calc-eval — IANA Zones MCP Tool
calc-eval
(calc eval) is one of 30 tools on the
IANA Zones
MCP server. Connect the server and your client discovers it on the handshake.
by client
How to call calc-eval from your client
- Claude Code IANA Zones calc-eval run in your project directory
- Claude Desktop IANA Zones calc-eval ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor IANA Zones calc-eval ~/.cursor/mcp.json
- VS Code IANA Zones calc-eval .vscode/mcp.json
- Zed IANA Zones calc-eval ~/.config/zed/settings.json
- Windsurf IANA Zones calc-eval ~/.codeium/windsurf/mcp_config.json
- Cline IANA Zones calc-eval ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI IANA Zones calc-eval ~/.gemini/settings.json
- Grok IANA Zones calc-eval .mcp.json (in your project root)
- ChatGPT IANA Zones calc-eval Settings → Connectors → Advanced → Developer mode
- Claude.ai IANA Zones calc-eval Settings → Connectors → Add custom connector
- LangChain IANA Zones calc-eval pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http iana-zones https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/iana-zones/mcp
Other tools on this server
- iana-zones
- utc-time
- timezone
- validate-json
- normalize-url
- inspect-robots
- domain-shape
- citation
- compatibility
- status-catalog
- web-fetch
- fetch-status
- github-repo-shape
- weather-hint
- memory-key-count
- file-path-ok
- browser-url-ok
- think-steps
- search-query-len
- hn-front-count
- lib-docs-hint
- playwright-url-ok
- figma-url-shape
- jira-key-shape
- geo-hint
- wiki-title-ok
- agent-tool-index
- people-search-index
- agent-ads-index
This list was read from the server itself, by connecting to it and calling tools/list on 24 September 2026. It is what
the server actually exposes, not what its listing claims.
Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.