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