# Frankfurter > Currency data API. Current and historical exchange rates for 201 currencies from 84 central banks and official sources. No authentication required. Open-source. Genuinely free, not "free with limits." - Docs: https://frankfurter.dev - OpenAPI: https://api.frankfurter.dev/v2/openapi.json - MCP: https://mcp.frankfurter.dev - Self-host (Docker): https://frankfurter.dev/deploy/ - Source: https://github.com/lineofflight/frankfurter ## Examples https://api.frankfurter.dev/v2/rates https://api.frankfurter.dev/v2/rates?date=1999-01-04 https://api.frankfurter.dev/v2/rates?base=USD"es=GBP,JPY https://api.frankfurter.dev/v2/rates?providers=ECB https://api.frankfurter.dev/v2/rates?from=2025-01-01&to=2025-12-31&group=month