> ## Documentation Index
> Fetch the complete documentation index at: https://docs.veadk.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# Installation

## Prerequisites

* Python 3.10 or later.
* A Volcengine Ark API key for calling models, created in the [Ark console](https://console.volcengine.com/ark).

## Install from PyPI

Install the core package from [PyPI](https://pypi.org/project/veadk-python/):

```bash lines theme={null}
pip install "veadk-python==1.0.4"
```

## Optional dependency groups

VeADK provides optional dependency groups (extras) for on-demand capabilities,
installed individually as needed:

```bash lines theme={null}
pip install "veadk-python[extensions]==1.0.4"
```

| Extra | Purpose |
| - | - |
| `extensions` | Feishu channel, Cozeloop, LlamaIndex, and related integrations |
| `database` | Redis, MySQL, Viking DB, mem0, and other storage backends |
| `eval` | Evaluation via DeepEval and Google ADK |
| `a2ui` | A2UI (agent-driven UI) |
| `pdf` | PDF page rendering |

## Build from source

To develop against the source, build with [uv](https://docs.astral.sh/uv/):

```bash lines theme={null}
git clone --branch 1.0.4 --depth 1 https://github.com/volcengine/veadk-python.git
cd veadk-python

# Create a Python 3.12 virtual environment
uv venv --python 3.12

# Install dependencies (add --extra <name> or --all-extras for extras)
uv sync

# Install VeADK in editable mode
uv pip install -e .
```

Once installed, continue to the [Quickstart](/productions/veadk/archives/1.0.4/en/get-started/quickstart) to
run your first agent.