aider/website/docs/dotenv.md

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Configuration	900	Using a .env file to store LLM API keys for aider.

Storing LLM params in .env

You can use a .env file to store API keys and other settings for the models you use with aider. You currently can not set general aider options in the .env file, only LLM environment variables.

{% include special-keys.md %}

Aider will look for a .env file in the root of your git repo or in the current directory. You can give it an explicit file to load with the --env-file <filename> parameter.

Here is an example .env file:

OPENAI_API_KEY=<key>
ANTHROPIC_API_KEY=<key>
GROQ_API_KEY=<key>
OPENROUTER_API_KEY=<key>

AZURE_API_KEY=<key>
AZURE_API_VERSION=2023-05-15
AZURE_API_BASE=https://example-endpoint.openai.azure.com

OLLAMA_API_BASE=http://127.0.0.1:11434