> ## Documentation Index
> Fetch the complete documentation index at: https://docs.loongclaw.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Custom

> Configure the Custom provider profile in Loong.

# Custom

Use this when the real endpoint is OpenAI-compatible but does not map cleanly to one of Loong's built-in provider families.

## At A Glance

| Field            | Value                                                  |
| ---------------- | ------------------------------------------------------ |
| Built-in kind    | `custom`                                               |
| Provider group   | Gateway And Compatibility Providers                    |
| Protocol family  | `openai_chat_completions`                              |
| Feature family   | `openai_compatible`                                    |
| Auth scheme      | `bearer`                                               |
| Credential envs  | CUSTOM\_PROVIDER\_API\_KEY                             |
| Aliases          | `openai_custom`, `custom_openai`                       |
| Default base URL | `https://<openai-compatible-host>/v1`                  |
| Request endpoint | `https://<openai-compatible-host>/v1/chat/completions` |
| Models endpoint  | `https://<openai-compatible-host>/v1/models`           |

## Minimal Config

```toml theme={null}
active_provider = "custom"

[providers.custom]
kind = "custom"
base_url = "https://<openai-compatible-host>/v1"
api_key = { env = "CUSTOM_PROVIDER_API_KEY" }
model = "auto"
```

## Verify It

```bash theme={null}
loong doctor
loong runtime models list
loong ask --message "Say hello and name the active provider."
```

If `runtime models list` is unreliable for this account or region, pin an explicit `provider.model` or add `preferred_models` instead of leaving recovery implicit.

## Auth And Routing Contract

| Contract                    | Value                                                  |
| --------------------------- | ------------------------------------------------------ |
| Auth optional               | no                                                     |
| Model probe auth optional   | no                                                     |
| Default API key env         | `CUSTOM_PROVIDER_API_KEY`                              |
| OAuth env                   | none                                                   |
| Primary request route       | `https://<openai-compatible-host>/v1/chat/completions` |
| Primary model-catalog route | `https://<openai-compatible-host>/v1/models`           |

## Operator Notes

* custom requires tenant-scoped base\_url configuration: replace `<openai-compatible-host>` in `provider.base_url` with your real OpenAI-compatible endpoint root such as `https://api.example.com/v1`; current template: `https://<openai-compatible-host>/v1`.
* Alternative auth path: add `Authorization` / `X-API-Key` in `provider.headers`.
* Use `provider.headers` only when the upstream auth contract does not fit the default bearer-token path.

## Related Docs

* Continue to [Providers And Models](/use-loong/providers-and-models) when you still need the broader chooser page.
* Continue to [Provider Guides](/use-loong/provider-guides/index) for the full built-in provider matrix.
* Continue to [Provider Recipes](/use-loong/provider-recipes) for representative rollout recipes.
* Continue to [Configuration Patterns](/use-loong/configuration-patterns) for the shared provider-profile shape.