# dev.cz-agents/cnb (npm · @czagents/cnb)

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

- Trust score: 68/100 (medium)
- Change this week: +22
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `cnb.cz-agents.dev`: 66/100, [markdown](https://verifymcp.io/servers/dev-cz-agents-cnb/cnb.md), [page](https://verifymcp.io/servers/dev-cz-agents-cnb/cnb)
- npm · `@czagents/cnb`: 68/100 (this document), [markdown](https://verifymcp.io/servers/dev-cz-agents-cnb/czagents-cnb.md), [page](https://verifymcp.io/servers/dev-cz-agents-cnb/czagents-cnb)

## Channel facts

- Registry: `npm`
- Package: `@czagents/cnb`
- Version: `0.1.5`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Supply Chain Security**: 87/100
  - No malware found by supply-chain analysis.
  - Only part of the dependency tree could be resolved (131 of 135), so this covers what we could see, not the whole tree.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (131 of 135), so this covers what we could see, not the whole tree.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 61 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 71/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 320 tokens (~106/item across 3 items; 3 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add dev-cz-agents-cnb -- npx -y @czagents/cnb
```

### Codex

```bash
codex mcp add dev-cz-agents-cnb -- npx -y @czagents/cnb
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "dev-cz-agents-cnb": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@czagents/cnb"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add dev-cz-agents-cnb --command npx --arg -y --arg @czagents/cnb
```

### Hermes

```yaml
mcp_servers:
  dev-cz-agents-cnb:
    command: "npx"
    args: ["-y", "@czagents/cnb"]
```

### Other

```json
{
  "mcpServers": {
    "dev-cz-agents-cnb": {
      "command": "npx",
      "args": [
        "-y",
        "@czagents/cnb"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-02 (score 68, +32)

- [security regression] Provenance: unverified → fail
- [security improvement] Install scripts: unverified → pass
- [security improvement] Known CVEs: unverified → partial
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] Schema quality: unverified → good
- [functional improvement] MCP protocol: unverified → pass
- [functional improvement] Stability: unverified → 0.23
- [functional improvement] License: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional] Licence: MIT

### 2026-08-01 (score 36, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-07-31 (score 21, −7)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 28, −18)

- [security regression] Malware scan: pass → unverified

### 2026-07-27 (score 46)

First indexed and scored.

## MCP tools (3)

### `get_rates` (~71 tokens)

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.

Input parameters:

- `date` (string): Optional ISO date (YYYY-MM-DD) for historical rates. Omit for latest.

### `convert` (~122 tokens)

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.

Input parameters:

- `amount` (number, required): Amount to convert.
- `date` (string): Optional ISO date for historical rates. Omit for latest.
- `from` (string, required): Source currency ISO 4217 code (e.g., "EUR", "USD", "CZK").
- `to` (string, required): Target currency ISO 4217 code.

### `get_rate` (~70 tokens)

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

Input parameters:

- `code` (string, required): ISO 4217 currency code (e.g., "EUR", "USD", "GBP").
- `date` (string): Optional ISO date for historical rate.

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/dev-cz-agents-cnb/czagents-cnb#diagnostics

## Score history

- 2026-08-03: 68
- 2026-08-02: 68
- 2026-08-01: 36
- 2026-07-31: 21
- 2026-07-30: 28
- 2026-07-28: 46
- 2026-07-27: 46

## Links

- npm package: https://www.npmjs.com/package/@czagents/cnb
- Socket report: https://socket.dev/npm/package/@czagents/cnb
- Repository: https://github.com/martinhavel/cz-agents-mcp
- Website: https://cz-agents.dev/
- Changelog RSS feed: https://verifymcp.io/servers/dev-cz-agents-cnb/czagents-cnb/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/dev-cz-agents-cnb/czagents-cnb/changelog.json
- HTML version of this page: https://verifymcp.io/servers/dev-cz-agents-cnb/czagents-cnb