{"id":"182dd004-9263-4dd4-9c33-e98bf14df300","shortId":"qY4zGa","kind":"x402","title":"Historical EUR/AUD forex data via x402 micropayment on Base, $0.02 per request.","tagline":"Historical EUR/AUD forex data via x402 micropayment on Base, $0.02 per request.","description":"This endpoint provides historical foreign exchange data for the EUR/AUD currency pair. It is part of the lowpaymentfee.com platform, which offers a suite of pay-per-request APIs spanning finance, analytics, AI/ML, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network.\n\nThe specific endpoint at `/api/v1/forex/EURAUD/history` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request given USDC's 6 decimal places. There are no API keys, no rate limits, and no subscription commitments — each call is paid individually via the X-PAYMENT header.\n\nDocumentation on the site is extremely sparse. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what fields the history endpoint accepts or returns. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation means callers must experiment to discover the expected POST body and response format.","tags":[],"capabilities":["forex-history","eur-aud","x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key"],"categories":["finance","forex"],"synonyms":["EUR/AUD historical rates","euro australian dollar history","forex historical data","currency pair history","FX rate history","EURAUD exchange rate"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content","No OpenAPI or schema describing request parameters or response format","Request body and response structure must be discovered by experimentation","The endpoint path suggests forex history but no details on supported date ranges, granularity, or fields are provided"],"endpointUrl":"https://lowpaymentfee.com/api/v1/forex/EURAUD/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/EURAUD/history","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing. However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty stubs. The actual request format and response structure are completely unknown, making this effectively a stub 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'no-api-key' 'offer':45 'openapi':166 'page':151 'paid':130 'pair':36 'part':39 'pay':50 'pay-per-request':49 'payment':66,136 'per':11,23,51,107 'place':114 'platform':43 'post':81,206 'price':147 'prompt':158 'proper':190 'protocol':67 'provid':27 'rate':121 'readm':150 'render':153 'request':12,24,52,82,108 'request/response':169 'respons':209 'return':84,182,188 'schema':167 'settl':68 'site':141 'span':54 'spars':144 'specif':76 'subscript':125 'suit':47 'unit':97 'usdc':70,99,110 'usdc-settlement' 'use':63 'util':60 'via':5,17,132 'wallet':157 'x':135 'x-payment':134 'x402':6,18,65,87 'x402-payment'","prices":[{"id":"eeca2403-d370-4f99-a908-e40cef81594e","listingId":"182dd004-9263-4dd4-9c33-e98bf14df300","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/EURAUD/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":"2026-04-18T18:46:32.978Z"}],"sources":[{"listingId":"182dd004-9263-4dd4-9c33-e98bf14df300","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/forex/EURAUD/history","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:32.978Z","lastSeenAt":"2026-04-29T15:05:03.075Z"}],"details":{"listingId":"182dd004-9263-4dd4-9c33-e98bf14df300","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/forex/EURAUD/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","source_url":"https://lowpaymentfee.com/api/v1/forex/EURAUD/history"},{"claim":"The platform advertises $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 address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/forex/EURAUD/history"}],"useCases":["Retrieving historical EUR/AUD exchange rates for backtesting trading strategies","Building dashboards that display historical forex trends","Feeding currency history into financial models or risk calculations","Automated agents that need on-demand forex data without subscription overhead"],"bestFor":["Agents or apps needing ad-hoc EUR/AUD historical data without API key management","Low-volume forex data consumers who prefer pay-per-call pricing","x402-compatible clients on the Base network"],"notFor":["High-frequency trading requiring sub-second latency and guaranteed SLAs","Users who need comprehensive multi-pair forex data in bulk","Anyone requiring detailed API documentation before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:18.354Z"},"updatedAt":"2026-04-29T15:05:03.075Z"}}