Langflow Integration

Langflow is a visual framework for building multi-agent and RAG applications. It provides a drag-and-drop interface for connecting LLM components, data sources, and tools into complex AI workflows.

Langflow's model components support OpenAI-compatible endpoints.

Prerequisites

An LLM API account with an API key
Langflow 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 Langflow

Open Langflow in your browser.
Drag an "OpenAI" or "ChatOpenAI" component onto the canvas.
Click the component and configure:
- API Key: paste the key you copied from app.llmapi.ai/api-keys
- Base URL: https://api.llmapi.ai/v1
- Model Name: openai/gpt-4o
Connect the component to your flow and run.

Test the Integration

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

Langflow's visual interface makes it easy to swap models by changing the Model Name field.

Benefits of Using LLM API with Langflow

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.