# ESMValCore API Reference ESMValCore is mostly used as a commandline tool. However, it is also possibly to use (parts of) ESMValTool as a library. This section documents the public API of ESMValCore. * [CMOR functions](esmvalcore.cmor.html.md) * [Configuration](esmvalcore.config.html.md) * [Dataset](esmvalcore.dataset.html.md) * [Exceptions](esmvalcore.exceptions.html.md) * [Access data from any source](esmvalcore.io.html.md) * [Iris helper functions](esmvalcore.iris_helpers.html.md) * [Preprocessor functions](esmvalcore.preprocessor.html.md) * [Regridding schemes](esmvalcore.regridding_schemes.html.md) * [Type hints](esmvalcore.typing.html.md) * [Experimental API](esmvalcore.experimental.html.md)