Radius documentation

Getting started

Create your account and connect Pi, in one of two ways:
1. From Pi: run /login radius. The Radius website opens, where you create an account, choose or create an organization and authorize Pi.
2. From the website: create your account with Enter Radius, then run /login radius in Pi to connect it.
When Pi asks to configure the Radius MCP server, choose Yes. This lets Pi set up and manage Radius for you. If you skip it, see Radius MCP and web search to set it up later.
If your organization has no credit yet, add it on the organization's Billing page.
Run /model and select a Radius model.

Building an agent on Pi, or running Pi in CI? Create an API key on your organization's API keys page and set RADIUS_API_KEY.

What you can do with Radius

Model gateway: access several leading agentic models from one account. Buy credits once and use them with any model.
- Models: customize routing and thinking levels across your whole organization.
- Rewrite rules: optimize your context by trimming noisy tool output or adding your own instructions. Use the built-in rules for git and grep, or write your own.
Organization controls: control teams and spending with roles, groups, budgets, model availability and automatic top-ups.
API keys: power your own agents with Radius.
Analytics: analyze your usage and spend by member and model.
Radius MCP: let Pi set up and manage Radius for you.
Web search: search the web from Pi with Parallel search, billed to your Radius account. Choose free search or paid search with zero data retention. It's off until you turn it on.
Artifacts: publish reports, dashboards and small sites and share them with your team.

Ask Pi to manage Radius

With the Radius MCP server set up, you can ask Pi what Radius can do, and have it make changes you would otherwise make on the Radius website. For example:

"What can I set up for my organization in Radius?"
"Turn on the compact git diff rule for the balanced model."
"Set a $200 monthly budget for the design group."
"What did we spend last week, by member and model?"
"Turn on web search for my organization."
"Publish this report as an artifact and share it with my organization."

Pi can only do what your role in the organization allows.

Billing

Radius charges for what you use. Models and tools draw from one credit balance, billed to your organization. Add credit or set up automatic top-ups on the organization's Billing page. See Pricing for current prices.

Feedback

Send feedback and questions to feedback@earendil.com.