calc-eval — Utility 139 MCP Tool
calc-eval
(calc eval) is one of 31 tools on the
Utility 139
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 Utility 139 calc-eval run in your project directory
- Claude Desktop Utility 139 calc-eval ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor Utility 139 calc-eval ~/.cursor/mcp.json
- VS Code Utility 139 calc-eval .vscode/mcp.json
- Zed Utility 139 calc-eval ~/.config/zed/settings.json
- Windsurf Utility 139 calc-eval ~/.codeium/windsurf/mcp_config.json
- Cline Utility 139 calc-eval ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI Utility 139 calc-eval ~/.gemini/settings.json
- Grok Utility 139 calc-eval .mcp.json (in your project root)
- ChatGPT Utility 139 calc-eval Settings → Connectors → Advanced → Developer mode
- Claude.ai Utility 139 calc-eval Settings → Connectors → Add custom connector
- LangChain Utility 139 calc-eval pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http util-139 https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/util-139/mcpOther tools on this server
- util-139
- utc-time
- timezone
- validate-json
- normalize-url
- inspect-robots
- domain-shape
- citation
- compatibility
- status-catalog
- iana-zones
- 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.