AUD/CAD forex rate via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint provides AUD/CAD foreign exchange rate data, accessible through 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 request costs $0.02 (20,000 base units of USDC on the Base network, where USDC has 6 decimals). No API keys or accounts are required — callers pay per request via an on-chain USDC micropayment.
The endpoint accepts POST requests and returns JSON. The x402 challenge confirms the endpoint is live, advertising version 1 of the protocol with an "exact" payment scheme. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on the Base L2 network, with a maximum timeout of 300 seconds.
Documentation is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no example request/response payloads, and no description of what fields the forex endpoint returns. The specific data source, update frequency, and response format are unknown.
Capabilities
Use cases
- —Fetching the current AUD/CAD exchange rate for trading or analytics applications
- —Integrating real-time forex data into an agent workflow without managing API keys
- —Paying per-call for currency data to avoid subscription commitments
Fit
Best for
- —Agents or bots that need on-demand AUD/CAD rates without signup
- —Low-volume forex data consumers who prefer pay-per-use pricing
- —x402-compatible wallets and agent frameworks on Base
Not for
- —High-frequency trading requiring sub-second latency guarantees (no SLA documented)
- —Users who need historical forex time-series data (no evidence this is supported)
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/AUDCAD \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_header>"Endpoint
Quality
The x402 challenge confirms the endpoint is live and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented request/response format, no examples, and all documentation pages return only a wallet-connect prompt. The actual data returned is entirely unknown.
Warnings
- —No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no content.
- —No OpenAPI or output schema provided; response format for the forex endpoint is unknown.
- —Data source and update frequency for AUD/CAD rates are not disclosed.
- —The site hosts many diverse API categories (AI, analytics, crypto, utils) all at $0.02 — quality and reliability of each is unverified.
Citations
- —Endpoint returns 402 with x402 challenge advertising USDC on Base at 20000 base units ($0.02)https://lowpaymentfee.com/api/v1/forex/AUDCAD
- —Site advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/forex/AUDCAD