This documentation is provided for informational purposes only and demonstrates how to configure and use our API with third-party AI chat interfaces. Any third-party software, websites, or services mentioned are not operated, controlled, or endorsed by us.

Introduction to Claude Code

Claude Code is an agentic coding tool that lives in your terminal, understands your codebase, and helps you code faster by executing routine tasks, explaining complex code, and handling git workflows - all through natural language commands. Claude Code Key Features:

Autonomous Action: Reads/writes files, runs terminal commands, and fixes bugs directly.
Full Context: Automatically understands the entire codebase without manual copy-pasting.
Safety & Control: Supports one-click rollbacks and requires manual approval for key actions.
Tool Integration: Supports custom complex workflows via SKILL.md.

Step

Install Claude Code

If you have previously installed Claude Code, please run the following command in the terminal to update to the latest version. This may require administrator privileges.

claude update

Need a one-click configuration tool? Try RouterLink Starter, officially released by RouterLink.

CLI - Node.js
CLI - Native Install
VS Code Extension
Desktop App

RouterLink has already prepared installation scripts for you. You can run the following commands for one-click installation of Node.js and the corresponding coding agent.macOS, Linux, WSL:

curl -fsSL https://install.routerlink.ai/claude.sh | bash

Windows PowerShell:

irm https://install.routerlink.ai/claude.ps1 | iex

Windows users may be unable to run scripts because of digital signature requirements. Please run the following command:
Windows PowerShell:
Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy RemoteSigned -Force

Or, you can choose to manually install Node.js and the corresponding coding agent:Install the newest LTS version of Node.js, and then use npm to install it globally in the terminal:

npm install -g @anthropic-ai/claude-code

macOS, Linux, WSL:

curl -fsSL https://claude.ai/install.sh | bash

Windows PowerShell:

irm https://claude.ai/install.ps1 | iex

Windows CMD:

curl -fsSL https://claude.ai/install.cmd -o install.cmd && install.cmd && del install.cmd

If you see The token '&&' is not a valid statement separator, you’re in PowerShell, not CMD. If you see 'irm' is not recognized as an internal or external command, you’re in CMD, not PowerShell. Your prompt shows PS C:\ when you’re in PowerShell and C:\ without the PS when you’re in CMD.Native Windows setups require Git for Windows. Install it first if you don’t have it. WSL setups do not need it.Native installations automatically update in the background to keep you on the latest version.

Point Claude Code at RouterLink

CLI — settings.json
VS Code Extension
Desktop App

Claude Code officially supports managing persistent configuration through the settings system. For daily use, it is recommended to prioritize writing configurations into settings.json. Shell or system environment variables are better suited for temporary switching, CI scenarios, or as a fallback when encountering known issues in the current version.Edit or create the settings.json file
On macOS & Linux: ~/.claude/settings.json
On Windows: C:\Users\<USERNAME>\.claude\settings.jsonMake sure to replace <ROUTERLINK_API_KEY> with your API key from RouterLink. When replacing it, do not keep the angle brackets < and >.

{
  "env": {
    "ANTHROPIC_AUTH_TOKEN": "<ROUTERLINK_API_KEY>",
    "ANTHROPIC_BASE_URL": "https://router-link.world3.ai/api",
    "API_TIMEOUT_MS": "3000000",
    "CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC": "1",
    "ANTHROPIC_DEFAULT_HAIKU_MODEL": "claude-haiku-4-5",
    "ANTHROPIC_DEFAULT_SONNET_MODEL": "claude-sonnet-4-6",
    "ANTHROPIC_DEFAULT_OPUS_MODEL": "claude-opus-4-8",
    "ANTHROPIC_DEFAULT_FABLE_MODEL": "claude-fable-5"
  }
}

Open your VS Code settings.json.

Click “Edit in settings.json” under Environment Variables.

Add the following content. Make sure to replace with the <ROUTERLINK_API_KEY> obtained from RouterLink Key.

{
    "claudeCode.disableLoginPrompt": true,
    "claudeCode.preferredLocation": "panel",
    "claudeCode.environmentVariables": [
    {"name":"ANTHROPIC_AUTH_TOKEN","value":"<ROUTERLINK_API_KEY>"},
    {"name":"ANTHROPIC_BASE_URL","value":"https://router-link.world3.ai/api"},
    {"name":"ANTHROPIC_DEFAULT_HAIKU_MODEL","value":"claude-haiku-4-5"},
    {"name":"ANTHROPIC_DEFAULT_SONNET_MODEL","value":"claude-sonnet-4-6"},
    {"name":"ANTHROPIC_DEFAULT_OPUS_MODEL","value":"claude-opus-4-7"}
    ]
}

First launch

CLI
VS Code Extension
Desktop App

Navigate to your code working directory and run the claude command in the terminal to start using Claude Code.

claude

When using Claude Code for the first time, you may be forced to log in to an Anthropic account.

Please follow the steps below to skip this process:
Open or create the .claude.json file in the user’s home directory. The specific paths are as follows: macOS / Linux: ~/.claude.json Windows: C:\Users\<USERNAME>\.claude.json
Set the value of the hasCompletedOnboarding field to true.

{
  "hasCompletedOnboarding": true
}

Save the file, then run claude again in the terminal.After launching, choose to trust Claude Code to access the files in the folder, as shown below:

Done! You can now use Claude Code normally.

Enable Virtualization on WindowsCowork runs in a virtualized environment. On Windows, you must enable the Virtual Machine Platform feature first; otherwise, Cowork will not work properly after installation.Open PowerShell as an administrator and run the following command, then restart your computer:

Enable-WindowsOptionalFeature -Online -FeatureName VirtualMachinePlatform -All -NoRestart

Open the Claude Desktop App, and you’re ready to start using it! 🚀

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Troubleshooting

No response after entering a prompt / “You don’t have enough $WAI” error

Make sure your API input is correct. Due to the high token consumption of Anthropic models, the daily free quota may not support this model. Please top up your balance.

How can I switch to another model?

Claude Code only supports the Anthropic-format API.
Go to https://routerlink.ai/models. Click on the model, set the API Format to “Anthropic,” and locate the model field in the code block.Copy the model name from the model field and replace it in the settings.json file above.

Open a new terminal window. Run claude to start Claude Code. Then enter /model to switch the model, and finally type /status to verify the model status.

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Manual configuration changes not taking effect

If you have manually edited the ~/.claude/settings.json file but the changes are not applied, please try the following:

Close all Claude Code windows. Open a new terminal window and run claude again to restart.
If the issue persists, try deleting the ~/.claude/settings.json file and reconfigure the environment variables. Claude Code will automatically generate a new configuration file.
Make sure the JSON format of the configuration file is correct. Check for issues such as incorrect variable names, missing commas, or extra commas. You can use an online JSON validator to verify the file.

How can I upgrade Claude Code?

Enter the following command in the terminal:

claude update

For more information

Please check the official documentation.

​Introduction to Claude Code

​Step

​Troubleshooting

Introduction to Claude Code

Step

Troubleshooting