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Mosaic API

Mosaic lets you automate professional-grade video editing with a single REST call. Run pre-built “Agents” – AI workflows that do everything from audio enhancement to automatic cropping and animated captions – then download the finished clip.

5-Minute Quickstart

Get set up, upload a video and run your first agent.

Full API Reference

Endpoints, request / response shapes and webhook events.

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Base URL

https://api.usemosaic.ai/api/

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Core Concepts

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Agent

A saved workflow graph that can be executed via /run-agent. Mosaic ships with a library of ready-made agents and more are added every month.

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Agent Run

An execution instance of an agent. Tracks progress (queued → running → completed|failed) and stores per-node metadata.

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File ID

Every uploaded asset receives a UUID (v4). Use this file_id when kicking off agents, or pass a local file in by using our signed url upload method.

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Credits

Billing is usage-based and function the same as the web UI. Failed runs automatically refund any unspent credits.
Looking for a paste-and-go example? Jump to the Quickstart or dive straight into the API reference.