Integrate the Calendly API.Caddi writes and runs the integration for you.
Calendly has a REST API. Self-serve on any Calendly plan including Free, except a few Enterprise-only endpoints, while webhooks need a paid Standard, Teams, or Enterprise plan.
- 99%of agent runs complete successfully
- ~45 minon average to build your first agent
- 1M+back-office tasks completed
The connection is a project before it does anything.
Before the first record moves: an app registration, credentials, token refresh, and somewhere to host and monitor the code. 500 requests per user per minute on paid plans and 50 on Free, with tighter limits on Create Event Invitee (e.g., 10/min, 50/hour, 100/day per user on paid non-Enterprise plans).
Register an app, store Calendly credentials, refresh tokens and code around the rate limits.
Connect your Calendly account once. Caddi holds the connection.
The job doesn't stop at Calendly.
An intake, a filing or a client update also runs through email, documents and the other systems your team works in. The Calendly API only reaches Calendly.
Each extra system is another API, another set of credentials, another integration to own.
One automation runs across every tool the job touches, each through its API.
Someone has to own the code.
API versions change, fields get added and your process moves. No endpoint reschedules an event or invitee, and cancelling works on a whole event but not on one invitee in a Group event.
A developer patches and redeploys the integration each time.
The person who does the work updates it by showing or describing the change. Every automation is reviewed before it runs in production, and every run is logged.
What the Calendly API gives you
- Type
- REST (JSON)
- Authentication
- OAuth 2.0 (public apps) or personal access token (internal use)
- Who can get access
- Self-serve on any Calendly plan including Free, except a few Enterprise-only endpoints, while webhooks need a paid Standard, Teams, or Enterprise plan.
- What it covers
- Users, organizations, event types, availability, scheduled events and invitees (including booking through the Scheduling API), webhooks, contacts, and Notetaker data.
- Limits
- 500 requests per user per minute on paid plans and 50 on Free, with tighter limits on Create Event Invitee (e.g., 10/min, 50/hour, 100/day per user on paid non-Enterprise plans).
- Worth knowing
- No endpoint reschedules an event or invitee, and cancelling works on a whole event but not on one invitee in a Group event.
Official docs: developer.calendly.com. Checked September 2026. Vendors change access terms, so confirm with Calendly before you build.
When to build the Calendly integration in-house
When you have engineers and the integration is your product, or you need one narrow sync between two systems and someone to own it. When the goal is getting Calendly work off someone's desk, the build is the slow part, and Caddi does it for you.
What teams usually want the Calendly API for
Booked-meeting CRM logging
When a Calendly meeting is booked, Caddi creates the right CRM event, links it to the contact, and posts the agenda to the owner.
Meeting prep packet
An hour before each meeting, Caddi assembles the prep packet from the CRM, the planning tool, and recent email, then sends it to the host.
Follow-up flow
After the meeting, Caddi writes a structured note to the CRM, opens any committed follow-up tasks, and confirms next steps with the attendee.
Everything Caddi does with Calendly.
Calendly API questions
Does Calendly have an API?
Yes. Calendly has a REST API, authenticated with OAuth 2.0 (public apps) or personal access token (internal use). The official documentation is at https://developer.calendly.com/.
How do I get access to the Calendly API?
Self-serve on any Calendly plan including Free, except a few Enterprise-only endpoints, while webhooks need a paid Standard, Teams, or Enterprise plan.
Does the Calendly API have rate limits?
500 requests per user per minute on paid plans and 50 on Free, with tighter limits on Create Event Invitee (e.g., 10/min, 50/hour, 100/day per user on paid non-Enterprise plans).
Can I connect Calendly to my other tools without writing code against its API?
Yes. With Caddi you show the Calendly task once, the way you'd train a new hire, and Caddi builds it as verified code that runs across Calendly and the other tools the job touches. Steps that need a person's judgment are handed to Copilot or Claude, and Caddi monitors those too.
Do I need a developer to automate Calendly with Caddi?
No. There is no integration code for you to write or maintain. Every automation Caddi builds for Calendly is reviewed before it runs in production, and every run is logged.