Czech National Bank Exchange Rate API

Official Czech National Bank (Czech Republic) daily exchange rates as JSON: 33 currencies, history back to 2016. The published CZK rates required for tax, audits, and compliant invoicing.

Quick start

One request for the pair you need — EUR to CZK at the official Czech National Bank rate:

curl "https://allratestoday.com/api/v1/central-bank/cnb/latest?source=EUR&target=CZK" \
  -H "Authorization: Bearer art_live_your_key"

Or the bank's full published table:

curl "https://allratestoday.com/api/v1/central-bank/cnb/latest" \
  -H "Authorization: Bearer art_live_your_key"

On paid plans, any historical date or a daily time series:

curl "https://allratestoday.com/api/v1/central-bank/cnb/history?source=EUR&target=CZK&from=2025-01-01" \
  -H "Authorization: Bearer art_live_your_key"

Latest published rates (2026-07-28)

The most recent table as published by Czech National Bank — exactly what the /latest endpoint returns right now. Values are CZK per 1 unit of each currency:

Why use the official Czech National Bank rate?

Live market rates move continuously, but tax filings, customs declarations, audits, and statutory accounting in Czech Republic and beyond typically require the official rate published by Czech National Bank for a given date — a fixed, citable number that never changes after publication. This API serves those published tables with the bank's own rate_date on every response; weekends and holidays return the most recent published date, which is the rate compliance rules require you to apply.

Pairs the bank doesn't print directly are resolved from its table (inverse or cross via CZK) and explicitly flagged "derived": true — so what the bank printed and what was computed are never confused.

Endpoints

• GET /api/v1/central-bank/cnb/latest — latest table or single pair (all plans)
• GET /api/v1/central-bank/cnb/{YYYY-MM-DD} — the table for any date (paid plans)
• GET /api/v1/central-bank/cnb/history — daily time series, up to 5,000 rows (paid plans)

Full parameter reference in the API documentation. Every request counts toward your plan's monthly quota — rates change once per business day, so caching a day's table locally makes a small quota go far.

Frequently asked questions

Is there an API for Czech National Bank exchange rates?

Yes — this one. Official daily CZK rates as clean JSON, latest table on every plan including free.

How often are the rates updated?

Czech National Bank publishes once per business day; the API ingests each new table shortly after publication (latest: 2026-07-28).

Are these the official rates?

Yes — ingested from Czech National Bank's own published data, served unmodified with the bank's publication date. Anything computed rather than published is flagged derived.

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