calc-eval — Web Fetch MCP Tool
calc-eval
(calc eval) is one of 30 tools on the
Web Fetch
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 Web Fetch calc-eval run in your project directory
- Claude Desktop Web Fetch calc-eval ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor Web Fetch calc-eval ~/.cursor/mcp.json
- VS Code Web Fetch calc-eval .vscode/mcp.json
- Zed Web Fetch calc-eval ~/.config/zed/settings.json
- Windsurf Web Fetch calc-eval ~/.codeium/windsurf/mcp_config.json
- Cline Web Fetch calc-eval ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI Web Fetch calc-eval ~/.gemini/settings.json
- Grok Web Fetch calc-eval .mcp.json (in your project root)
- ChatGPT Web Fetch calc-eval Settings → Connectors → Advanced → Developer mode
- Claude.ai Web Fetch calc-eval Settings → Connectors → Add custom connector
- LangChain Web Fetch calc-eval pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http web-fetch https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/web-fetch/mcp
Other tools on this server
- web-fetch
- utc-time
- timezone
- validate-json
- normalize-url
- inspect-robots
- domain-shape
- citation
- compatibility
- status-catalog
- iana-zones
- 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.