| tcp | Tests TCP connectivity and measures dial latency. |
| mem | System memory and swap usage. |
| temp | CPU and system temperatures from hardware sensors. |
| uptime | System uptime. |
| dns | Resolves a hostname and reports status and latency. |
| disk | Filesystem usage per mountpoint. |
| systemd | Tracks systemd unit ActiveState and SubState via the system DBus. |
| cert | Reads the TLS leaf certificate from a host and reports expiry signals. |
| http | Performs an HTTP request and reports status, response code, and latency. |
| cpu | Per-core and total CPU usage percentage. |
| net | Network interface counters per interface. |
| exec | Runs a shell command and captures its first line of output as a metric. |
| load | System load averages. |
| process | Status, CPU, and memory usage for a specific process. |