{"id":"6a8a6ba7-ba71-4475-836a-61f0692ba5a1","shortId":"uBAfM5","kind":"x402","title":"Historical AUD/NZD forex data via x402 micropayment on Base, $0.02 per request.","tagline":"Historical AUD/NZD forex data via x402 micropayment on Base, $0.02 per request.","description":"This endpoint provides historical forex data for the AUD/NZD currency pair. It is part of the lowpaymentfee.com platform, which offers a range of data, AI, finance, and utility APIs all priced at $0.02 per request using the x402 payment protocol on the Base network.\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 USDC payment on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. No API keys, accounts, or rate limits are advertised — access is purely pay-per-call.\n\nDocumentation on the site is extremely sparse. The crawled docs, API, pricing, and README pages all returned 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 historical forex data includes (e.g., OHLCV candles, date ranges, granularity). The endpoint is confirmed live via a valid 402 challenge, but the lack of documentation means callers will need to experiment to discover the request format and response structure.","tags":[],"capabilities":["forex-history","aud-nzd","x402-payment","usdc-base","pay-per-request","json-api"],"categories":["finance","data"],"synonyms":["AUD NZD exchange rate history","forex historical data","currency pair history","AUD/NZD price history","fx rates API","foreign exchange data"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or JSON schema for request or response bodies","Request format (required fields, date ranges, etc.) is completely undocumented","Response structure is unknown — no examples available anywhere in crawled content","The broader lowpaymentfee.com platform lists many endpoints but provides no technical docs for any of them"],"endpointUrl":"https://lowpaymentfee.com/api/v1/forex/AUDNZD/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/AUDNZD/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 schema, no request/response examples, and no documentation beyond a wallet-connect prompt. The request body format and response structure are entirely unknown, making this effectively a stub 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'000':106 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':99 '20':105 '402':191 '6':111 'AUD NZD exchange rate history' 'AUD/NZD price history' 'accept':71 'access':125 'account':119 'advertis':124 'ai':49 'amount':102 'api':53,117,142 'asset':98 'aud-nzd' 'aud/nzd':2,14,33 'base':9,21,67,97,107 'call':131 'caller':85,199 'candl':179 'challeng':192 'confirm':186 'connect':151 'content':157 'crawl':140 'currenc':34 'currency pair history' 'data':4,16,30,48,175 'date':180 'decim':112 'descript':168 'discov':205 'doc':141 'document':132,197 'e.g':177 'endpoint':26,70,184 'equal':114 'exampl':165 'experi':203 'extrem':137 'field':171 'financ':50 'foreign exchange data' 'forex':3,15,29,174 'forex historical data' 'forex-history' 'format':208 'fx rates API' 'granular':182 'handl':79 'header':91 'histor':1,13,28,173 'includ':86,176 'inlin':80 'json':76 'json-api' 'key':118 'lack':195 'limit':122 'live':187 'lowpaymentfee.com':41 'maximum':101 'mean':198 'micropay':7,19 'need':201 'network':68 'offer':44 'ohlcv':178 'openapi':161 'page':146 'pair':35 'part':38 'pay':129 'pay-per-cal':128 'pay-per-request' 'payment':63,77,90,95 'per':11,23,58,130 'platform':42 'post':72 'price':55,143 'prompt':153 'protocol':64,84 'provid':27 'pure':127 'rang':46,181 'rate':121 'readm':145 'request':12,24,59,73,207 'request/response':164 'requir':103 'respons':210 'return':75,148 'schema':162 'site':135 'spars':138 'structur':211 'unit':108 'usdc':94,110 'usdc-base' 'use':60 'util':52 'valid':190 'via':5,17,81,188 'wallet':152 'x':89 'x-payment':88 'x402':6,18,62,83 'x402-payment'","prices":[{"id":"38385af3-de62-46d6-bde9-8450f29e9d1a","listingId":"6a8a6ba7-ba71-4475-836a-61f0692ba5a1","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/AUDNZD/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":"2026-04-18T18:46:34.796Z"}],"sources":[{"listingId":"6a8a6ba7-ba71-4475-836a-61f0692ba5a1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/forex/AUDNZD/history","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:34.796Z","lastSeenAt":"2026-04-28T16:09:46.476Z"}],"details":{"listingId":"6a8a6ba7-ba71-4475-836a-61f0692ba5a1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/forex/AUDNZD/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":"Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/forex/AUDNZD/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 address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/forex/AUDNZD/history"},{"claim":"Docs, API, pricing, and README pages returned only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving historical AUD/NZD exchange rate data for backtesting trading strategies","Feeding forex history into financial models or analytics dashboards","Comparing AUD/NZD trends over time for risk assessment","Programmatic access to forex data without API key registration"],"bestFor":["Developers needing quick, keyless access to AUD/NZD historical forex data","Agents or bots that can pay per-call via x402 on Base","Low-volume or ad-hoc forex data retrieval without subscription commitments"],"notFor":["High-frequency trading requiring sub-second latency and guaranteed SLAs","Users who need comprehensive multi-pair forex data in a single call","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:18.242Z"},"updatedAt":"2026-04-28T16:09:46.476Z"}}