calc-eval — Utility 12 MCP Tool
calc-eval
(calc eval) is one of 31 tools on the
Utility 12
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 12 calc-eval run in your project directory
- Claude Desktop Utility 12 calc-eval ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor Utility 12 calc-eval ~/.cursor/mcp.json
- VS Code Utility 12 calc-eval .vscode/mcp.json
- Zed Utility 12 calc-eval ~/.config/zed/settings.json
- Windsurf Utility 12 calc-eval ~/.codeium/windsurf/mcp_config.json
- Cline Utility 12 calc-eval ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI Utility 12 calc-eval ~/.gemini/settings.json
- Grok Utility 12 calc-eval .mcp.json (in your project root)
- ChatGPT Utility 12 calc-eval Settings → Connectors → Advanced → Developer mode
- Claude.ai Utility 12 calc-eval Settings → Connectors → Add custom connector
- LangChain Utility 12 calc-eval pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http util-012 https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/util-012/mcpOther tools on this server
- util-012
- 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.