A Bank of Canada overnight rate API returns BOC_OVERNIGHT as JSON. On Interest Rates API that is GET /api/v1/latest with symbols=BOC_OVERNIGHT. US 10Y stays on Bonds-API. Starter is one symbol per request.
Starter is $19/mo with a 7-day trial. MCP: interestratesapi.com/mcp.
Request: latest BOC_OVERNIGHT
curl "https://interestratesapi.com/api/v1/latest?api_key=YOUR_API_KEY&symbols=BOC_OVERNIGHT"
Response: live Interest Rates API latest (dated 2026-08-31)
{
"success": true,
"date": "2026-08-31",
"base": "CAD",
"rates": {"BOC_OVERNIGHT": 2.25},
"dates": {"BOC_OVERNIGHT": "2026-08-31"},
"currencies": {"BOC_OVERNIGHT": "CAD"}
}
The print is dated 2026-08-31, not “today”. Do not pass base=USD if you need this CAD series.
Go live
1. Register — 7-day trial.
2. Copy api_key.
3. GET /api/v1/latest with symbols=BOC_OVERNIGHT.
4. Store rates.BOC_OVERNIGHT and the dated field.





