Open WebUI Integration

Open WebUI is a self-hosted, feature-rich web interface for interacting with large language models. It supports multiple providers including OpenAI, Ollama, and any OpenAI-compatible API, with built-in user management, chat history, and model switching.

Open WebUI's connection manager lets you add any OpenAI-compatible endpoint, making it simple to integrate LLM API and access all available models.

Prerequisites

An LLM API account with an API key
Open WebUI installed or accessible

Setup

Get Your LLM API Key

Log in to your LLM API dashboard
Click Create Key to Start
Copy your new API key immediately — it will only be shown once
Store the key securely (e.g., in a password manager or .env file)

LLM API is an OpenAI-compatible gateway that gives you access to dozens of AI models through a single API key and endpoint.

Configure LLM API in Open WebUI

Open your Open WebUI instance in a browser.
Navigate to Admin Settings (⚙️ icon) → Connections → OpenAI → Manage.
Click the ➕ (Add New Connection) button.
Enter the following details:
- URL: https://api.llmapi.ai/v1
- API Key: paste the key you copied from app.llmapi.ai/api-keys
Click "Save" to store the credentials.
LLM API models will now appear in the model dropdown when starting a new chat.

Test the Integration

Verify that Open WebUI can successfully communicate with LLM API by sending a test request. All requests will now be routed through LLM API.

You can leave the Model IDs field empty for auto-detection, or specify a list of model IDs to limit which models appear in the dropdown.

Benefits of Using LLM API with Open WebUI

Multi-Provider Access: Use models from OpenAI, Anthropic, Google, and more through a single API
Cost Control: Track and limit your AI spending with detailed usage analytics
Unified Billing: One account for all providers instead of managing multiple API keys
Caching: Reduce costs with response caching for repeated requests

View all available models on the models page.