Copy its agent key

Creating a box generates an agent key. It is how an agent proves which box it is reporting as, and it is the only piece of configuration the agent genuinely needs.

What a key looks like

mlx_4f8a2c91d7e6b3054a1f8c2d9e7b6a30

An mlx_ prefix followed by 32 hexadecimal characters. Keys are shown masked in the interface; reveal or copy the full value when you need it.

One key per box

Do not reuse a key across servers. Two agents reporting under the same key will interleave their readings into a single box, and the numbers you see will be a meaningless mixture of two machines.

Treat it as a secret

Anyone holding the key can submit metrics as that box. Keep it out of version control, shared documents and screenshots. On the server itself it lives in a root-owned config file, which is covered in Paste the key.

Rotating a key

Rotate from the box's detail panel whenever you suspect a key has leaked, or when you rebuild the underlying server.