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