> ## Documentation Index
> Fetch the complete documentation index at: https://runpod-b18f5ded-public-endpoints.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Pod environment variables

You can store the following environment variables in your Pods.

| Variable              | Description                                                                               |
| --------------------- | ----------------------------------------------------------------------------------------- |
| `RUNPOD_POD_ID`       | The unique identifier for your pod.                                                       |
| `RUNPOD_API_KEY`      | Used to make Runpod API calls to the specific pod. It's limited in scope to only the pod. |
| `RUNPOD_POD_HOSTNAME` | Name of the host server the pod is running on.                                            |
| `RUNPOD_GPU_COUNT`    | Number of GPUs available to the pod.                                                      |
| `RUNPOD_CPU_COUNT`    | Number of CPUs available to the pod.                                                      |
| `RUNPOD_PUBLIC_IP`    | If available, the publicly accessible IP for the pod.                                     |
| `RUNPOD_TCP_PORT_22`  | The public port SSH port 22.                                                              |
| `RUNPOD_ALLOW_IP`     | You can whitelist specific IPs to access your pod, like 192.168.0.12/32, 172.16.0.16/32.  |
| `RUNPOD_DC_ID`        | The data center where the pod is located.                                                 |
| `RUNPOD_VOLUME_ID`    | The ID of the volume connected to the pod.                                                |
| `CUDA_VERSION`        | The installed CUDA version.                                                               |
| `PWD`                 | Current working directory.                                                                |
| `PYTORCH_VERSION`     | Installed PyTorch Version.                                                                |
| `PUBLIC_KEY`          | The SSH public keys to access the pod over SSH.                                           |