← Catalog

Czech National Bank exchange rates (central bank fixing)

Czech National Bank · The exchange rate fixing is declared every business day (no fixing on Czech public holidays or weekends in the modern era; the early-1990s history includes some holiday dates, e.g. a 1991-01-01 fixing). Monthly averages cover completed months only — the running month is absent (observed 2026-07-26). History from 1991.

License: open-government · official terms. Attribution text and per-series license flags ride in every API envelope.

Source API docs

Quickstart

Latest observations, with provenance and citation on every value:

curl "https://starwell.dev/api/starwell/v1/sources/cnb-exrates/series/exrates-monthly-avg:USD/observations?latest=12"

A computed, cited answer from this source:

curl -X POST "https://starwell.dev/api/starwell/v1/answer" \
  -H "Authorization: Bearer dlk_live_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"question": "What is the latest CNB exchange rate fixing, monthly average: USA dollar (USD)?", "source": "cnb-exrates"}'

Data reads need no key; answers do. Keys are free at /account; a keyless sample lives at GET /api/starwell/v1/answer/demo.

As MCP tools in Claude, Cursor, or any agent framework:

claude mcp add --transport http starwell https://starwell.dev/api/starwell/mcp

Data series