Historical EUR/AUD forex data via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint provides historical foreign exchange data for the EUR/AUD currency pair. It is part of the lowpaymentfee.com platform, which offers a suite of pay-per-request APIs spanning finance, analytics, AI/ML, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network.
The specific endpoint at `/api/v1/forex/EURAUD/history` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request given USDC's 6 decimal places. There are no API keys, no rate limits, and no subscription commitments — each call is paid individually via the X-PAYMENT header.
Documentation on the site is extremely sparse. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what fields the history endpoint accepts or returns. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation means callers must experiment to discover the expected POST body and response format.
Capabilities
Use cases
- —Retrieving historical EUR/AUD exchange rates for backtesting trading strategies
- —Building dashboards that display historical forex trends
- —Feeding currency history into financial models or risk calculations
- —Automated agents that need on-demand forex data without subscription overhead
Fit
Best for
- —Agents or apps needing ad-hoc EUR/AUD historical data without API key management
- —Low-volume forex data consumers who prefer pay-per-call pricing
- —x402-compatible clients on the Base network
Not for
- —High-frequency trading requiring sub-second latency and guaranteed SLAs
- —Users who need comprehensive multi-pair forex data in bulk
- —Anyone requiring detailed API documentation before integration
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/EURAUD/history \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing. However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty stubs. The actual request format and response structure are completely unknown, making this effectively a stub listing.
Warnings
- —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content
- —No OpenAPI or schema describing request parameters or response format
- —Request body and response structure must be discovered by experimentation
- —The endpoint path suggests forex history but no details on supported date ranges, granularity, or fields are provided
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/forex/EURAUD/history
- —The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/forex/EURAUD/history