# Reference

> Look up exact CLI commands, Python signatures, API fields, errors, and prices.

Source: https://www.nodus-compute.ai/docs/reference/
Build revision: 53bfc045e800bf7bb44fa18623013c7aa9c9971e

Use reference pages to check a specific detail. For a walkthrough, [find a guide](https://www.nodus-compute.ai/docs/guides/) first.

|I need…|Reference|
|-|-|
|Command syntax and flags|[CLI](https://www.nodus-compute.ai/docs/reference/cli/)|
|Python classes, methods, and arguments|[Python SDK](https://www.nodus-compute.ai/docs/reference/python/)|
|HTTP endpoints and request fields|[HTTP API](https://www.nodus-compute.ai/docs/reference/api/) · [OpenAPI JSON](https://www.nodus-compute.ai/docs/openapi.json)|
|An error’s meaning and fix|[Error codes](https://www.nodus-compute.ai/docs/reference/errors/)|
|Help diagnosing a failure|[Troubleshooting](https://www.nodus-compute.ai/docs/reference/troubleshooting/)|
|Training runtime options|[Training runtimes (Beta)](https://www.nodus-compute.ai/docs/reference/runtimes/)|
|Training and evaluation environments|[Environments](https://www.nodus-compute.ai/docs/reference/environments/)|
|CLI and SDK environment variables|[Client configuration](https://www.nodus-compute.ai/docs/reference/server-configuration/)|

Command, SDK, API, error, catalog, and price details are generated from their product sources.