GatewayCoding Agents

Aider (gateway)

Route Aider’s LLM calls through the Respan gateway for automatic logging, caching, and model switching. Aider supports OpenAI-compatible endpoints, so only your RESPAN_API_KEY is needed.

Setup

1

Install Aider

$python -m pip install aider-install && aider-install
2

Set environment variables

Add to your shell profile (.bashrc, .zshrc, or PowerShell $PROFILE):

$export OPENAI_API_BASE="https://api.respan.ai/api"
$export OPENAI_API_KEY="YOUR_RESPAN_API_KEY"

No separate OpenAI API key needed. The Respan gateway handles provider authentication.

3

Run Aider

Prefix the model with openai/ so Aider uses the OpenAI-compatible route:

$aider --model openai/gpt-4o

All LLM calls now route through Respan.

Switch models

Change the --model flag to use any of the 250+ models available through the gateway. Keep the openai/ prefix so calls go through the OpenAI-compatible endpoint.

$aider --model openai/gpt-4o
$aider --model openai/claude-sonnet-4-5-20250929
$aider --model openai/gemini-3.5-flash

See the full model list.