Void Editor

Void Editor is an open-source, privacy-first AI code editor (an open-source alternative to Cursor). It can connect to third-party APIs via the OpenAI-compatible protocol, so you can use any provider with an OpenAI-compatible endpoint—such as DeepSeek, OpenRouter, OneAPI, or Fast-Token.

Prerequisites

Before you begin, make sure you have:

1. API Key: Obtained from the Fast-Token platform.
2. Base URL: The base endpoint for API requests (for example https://fast-token.com/v1).
3. Model name: The exact model ID you want to use (for example deepseek-chat).

Configuration

1. Open settings

1. Launch Void Editor.
2. Click the gear icon (Settings) in the bottom-left corner.
3. Select the first option, Void's Settings.

2. Configure OpenAI-compatible protocol (most common)

Most third-party API gateways and domestic models support the OpenAI protocol.

1. On the Void settings page, find the Main Providers list.
2. Select OpenAI Compatible.
3. Enter Base URL:
   • Find the Base URL field.
   • Paste your provider's endpoint. Note: it usually must end with /v1.
4. Enter API Key:
   • Enter your key in the API Key field.

5. Add models:
   • In the models section, click Add Model.
   • Enter the real model ID from the API (for example deepseek-reasoner or claude-3-5-sonnet).

Using chat

After configuration:

1. Press Ctrl + L (Windows) or Cmd + L (macOS) to open the sidebar chat.
2. In the model dropdown above the chat input, select the third-party model you added.
3. Send a code snippet or instruction to test.

Troubleshooting

Symptom	Possible cause	Solution
Authentication Error (401)	Invalid API Key	Check that the key was copied in full, with no leading or trailing spaces.
Resource Not Found (404)	Incorrect Base URL path	Try adding or removing /v1 at the end of the URL.
Connection Timeout	Network restrictions	Check whether a proxy is required, or whether the API URL loads in your browser.
Model Not Supported	Wrong model ID	Confirm the model ID spelling matches what your provider documents exactly.

Pro tip

Void's main advantage is that it does not route requests through a relay server—it sends requests directly from your computer to the provider. If you use it on a corporate network, configure Proxy in Void's network settings; otherwise connections may fail.