Not every agent runs on Gmail and Slack. The connector layer in Scalekit is open by design — so whether you're calling a prebuilt integration, wrapping an internal API, or defining a custom tool contract, the same auth infrastructure handles it.

Four options, all first-class:
- Use what's prebuilt — Pick a connector, start calling tools immediately. Get started here
- Build a custom tool — Define a tool contract against any API. Proxy the call through Scalekit and get token injection and authorization checks. Get started
- Bring your own connector — Wrapping an internal API or niche SaaS? Register it with your own OAuth config. Your agent treats it like any native integration.
- Request a connector — Don't see what you need? We'll build it. Typically live within a week. Request yours here
The auth plumbing is the same regardless of which path you take. Your agent calls execute_tool. Scalekit handles the rest.

