Historical AUD/CAD forex data via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint provides historical forex data for the AUD/CAD currency pair, accessible through the x402 payment protocol. It is hosted on lowpaymentfee.com, a platform offering a variety of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. Each request costs $0.02 (20,000 base units of USDC on the Base network, with 6 decimals). No API keys or rate limits are required — payment is handled inline via the x402 X-PAYMENT header.
The endpoint accepts POST requests and returns JSON. The specific schema of the historical forex response (e.g., OHLCV candles, date ranges, granularity options) is not documented in the crawled material, so the exact request parameters and response shape must be discovered by calling the endpoint. The platform advertises simple, uniform pricing across all its endpoints at $0.02 per call, settled in USDC on the Base L2 network.
The x402 challenge was successfully captured with a 402 response, confirming the endpoint is live. However, the site's documentation pages (/docs, /pricing, /api, /README) all returned only a "Connect wallet" prompt with no substantive content, so detailed API documentation is unavailable.
Capabilities
Use cases
- —Retrieving historical AUD/CAD exchange rate data for backtesting trading strategies
- —Feeding forex history into financial models or dashboards
- —Programmatic access to currency pair data without API key management
- —Agent-driven forex data retrieval with inline micropayments
Fit
Best for
- —Developers needing quick, keyless access to AUD/CAD historical forex data
- —AI agents that can settle x402 payments autonomously on Base
- —Low-volume or sporadic forex data consumers who prefer pay-per-use over subscriptions
Not for
- —High-frequency trading requiring sub-second latency and bulk data
- —Users who need comprehensive multi-pair forex coverage from a single well-documented API
- —Anyone unable to settle USDC payments on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/AUDCAD/history \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The x402 challenge confirms the endpoint is live and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI schema, no documented request/response format, and all documentation pages are empty stubs showing only 'Connect wallet'. The actual data returned is unknown.
Warnings
- —No API documentation available — /docs, /pricing, /api, and /README pages all return only a 'Connect wallet' prompt with no content.
- —Request parameters and response schema for the forex history endpoint are completely undocumented; callers must discover the interface by trial.
- —The platform hosts many diverse endpoint categories (AI, analytics, finance, utils) all at $0.02 — quality and depth of each individual endpoint is unverified.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/forex/AUDCAD/history
- —USDC contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/forex/AUDCAD/history
- —Platform advertises $0.02 per request, no API keys, no rate limits, Base networkhttps://lowpaymentfee.com
- —Documentation pages (/docs, /pricing, /api, /README) contain only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs