io.github.chrischall/workday-mcp

workday-mcp

Read-only MCP server for Workday. Reads your Workday org chart, worker profiles, pay, benefits, performance, and any task or data card, 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

Tool	What it does
workday_get_apps	List your Workday apps with launchable task ids — the discovery entry point
workday_open_app	Open an app by name ("Talent and Performance", "Absence") and follow it down to the child cards holding its real content
workday_get_task	Read any task/data card by id or path → fields, full table rows, references, related tasks, export links. expand: true crawls hub pages
workday_get_org_chart	Your reporting chain — each person with title, location, report count, and a profileUri to drill into
workday_get_worker	A worker's profile: the catalog of everything readable about them (9 sections, ~40 named tasks)
workday_get_worker_task	Open one named item from that catalog — "Compensation", "Performance Reviews", "Management Chain"
workday_get_my_profile	The same catalog, for yourself
workday_fetch	Raw .htmld read with secrets redacted — the escape hatch for pages the parser doesn't model yet
workday_graphql	Read-only GraphQL against Workday's PEX surface (mutations refused). The only route to Inbox / search
workday_healthcheck	Verify the bridge + session end-to-end with an actionable hint

The parser understands seven Workday page families — data cards, grids (real tables, with chunking and export links), form-style detail pages, worker profiles, org charts, app hubs, and report prompt forms — and labels each page with its kind. See docs/WORKDAY-API.md.

Manager quick start

workday_get_org_chart                                   → who reports where, with profileUris
workday_get_worker         { worker: "<profileUri>" }   → that person's full catalog
workday_get_worker_task    { worker: "…", task: "Compensation" }
workday_open_app           { app: "talent" }            → a whole app hub, crawled

All ids are discovered at runtime from your own app menu and org chart — nothing tenant-specific is hardcoded, so this works on any Workday tenant.

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.