GBP/AUD forex exchange rate via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint returns the current GBP/AUD foreign exchange rate, accessible through the x402 payment protocol on the Base network. It is part of a broader suite of APIs offered by lowpaymentfee.com spanning finance, analytics, AI, and utility services, all priced at $0.02 per request paid in USDC.
The endpoint accepts POST requests and returns JSON. Payment is handled inline via the x402 protocol: callers include an X-PAYMENT header with a signed USDC payment on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. There are no API keys, no rate limits, and no signup required — access is granted per-request upon valid payment.
Documentation beyond the landing page is extremely sparse. The /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no example request/response, and no description of the response schema. The endpoint is confirmed live (returns 402 challenge), but the actual response format for the forex rate must be inferred.
Capabilities
Use cases
- —Fetching the current GBP/AUD exchange rate for trading or portfolio applications
- —Integrating live forex data into financial dashboards without API key management
- —Agent-driven currency conversion workflows that pay per call via x402
Fit
Best for
- —Developers needing simple pay-per-call forex data without subscriptions
- —AI agents that can settle x402 payments on Base
- —Low-volume or sporadic forex rate lookups where $0.02/request is cost-effective
Not for
- —High-frequency trading requiring sub-millisecond latency and bulk rate feeds
- —Users who need historical forex data or OHLC candles (not indicated as available)
- —Applications that cannot settle USDC payments on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/GBPAUD/rate \
-H "X-PAYMENT: <x402-signed-payment-header>" \
-H "Content-Type: application/json"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 all documentation pages are empty beyond a wallet-connect prompt. The actual forex data quality and response format are unknown.
Warnings
- —No OpenAPI or schema documentation available — response format is unknown
- —All doc pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no content
- —The specific /forex/GBPAUD/rate endpoint is not listed on the landing page; only /finance/rates is shown, so this may be an undocumented or auxiliary route
- —No information on data source, update frequency, or accuracy of the forex rate
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/forex/GBPAUD/rate
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/forex/GBPAUD/rate
- —Documentation pages (/docs, /pricing, /api, /README) contain only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs