{"id":"ccd56ffa-67a2-4ac2-a381-05c474583410","shortId":"BFSUva","kind":"x402","title":"Real-time AUD/USD forex rate via x402 micropayment on Base for $0.02 per request.","tagline":"Real-time AUD/USD forex rate via x402 micropayment on Base for $0.02 per request.","description":"This endpoint provides the current AUD/USD foreign exchange rate, accessible through the x402 payment protocol on the Base network. Each request costs $0.02 (20,000 base units of USDC with 6 decimals) and requires no API keys, accounts, or rate limits — just an x402-compatible payment header.\n\nThe endpoint is part of a broader suite of APIs offered by lowpaymentfee.com, which spans data analytics, AI/ML inference, finance, crypto, and utility services, all priced uniformly at $0.02 per call. Payment is settled on-chain via USDC on Base to the provider's wallet. The x402 challenge confirms the endpoint is live and accepting POST requests with JSON responses.\n\nDocumentation beyond the landing page is minimal — the /docs, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI schema, no example request/response payloads, and no description of the response format. The endpoint path and naming convention (forex/AUDUSD/rate) strongly suggest it returns a simple exchange rate object, but the exact response schema is unconfirmed.","tags":[],"capabilities":["forex-rate","aud-usd","x402-payment","usdc-base","micropayment","real-time-data","no-api-key"],"categories":["finance","forex"],"synonyms":["AUD USD exchange rate","Australian dollar to US dollar","forex rate API","currency conversion","FX rate","AUDUSD spot rate","foreign exchange rate"],"warnings":["No OpenAPI or JSON schema available for request or response","Documentation pages (/docs, /pricing, /README) are empty beyond a wallet-connect prompt","Response format is unknown — no example payloads are provided anywhere","The broader lowpaymentfee.com platform lists many endpoints but provides no technical documentation for any of them"],"endpointUrl":"https://lowpaymentfee.com/api/v1/forex/AUDUSD/rate","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/AUDUSD/rate","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.400","qualityRationale":"The x402 challenge is live and confirms pricing and payment details, but there is no OpenAPI schema, no documented request/response format, and all documentation pages beyond the landing page are empty. The endpoint's behavior must be inferred entirely from its URL 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'/pricing':149 '/readme':151 '0.02':13,28,53,107 '000':55 '20':54 '6':61 'AUD USD exchange rate' 'AUDUSD spot rate' 'Australian dollar to US dollar' 'FX rate' 'accept':134 'access':40 'account':68 'addit':162 'ai/ml':96 'analyt':95 'api':66,88 'aud-usd' 'aud/usd':4,19,36 'base':11,26,48,56,119 'beyond':141 'broader':85 'call':109 'chain':115 'challeng':127 'compat':76 'confirm':128 'connect':157 'convent':186 'cost':52 'crypto':99 'currency conversion' 'current':35 'data':94 'decim':62 'descript':176 'detail':164 'document':140 'endpoint':32,80,130,182 'exact':199 'exampl':171 'exchang':38,194 'financ':98 'foreign':37 'foreign exchange rate' 'forex':5,20 'forex rate API' 'forex-rate' 'forex/audusd/rate':187 'format':180 'header':78 'infer':97 'json':138 'key':67 'land':143 'limit':71 'live':132 'lowpaymentfee.com':91 'micropay':9,24 'micropayment' 'minim':146 'name':185 'network':49 'no-api-key' 'object':196 'offer':89 'on-chain':113 'openapi':168 'page':144,152 'part':82 'path':183 'payload':173 'payment':44,77,110 'per':14,29,108 'post':135 'price':104 'prompt':159 'protocol':45 'provid':33,122 'rate':6,21,39,70,195 'real':2,17 'real-tim':1,16 'real-time-data' 'render':154 'request':15,30,51,136 'request/response':172 'requir':64 'respons':139,179,200 'return':191 'schema':169,201 'servic':102 'settl':112 'simpl':193 'span':93 'strong':188 'suggest':189 'suit':86 'technic':163 'time':3,18 'unconfirm':203 'uniform':105 'unit':57 'usdc':59,117 'usdc-base' 'util':101 'via':7,22,116 'wallet':124,158 'x402':8,23,43,75,126 'x402-compatible':74 'x402-payment'","prices":[{"id":"c7d2501e-ba75-445b-b46c-92add4eec45f","listingId":"ccd56ffa-67a2-4ac2-a381-05c474583410","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/AUDUSD/rate","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:46:33.592Z"}],"sources":[{"listingId":"ccd56ffa-67a2-4ac2-a381-05c474583410","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/forex/AUDUSD/rate","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:33.592Z","lastSeenAt":"2026-04-29T15:05:03.203Z"}],"details":{"listingId":"ccd56ffa-67a2-4ac2-a381-05c474583410","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/forex/AUDUSD/rate \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns HTTP 402 with x402 challenge, confirming it is live","source_url":"https://lowpaymentfee.com/api/v1/forex/AUDUSD/rate"},{"claim":"Price is $0.02 per request (maxAmountRequired 20000 in USDC on Base, 6 decimals)","source_url":"https://lowpaymentfee.com"},{"claim":"Payment asset is USDC at contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/forex/AUDUSD/rate"},{"claim":"No API keys, no rate limits, instant access advertised","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching the current AUD/USD exchange rate for trading bots or financial dashboards","Integrating real-time forex data into agent workflows without API key management","Pay-per-call currency rate lookups for low-volume or sporadic use cases"],"bestFor":["Agents or bots needing on-demand AUD/USD rates without subscription commitments","Developers prototyping forex-aware applications with minimal setup","x402-native workflows that settle micropayments on Base"],"notFor":["High-frequency trading requiring sub-millisecond latency and bulk rate feeds","Users who need historical forex data or OHLCV candles","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:18.306Z"},"updatedAt":"2026-04-29T15:05:03.203Z"}}