CLI Tools

Aider

Use Aider chat and code editing through an OpenAI-compatible endpoint.

ConfigurableOpenAI Chat CompletionsDocs checked 2026-09-18

The vendor documents custom endpoints. Check model capabilities and verify the connection.

On this page

Before you begin

Set up Python and install aider-chat using the installation guide. Evaluate editing quality separately for your chosen model.

Have an A2Agent API key ready and copy an accessible model ID from the catalog. Replace every placeholder, back up existing settings and keep keys out of repositories.

Manage API keys Browse models

Setup

File contents are usually shared; switching OS changes commands and paths. For WSL on Windows, select macOS / Linux.

01Install Aider
Follow the official installer instructions, then check that aider --version works.
Open official documentation
02Configure and launch
Aider uses OPENAI_API_BASE. The openai/ prefix belongs to the client; append the actual model ID.
Shell
```
export OPENAI_API_BASE='https://a2agent.me/v1'
export OPENAI_API_KEY='YOUR_A2AGENT_API_KEY'
aider --model openai/YOUR_MODEL_ID
```

Capabilities and limits

Unknown models may lack context and price metadata. Check the model catalog; Aider estimates are not the billing record.
Editing formats depend on model capabilities. Check generated diffs in a test repository first.

Verify the connection

Replace every placeholder and run locally. Expect JSON containing OK. Then start a new client conversation, test one read-only tool call separately, and confirm the requests in A2Agent usage records. This test incurs a small amount of model usage.

Shell

curl --fail-with-body --silent --show-error --max-time 60 'https://a2agent.me/v1/chat/completions' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer YOUR_A2AGENT_API_KEY' \
  -d '{"model":"YOUR_MODEL_ID","max_tokens":128,"messages":[{"role":"user","content":"Reply with OK."}]}'

Troubleshooting

If authentication works but model selection fails, check the openai/ prefix and model ID. Do not substitute OPENAI_BASE_URL.

401 / 403: authentication or access denied

Use a key issued by A2Agent, without extra spaces, and check that it is active and unexpired. Confirm the group permits the model and protocol. A vendor subscription credential cannot replace an A2Agent key.

404 / model not found: endpoint or model mismatch

Check the root URL, /v1 prefix and full request path against this guide; avoid duplicated paths. Model IDs are case-sensitive and must be accessible to the current key.

429: quota or rate limit

Check your balance, key limits, concurrent usage and service status. Wait before retrying and reduce simultaneous agents; repeated retries do not remove a quota limit.

Chat works, but tools fail or streaming stops

Test a short text request, then a single read-file tool call. Check tool support, output budget, proxy timeouts and client version. Inspect the diff before resuming a long task to avoid repeating actions.

Restore previous settings

Close the terminal, or remove the added model and variables from .aider.conf.yml, .env and your shell profile.

Sources and check date

Status is based on official configuration docs, not end-to-end client testing with A2Agent.

Docs checked 2026-09-18