# cnb

> cnb, an MCP server by cz-agents.dev, listed from the official MCP registry. Indexed, not reviewed: facts and our own checks, no score or ranking. Official ČNB exchange rates — daily & historical CZK vs EUR, USD, 30+ currencies. For accounting.

- Canonical: https://www.anchorterminal.com/tools/cz-agents-cnb
- Markdown: https://www.anchorterminal.com/tools/cz-agents-cnb.md (~700 tokens)
- Slim: https://www.anchorterminal.com/tools/cz-agents-cnb.min.md (~630 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/tools/cz-agents-cnb.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-04

# cnb

> Indexed, not reviewed: facts from the official MCP registry and our own checks. No score, grade or rank, and not in the rankings until the panel reviews it. How the index works: https://www.anchorterminal.com/indexed/

- Kind: MCP server, by cz-agents.dev (https://cz-agents.dev)
- Category: Accounting & invoicing (https://www.anchorterminal.com/categories/accounting.md)
- Listed because: It's published in the registry under cz-agents.dev, a namespace the registry only gives to whoever proves they control that domain.
- What the official MCP registry says: Official ČNB exchange rates — daily & historical CZK vs EUR, USD, 30+ currencies. For accounting.

## Facts

- MCP registry: `dev.cz-agents/cnb` 0.1.7
- Endpoint: https://cnb.cz-agents.dev/mcp (streamable HTTP)
- Package: npm `@czagents/cnb` (stdio)
- Source: https://github.com/martinhavel/cz-agents-mcp
- Website: https://cz-agents.dev
- npm downloads a week: 45
- GitHub stars: 6
- Registry entry updated: 2026-06-02

## Tools

- Tools it lists (3, about 563 tokens of context, `tools/list` without credentials over MCP 2025-11-25, checked 2026-10-04 22:24 UTC):
  - `get_rates` (read-only): Get official CZK exchange rates published by ČNB. Returns all currencies from the daily sheet (~31 majors). Optional `date` parameter (YYYY-MM-DD) for…
  - `convert` (read-only): 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`…
  - `get_rate` (read-only): Quick single-currency lookup. Returns just the CZK rate for one currency (or all rates if no code given).
- How its tools read to an agent (0 errors, 0 warnings, 1 note, about 563 tokens; rules at https://www.anchorterminal.com/check.md; not part of the score):
  - note TC24 server: 3 of 3 tools have no outputSchema

- JSON: https://www.anchorterminal.com/api/v1/tools/cz-agents-cnb.json
- Being indexed says nothing about quality, and nobody can pay for it. Ask for a review: https://www.anchorterminal.com/builders/#claiming