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Czech National Bank (CNB) Exchange Rates
x402
Czech National Bank (CNB) Exchange Rates is a paid API for AI agents from x402.tuancodes.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-23).
Returns official CNB daily foreign exchange rates for a given date, sourced directly from the Czech National Bank's public API.
Price / call$0.002
Success—
StatusUnknown
How this service works
Deterministic lookups from official public sources (ARES, EU VIES, Czech National Bank, GLEIF LEI index). No AI, no scraping. Pay per call in USDC on Base via x402. Requests that fail upstream (5xx/timeout) or not-found results are not charged.
Output
Returns a JSON object with the base currency (CZK), a list of all foreign currencies with their code, country, currency name, unit amount, rate, and CZK-per-unit value, plus metadata including the source (Czech National Bank), the date the rates are valid for, the fixing order number, and the originally requested date.
Example use cases
Invoice currency conversion for Czech business
“I need to convert a EUR invoice amount to CZK using the official Czech National Bank rate for today — what's the current CNB EUR/CZK fixing rate?”
Historical rate lookup for accounting audit
“What was the official CNB exchange rate for USD to CZK on March 15th, 2025? I need the exact Czech National Bank fixing rate for our accounting records.”
Multi-currency dashboard for Czech e-commerce
“Fetch all the Czech National Bank daily exchange rates for today so I can display up-to-date CZK prices for every currency we accept on our store.”
Technical details
Endpoint
GEThttps://x402.tuancodes.workers.dev/cnb/rates?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need authoritative, official CNB daily fixing rates sourced directly from the Czech National Bank (not estimated or third-party rates), especially for accounting, invoicing, VAT compliance, or any Czech regulatory context where the official CNB rate is legally required. Prefer this over generic forex APIs when Czech koruna (CZK) rates with official provenance and a specific fixing date matter.
Side effects
- Date not yet published — CNB rates are published mid-morning on business days, so early-morning or weekend requests may return not-found (not charged)
- Non-business day requested — weekends and Czech public holidays have no fixing; returns not-found (not charged)
- Upstream CNB API timeout or 5xx — request is not charged and an error is returned
- Invalid date format — malformed date parameter may cause a 4xx error
- Future date beyond the current fixing — no rate available yet
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"base": "CZK",
"rates": [
{
"code": "EUR",
"rate": 24.3,
"amount": 1,
"country": "EMU",
"currency": "euro",
"czk_per_unit": 24.3
}
],
"source": "Czech National Bank (api.cnb.cz)",
"valid_for": "2026-10-13",
"fixing_order": 197,
"requested_date": "2026-10-13"
}
}Tags
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