calc-eval — Utility 151 MCP Tool
calc-eval
(calc eval) is one of 31 tools on the
Utility 151
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 151 calc-eval run in your project directory
- Claude Desktop Utility 151 calc-eval ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor Utility 151 calc-eval ~/.cursor/mcp.json
- VS Code Utility 151 calc-eval .vscode/mcp.json
- Zed Utility 151 calc-eval ~/.config/zed/settings.json
- Windsurf Utility 151 calc-eval ~/.codeium/windsurf/mcp_config.json
- Cline Utility 151 calc-eval ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI Utility 151 calc-eval ~/.gemini/settings.json
- Grok Utility 151 calc-eval .mcp.json (in your project root)
- ChatGPT Utility 151 calc-eval Settings → Connectors → Advanced → Developer mode
- Claude.ai Utility 151 calc-eval Settings → Connectors → Add custom connector
- LangChain Utility 151 calc-eval pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http util-151 https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/util-151/mcpOther tools on this server
- util-151
- 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.