calc-eval — Open Agent Utility Index MCP Tool
calc-eval
(calc eval) is one of 30 tools on the
Open Agent Utility Index
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 Open Agent Utility Index calc-eval run in your project directory
- Claude Desktop Open Agent Utility Index calc-eval ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor Open Agent Utility Index calc-eval ~/.cursor/mcp.json
- VS Code Open Agent Utility Index calc-eval .vscode/mcp.json
- Zed Open Agent Utility Index calc-eval ~/.config/zed/settings.json
- Windsurf Open Agent Utility Index calc-eval ~/.codeium/windsurf/mcp_config.json
- Cline Open Agent Utility Index calc-eval ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI Open Agent Utility Index calc-eval ~/.gemini/settings.json
- Grok Open Agent Utility Index calc-eval .mcp.json (in your project root)
- ChatGPT Open Agent Utility Index calc-eval Settings → Connectors → Advanced → Developer mode
- Claude.ai Open Agent Utility Index calc-eval Settings → Connectors → Add custom connector
- LangChain Open Agent Utility Index calc-eval pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http open-agent-utility-index https://agent-observatory-sensor.nolimit-observatory.workers.dev/mcpOther tools on this server
- 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.