Actions & MCP

Extend the capabilities of Onyx Agents

Overview

Actions give Agents the ability to interact with external systems.

Onyx comes with 5 built-in Actions and allows users to configure additional ones via OpenAPI and Model Context Protocol (MCP).

The built-in Actions include:

Name	Description	Requires Config	Provider Choices
Internal Search	Search through your organization’s indexed documents and knowledge base	Yes	Built-in with swappable components
Web Search	Search the internet for real-time information and current events	Yes	Google, Serper, Exa, Firecrawl (optional)
Code Execution	Execute Python code, analyze data, and generate visualizations	No	Built-in
Image Generation	Create images from text descriptions using AI models	Yes	OpenAI, Azure OpenAI
Coding Agent Beta	Investigate and answer questions about a public GitHub codebase	Yes (disabled by default)	Built-in

Custom Actions

Onyx offers flexible options for configuring both custom Actions and their associated authentication.

Admins can choose to:

• Use a single shared authentication, giving all users the same level of access to Actions.
• Require each user to complete their own authentication flow, so Actions respect individual user permissions.

Onyx supports both token-based authentication and OAuth.

Actions Button

In the Chat input bar, Actions are grouped by the MCP server or OpenAPI schema they are registered with. Users have the flexibility to turn on/off the Actions that the Agent/LLM has access to on the fly.