Connect GCIS (Taiwan Company Registration) to Codex
Query GCIS (Taiwan Company Registration) directly from Codex. Arlet links the two through one MCP connection and takes care of API keys.
This server connects your AI client to Taiwan's company registration open data, published by the Ministry of Economic Affairs (GCIS). It is the authoritative record of whether a Taiwanese company exists, who is responsible for it, and whether it is still in good standing - the Taiwan piece of a cross-border counterparty due-diligence workflow.
Key features:
- search_companies: search by Chinese company-name keyword. Active companies (æ ¸å‡†è¨ç«‹) only by default, with an option to include dissolved or withdrawn ones.
- get_company: the registration record for one 8-digit unified business number (統一編號): official name, status, responsible person, authorized and paid-in capital, registered address, registration authority, establishment date and last change date.
Dates arrive in the ROC (Minguo) calendar and are converted to the Gregorian calendar automatically. The unified business number is the same identifier the TWSE server returns for listed companies, so the two join cleanly: find a listed company there, verify its registration here.
No API key is needed. Note that company names in the registry are official Chinese names - search in Chinese for best results.
How to connect GCIS (Taiwan Company Registration) to Codex
- 1
In the Arlet dashboard, open Data tools, find GCIS (Taiwan Company Registration) and switch it on. No API key setup is needed.
- 2
In your terminal, run codex mcp add arlet --url https://mcp.arlet.dev/mcp/ to add Arlet as an MCP server.
- 3
Codex detects OAuth support and opens your browser. Sign in with Google and click Allow on the consent screen.
- 4
Once connected, both the CLI and the IDE extension can call Arlet tools (the configuration is shared).
If the browser does not open, run codex mcp login arlet to redo the authentication.