> ## Documentation Index
> Fetch the complete documentation index at: https://docs2.openclaw.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Radius

[Radius](https://radius.earendil.com) is Earendil's model gateway for Pi-compatible
clients. The `radius` plugin connects OpenClaw's agent loop to Radius, including
streamed responses, reasoning, images on supported models, and tool calls.
Radius owns upstream routing, model policies, rewrites, and billing.

## Sign in

Create a Radius account on the [Radius website](https://radius.earendil.com), then
sign in from OpenClaw:

```bash theme={"theme":{"light":"min-light","dark":"min-dark"}}
openclaw models auth login --provider radius --method oauth --set-default
```

OpenClaw displays a pairing code and opens the Radius verification page. Enter
the code, choose your organization, and authorize access. This device flow also
works on a remote Gateway: open the displayed URL in your local browser.
OpenClaw stores the OAuth credentials in its auth profiles and refreshes them
automatically. Signing in to Pi separately does not sign OpenClaw in.

You can also select Radius during onboarding:

```bash theme={"theme":{"light":"min-light","dark":"min-dark"}}
openclaw onboard --auth-choice radius
```

### Organization API key

Create an API key from your organization's **API keys** page in Radius, then use
the interactive prompt:

```bash theme={"theme":{"light":"min-light","dark":"min-dark"}}
openclaw models auth login --provider radius --method api-key --set-default
```

For unattended setup, supply `RADIUS_API_KEY` through your environment or secret
manager and run:

```bash theme={"theme":{"light":"min-light","dark":"min-dark"}}
openclaw onboard --auth-choice radius-api-key
```

Both authentication methods use the selected organization's credits, budgets,
and model access. An expired or revoked API key needs replacement; OAuth refresh
does not extend an API key's lifetime.

## Choose a model

```bash theme={"theme":{"light":"min-light","dark":"min-dark"}}
openclaw models list --provider radius --refresh
openclaw models set radius/balanced
```

OpenClaw discovers the catalog from Radius using your credential. This includes
organization models, reasoning capabilities, context limits, and pricing tiers.
Sign-in recommends `radius/balanced` when available, otherwise the first model
in your organization's catalog. Use a model ID shown by `models list`; available
models and virtual routes can change.

Radius uses its native Pi message protocol at `https://radius.pi.dev/v1`.
The plugin selects that transport automatically. Do not configure Radius as an
OpenAI-compatible `/chat/completions` endpoint.

## Scope and troubleshooting

This plugin provides model access. Radius's optional Pi extension packages,
including their `/radius` commands, web search, artifacts, and Google Workspace
tools, are separate integrations and are not installed by this plugin.
Organization-side routing and rewrite policies still apply to model requests.

If sign-in expires, start it again and enter the new pairing code. If model
discovery rejects authentication, sign in again or replace the organization API
key. If no models are available, check the organization's model access and
budgets in Radius. A broken or truncated response is reported as an error rather
than a successful empty reply.

See [Radius documentation](https://radius.earendil.com/docs),
[Radius models](https://radius.earendil.com/docs/models), and
[model authentication](/concepts/oauth).