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