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title: "Jentic Arazzo Engine — Overview"
description: >-
  An overview of the Arazzo Engine, the open-source toolkit for the OpenAPI Initiative
  Arazzo standard that chains calls across multiple APIs into workflows.
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# Arazzo Engine – Overview

**Arazzo Engine** is the official open-source toolkit for the
[Arazzo Specification](https://www.openapis.org/arazzo-specification),
an **OpenAPI Initiative** standard for orchestrating complex, multi-API workflows.

While the [OpenAPI Specification (OAS)](https://www.openapis.org/) describes *single* APIs,
**Arazzo** defines a **standard, language-agnostic way to chain calls across multiple APIs** into a workflow.

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## Why Arazzo?

Arazzo makes multi-API automation:

- **Readable** — human- and machine-readable workflow definitions
- **Deterministic** — predictable execution for automation and AI agents
- **Standardized** — backed by the OpenAPI Initiative and the Linux Foundation

**Use cases:**
- Interactive workflow documentation
- Automated testing and QA
- SDK and code generation
- Deterministic API invocation by agents

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## What is Arazzo Engine?

The Arazzo Engine is an **implementation toolkit** for the Arazzo Specification.
It provides libraries and tools to **execute, validate, and work with** Arazzo workflows.

### Today:
- **[Arazzo Runner](../../cli/arazzo-runner.md)** – CLI + Python library for executing workflows

### Planned:
- Workflow validators
- Visual workflow browser
- SDK/code generators

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## Get Started

1. Install and run the [Arazzo Runner](../../cli/arazzo-runner.md)
2. Explore the [architecture](architecture.md) to understand the internals
3. Join the community:
   - 💬 [Discord](https://discord.gg/TdbWXZsUSm)
   - 🐛 [GitHub Issues](https://github.com/jentic/arazzo-engine/issues)

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> **Open Source**  
> Arazzo Engine is maintained in the open under the MIT License.  
> Contributions are welcome — see the [development guide](development.md) for details.