lookup_company — Duck Tax MCP Tool Read-only
lookup_company
(lookup company) is one of 20 tools on the
Duck Tax
MCP server. Connect the server and your client discovers it on the handshake.
by client
How to call lookup_company from your client
- Claude Code Duck Tax lookup_company run in your project directory
- Claude Desktop Duck Tax lookup_company ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor Duck Tax lookup_company ~/.cursor/mcp.json
- VS Code Duck Tax lookup_company .vscode/mcp.json
- Zed Duck Tax lookup_company ~/.config/zed/settings.json
- Windsurf Duck Tax lookup_company ~/.codeium/windsurf/mcp_config.json
- Cline Duck Tax lookup_company ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI Duck Tax lookup_company ~/.gemini/settings.json
- Grok Duck Tax lookup_company .mcp.json (in your project root)
- ChatGPT Duck Tax lookup_company Settings → Connectors → Advanced → Developer mode
- Claude.ai Duck Tax lookup_company Settings → Connectors → Add custom connector
- LangChain Duck Tax lookup_company pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http ducktax https://ducktax.com/api/mcpOther tools on this server
- check_accounts
- dormant_figures
- totals_to_figures
- late_filing_penalty
- list_jurisdictions
- sample_accounts
- search_companies
- get_prior_year_figures
- explain_accounts
- categorise_transactions
- check_filing_extension
- draft_extension_reason
- list_saved_filings
- save_filing
- delete_filing
- track_company_deadlines
- list_tracked_companies
- untrack_company_deadlines
- server_status
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.