API documentation

Fusion Online provides a robust API that allows developers and integration tools to interact programmatically with project, task, resource, and user data. The API supports a wide range of use cases—from building custom dashboards and automation scripts to integrating Fusion with other enterprise systems.

Full API details (including SDKs, endpoints, and data models) are available in our dedicated API documentation site:

Fusion Online API documentation

What you can do with the API

• Create and update tasks, projects, and resources

• Retrieve status, buffer, and scheduling data

• Manage custom fields and assignments

• Automate reporting and data synchronization

• Build custom workflows and integration layers

Authentication and API Keys

To make API calls, you'll need an API key. API keys are generated and managed by System Administrators.

For details on how to generate and manage API keys, see the API Keys reference.