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API · /cnb-api

Czech National Bank (CNB) FX API

healthy 4,197 Subscribers

Live official Czech foreign-exchange fixing, served straight from the Czech National Bank's open API — no key, nothing cached. The CNB declares one official rate per currency every working day. The rates endpoint returns the whole daily fixing — around 30 world currencies against the koruna (CZK), each with the country, the unit amount it is quoted per and the rate — and accepts a date so you can pull the official fixing for any past working day. The currency endpoint returns one currency's rate, normalised to the koruna value of a single unit, for the latest day or a chosen date — the US dollar fixed around 21 koruna in mid-2026. The convert endpoint turns an amount from any currency into any other, crossed through the koruna at the official fixing, on the latest day or a historical date. The history endpoint returns a currency's official rate over the last several working days. Everything is the central bank's own published fixing, live, nothing stored. This is the Czech koruna FX layer for any forex, payments, e-commerce, accounting or treasury app operating in Czechia and Central Europe — and a clean source of historical FX by date. Distinct from the ECB, Fed, Bank of Canada, Norges Bank, Bank of England, Brazil and Poland central-bank APIs — this is the koruna and the CNB daily fixing, queryable by date. 5 endpoints, no key on our side.

#czech #cnb #central-bank #forex #koruna #czk #exchange-rates #historical-fx
api.oanor.com/cnb-api
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Machine-readable spec so AI agents can integrate this API.

/api/cnb-api/openapi.json
/api/cnb-api/llms.txt

Discovery: GET /api/index.json lists every API.

Czech National Bank (CNB) FX API — live data on the oanor API marketplace

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
177 ms
Server probes · 24h
Subscribers
4,197
active
Total calls
95
last 7 days
status Full status page → · 15 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 2,000 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 2,000 calls/month
  • 2 req/sec
  • Rates, currency, convert
  • No credit card
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Starter

€9.00 /month

  • 30,000 calls / month
  • 6 requests / second
  • Hard cap (429 above quota, no overage)
  • 30,000 calls/month
  • 6 req/sec
  • Historical FX by date + history
  • Email support
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Pro

€23.00 /month

  • 170,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • 170,000 calls/month
  • 15 req/sec
  • Payments & accounting pipelines
  • Priority support
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Mega

€56.00 /month

  • 900,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • 900,000 calls/month
  • 40 req/sec
  • Platform scale
  • Dedicated SLA
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Official central-bank data from Bank Negara Malaysia (BNM), the central bank of Malaysia, all quoted around the Malaysian Ringgit (MYR). Read every BNM foreign-exchange reference rate with its buying, selling and middle quote — each row carries the BNM quoting unit (the Japanese Yen, for example, is quoted per 100) plus a normalized myr_per_unit, so conversions are never ambiguous — look up a single currency, or convert any amount between two quoted currencies or MYR using the central-bank cross rate. Beyond FX, the same surface exposes the Kijang Emas gold bullion coin buying and selling prices (one, half and quarter ounce), the current Overnight Policy Rate set by the Monetary Policy Committee, and the published base rate, base lending rate and indicative effective lending rate for every licensed Malaysian bank. Rates always resolve to the latest published business-day fixing. Distinct from our other central-bank FX feeds: this bundles Malaysian FX, gold and policy/lending rates in one API.

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Official daily foreign-exchange reference rates published by the Central Bank of Myanmar (CBM), quoted against the Myanmar Kyat (MMK). Read every CBM reference rate in one call, look up a single currency, or convert any amount between two quoted currencies (or MMK) using the central-bank cross rate. CBM follows a per-100 quoting convention for its low-value currencies — Indonesian Rupiah, Japanese Yen, Cambodian Riel, South Korean Won, Lao Kip and Vietnamese Dong are published per 100 units while every other currency is per 1 — so each rate carries both the raw quoted_rate and quoted_per plus a normalized mmk_per_unit, making conversions unambiguous. Rates always resolve to the latest published business-day fixing. Distinct from our other central-bank feeds (Bosnia, North Macedonia, Romania, Moldova, Nepal): this surfaces the Myanmar Kyat reference table specifically.

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Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Czech National Bank (CNB) FX API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Czech National Bank (CNB) FX API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Czech National Bank (CNB) FX API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Czech National Bank (CNB) FX API cost?
Czech National Bank (CNB) FX API has a free tier with 100 calls / month. Paid plans start at €9.00 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Czech National Bank (CNB) FX API GDPR-compliant?
All requests to Czech National Bank (CNB) FX API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/cnb-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/cnb-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/cnb-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/cnb-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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