Bank of Canada Valet API
The Bank of Canada's free public API for historical interest rate, exchange rate, and bond yield data.
The Valet API is the Bank of Canada's open data service, giving free programmatic access to official series like the overnight policy rate, government bond yields, and the USD/CAD exchange rate, going back for decades.
This site pulls the overnight rate, 2/3/5/7/10-year and long-term bond yields, and USD/CAD from the Valet API on every scheduled pipeline run — see the raw, unprocessed pull on the pipeline page.