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How to connect Personio MCP with ChatGPT

Connect ChatGPT to Personio MCP. List employees on parental leave, update job title for jane doe, and more using natural language, with authentication handled for you.

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Personio is an HR platform for managing employee records, attendance, absences, projects, and documents. It centralizes HR data and streamlines workforce administration for teams and HR leaders.

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How to connect Personio MCP with ChatGPT

ChatGPT can take action across your apps and files, stay with a project for hours, and turn a goal into finished materials like sheets, slides, and docs, not just answers.

In this guide, I will explain the easiest and most secure way to connect your Personio account to ChatGPT via Composio Connect, so it can read people records, query attendance and absences, update your employee attributes, fetch employee documents, and list project assignments through natural language commands without ever putting your account credentials at risk.

Also integrate Personio with

Claude CoworkHermes

Why use Composio over default connectors?

  • Apps with read and write access. Default connectors mostly can read your data. Composio's Personio integration lets ChatGPT take actions like creating drafts, sending updates, labeling records, and more.
  • 1,500+ SaaS toolkits out of the box. Composio gives you instant access to a vast catalog of pre-built connectors, from Gmail and Slack to Notion, Linear, and Salesforce.
  • One MCP server for every app. Connect any of your applications on demand through a single endpoint, rather than juggling a separate server for each app.
  • Smart, context-aware tool loading. Unlike traditional MCP servers that dump every available tool into the LLM context window, Composio searches for and loads only the tools relevant to the task at hand.
  • Cross-app automation. Chain actions across multiple apps in a single run - fetch a thread, summarize it in Notion, and post highlights to Slack without leaving the conversation.

Prerequisites

Note: Composio connects through OAuth. You will be asked to sign in and approve specific permissions. Review the permission screen carefully if you are using a work account.

Step-by-step: Connect Personio to ChatGPT

1. Install the Composio plugin

Click the button. ChatGPT opens the Composio plugin page. Click Install plugin.

Install in ChatGPT

Composio plugin page in ChatGPT with the Install plugin button

You can also find it inside ChatGPT: go to Settings, open Plugins, search the marketplace for Composio, and click Install plugin.

2. Authenticate

After you install, ChatGPT asks you to authenticate with Composio. Log in and click Allow access to authorize ChatGPT to use your Composio account.

Composio login and Allow access screen for ChatGPT

3. Start using Composio

That is it. Composio tools are now available in ChatGPT. Type @Composio followed by your request, for example @Composio find unread Personio messages and summarize them, and it will run the actions you authorize. On first use it asks you to authorize Personio.

Option 2: Add Composio as an MCP server

If you cannot use the plugin marketplace, add Composio as a custom MCP server instead.

1. Open the MCP settings

In ChatGPT, go to Settings and open the Plugins section. Inside the Plugins page, click the MCP tab.

ChatGPT settings showing the Plugins page with the MCP tab selected

2. Add the server

Click Add server. In the Name field enter Composio, for Type select Streamable HTTP, and in the URL field paste the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
ChatGPT Add server dialog with the name Composio, type Streamable HTTP, and the Composio MCP URL

Then click Save. The Composio server now appears in your MCP plugins list.

ChatGPT Plugins page showing the Composio MCP server added to the list

3. Authenticate

Click Authenticate on the Composio entry, log in via Composio, and click Allow access. Composio tools are then available in ChatGPT the same way as with the plugin.

What you can do after connecting Personio

  • List employees on parental leave
  • Update job title for Jane Doe
  • Get attendance summary for last month

Security + privacy notes (important)

  • Use least-privilege access: Only grant permissions you actually need.
  • Review OAuth permissions before approving: Make sure requested scopes match what you expect Composio and ChatGPT to do.
  • Keep write actions human-reviewed: For actions like sending messages, creating labels, or editing drafts, keep manual confirmation enabled.
  • Be careful with sensitive data: Avoid using this setup with highly sensitive information unless allowed by your personal, company, or client policies.
TOOLS

Supported Tools

Every Personio action and event your agent gets out of the box.

List Absence Periods

Return v2 absence periods filtered by person, absence type, IDs, date-time bounds, or update time.

List Absence Types

Return the v2 absence types configured for the company, including IDs, names, categories, and units.

List Attendance Periods

Return v2 attendance periods filtered by people, projects, status, attribution dates, time bounds, or update time.

List Document Categories

Return the legacy Personnel Data document categories and IDs used to classify or filter company documents.

List Documents

Return v2 document metadata for one owner, optionally filtered by category and creation date; this does not download document contents.

List Employee Attributes

Return the standard and custom employee attributes readable by the connected integration, including the keys accepted by list employee records.

List Employee Records

Return legacy Personnel Data employee records with selectable standard or custom attributes and incremental-update filtering; use List Persons for ordinary v2 identity lookup.

List Person Employments

Return employment records for one v2 person, including status, type, and working-hours details.

List Persons

Return current v2 person summaries, optionally filtered by identity, status, or creation and update times; use employee records instead when custom Personnel Data attributes are needed.

List Projects

Return v2 time-tracking projects filtered by IDs, names, codes, status, hierarchy, or top-level membership.

FRAMEWORKS

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Use Personio MCP with Hermes

FAQ

Frequently asked questions

With a standalone Personio MCP server, the agents and LLMs can only access a fixed set of Personio tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Personio and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. ChatGPT 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 Personio tools.

Yes, absolutely. You can configure which Personio 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 Personio data and credentials are handled as safely as possible.

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