Windsurf

This tutorial walks you through configuring Windsurf to use an OpenAI-compatible API to access LLMs hosted by AI Enabler. Because Windsurf does not natively support custom third-party model providers, you'll install the Roo Code extension to route requests through the AI Enabler base URL.

Overview

By the end of this tutorial, you'll be able to:

• Use AI Enabler-hosted models (for example, glm-5-fp8) inside Windsurf
• Route AI requests from Windsurf to Cast AI infrastructure via the Roo Code extension

This tutorial is intended for developers who use Windsurf IDE.

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Note

Windsurf's native BYOK (Bring Your Own Key) only supports Anthropic models. To use an OpenAI-compatible endpoint such as AI Enabler, you need the Roo Code extension described in this tutorial.

Prerequisites

Before starting, ensure you have:

1. A Cast AI API key — Generate one from the Cast AI console under AI Enabler > Overview

   

2. Windsurf IDE — Download from windsurf.com

3. Roo Code extension — Install from the Windsurf Marketplace

Step 1: Open the Roo Code panel

In Windsurf, click the Roo Code icon in the Activity Bar (left sidebar).

If this is your first time opening Roo Code, the setup wizard will appear — follow its prompts to proceed to the provider configuration screen. Choose Use without an account.

Step 2: Configure the third-party provider

In the Roo Code Choose a model provider panel:

1. Choose 3rd-party Provider from the provider list.
2. Set API Provider to OpenAI Compatible.
3. Set Base URL to https://llm.cast.ai/openai/v1.
4. Set API Key to your Cast AI API key.
5. Select glm-5-fp8 model from the list.
6. Save the configuration.

Your settings should look like this:

Step 3: Verify your configuration

1. Open the Roo Code chat panel.
2. Send a test prompt — for example, Hello. If you receive a response, the connection to AI Enabler is working.

Next steps