Why does Cline fail to connect to the API?

Ensure your API Base URL is exactly `https://api.apibox.cc/v1`. You must select 'OpenAI Compatible' as your provider, not Anthropic.

How do I switch models in Cline?

In the Cline settings panel, keep the provider as OpenAI Compatible and type your desired model into the Model ID field (e.g., `claude-sonnet-4-6` or `gpt-5`).

Cline VSCode Extension Setup: Unblocked AI Coding with APIBox

One: Overview

Cline (formerly Claude Dev) is one of the most powerful AI coding extensions for VSCode. It can write, edit, and debug code directly inside your workspace. By routing the API through APIBox, you can securely access top models like Claude 4.6, GPT-5, and DeepSeek without VPNs or region locks.

Two: Installation Steps

1. Install the Cline Extension

Open VSCode and navigate to the Extensions view (Ctrl+Shift+X or Cmd+Shift+X). Search for "Cline" and look for the official version with the blue verified tick. Click Install.

Once installed, click the new Cline icon in your left sidebar to open the assistant.

Alternatively, install it directly from the terminal:

code --install-extension saoudrizwan.claude-dev

2. Get Your API Key

Head over to the APIBox Console and generate a new API Key.

Tip: APIBox charges approximately 1/7 of the official provider rates and gives you access to a massive catalog of models through a single, unified interface.

3. Configure Cline to use APIBox

Open the Cline panel in VSCode and click the Settings (gear icon) at the top right.

Under the API Provider dropdown, select OpenAI Compatible.

Fill in the fields exactly as follows:

Base URL: https://api.apibox.cc/v1
API Key: Paste your APIBox Key here
Model ID: Enter the exact name of the model you want to use. Popular choices include:
- claude-sonnet-4-6 (Best balance of speed and coding intelligence)
- gpt-5
- gemini-2.5-pro
- deepseek-v3

Click Done or Save.

Three: Troubleshooting

❌ Extension fails with “Invalid API Key” or Auth Error

Cause: You selected the wrong provider or copied the key incorrectly. Fix: Do not choose the “Anthropic” or “OpenAI” options from the dropdown. You must select “OpenAI Compatible”. Ensure no extra spaces were copied with the key.

❌ Extension says “Model Not Found”

Cause: The Model ID is incorrect or not supported by the platform. Fix: Model names are case-sensitive and must match APIBox’s exact routing names. For example, use claude-sonnet-4-6, not claude-3-5-sonnet. Check the APIBox dashboard for the full supported model list.

❌ API Connection Failed / Timeout

Cause: The Base URL is missing the /v1 suffix. Fix: Ensure the Base URL is exactly https://api.apibox.cc/v1.