# dev.cz-agents/cnb

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

- name: dev.cz-agents/cnb
- version: 0.1.7
- connection class: R0 (autonomous)
- trust: 84/100 flags: duplicate-repo
- quality: 82/100 (good)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/dev.cz-agents%2Fcnb
- tools: https://api.protogrid.dev/v1/servers/dev.cz-agents%2Fcnb/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

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


## Trust

- hygiene: 80
- liveness: 99
- freshness: 65
- provenance: 85
- drivers: +repository +dns-namespace +website +reachable +uptime-98% ~updated-140d-ago -duplicate-repo(9 names)
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 82/100 (good)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 86 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 3 of 3 tools declare readOnlyHint or destructiveHint
- fail `tools.directory_hints`: no tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: get_rates (destructiveHint, idempotentHint); convert (destructiveHint, idempotentHint); get_rate (destructiveHint, idempotentHint)
- pass `tools.token_cost`: about 489 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: no tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: 67 (weight 15)

- pass `deps.known_vulns`: no known advisory in 134 resolved packages
- fail `deps.mcp_sdk_version`: @modelcontextprotocol/sdk 1.30.1 has 1 known advisory (GHSA-6qxp-vccf-f47h); update @modelcontextprotocol/sdk to 1.31.0 or later
- pass `deps.resolvable`: @czagents/cnb@0.1.5 resolved: 134 packages

- tools: 3, about 489 tokens to load them all
- tool set hash: 79c6226cd0da17db4e8d26afea583d82
- badge: [![protogrid quality](https://protogrid.dev/badge/dev.cz-agents/cnb.svg)](https://protogrid.dev/servers/dev.cz-agents/cnb)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

_No tool definition changes recorded._

## Dependencies

- npm @czagents/cnb@0.1.5: resolved, 133 dependencies, MCP SDK @modelcontextprotocol/sdk 1.30.1
  - GHSA-6qxp-vccf-f47h (high) in `` @modelcontextprotocol/sdk@1.30.1 ``, direct, fixed in `` 1.31.0 ``, advisory summary: "MCP TypeScript SDK: OAuth client could send credentials to an authorization server chosen by the MCP server" https://osv.dev/vulnerability/GHSA-6qxp-vccf-f47h

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0.

## Remotes

- https://cnb.cz-agents.dev/mcp (streamable-http, auth none, reachable true, uptime30d 0.9830508)

## Packages

- npm @czagents/cnb@0.1.5

## Tools (3)

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