xlsx-for-ai is an MCP server giving Codex CLI agents 39 production-grade tools for Excel (.xlsx) files: read, write, diff, doctor, macros, pivots, charts, conditional formats, comments, protection, plus stateful supervisor sessions.

Architecture: thin npm client (~200 lines) over a hosted API at https://api.xlsx-for-ai.dev. Engine runs server-side. Free tier (10,000 calls/month, no email) auto-registers with anonymous UUID on first use.

Install

npm install -g xlsx-for-ai

Codex CLI config

Add to your Codex MCP config (location varies by version):

{
  "mcpServers": {
    "xlsx-for-ai": {
      "command": "xlsx-for-ai-mcp"
    }
  }
}

Verify: codex --list-tools should show 39 xlsx_* tools.

Links

• GitHub: https://github.com/senoff/xlsx-for-ai
• npm: https://www.npmjs.com/package/xlsx-for-ai
• MCP Registry: registry.modelcontextprotocol.io (server: io.github.senoff/xlsx-for-ai)
• Desktop Extension (.mcpb) also available for Claude Desktop one-click install.

License: MIT. Built for FP&A, finance teams, banking analysts, and any agent that touches spreadsheets.