Codex is one of the most popular coding harnesses out there. And MCP makes the experience even better. With Workday MCP integration, you can draft, triage, summarise emails, and much more, all without leaving the terminal or the app, whichever you prefer.
- Builders & DevelopersCOMPOSIOFOR YOUGive Claude, codex, or any harness secure access to 1000+ tools
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.
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How to integrate Workday MCP with Codex
Connect Codex to Workday MCP. Request vacation days for next week, check your current absence balance, and more using natural language, with authentication handled for you.
Oauth2
Workday is a cloud-based ERP platform for HR, finance, and workforce analytics. It streamlines employee management, payroll, and business operations in a single system.
84 Tools13 Triggers
Introduction
Also integrate Workday with
Why use Composio?
Apart from a managed and hosted MCP server, you will get:
- CodeAct: A dedicated workbench that allows GPT to write its code to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
- Large tool responses: Handle them to minimise context rot.
- Dynamic just-in-time access to 20,000 tools across 1000+ other Apps for cross-app workflows. It loads the tools you need, so GPTs aren't overwhelmed by tools you don't need.
How to install Workday MCP in Codex
Run the setup command
Run this command in your terminal to add the Composio MCP server to Codex.
It will initiate the authentication in a browser window, authorize Codex to access your Composio account.
(Optional) Authenticate with OAuth
To authenticate manually, run the login command to open a browser window and authorize Codex to access your Composio account.
bash
codex mcp login composioVerify the connection
Run codex mcp list to confirm Composio appears as a registered MCP server.
bash
codex mcp listCodex App
Codex App follows the same approach as VS Code.
- Click ⚙️ on the bottom left → MCP Servers → + Add servers → Streamable HTTP:
- Fill the header and Key fields with
{ "x-consumer-api-key" = "ck_*******" }. - The Key is the Composio API key, that you can find on dashboard.composio.dev
- Click on Authenticate and authorize Codex to your Composio account and you're all set.
- Restart and verify if it's there in
.codex/config.toml
bash
[mcp_servers.composio]
url = "https://connect.composio.dev/mcp"
http_headers = { "x-consumer-api-key" = "ck_*******" }What is the Workday MCP server, and what's possible with it?
The Workday MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Workday account. It provides structured and secure access to your HR, payroll, and recruiting data, so your agent can perform actions like managing time off, retrieving employee details, tracking job postings, and analyzing interview feedback on your behalf.
- Automated time off management: Easily create new time off requests or check absence balances for yourself or others, making leave management effortless.
- Employee data and profile retrieval: Have your agent fetch profile details for the current user or any specified worker to simplify onboarding and HR processes.
- Comprehensive job posting insights: Instantly retrieve information about job postings, including descriptions and screening questionnaires, to aid recruiters and hiring managers.
- Interview feedback analysis: Let your agent pull and summarize interview feedback entries to streamline debriefs and improve hiring decisions.
- Access to holiday and leave events: Quickly get holiday schedules and leave status values for better workforce planning and scheduling.
Conclusion
You've successfully integrated Workday with Codex using Composio's MCP server. Now you can interact with Workday directly from your terminal, VS Code, or the Codex App using natural language commands.
Key benefits of this setup:
- Seamless integration across CLI, VS Code, and standalone app
- Natural language commands for Workday operations
- Managed authentication through Composio
- Access to 20,000+ tools across 1000+ apps for cross-app workflows
- CodeAct workbench for complex tool chaining
Next steps:
- Try asking Codex to perform various Workday operations
- Explore cross-app workflows by connecting more toolkits
- Build automation scripts that leverage Codex's AI capabilities
TOOLS & TRIGGERS
Supported Tools and Triggers
Every Workday action and event your agent gets out of the box.
FRAMEWORKS
How to build Workday MCP Agent with another framework
ChatGPT Work
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Antigravity
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OpenAI Agents SDK
Use Workday MCP with OpenAI Agents SDK
Claude Agent SDK
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Claude Code
Use Workday MCP with Claude Code
Claude Cowork
Use Workday MCP with Claude Cowork
Kimi Code
Use Workday MCP with Kimi Code
Grok Build
Use Workday MCP with Grok Build
Cursor
Use Workday MCP with Cursor
VS Code
Use Workday MCP with VS Code
OpenCode
Use Workday MCP with OpenCode
OpenClaw
Use Workday MCP with OpenClaw
Hermes
Use Workday MCP with Hermes
CLI
Use Workday MCP with CLI
Google ADK
Use Workday MCP with Google ADK
LangChain
Use Workday MCP with LangChain
Vercel AI SDK
Use Workday MCP with Vercel AI SDK
Mastra AI
Use Workday MCP with Mastra AI
LlamaIndex
Use Workday MCP with LlamaIndex
CrewAI
Use Workday MCP with CrewAI
Pydantic AI
Use Workday MCP with Pydantic AI
AutoGen
Use Workday MCP with AutoGen
MORE TOOLKITS
Explore Other Toolkits
Ashby
Api Key
Ashby is an applicant tracking system that handles job postings, candidate management, and hiring analytics.
Async interview
Api Key
Async interview is an on-demand video interview platform for streamlined hiring. Candidates record responses on their schedule, so employers can review anytime.
Bamboohr
Oauth2Api Key
BambooHR is a cloud-based HR management platform for small and mid-sized businesses. It streamlines employee data, HR workflows, and reporting in one easy interface.
Breathe HR
Api Key
Breathe HR is cloud-based HR software for SMEs to manage employee data, absences, and performance. It simplifies HR admin, making it easy to keep employee records accurate and up to date.
FAQ
Frequently asked questions
With a standalone Workday MCP server, the agents and LLMs can only access a fixed set of Workday tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Workday and many other apps based on the task at hand, all through a single MCP endpoint.
Yes, you can. Codex fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Workday tools.
Yes, absolutely. You can configure which Workday scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.
All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Workday data and credentials are handled as safely as possible.
Start with Workday.It takes 30 seconds.
Managed auth, hosted MCP servers, and every Workday tool your agent needs.Free to start.
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.Start building