{"id":"667bb93c-6bf3-4cbc-a125-d896acf10721","shortId":"jgUDyZ","kind":"x402","title":"Historical EUR/USD forex data via x402 micropayment on Base, $0.02 per request.","tagline":"Historical EUR/USD forex data via x402 micropayment on Base, $0.02 per request.","description":"This endpoint provides historical forex data for the EUR/USD currency pair. It is part of the lowpaymentfee.com platform, which offers a variety of pay-per-call APIs spanning data analytics, AI/ML, finance, crypto, and utility services. All endpoints on the platform use the x402 payment protocol, settling in USDC on the Base network at $0.02 per request with no API keys, rate limits, or subscriptions required.\n\nThe specific endpoint at `/api/v1/forex/EURUSD/history` accepts POST requests and returns JSON. The x402 challenge confirms it is live, advertising a max amount of 20,000 base units of USDC (0x8335…on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the x402 exact scheme to the provider's wallet address.\n\nDocumentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawl. The endpoint name and path strongly suggest it returns historical OHLC or time-series price data for EUR/USD, but the exact request parameters and response format are unknown.","tags":[],"capabilities":["forex-history","eurusd","x402-payment","usdc-base","pay-per-request","json-response","no-api-key"],"categories":["finance","data"],"synonyms":["EUR/USD historical data","forex history API","currency pair history","EURUSD OHLC","exchange rate history","FX data API","euro dollar history"],"warnings":["No OpenAPI or schema documentation available — request parameters and response format are unknown","All documentation pages (docs, API, pricing, README) return only a 'Connect wallet' prompt with no content","The endpoint path suggests forex history but the exact data format (OHLC, tick, etc.) and supported date ranges are unverified"],"endpointUrl":"https://lowpaymentfee.com/api/v1/forex/EURUSD/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/EURUSD/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 via a valid x402 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documentation beyond a landing page listing, no request/response schema, and no examples. The actual request parameters and response format are entirely unknown, making this effectively a stub 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'0.02':10,22,80,126 '000':116 '0x8335':121 '20':115 '6':130 'EUR/USD historical data' 'EURUSD OHLC' 'FX data API' 'accept':97 'address':145 'advertis':110 'ai/ml':56 'amount':113 'analyt':55 'api':52,85,155 'avail':183 'base':9,21,77,117,123 'call':51 'challeng':105 'confirm':106 'connect':164 'content':170 'crawl':186 'crypto':58 'currenc':34 'currency pair history' 'data':4,16,30,54,203 'decim':131 'doc':154 'document':146 'endpoint':26,63,94,188 'equal':125 'eur/usd':2,14,33,205 'euro dollar history' 'eurusd' 'exact':138,208 'exampl':182 'exchange rate history' 'extrem':151 'financ':57 'forex':3,15,29 'forex history API' 'forex-history' 'format':213 'given':127 'histor':1,13,28,196 'json':102 'json-response' 'key':86 'limit':88 'live':109 'lowpaymentfee.com':41 'made':134 'max':112 'micropay':7,19 'name':189 'network':78 'no-api-key' 'offer':44 'ohlc':197 'openapi':174 'page':159 'pair':35 'paramet':210 'part':38 'path':191 'pay':49 'pay-per-cal':48 'pay-per-request' 'payment':70,132 'per':11,23,50,81 'platform':42,66 'post':98 'price':156,202 'prompt':166 'protocol':71 'provid':27,142 'rate':87 'readm':158 'render':161 'request':12,24,82,99,209 'request/response':177 'requir':91 'respons':212 'return':101,195 'schema':178 'scheme':139 'seri':201 'servic':61 'settl':72 'site':149 'span':53 'spars':152 'spec':175 'specif':93 'strong':192 'subscript':90 'suggest':193 'time':200 'time-seri':199 'unit':118 'unknown':215 'usag':181 'usdc':74,120,128 'usdc-base' 'use':67 'util':60 'varieti':46 'via':5,17,135 'wallet':144,165 'x402':6,18,69,104,137 'x402-payment'","prices":[{"id":"72d6f188-26c1-4f6e-b003-f63ce011307c","listingId":"667bb93c-6bf3-4cbc-a125-d896acf10721","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/EURUSD/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":"2026-04-18T18:46:35.989Z"}],"sources":[{"listingId":"667bb93c-6bf3-4cbc-a125-d896acf10721","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/forex/EURUSD/history","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:35.989Z","lastSeenAt":"2026-04-28T14:34:58.421Z"}],"details":{"listingId":"667bb93c-6bf3-4cbc-a125-d896acf10721","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/forex/EURUSD/history \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\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/EURUSD/history"},{"claim":"Platform pricing is $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/EURUSD/history"}],"useCases":["Retrieving historical EUR/USD exchange rate data for backtesting trading strategies","Feeding forex history into analytics dashboards or financial models","Programmatic access to EUR/USD price history without API key management","Agent-driven forex data retrieval with automatic micropayment settlement"],"bestFor":["Developers needing quick, keyless access to EUR/USD historical data","AI agents that can settle x402 payments on Base","Low-volume or sporadic forex data consumers who prefer pay-per-call pricing"],"notFor":["High-frequency trading requiring sub-second latency and bulk data","Users who need comprehensive multi-pair forex coverage from a single endpoint","Anyone unable to settle USDC payments on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:18.192Z"},"updatedAt":"2026-04-28T14:34:58.421Z"}}