The ChronSync API

ChronSync's REST API lets you read availability and manage bookings, event types, plans, and more — authenticated with an API key at https://chronsync.com/api/v1.

ChronSync has a REST API you can use to read availability, create bookings, manage event types, and drive AI scheduling from your own systems. This page covers how to authenticate, where the resources live, and where to find the interactive reference.

Base URL

The API is served at:

https://chronsync.com/api/v1

Authenticate

Every request authenticates with an API key, sent as a Bearer token in the Authorization header:

Authorization: Bearer cs_live_your_api_key_here

If you don't have a key yet, see Create an API key. Each key is limited to the scopes you granted it — a request that needs a scope the key doesn't hold is rejected. See API scopes for the full list.

Requests are rate-limited according to your plan. Build in retry-with-backoff handling so your integration degrades gracefully if it hits the limit.

Resources

Resource	What it covers
`bookings`	Appointments — create, read, and manage them.
`event-types`	The meeting types you offer.
`availability`	Open slots and working hours.
`plans`	AI scheduling plans.
`teams`	Teams and their members.
`allocations`	How bookings are assigned across a team.
`waitlist`	People waiting for a slot to open.
`proposals`	Proposed times awaiting acceptance.
`analytics`	Booking and scheduling metrics.

Interactive reference

The full, interactive reference is generated from the API's OpenAPI specification and lives at:

https://chronsync.com/api/v1/docs

Use it to browse every endpoint, see request and response shapes, and try calls against your account.

MCP server

ChronSync also exposes an MCP server so AI assistants can work with your scheduling directly — reading availability and creating plans and bookings on your behalf, using the same scopes as an API key.