SOFR Historical Data API: Timeseries, Charts & Downloads. SOFR is a first-class symbol here. Call GET /api/v1/latest?symbols=SOFR with query api_key. Starter allows 1 symbol per latest request.
Starter is $19/mo with a 7-day trial. Do not send base=USD if you need a non-USD money-market print. MCP: interestratesapi.com/mcp. Register: interestratesapi.com/register.
Request: latest SOFR
curl "https://interestratesapi.com/api/v1/latest?api_key=YOUR_API_KEY&symbols=SOFR"Sibling: official convert mix (SOFR / EURIBOR_3M)
curl "https://interestratesapi.com/api/v1/convert?from=SOFR&to=EURIBOR_3M&amount=500000&term_months=24&api_key=YOUR_API_KEY"That sample prints EURIBOR_3M 2.41 (2026-03-31) vs SOFR 4.31 (2026-04-19). Do not reuse those as a SOFR “today” number — copy the latest curl.
Go live
1. Register — 7-day trial.
2. GET latest with symbols=SOFR.
