AUD/USD forex rate via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint provides AUD/USD 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. All endpoints on the platform share a uniform pricing model of $0.02 per request, settled in USDC on the Base network.
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 payment of up to 20,000 base units of USDC (i.e., $0.02, since USDC uses 6 decimals). No API keys or account registration are required — access is granted per-request upon valid payment. The platform advertises no rate limits.
Documentation beyond the landing page is extremely sparse. The /docs, /pricing, /api, and /README pages all returned only a "Connect wallet" prompt with no additional content. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The exact fields returned for the AUD/USD forex quote (e.g., bid, ask, mid, timestamp) are unknown and must be discovered by making a paid request.
Capabilities
Use cases
- —Fetching real-time or recent AUD/USD exchange rates for trading bots or financial dashboards
- —Programmatic currency conversion in applications handling Australian and US dollars
- —Agent-driven forex data retrieval with per-request micropayments, no subscription needed
Fit
Best for
- —Agents or apps needing on-demand AUD/USD rates without API key management
- —Low-volume forex data consumers who prefer pay-per-use over subscriptions
- —x402-native workflows settling micropayments in USDC on Base
Not for
- —High-frequency trading requiring sub-millisecond latency or bulk historical data
- —Users who need comprehensive multi-pair forex coverage from a single documented API
- —Anyone requiring detailed API documentation or SLA guarantees before integration
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/AUDUSD \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-signed-payment>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no example payloads, and all documentation pages are empty stubs. The actual data returned is entirely unknown.
Warnings
- —No API documentation available — /docs, /pricing, /api, and /README pages are all empty stubs showing only 'Connect wallet'.
- —No request or response schema is documented; the exact fields returned for the forex quote are unknown.
- —No OpenAPI or machine-readable spec found.
- —Platform hosts many diverse endpoint categories (AI, analytics, crypto, utils) all at $0.02 — unclear depth or reliability of any individual endpoint.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20,000 base units of USDC on Base network.https://lowpaymentfee.com/api/v1/forex/AUDUSD
- —All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/forex/AUDUSD