# Process Intelligence APIs

This is a family of APIs that are geared towards consuming from and interacting with Celonis process intelligence.

## [Knowledge Model API](/process-intelligence-apis/knowledge-model-api/overview)

API to discover and consume Celonis process knowledge in the context of a specific application (packaged in a Knowledge Model). Learn how to start consuming Celonis Knowledge [here](/process-intelligence-apis/knowledge-model-api/get-started/getting-started).

## [Event Subscription API](/process-intelligence-apis/subscription-api/overview)

API to discover business triggers, manage trigger subscriptions and receive spontaneous Celonis business events. Learn how to subscribe to Celonis triggers and receiving spontaneous events [here](/process-intelligence-apis/subscription-api/get-started/getting-started).

## [AI API](/process-intelligence-apis/agents-api/overview)

API used to interact with Process Copilots outside of the Celonis Platform ([Chat API](/process-intelligence-apis/agents-api/overview#chat-api)). Learn how to start interacting with Celonis AI API [here](/process-intelligence-apis/agents-api/overview).