Aider

Point Aider at CodexIn with its OpenAI API key and base URL options.

Setup progress
Finish these once. After that, CodexIn works like a prepaid OpenAI-compatible endpoint.
x
Have usable credits
Create or select an API key
Copy the setup command
Send the first request
Sign in to personalize
Install in your tool
Pick the coding tool and operating system, then copy the exact command.
PowerShell writes config files into C:\Users\<username>\.codex
Aider
python -m pip install aider-install
aider-install
$configPath = Join-Path $env:USERPROFILE ".aider.conf.yml"
$utf8NoBom = New-Object System.Text.UTF8Encoding $false
[System.IO.File]::WriteAllText($configPath, @'
model: openai/gpt-5.5
openai-api-base: https://api-get-started.preview.codexin.lol/v1
openai-api-key: ci_live_YOUR_KEY_HERE
reasoning-effort: xhigh
'@, $utf8NoBom)
Write-Host "Aider config written to $configPath"
aider
Uses Aider's OpenAI-compatible base URL option.
Start with the openai/ model prefix when using a custom OpenAI-compatible endpoint.
Discord