Cnb

dev.cz-agentsPublished by cz-agents.devOfficial publisherv0.1.7Updated Oct 24, 2026

Official ČNB exchange rates — daily & historical CZK vs EUR, USD, 30+ currencies. For accounting.

The publisher's own server: Adis

VerifiedStreamable HTTPWeb executableFinance Data & Analytics

Server details

Identifier: dev.cz-agents/cnb
Transport: Streamable HTTP
Runtime: Web executable
Trust: Verified
Published: Sep 16, 2026

Security note

MCP servers receive tool arguments from a conversation and may perform external actions. Review what a server can do before you enable it, and give it only the access it needs.

The registry verified that this server's namespace belongs to cz-agents.dev, which also runs its endpoint. That identifies the publisher; it does not make the server's tools safe.

SourceWeft's checks cover whether the listing is complete and the endpoint answered; they do not review the server's code or what its tools do.

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Overview

AI-generated overview

Provides official Czech National Bank (ČNB) CZK exchange rates, letting an assistant look up daily or historical rates and convert amounts between currencies.

What you can do: Retrieve the full ČNB daily rate sheet for the latest or a given date, covering around 31 major currencies against the CZK. Look up a single currency's CZK rate, or all rates when no code is given. Convert an amount between two currencies using official rates, including cross-rates via CZK and historical dates.
When to use it: Useful for accounting, invoicing and reporting work in the Czech Republic that needs authoritative CZK rates, or for converting amounts between currencies at official daily or historical rates.
Requirements: Runs as a remote endpoint or as a local process via npx from the npm package @czagents/cnb. No authentication, environment variables or headers are declared. Network access is needed to reach the rate data.

Before you install

The hosted endpoint is rate-limited per IP, and higher limits or commercial use are offered as a paid option. Rates are official daily reference values, so confirm they suit the specific accounting or invoicing purpose.

Installation

In SourceWeft

Open Cnb in the dashboard and add it to a workspace.
Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/dev.cz-agents%2Fcnb/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "cnb": {
      "type": "http",
      "url": "https://cnb.cz-agents.dev/mcp"
    }
  }
}

README

@czagents/cnb

Official Czech National Bank (ČNB) exchange rates — daily and historical CZK rates against EUR, USD, and 30+ currencies. Direct from the central bank, the authoritative source for accounting and invoicing in the Czech Republic.

Install

Usage with Claude Desktop

json

{  "mcpServers": {    "cnb": {      "command": "npx",      "args": ["-y", "@czagents/cnb"]    }  }}

{  "mcpServers": {    "cnb": {      "command": "npx",      "args": ["-y", "@czagents/cnb"]    }  }}

Tools

`get_rates`

Use it to obtain the full ČNB daily currency sheet, either latest or for a valid historical ISO date. Do not use it when only one currency rate is needed; use get_rate.

`convert`

Use it to convert a numeric amount between ISO 4217 currencies with ČNB’s official daily rates, including a historical date when necessary. Do not use it for a rate quotation without an amount; use get_rate.

`get_rate`

Use it to retrieve one currency’s official CZK rate from the latest or a historical ČNB sheet. Do not use it for a cross-currency conversion such as USD to EUR; use convert.

Self-host

Source: https://github.com/martinhavel/cz-agents-mcp

bash

git clone https://github.com/martinhavel/cz-agents-mcpcd cz-agents-mcpnpm installnpm run buildnode packages/cnb/dist/index.js

git clone https://github.com/martinhavel/cz-agents-mcpcd cz-agents-mcpnpm installnpm run buildnode packages/cnb/dist/index.js

Free tier & pricing

ČNB exposes the rate sheet for free. The hosted endpoint at https://cnb.cz-agents.dev/mcp is rate-limited per IP. Higher limits and commercial use: https://cz-agents.dev/pricing.html

License

MIT — see LICENSE

Source: packages/cnb/README.md at commit 780ee76

Tools

get_rates

Get ČNB Daily FX Rates

Get official CZK exchange rates published by ČNB. Returns all currencies from the daily sheet (~31 majors). Optional `date` parameter (YYYY-MM-DD) for historical rates; otherwise returns latest.

Parametersdate

convert

Convert Currency via ČNB Rates

Convert an amount between two currencies using official ČNB rates. E.g., convert 100 EUR to CZK, or 50 USD to GBP (goes via CZK cross-rate). Optional `date` for historical conversion.

Parameterstorequireddatefromrequiredamountrequired

get_rate

Get Single Currency ČNB Rate

Quick single-currency lookup. Returns just the CZK rate for one currency (or all rates if no code given).

Parameterscoderequireddate

Version history

v0.1.7LatestSep 16, 2026

Score

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