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HomeProductDevelopersSelf-HostingChangelog
  • Getting Started
    • Overview
  • Workflows SDK
    • Introduction
    • Installation
      • Overview
      • Start in Code
      • Start in UI
    • Core Concepts
    • Defining Control Flow
    • Configuration
    • Custom Docker Images
  • Client SDK
    • Introduction
    • Authentication
    • API Versioning
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  • Prerequisites
  • Next Steps
  • Learn More
Workflows SDKQuickstart

Quickstart Overview

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Code-first Approach

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Prerequisites

Before getting started, make sure you have:

  • Python 3.9+ installed (download here)
  • A Vellum account (sign up for free)
  • Your VELLUM_API_KEY environment variable set

For detailed installation instructions including Python and uv setup, see our Installation Guide.

Next Steps

Code-first

Build Workflows in code, push to UI

UI-first

Pull Workflows from UI, run locally

With Vellum, you can go back and forth between code and UI at any point!

Learn More

  • Core Concepts - Learn about core concepts like Nodes, Ports, Expressions, State, & more
  • Defining Control Flow - Master Workflow graph patterns
  • Configuration - Polish your development environment
  • Examples - Explore real-world Workflow examples
  • Evaluations - Test your Workflows rigorously