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NPC Builder brings AI-driven, context-aware NPCs to your games.
Use these guides to set up your account, integrate our SDKs, and call the APIs.
Active plan required: API and SDK access require an NPC Builder subscription.
View plans & pricing.

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Get started

Quickstart

Sign up, generate a token, and receive your first NPC reply in minutes.

Entity Reference

Learn about all the entities existing in NPC Builder and how to use them.

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Game-engine integrations

Unity Plugin

Unity plugin – light backgroundImport the package, add credentials, and chat with NPCs using C# events.

Unreal Engine Plugin

Unity plugin – light backgroundBlueprint nodes for asynchronous conversations in Unreal Engine 5.

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API guides

Interactions API

Authenticate, send messages to NPCs, and handle events in responses.

Context API

Programmatically manage Games, Worlds, Regions, Locations, and Characters.
Need full endpoint details? Explore the OpenAPI reference.