---
title: OpenAI Functions Agent node documentation
description: Learn how to use the OpenAI Functions Agent of the AI Agent node in n8n. Follow technical documentation to integrate the OpenAI Functions Agent into your workflows.
contentType: [integration, reference]
priority: critical
---

# OpenAI Functions Agent node

Use the OpenAI Functions Agent node to use an [OpenAI functions model](https://platform.openai.com/docs/guides/function-calling). These are models that detect when a function should be called and respond with the inputs that should be passed to the function.

Refer to [AI Agent](/08-0-0-Workflow/integrations/builtin/cluster-nodes/root-nodes/n8n-nodes-langchain.agent/index.md) for more information on the AI Agent node itself.

```{include} ../../../../../../_snippets/integrations/builtin/cluster-nodes/use-with-chat-trigger.md

```

```{note} OpenAI Chat Model required
You must use the [OpenAI Chat Model](/08-0-0-Workflow/integrations/builtin/cluster-nodes/sub-nodes/n8n-nodes-langchain.lmchatopenai/index.md) with this agent.
```

## Node parameters

Configure the OpenAI Functions Agent using the following parameters.

### Prompt

```{include} ../../../../../../_snippets/integrations/builtin/cluster-nodes/langchain-root-nodes/prompt.md

```

### Require Specific Output Format

```{include} ../../../../../../_snippets/integrations/builtin/cluster-nodes/langchain-root-nodes/output-format.md

```

## Node options

Refine the OpenAI Functions Agent node's behavior using these options:

### System Message 

```{include} ../../../../../../_snippets/integrations/builtin/cluster-nodes/langchain-root-nodes/system-message.md

```

### Max Iterations

```{include} ../../../../../../_snippets/integrations/builtin/cluster-nodes/langchain-root-nodes/max-iterations.md

```

### Return Intermediate Steps

```{include} ../../../../../../_snippets/integrations/builtin/cluster-nodes/langchain-root-nodes/return-intermediate-steps.md

```

## Templates and examples

Refer to the main AI Agent node's [Templates and examples](/08-0-0-Workflow/integrations/builtin/cluster-nodes/root-nodes/n8n-nodes-langchain.agent/index.md#templates-and-examples) section.

## Common issues

For common questions or issues and suggested solutions, refer to [Common issues](/08-0-0-Workflow/integrations/builtin/cluster-nodes/root-nodes/n8n-nodes-langchain.agent/common-issues.md).