VS Code extensions

Prerequisites

You need VS Code.

1. Install

Install VS Code, then find and install both official extensions from the Extensions view:

Codex – OpenAI's coding agent
Claude Code for VS Code

Find the official Codex extension in the VS Code Marketplace. Red boxes mark the Extensions view and correct result; the arrow points to Install.

Find the official Claude Code extension in the VS Code Marketplace. Red boxes mark the Extensions view and correct result; the arrow points to Install.

2. Configure

Codex extension

The extension reads the local Codex config.toml. On Windows, open %USERPROFILE%\\.codex\\config.toml:

$codexHome = if ($env:CODEX_HOME) { $env:CODEX_HOME } else { Join-Path $HOME ".codex" }
New-Item -ItemType Directory -Force -Path $codexHome | Out-Null
notepad (Join-Path $codexHome "config.toml")

On macOS, open ~/.codex/config.toml:

CODEX_DIR="${CODEX_HOME:-$HOME/.codex}"
mkdir -p "$CODEX_DIR"
open -e "$CODEX_DIR/config.toml"

Preserve other settings and merge:

config.toml

model_provider = "GetRun"

[model_providers.GetRun]
name = "GetRun"
base_url = "https://api.get-apikey.com/v1"
wire_api = "responses"
requires_openai_auth = true
experimental_bearer_token = "sk-xxxxx-xxx"

Claude Code extension

The extension reads ~/.claude/settings.json. On Windows, use:

$claudeDir = Join-Path $HOME ".claude"
New-Item -ItemType Directory -Force -Path $claudeDir | Out-Null
notepad (Join-Path $claudeDir "settings.json")

On macOS, use:

mkdir -p "$HOME/.claude"
open -e "$HOME/.claude/settings.json"
chmod 600 "$HOME/.claude/settings.json"

Merge the following env object:

settings.json

{
  "env": {
    "ANTHROPIC_BASE_URL": "https://api.get-apikey.com",
    "ANTHROPIC_AUTH_TOKEN": "sk-xxxxx-xxx",
    "ANTHROPIC_MODEL": "YOUR_MODEL",
    "ANTHROPIC_DEFAULT_HAIKU_MODEL": "YOUR_MODEL",
    "ANTHROPIC_DEFAULT_SONNET_MODEL": "YOUR_MODEL",
    "ANTHROPIC_DEFAULT_OPUS_MODEL": "YOUR_MODEL"
  }
}

Merge this into the VS Code user settings.json:

{
  "claudeCode.disableLoginPrompt": true
}

3. Restart

Fully quit and reopen VS Code, then open the corresponding extension sidebar.

4. Confirm a reply

Send Reply only with OK in the Codex or Claude Code sidebar. The setup is complete when the extension replies OK.