> For the complete documentation index, see [llms.txt](https://submodel.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://submodel.gitbook.io/docs/pod/environment-variables.md).

# References

You can store the following environment variables in your Pods.

| Variable                | Description                                                                                 |
| ----------------------- | ------------------------------------------------------------------------------------------- |
| `SUBMODEL_POD_ID`       | The unique identifier for your pod.                                                         |
| `SUBMODEL_API_KEY`      | Used to make SubModel API calls to the specific pod. It's limited in scope to only the pod. |
| `SUBMODEL_POD_HOSTNAME` | Name of the host server the pod is running on.                                              |
| `SUBMODEL_GPU_COUNT`    | Number of GPUs available to the pod.                                                        |
| `SUBMODEL_CPU_COUNT`    | Number of CPUs available to the pod.                                                        |
| `SUBMODEL_PUBLIC_IP`    | If available, the publicly accessible IP for the pod.                                       |
| `SUBMODEL_TCP_PORT_22`  | The public port SSH port 22.                                                                |
| `SUBMODEL_DC_ID`        | The data center where the pod is located.                                                   |
| `SUBMODEL_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.                                             |