AUD/NZD forex exchange rate via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint provides the current AUD/NZD (Australian Dollar to New Zealand Dollar) foreign exchange rate. It is part of a broader suite of finance, data, AI, and utility APIs hosted at lowpaymentfee.com, all accessible via the x402 payment protocol on the Base network.
The endpoint accepts POST requests and returns JSON. Payment is handled inline via the x402 protocol: callers attach an X-PAYMENT header with a USDC payment on Base. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 USD. There are no API keys, no rate limits, and no signup — access is granted per-request upon valid payment. The payment settles to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using the USDC contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.
Documentation is minimal. The site's docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The endpoint is confirmed live (returns 402 challenge), but the exact response format for the forex rate data must be inferred.
Capabilities
Use cases
- —Fetching the current AUD/NZD exchange rate for trading or analytics applications
- —Integrating real-time forex data into automated trading bots or agents
- —Building currency conversion features that pay per-request without subscriptions
- —Agent-driven portfolio monitoring that needs cross-currency rates on demand
Fit
Best for
- —AI agents or bots needing on-demand AUD/NZD forex rates without API key management
- —Developers wanting pay-per-use forex data settled on-chain via USDC on Base
- —Low-volume or sporadic forex data consumers who don't want monthly subscriptions
Not for
- —High-frequency trading requiring sub-millisecond latency and bulk rate feeds
- —Users who need historical forex time-series data (no evidence this endpoint provides it)
- —Consumers without a Base-compatible USDC wallet for x402 payments
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/AUDNZD/rate \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no example payloads, and the docs pages are empty stubs. The listing is essentially a stub with only the x402 challenge and homepage listing to go on.
Warnings
- —No OpenAPI or schema documentation available — request body and response format are unknown
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content
- —Response schema for the forex rate endpoint is not documented anywhere in the crawl material
- —This endpoint is part of a site offering many diverse APIs (AI, finance, utils) with identical $0.02 pricing — quality and reliability of individual endpoints is unverified
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/forex/AUDNZD/rate
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/forex/AUDNZD/rate
- —Site advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Finance & Web3 category includes Exchange Rates and Price Feeds endpointshttps://lowpaymentfee.com