Real-time AUD/USD forex rate via x402 micropayment on Base for $0.02 per request.
What it does
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.
The 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.
Documentation 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.
Capabilities
Use cases
- —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
Fit
Best for
- —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
Not for
- —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
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/AUDUSD/rate \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_header>"Endpoint
Quality
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 path.
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
Citations
- —Endpoint returns HTTP 402 with x402 challenge, confirming it is livehttps://lowpaymentfee.com/api/v1/forex/AUDUSD/rate
- —Price is $0.02 per request (maxAmountRequired 20000 in USDC on Base, 6 decimals)https://lowpaymentfee.com
- —Payment asset is USDC at contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/forex/AUDUSD/rate
- —No API keys, no rate limits, instant access advertisedhttps://lowpaymentfee.com