0.02 per request.","description":"This endpoint provides historical forex data for the GBP/USD currency pair, accessible through the x402 payment protocol on the Base network. Each request costs $0.02 (20,000 base units of USDC with 6 decimals), settled on-chain to the provider's wallet. No API keys or rate limits are required — payment is handled per-request via the X-PAYMENT header.\n\nThe endpoint is part of a broader suite of APIs offered by lowpaymentfee.com spanning data analytics, AI/ML inference, finance, crypto, and utility services, all priced at $0.02 per call. The specific endpoint at `/api/v1/forex/GBPUSD/history` accepts POST requests and returns JSON. However, documentation on the exact request body schema (e.g., date ranges, granularity parameters) and response format is not publicly available — the docs, pricing, and API pages behind the site all appear to require a wallet connection to view.\n\nBecause the crawled documentation is extremely thin (most pages only show \"Connect wallet\"), the precise input parameters and response structure for this forex history endpoint remain unknown. The endpoint is confirmed live via a valid 402 challenge, and the pricing is clear, but prospective users should expect to experiment or connect a wallet to access fuller documentation.","tags":[],"capabilities":["forex-history","gbp-usd","x402-payment","base-network","usdc-settlement","per-request-pricing","json-response"],"categories":["finance","forex"],"synonyms":["GBP USD historical data","pound dollar exchange rate history","forex historical prices","currency pair history API","GBPUSD rate history"],"warnings":["No request body schema documented — input parameters for the forex history endpoint are unknown","No response schema or example available","All documentation pages (docs, pricing, API, README) require wallet connection and returned no useful content","The endpoint description is generic ('Premium API Access') and does not describe forex-specific functionality"],"endpointUrl":"https://lowpaymentfee.com/api/v1/forex/GBPUSD/history","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/GBPUSD/history","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 x402 402 challenge and clear pricing ($0.02/request in USDC on Base). However, there is no OpenAPI schema, no documented request/response format, and all documentation pages require wallet connection, leaving input parameters and output structure entirely 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'0.02':10,22,49,114 '000':51 '20':50 '402':201 '6':57 'GBP USD historical data' 'GBPUSD rate history' 'accept':122 'access':36,220 'ai/ml':104 'analyt':103 'api':69,97,152 'appear':158 'avail':147 'base':9,21,44,52 'base-network' 'behind':154 'bodi':134 'broader':94 'call':116 'chain':62 'challeng':202 'clear':207 'confirm':196 'connect':163,177,216 'cost':48 'crawl':168 'crypto':107 'currenc':34 'currency pair history API' 'data':4,16,30,102 'date':137 'decim':58 'doc':149 'document':129,169,222 'e.g':136 'endpoint':26,89,119,190,194 'exact':132 'expect':212 'experi':214 'extrem':171 'financ':106 'forex':3,15,29,188 'forex historical prices' 'forex-history' 'format':143 'fuller':221 'gbp-usd' 'gbp/usd':1,13,33 'granular':139 'handl':78 'header':87 'histor':2,14,28 'histori':189 'howev':128 'infer':105 'input':181 'json':127 'json-response' 'key':70 'limit':73 'live':197 'lowpaymentfee.com':100 'micropay':7,19 'network':45 'offer':98 'on-chain':60 'page':153,174 'pair':35 'paramet':140,182 'part':91 'payment':40,76,86 'per':11,23,80,115 'per-request':79 'per-request-pricing' 'post':123 'pound dollar exchange rate history' 'precis':180 'price':112,150,205 'prospect':209 'protocol':41 'provid':27,65 'public':146 'rang':138 'rate':72 'remain':191 'request':12,24,47,81,124,133 'requir':75,160 'respons':142,184 'return':126 'schema':135 'servic':110 'settl':59 'show':176 'site':156 'span':101 'specif':118 'structur':185 'suit':95 'thin':172 'unit':53 'unknown':192 'usdc':55 'usdc-settlement' 'user':210 'util':109 'valid':200 'via':5,17,82,198 'view':165 'wallet':67,162,178,218 'x':85 'x-payment':84 'x402':6,18,39 'x402-payment'","prices":[{"id":"1a3879b9-e465-4211-b8e7-d4f2c66dd31d","listingId":"e5c17c27-53b1-4eb2-be47-119cb233b33f","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/GBPUSD/history","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:46:43.789Z"}],"sources":[{"listingId":"e5c17c27-53b1-4eb2-be47-119cb233b33f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/forex/GBPUSD/history","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:43.789Z","lastSeenAt":"2026-04-29T13:34:31.265Z"}],"details":{"listingId":"e5c17c27-53b1-4eb2-be47-119cb233b33f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/forex/GBPUSD/history \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/forex/GBPUSD/history"},{"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 USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/forex/GBPUSD/history"}],"useCases":["Retrieving historical GBP/USD exchange rates for backtesting trading strategies","Building financial dashboards that display pound-to-dollar trends over time","Feeding forex history into ML models for currency forecasting","Programmatic access to GBP/USD data without API key management"],"bestFor":["Developers needing on-demand forex history without subscription commitments","AI agents that can settle x402 micropayments on Base","Applications requiring GBP/USD historical data at low per-call cost"],"notFor":["Users who need real-time streaming forex quotes (this is a history endpoint)","High-volume consumers who would prefer bulk/subscription pricing over per-request payments","Users without a Base-compatible wallet or x402 client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:17.769Z"},"updatedAt":"2026-04-29T13:34:31.265Z"}}