# Core API Reference

The `openenv.core` package provides the core abstractions for building and running environments. For an end-to-end tutorial on building environments with OpenEnv, see the [building an environment](environment-builder.md) guide.

## Core runtime (`core`)

### Environment server primitives

::: openenv.core.env_server.interfaces

### HTTP server utilities

::: openenv.core.env_server.http_server

### Web interface helpers

::: openenv.core.env_server.web_interface

### Client contracts

::: openenv.core.env_client

### Synchronous client wrapper

::: openenv.core.sync_client

### Shared dataclasses

::: openenv.core.client_types

### Container providers

::: openenv.core.containers.runtime.providers