Calendly
Calendly is a scheduling automation platform that helps individuals, teams, and organizations automate the meeting lifecycle by removing the back-and-forth of scheduling. Their developer platform provides APIs for programmatically managing scheduling workflows, receiving real-time event notifications via webhooks, and embedding scheduling interfaces directly into third-party applications.
Calendly publishes 18 API contracts indexed on the APIs.io network, including Webhook API, Availability API, Groups API, and 15 more. Tagged areas include Appointments, Automation, Booking, Calendar, and Meetings.
The Calendly catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 2 Spectral governance rulesets.
Calendly’s developer surface includes authentication, developer portal, documentation, engineering blog, and 19 more developer resources.
What this lets a business do 2
Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →
Kin Score
Markets this provider is in provisional
The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.
| Market | Position | Depth | Registered MCP server | Declares compatibility |
|---|---|---|---|---|
| Workplace Collaboration App Marketplaces | builds-on | 31.8 | - | - |
| Zoom App Marketplace and Partner Ecosystem (builders and partners on Zoom) | builds-on | 31.8 | - | - |
| Browser Extension Stores (company-published Firefox add-ons; Chrome Web Store unreadable) | builds-on | 31.8 | - | - |
| Raycast Store Extensions (first-party publishers + community-wrapped products) | builds-on | 31.8 | - | - |
| IFTTT Services (service publishers) | builds-on | 31.8 | - | - |
Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.
Standards implemented 5
Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.
APIs 18
Individual APIs this provider publishes, each with its own machine-readable definition.
Calendly Webhook API
The Calendly Webhook API enables developers to receive real-time notifications when scheduling events occur in Calendly. By creating webhook subscriptions, applications can auto...
Calendly Embed API
The Calendly Embed API allows developers to integrate Calendly scheduling pages directly into their websites and applications. It supports inline embeds, popup widgets, and popu...
Calendly Availability API
Endpoints for viewing available times for event types and managing user availability schedules.
Calendly Groups API
Endpoints for listing and retrieving organization groups.
Calendly Organizations API
Endpoints for managing organization memberships, invitations, and organization-level settings.
Calendly Shares API
Endpoints for creating and managing shareable scheduling links.
Calendly Users API
Endpoints for retrieving user information and managing user accounts within Calendly.
Calendly Activity Log API
The activityLog API from Calendly — 1 operation(s) for activitylog.
Calendly Contacts API
The contacts API from Calendly — 4 operation(s) for contacts.
Calendly Data Compliance API
The dataCompliance API from Calendly — 2 operation(s) for datacompliance.
Calendly Event Types API
The eventTypes API from Calendly — 5 operation(s) for eventtypes.
Calendly Locations API
The Locations API from Calendly — 1 operation(s) for locations.
Calendly Notetaker API
The notetaker API from Calendly — 3 operation(s) for notetaker.
Calendly Outgoing Communications API
The outgoingCommunications API from Calendly — 1 operation(s) for outgoingcommunications.
Calendly Routing Forms API
The routingForms API from Calendly — 4 operation(s) for routingforms.
Calendly Scheduled Events API
The scheduledEvents API from Calendly — 8 operation(s) for scheduledevents.
Calendly Webhooks API
The Webhooks API from Calendly — 3 operation(s) for webhooks.
Calendly Scheduling Links API
The Scheduling Links API from Calendly — 1 operation(s) for scheduling links.
Scroll for all 18
Open Collections 13
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Calendly Scheduling Activity Log API
OPEN COLLECTIONCalendly Scheduling Activity Log Availability API
OPEN COLLECTIONCalendly Scheduling Activity Log Data Compliance API
OPEN COLLECTIONCalendly Scheduling Activity Log Event Types API
OPEN COLLECTIONCalendly Scheduling Activity Log Groups API
OPEN COLLECTIONCalendly Scheduling Activity Log Invitees API
OPEN COLLECTIONCalendly Scheduling Activity Log Organizations API
OPEN COLLECTIONCalendly Scheduling Activity Log Routing Forms API
OPEN COLLECTIONCalendly Scheduling Activity Log Scheduled Events API
OPEN COLLECTIONCalendly Scheduling API
OPEN COLLECTIONCalendly Scheduling Activity Log Shares API
OPEN COLLECTIONCalendly Scheduling Activity Log Users API
OPEN COLLECTIONCalendly Scheduling Activity Log Webhook Subscriptions API
OPEN COLLECTIONScroll for all 13
MCP Servers 1
Model Context Protocol servers that expose these APIs to AI agents.
Calendly API pricing
Not yet checked against Calendly's own pricing page. Compiled by API Evangelist on 2026-05-05 from calendly.com/pricing; confirm before you rely on a figure. A free plan or tier is listed.
| Plan | Price |
|---|---|
| Free freemium | Free |
| Standard subscription | — |
| Teams subscription | — |
| Enterprise enterprise | — |
Plan details, limits and sources →
Rate limits
- Scheduling API requests: see developer.calendly.com Stoplight docs requests per minute
- Webhook delivery retries: see developer.calendly.com webhook docs retries per failed event
Compiled by API Evangelist, not yet checked against Calendly's documentation. Rate-limit details →
Billed by: seat · FinOps profile →
Pricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Calendly Rate Limits
RATE LIMITSService Levels 1
Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.
Calendly
SLAFinOps 1
Cost, billing, and metering signals for API financial operations.
Calendly Finops
FINOPSEvent Specifications 1
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Calendly Webhook Events
The Calendly Webhook API enables developers to receive real-time notifications when scheduling events occur in Calendly. By creating webhook subscriptions, applications can auto...
ASYNCAPISemantic Vocabularies 1
JSON-LD contexts and semantic vocabularies used across these APIs.
Calendly Context
JSON-LDSpectral Rules 2
Spectral governance rulesets for linting and validating these APIs.
Calendly — asyncapi rules
SPECTRALCalendly — jsonschema rules
SPECTRALJSON Schema 3
Standalone JSON Schema definitions for this provider's data models.
Security Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 2
Portal, sign-up, and the first successful call
Documentation 4
Reference material describing how the API behaves
Agent Surfaces 2
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 1
Pagination, idempotency, versioning, errors, and events
Build 2
SDKs, sample code, and the tooling you integrate with
Access & Security 3
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 4
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Other 1
Properties that don't map to a standard resource type
Source (apis.yml)
Calendly API — frequently asked questions
Does Calendly have an API?
Yes. APIs.io lists 18 APIs from Calendly, including Calendly Webhook API, Calendly Embed API and Calendly Availability API, and 15 more.
Is there an OpenAPI specification for the Calendly API?
Yes. APIs.io indexes 16 OpenAPI specifications for Calendly, each linked for download from this page.
How do I authenticate with the Calendly API?
Calendly documents its authentication (http · 1 scheme). The details are profiled on APIs.io as Calendly Authentication.
How much does the Calendly API cost?
APIs.io lists 4 pricing plans for Calendly, with each plan's price, limits and inclusions under Pricing on this page.
Does Calendly have an MCP server?
Yes. APIs.io lists 1 MCP server for Calendly: Remote MCP server at mcp.calendly.com over HTTP.
Is the Calendly API ready for AI agents?
Calendly has a Kin Score of 45.0 out of 100 (developing) and an Agent Readiness score of 48.1 (agent-ready), scored by API Evangelist on 2026-11-06.
Work with this as data
Every provider here is available over the APIs.io API and to AI agents over MCP.