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updatedAt: 2026-09-14T21:59:30.000Z
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Fetch the complete documentation index at: https://docs.synthesia.io/llms.txt. Use this file to discover all available pages before exploring further. Append .md to any documentation page URL to get its markdown version.

# Introduction

Reference documentation about Synthesia's APIs.

# Introduction

Reference documentation for Synthesia's APIs.

Synthesia has four APIs, built for different jobs:

* **Interactive Avatars API** — render a live, lip-synced avatar into a real-time conversation you control. Synchronous and streaming, not a video file.
* **Video API** — generate finished video files: scripted avatar videos, dubbing, translation, and templates at scale. Asynchronous — you submit a job and poll or get a webhook when it's ready.
* **Upload API (V2)** — upload your own image/video assets or custom script audio (e.g. your own text-to-speech) for use when creating Video API videos.
* **Billing API** — retrieve your workspace's current billing period and credit balance programmatically.

Plan availability differs by API — see each API's page for details.

## Choose your API

<Cards>
  <a href="https://docs.synthesia.io/reference/interactive-avatars" style="text-decoration:none;"><Card title="Interactive Avatars API" icon="fa-comments">Real-time, conversational avatars rendered live into a session you control.</Card></a>
  <a href="https://docs.synthesia.io/reference/video-api-introduction" style="text-decoration:none;"><Card title="Video API" icon="fa-film">Generate scripted avatar videos, dubbing, translations, and templates at scale.</Card></a>
</Cards>

<Cards>
  <a href="https://docs.synthesia.io/reference/create-an-asset" style="text-decoration:none;"><Card title="Upload API (V2)" icon="fa-upload">Upload your own image, video, or script-audio assets for use in Video API requests.</Card></a>
  <a href="https://docs.synthesia.io/reference/billing" style="text-decoration:none;"><Card title="Billing API" icon="fa-credit-card">Retrieve your workspace's current billing period and credit balance.</Card></a>
</Cards>

<Callout icon="🔎" theme="default">
  Looking for Video API rate limits, testing steps, or read/write operations? They've moved to the [Video API](https://docs.synthesia.io/reference/video-api-introduction) page.
</Callout>

# What’s Next

Get started with Synthesia APIs with the following guides

* [API Quickstart](https://docs.synthesia.io/reference/synthesia-api-quickstart.md)
* [Guide: Create a video from template](https://docs.synthesia.io/reference/guide-create-a-video-from-template.md)
* [Guide: Synthesia <> Zapier integration](https://docs.synthesia.io/reference/guide-synthesia-zapier.md)