{"id":"fc2eb99a-6495-426e-bdd3-89d049ef65dd","shortId":"8FdrXr","kind":"x402","title":"Pay-per-call EUR/AUD forex rate via x402 on Base, settled in USDC.","tagline":"Pay-per-call EUR/AUD forex rate via x402 on Base, settled in USDC.","description":"This endpoint provides EUR/AUD foreign exchange rate data, accessible via the x402 payment protocol. It is part of a broader suite of APIs hosted at lowpaymentfee.com covering finance, analytics, AI/ML, crypto, and utility services. Each call costs $0.02 in USDC on the Base network — no API keys, no rate limits, and no subscriptions required.\n\nThe endpoint accepts HTTP POST requests and returns JSON. Payment is handled inline via the X-PAYMENT header using the x402 \"exact\" scheme. The USDC asset contract on Base (0x8335…2913) is used for settlement, with a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, and the payment timeout is 300 seconds.\n\nDocumentation on the site is extremely sparse — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further detail. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawled content. The exact structure of the forex response (e.g., whether it returns a spot rate, bid/ask spread, timestamp, etc.) is unknown and must be discovered by calling the endpoint.","tags":[],"capabilities":["forex-rates","eur-aud","x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key"],"categories":["finance","forex"],"synonyms":["EUR/AUD exchange rate","euro australian dollar rate","forex API","currency conversion","FX rate","foreign exchange data","EURAUD spot rate"],"warnings":["No OpenAPI spec or schema available — request and response formats are unknown","Documentation pages (docs, pricing, API, README) all render only 'Connect wallet' with no content","The exact nature of the forex data (spot rate, bid/ask, historical, etc.) cannot be confirmed from available material","No rate limit or SLA information provided"],"endpointUrl":"https://lowpaymentfee.com/api/v1/forex/EURAUD","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","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 with clear pricing. However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The actual data returned is entirely unknown, making this effectively a stub 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'000':125 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':140 '0x8335':113 '20':124 '2913':114 '300':146 '6':133 'EUR/AUD exchange rate' 'EURAUD spot rate' 'FX rate' 'accept':85 'access':37 'address':138 'ai/ml':58 'amount':122 'analyt':57 'api':51,74,159 'asset':109 'avail':184 'base':11,25,71,112,126 'base-network' 'bid/ask':203 'broader':48 'call':4,18,64,214 'connect':165 'content':188 'contract':110 'cost':65 'cover':55 'crawl':187 'crypto':59 'currency conversion' 'data':36 'decim':134 'detail':171 'discov':212 'doc':156 'document':148 'e.g':196 'endpoint':30,84,216 'etc':206 'eur-aud' 'eur/aud':5,19,32 'euro australian dollar rate' 'exact':105,190 'exampl':183 'exchang':34 'extrem':153 'financ':56 'foreign':33 'foreign exchange data' 'forex':6,20,194 'forex API' 'forex-rates' 'given':130 'handl':94 'header':101 'host':52 'http':86 'i.e':128 'inlin':95 'json':91 'key':75 'limit':78 'lowpaymentfee.com':54 'maximum':121 'must':210 'network':72 'no-api-key' 'openapi':175 'page':160 'part':45 'pay':2,16 'pay-per-cal':1,15 'pay-per-call' 'payment':41,92,100,136,143 'per':3,17 'post':87 'price':157 'prompt':167 'protocol':42 'provid':31 'rate':7,21,35,77,202 'recipi':137 'render':162 'request':88 'request/response':178 'requir':82 'respons':195 'return':90,199 'schema':179 'scheme':106 'second':147 'servic':62 'settl':12,26 'settlement':118 'site':151 'spars':154 'spec':176 'spot':201 'spread':204 'structur':191 'subscript':81 'suit':49 'timeout':144 'timestamp':205 'unit':127 'unknown':208 'usag':182 'usdc':14,28,68,108,131 'usdc-settlement' 'use':102,116 'util':61 'via':8,22,38,96 'wallet':166 'whether':197 'x':99 'x-payment':98 'x402':9,23,40,104 'x402-payment'","prices":[{"id":"1b768e5f-fe3e-4554-9acb-f99d74b69e87","listingId":"fc2eb99a-6495-426e-bdd3-89d049ef65dd","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","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:46:39.603Z"}],"sources":[{"listingId":"fc2eb99a-6495-426e-bdd3-89d049ef65dd","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/forex/EURAUD","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:39.603Z","lastSeenAt":"2026-04-29T14:34:10.161Z"}],"details":{"listingId":"fc2eb99a-6495-426e-bdd3-89d049ef65dd","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/forex/EURAUD \\\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 x402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/forex/EURAUD"},{"claim":"Site-wide 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/EURAUD"}],"useCases":["Fetching real-time or recent EUR/AUD exchange rates for trading bots or dashboards","Integrating forex data into agent workflows that can pay per call via x402","Building currency conversion features without managing API key subscriptions"],"bestFor":["Agents or apps that need on-demand EUR/AUD rates without subscription overhead","x402-native workflows settling micropayments in USDC on Base","Developers who want zero-signup access to forex data"],"notFor":["High-frequency trading requiring sub-millisecond latency and guaranteed SLAs","Users who need comprehensive multi-pair forex coverage from a single documented API","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:17.97Z"},"updatedAt":"2026-04-29T14:34:10.161Z"}}