scalix-functions

Scalix Functions

Serverless functions that scale to zero when idle. A cold start provisions an isolated environment, so the first invocation after idle is meaningfully slower than a warm one — for latency-sensitive endpoints, keep the function warm with regular traffic.

Runtimes — the rule that prevents wasted work

Supported runtimes are node and python only. Do not attempt to deploy Go, Rust, Ruby, or anything else as a function runtime — for other languages, package a container image instead (--image).

Write a handler

// handler.ts
export default async function handler(req: Request) {
  const body = await req.json();
  return new Response(JSON.stringify({ result: body.x + body.y }), {
    headers: { "Content-Type": "application/json" },
  });
}

Deploy

fn deploy requires either --source <path> or --image <image>:

scalix-cloud fn deploy api --source ./api --runtime node    # from source
scalix-cloud fn deploy api --image registry/img:v1          # from a container image

Invoke and manage

scalix-cloud fn list
scalix-cloud fn invoke api --data '{"x": 1, "y": 2}'
scalix-cloud fn delete <function-id>

The same operations exist over REST (POST https://api.scalix.world/v1/functions) and as MCP tools — prefer MCP tools when this plugin's server is connected.

Full reference: https://docs.scalix.world/functions