# Generic (OpenAI-compatible)

Use this backend for any provider exposing an OpenAI-compatible Chat Completions API.

## Requirements

* Provider base URL.
* Model identifier.
* Optional API key/headers depending on provider.

## Setup

1. Get provider URL and model name.
2. Configure fields in **AI Backend** settings tab.
3. Validate with **Test connection**.

## Configuration

| Setting               | Value                         |
| --------------------- | ----------------------------- |
| **Preferred Backend** | `Generic (OpenAI-compatible)` |
| **Base URL**          | provider URL                  |
| **Model**             | provider model id             |
| **API Key (Bearer)**  | optional                      |
| **Extra Headers**     | optional (`Header: value`)    |
| **Timeout (seconds)** | increase for heavy prompts    |

### URL Behavior

Final endpoint resolution:

* Base URL ends with `/vN` -> append `/chat/completions`.
* Base URL already ends with `/chat/completions` -> use as-is.
* Otherwise -> append `/v1/chat/completions`.

Examples:

```
https://api.example.com    -> https://api.example.com/v1/chat/completions
https://api.example.com/v1 -> https://api.example.com/v1/chat/completions
https://api.example.com/v4 -> https://api.example.com/v4/chat/completions
```

Headers example:

```
X-Org: myorg
X-Project: myproj
```

## Output Token Limits

The extension sets `max_tokens` automatically per request type to ensure complete responses:

| Request Type                 | `max_tokens` |
| ---------------------------- | ------------ |
| **Chat**                     | 4096         |
| **Scanner (single request)** | 2048         |
| **Scanner (batch analysis)** | 4096         |
| **Payload generation**       | 1024         |

## Troubleshooting

{% hint style="info" %}

* `401/403`: verify auth credentials and headers.
* `404`: verify provider supports chat completions at resolved path.
* Timeout: increase timeout or choose smaller/faster model.
  {% endhint %}

## Retry Behavior

If a request fails due to a transient network error, the extension retries automatically up to 6 attempts using a bounded stepped backoff (500/1000/1500/2000/3000/4000 ms). A circuit breaker opens after 5 consecutive failures and resets after 30 s. Each retry is logged in the [AI Request Logger](/privacy-and-logging/ai-request-logger.md). See [Backends Overview → Retry Behavior](/backends/overview.md#retry-behavior).

## Related Pages

* [Backends Overview](/backends/overview.md)
* [Troubleshooting](/reference/troubleshooting.md)


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