{"id":"30ed3ffc-2b36-4167-a2d6-2bef48fa280b","shortId":"V95UX7","kind":"x402","title":"Historical NZD/CHF forex data via pay-per-request x402 on Base network","tagline":"Historical NZD/CHF forex data via pay-per-request x402 on Base network","description":"This endpoint provides historical forex data for the NZD/CHF currency pair. It is part of the lowpaymentfee.com platform, which offers a variety of pay-per-call APIs spanning finance, analytics, AI, and infrastructure — all settled via the x402 protocol on the Base network using USDC.\n\nThe endpoint is accessed via HTTP POST at `/api/v1/forex/NZDCHF/history`. Each request costs $0.02 (20,000 base units of USDC with 6 decimals) and requires no API key or account registration. Payment is handled inline through the x402 `X-PAYMENT` header. The platform advertises no rate limits and instant access.\n\nDocumentation beyond the landing page is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what parameters the history endpoint accepts or what shape the response takes. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation makes it difficult to know what historical data granularity, date ranges, or output fields are available.","tags":[],"capabilities":["forex-history","nzd-chf","x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key"],"categories":["finance","forex"],"synonyms":["NZD CHF exchange rate history","New Zealand Dollar Swiss Franc historical data","forex historical rates","currency pair history API","NZD/CHF time series"],"warnings":["No API documentation available — docs, pricing, and README pages are empty","No OpenAPI or JSON schema describing request parameters or response format","The specific endpoint /api/v1/forex/NZDCHF/history is not listed on the landing page; only /api/v1/finance/rates and /api/v1/finance/prices are shown, so this may be an undocumented or newer route","Cannot confirm what historical data fields, date ranges, or granularity are supported"],"endpointUrl":"https://lowpaymentfee.com/api/v1/forex/NZDCHF/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/NZDCHF/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 402 challenge, confirming it exists and accepts payment. However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty beyond a wallet-connect prompt. The exact request parameters and response format are 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'0.02':85 '000':87 '20':86 '402':181 '6':93 'NZD CHF exchange rate history' 'NZD/CHF time series' 'New Zealand Dollar Swiss Franc historical data' 'accept':166 'access':76,122 'account':101 'addit':147 'advertis':116 'ai':58 'analyt':57 'api':54,98,133 'avail':203 'base':12,25,69,88 'base-network' 'beyond':124 'call':53 'challeng':182 'confirm':176 'connect':142 'content':148 'cost':84 'currenc':36 'currency pair history API' 'data':4,17,32,195 'date':197 'decim':94 'descript':159 'difficult':190 'doc':132 'document':123,187 'endpoint':28,74,165,174 'exampl':156 'extrem':129 'field':201 'financ':56 'forex':3,16,31 'forex historical rates' 'forex-history' 'granular':196 'handl':105 'header':113 'histor':1,14,30,194 'histori':164 'http':78 'infrastructur':60 'inlin':106 'instant':121 'key':99 'know':192 'lack':185 'land':126 'limit':119 'live':177 'lowpaymentfee.com':43 'make':188 'network':13,26,70 'no-api-key' 'nzd-chf' 'nzd/chf':2,15,35 'offer':46 'openapi':152 'output':200 'page':127,137 'pair':37 'paramet':162 'part':40 'pay':7,20,51 'pay-per-cal':50 'pay-per-request':6,19 'payment':103,112 'per':8,21,52 'platform':44,115 'post':79 'price':134 'prompt':144 'proper':180 'protocol':66 'provid':29 'rang':198 'rate':118 'readm':136 'registr':102 'render':139 'request':9,22,83 'request/response':155 'requir':96 'respons':171 'return':178 'schema':153 'settl':62 'shape':169 'span':55 'spars':130 'take':172 'unit':89 'usdc':72,91 'usdc-settlement' 'use':71 'varieti':48 'via':5,18,63,77 'wallet':143 'x':111 'x-payment':110 'x402':10,23,65,109 'x402-payment'","prices":[{"id":"b2677814-a9f1-4544-83d4-391d2b9ed11a","listingId":"30ed3ffc-2b36-4167-a2d6-2bef48fa280b","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/NZDCHF/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":"2026-04-18T18:46:52.680Z"}],"sources":[{"listingId":"30ed3ffc-2b36-4167-a2d6-2bef48fa280b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/forex/NZDCHF/history","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:52.680Z","lastSeenAt":"2026-04-29T13:05:03.342Z"}],"details":{"listingId":"30ed3ffc-2b36-4167-a2d6-2bef48fa280b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/forex/NZDCHF/history \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","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/NZDCHF/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 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/forex/NZDCHF/history"}],"useCases":["Retrieving historical NZD/CHF exchange rate data for backtesting trading strategies","Feeding forex history into financial models or analytics dashboards","Programmatic access to NZD/CHF rates without API key management"],"bestFor":["Agents or apps needing on-demand forex history with crypto-native payment","Developers who want keyless, pay-per-call access to currency data","Automated trading systems that need NZD/CHF historical rates"],"notFor":["Users needing comprehensive multi-pair forex data in a single call","Anyone requiring detailed API documentation or guaranteed SLAs before integrating","High-volume consumers who need bulk historical data downloads at lower per-unit cost"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:17.331Z"},"updatedAt":"2026-04-29T13:05:03.342Z"}}