Workday MCP Server

workday-mcp

Read-only MCP server for Workday. Fetches your Workday tasks and data cards — pay, benefits, compensation — and returns them as structured JSON. Every request routes through your own signed-in *.myworkday.com tab via the fetchproxy browser extension, reusing your existing SSO-authenticated session.

⚠️ Workday gives employees no personal API. This server reads the same internal *.htmld endpoints the Workday web app calls, dispatched through your own signed-in browser tab. It is read-only and touches only your own data. Check your employer's acceptable-use policy. Use at your own discretion.

🤖 This project was developed and is maintained by AI (Claude Code).

Why a bridge instead of the official API?

The official Workday REST/SOAP API requires a tenant administrator to register an OAuth API client + Integration System User — an employee can't self-provision it. Tenants also sit behind corporate SSO (Ping/Okta/Entra) with MFA, so there's no server-side login. The only surface an employee can reach for their own data is their live browser session, which is what this server relays.

Install

See SKILL.md for full setup. In brief:

{
  "mcpServers": {
    "workday": {
      "command": "npx",
      "args": ["-y", "workday-mcp"],
      "env": { "WORKDAY_TENANT": "your-tenant-slug" }
    }
  }
}

Then install the fetchproxy extension and sign into Workday in your browser.

Tools

Development

npm install
npm test          # vitest
npm run build     # tsc --noEmit + esbuild bundle → dist/bundle.js

The widget-tree parser (src/parse.ts) is the durable core; see docs/WORKDAY-API.md for the captured endpoint shapes and schema. License: MIT.