Letta Spreadsheet (XLSX)

Use when tasks involve creating, editing, analyzing, or formatting spreadsheets (`.xlsx`, `.csv`, `.tsv`) with formula-aware workflows, cached recalculation, and visual review.

Originally published by letta. Licensed under Apache-2.0. View original: https://github.com/letta-ai/skills/tree/main/tools/spreadsheet

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Add the free skill.ski MCP server to your .mcp.json or equivalent config file:

{
  "mcpServers": {
    "skill-ski-free": {
      "url": "https://mcp.skill.ski/free",
      "type": "http"
    }
  }
}

Once connected, this Oski is available as a callable tool at your runtime. No paywall. No sign-in required for free-tier Oskis.