Historical CAD/JPY forex data via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint provides historical forex data for the CAD/JPY currency pair. It is part of the lowpaymentfee.com platform, which offers a variety of pay-per-request APIs spanning data analytics, AI/ML, finance, crypto, and utility services. All endpoints use the x402 payment protocol, settling in USDC on the Base network.
The endpoint accepts POST requests and returns JSON. Each call costs $0.02 (20,000 base units of USDC with 6 decimals). There are no API keys, no rate limits, and no subscription commitments — payment is handled inline via the X-PAYMENT header using the x402 protocol. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base.
Documentation on the site is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further detail. The exact request body schema (e.g., date range parameters, granularity options) and response format are not documented anywhere in the crawled material. The endpoint is confirmed live (returns a proper 402 challenge), but without request/response examples or an OpenAPI spec, callers will need to experiment to discover the expected input format.
Capabilities
Use cases
- —Retrieving historical CAD/JPY exchange rate data for backtesting trading strategies
- —Building financial dashboards that display historical forex trends
- —Feeding currency history into quantitative models or risk calculations
- —Programmatic access to forex data without API key registration
Fit
Best for
- —Agents or bots that need on-demand forex history without signup
- —Developers prototyping financial tools who want instant pay-per-call access
- —x402-compatible clients on the Base network looking for cheap data endpoints
Not for
- —Users needing real-time streaming forex quotes (this is historical data)
- —High-volume bulk data consumers who would benefit from subscription pricing
- —Users who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/forex/CADJPY/history \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, there is no OpenAPI spec, no documented request/response schema, and the site's docs pages are empty stubs. The exact parameters and response format are unknown, making this effectively a stub listing.
Warnings
- —No request body schema documented — callers must guess or discover parameters experimentally
- —No response schema or example response available anywhere in crawled content
- —Docs, pricing, and API pages on the site render only a 'Connect wallet' prompt with no useful information
- —The platform lists many endpoints but provides no detailed documentation for any of them
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/forex/CADJPY/history
- —All endpoints on the platform cost $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC contract address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 and payTo is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3https://lowpaymentfee.com/api/v1/forex/CADJPY/history