The inTandem API is your toolkit for building powerful, integrated business management solutions. From client management and scheduling to payments, campaigns, and AI, these APIs give you the flexibility to connect workflows, automate processes, and deliver smarter experiences to your users.

The API is organized into domains, each representing a key business capability. Once you get familiar with one, you’ll find the others follow the same consistent design principles—so you can move fast with confidence.

Here are the top domains you can build with:

AI – Power intelligent assistants, prompt templates, and conversational experiences.
Apps – Extend functionality with applications, widgets, and staff tools.
Clients – Manage contacts, matters, notes, and client relationships.
Communication – Handle calls, messages, sessions, and attachments.
Integration – Import and configure data jobs across systems.
Platform Administration – Manage businesses, profiles, staff, and system settings.
Reviews - Manage reviews about businesses
Sales – Work with coupons and other sales-related entities.
Scheduling – Manage appointments, group events, availability, and waitlists.

👉 Ready to get started? Choose a domain, explore its entities, and fire off your first request.