LLM Gateway

N8n Integration

Connect n8n workflow automation to LLM Gateway for AI-powered workflows

n8n is a powerful workflow automation tool that can be enhanced with AI capabilities through LLM Gateway. This guide shows how to integrate LLM Gateway into your n8n workflows.

n8n workflow with LLM Gateway

Prerequisites

  • An LLM Gateway account with an API key
  • n8n instance (self-hosted or cloud)
  • Basic understanding of n8n workflows

Setup

The easiest way to use LLM Gateway with n8n is through the OpenAI node with custom configuration.

Add OpenAI Credentials

  1. In n8n, go to Settings → Credentials

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  1. Click Add Credential → OpenAI

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  1. Configure as follows:
    • API Key: Your LLM Gateway API key
    • Base URL: https://api.llmgateway.io/v1
    • Organization ID: Leave blank

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Configure OpenAI Node

  1. Add an AI Agent node to your workflow
  2. Add a Chat Model edge to the node

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  1. Configure the node to use the LLMGateway provider

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  1. Select your desired options
  • Model: Use any LLMGateway model ID (e.g., gpt-5)
  • Options: Optionally, configure LLM parameters

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Test Workflow

Finally, try running your workflow with a test prompt.

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Rate Limits

Understanding rate limits for free and paid models on LLMGateway.

Health check GET

Health check endpoint.

On this page

Prerequisites
Setup
Add OpenAI Credentials
Configure OpenAI Node
Test Workflow
N8n Integration