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What is an Integration?

An AG-UI integration makes your agent speak the AG-UI protocol. This means your agent can work with any AG-UI compatible client application - like chat interfaces, copilots, or custom AI tools.

Think of it like adding a universal translator to your agent. Instead of building custom APIs for each client, you implement AG-UI once and instantly work with any compatible application.

Agents integrating with AG-UI can:

  • Stream responses - Real-time text that appears as it’s generated
  • Call client-side tools - Your agent can use functions and services defined by clients
  • Share state - Your agent’s state is bidirectional shared state
  • Execute universally - Integrate with any AG-UI compatible client application
  • And much more! - Check out the full specification here.

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When should I make any integration?

If the integration you’re looking for is not listed on our integrations page, you’ll need to make an integration. We’ve got a few guides on this below!

However, if you’re looking to utilize an existing integration (like LangGraph, CrewAI, Mastra, etc.), you can skip this step and go straight to building an application.

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Types of Integrations

So you’ve decided you need an integration! Great, there are two main ways to implement an AG-UI integration:

Server Implementation

Emit AG-UI events directly from your agent or server.

Middleware Implementation

Translate existing protocols and applications to AG-UI events.

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When to use a server implementation

Server implementations allow you to directly emit AG-UI events from your agent or server. If you are not using an agent framework or haven’t created a protocol for your agent framework yet, this is the best way to get started.

Server implementations are also great for:

  • Building a new agent frameworks from scratch
  • Maximum control over how and what events are emitted
  • Exposing your agent as a standalone API

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When to use a middleware implementation

Middleware is the flexible option. It allows you to translate existing protocols and applications to AG-UI events creating a bridge between your existing system and AG-UI.

Middleware is great for:

  • Taking your existing protocol or API and translating it universally
  • Working within the confines of an existing system or framework
  • When you don’t have direct control over the agent framework or system