The API client built for you and your agents.

Connect. Run. Inspect.

One window: your APIs on the left, the script in the middle, and every call it made underneath.

Agents can do the work without becoming a black box.

Let an agent write and run TypeScript against your APIs. Every request it makes appears alongside your own.

1. You ask

   “Check every endpoint in this service and show me anything slower than 500 ms.”

2. The agent writes a typed script

   slow-endpoints.ts

   import { kaja } from "kaja";
   import { Theatre } from "theatre";
   
   const calls = {
     ListMovies: () => Theatre.ListMovies({}),
     ListShows: () => Theatre.ListShows({}),
     ListTheaters: () => Theatre.ListTheaters({}),
   };
   
   const slow: string[][] = [];
   
   for (const [name, send] of Object.entries(calls)) {
     const started = Date.now();
     await send();
     const ms = Date.now() - started;
     if (ms > 500) slow.push([name, `${ms} ms`]);
   }
   
   kaja.table(["method", "duration"], slow);

3. It runs, and every call lands in Kaja

   The run, the calls it made and what came back, in the console your own runs land in.