GBP/AUD historical forex data via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint provides historical foreign exchange rate data for the GBP/AUD currency pair. It is part of the lowpaymentfee.com platform, which offers a variety of pay-per-request APIs spanning finance, analytics, AI, and infrastructure — all gated via the x402 payment protocol on the Base network using USDC.
The endpoint accepts POST requests and returns JSON. Payment is handled inline: callers attach an X-PAYMENT header with a valid x402 payment proof. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 USD. There are no API keys, no rate limits, and no subscription commitments — each request is independently settled on-chain.
The platform advertises a uniform $0.02/request pricing model across all its endpoints. Documentation beyond the landing page is sparse; the /docs, /pricing, and /README pages all resolve to a minimal "Connect wallet" prompt with no further technical detail. No OpenAPI schema, request/response examples, or field-level documentation were found, so the exact request parameters (e.g., date range, granularity) and response shape (e.g., OHLC candles, close prices, timestamps) are unknown and must be discovered by calling the endpoint.
Capabilities
Use cases
- —Retrieving historical GBP/AUD exchange rates for backtesting trading strategies
- —Feeding forex history into financial models or dashboards
- —Comparing GBP/AUD trends over time for travel or remittance planning
Fit
Best for
- —Agents or apps that need on-demand forex history without API key management
- —Micropayment-native workflows on Base that want low-friction data access
- —Developers prototyping forex features who want instant, keyless access
Not for
- —High-frequency trading requiring sub-second latency and guaranteed SLAs
- —Users who need comprehensive multi-pair forex data in a single bulk download
- —Anyone without a Base-compatible USDC wallet or x402 client
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/GBPAUD/history \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and no description of supported parameters or response fields. Effectively a stub listing.
Warnings
- —No API documentation found — /docs, /pricing, /README all return only a 'Connect wallet' prompt with no technical content.
- —Request parameters (date range, granularity, pagination) are completely unknown.
- —Response schema is unknown — no examples or field descriptions available.
- —The endpoint description from the provider is generic ('Premium API Access') and does not describe the forex history functionality.
Citations
- —Uniform $0.02/request pricing, no API keys, no rate limits, Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired 20000 base units of USDC (0x8335…) on Basehttps://lowpaymentfee.com/api/v1/forex/GBPAUD/history
- —Platform offers finance, analytics, AI, and infrastructure endpointshttps://lowpaymentfee.com