Aider
Terminal pair programmer · Chat Completions
Aider routes through LiteLLM, so KoRouter connects as a generic OpenAI-compatible endpoint: two exports and a model prefix.
Base URL · OpenAI-compatible
https://korouter.ai/v1
Plus an API key from Keys and a bare model ID from Models. Every price on the catalog sits below the provider's official rate — pay as you go.
Setup
Aider talks to models through LiteLLM, so KoRouter connects as a generic OpenAI-compatible endpoint: export the two variables and prefix the model with openai/.
export OPENAI_API_BASE="https://korouter.ai/v1"
export OPENAI_API_KEY="sk-your-key"
aider --model openai/model-nameVerify
Aider prints the connected model and endpoint on startup. Ask it anything, then check Usage for the call.
If it fails
- wrong-looking model name — the
openai/prefix is local routing for LiteLLM; the request body carries the bare ID after the slash. - unknown-model cost warnings — cosmetic — aider does not know custom catalogs. Silence them with
--no-show-model-warnings. - 401 despite a correct key — export the variables in the same shell that launches aider, or add them to your shell profile.
Troubleshooting
The failures below account for nearly every unsuccessful first connection, whatever the tool.
| Status | Symptom | Fix |
|---|---|---|
| 401 | Key missing, mistyped, or deleted | Re-copy the key from Keys and confirm which header your tool sends — Authorization: Bearer or x-api-key. |
| 403 | No credits on the account (INSUFFICIENT_BALANCE) | Add credits first. Verify buttons and test prompts inside tools fire real requests. |
| 404 | Model not found | Send the bare model ID exactly as listed on Models — no provider/ prefix in the request body. |
| 429 | Concurrency or key spend limit reached | Lower parallel requests, or raise the key's spend limit, then retry with backoff. |
The full status-code table, retry guidance, and error envelopes are in Errors & limits. Still stuck? Email support@korouter.ai with the tool name, the model ID, and the exact error text.
Other tools
Free to sign up, no monthly fee — pay as you go with credits.