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 14 API contracts indexed on the APIs.io network, including Webhook API, Activity Log API, Availability API, and 11 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 18 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

39.2/100 thin ▬ flat Agent 41/100 agent ready Front door AI 5/6 prominent saas Full breakdown ↓
scored 2026-10-17 · rubric v0.24.0

AccessFreemiumSelf serve⚡ Free to try

1 published contract 1 MCP Servers

Appointments Automation Booking Calendar Meetings Scheduling

What this lets a business do 2

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Developer Platform & API Ecosystem Management

BC-4270

Webhook Subscriptions

POST /webhook_subscriptions

Compliance Management

BC-130

Data Compliance

POST /data_compliance/deletion/invitees

Kin Score

Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0

Composite quality — 39.2/100 · thin

Contract Quality 11.7 / 19

Developer Ergonomics 3.6 / 15

Access Clarity 5.3 / 15

Operational Transparency 0.8 / 10

Contract Governance 1.2 / 9

Discoverability 5.6 / 8

Regulatory Posture 4.6 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 41/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/calendly: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

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	13.8	-	-

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.

APIs 14

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 Activity Log API

Endpoints for retrieving activity log entries for an organization.

Calendly Availability API

Endpoints for viewing available times for event types and managing user availability schedules.

Calendly Data Compliance API

Endpoints for handling data compliance requests such as deletion and retrieval of invitee data.

Calendly Event Types API

Endpoints for listing, retrieving, and managing event types that define the kinds of meetings users can schedule.

Calendly Groups API

Endpoints for listing and retrieving organization groups.

Calendly Invitees API

Endpoints for listing, retrieving, and creating invitees on scheduled events.

Calendly Organizations API

Endpoints for managing organization memberships, invitations, and organization-level settings.

Calendly Routing Forms API

Endpoints for listing and retrieving routing forms and their submissions.

Calendly Scheduled Events API

Endpoints for listing, retrieving, and canceling scheduled events (booked meetings).

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 Webhook Subscriptions API

Endpoints for creating, listing, retrieving, and deleting webhook subscriptions that receive real-time event notifications.

Scroll for all 14

Open Collections 14

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Calendly Scheduling Activity Log API

OPEN COLLECTION

Calendly Scheduling Activity Log Availability API

OPEN COLLECTION

Calendly Scheduling Activity Log Data Compliance API

OPEN COLLECTION

Calendly Scheduling Activity Log Event Types API

OPEN COLLECTION

Calendly Scheduling Activity Log Groups API

OPEN COLLECTION

Calendly Scheduling Activity Log Invitees API

OPEN COLLECTION

Calendly Scheduling Activity Log Organizations API

OPEN COLLECTION

Calendly Scheduling Activity Log Routing Forms API

OPEN COLLECTION

Calendly Scheduling Activity Log Scheduled Events API

OPEN COLLECTION

Calendly Scheduling API

OPEN COLLECTION

Calendly Scheduling Activity Log Shares API

OPEN COLLECTION

Calendly Scheduling Activity Log Users API

OPEN COLLECTION

Calendly Scheduling Activity Log Webhook Subscriptions API

OPEN COLLECTION

Scroll for all 14

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Calendly MCP Server

Remote MCP server at mcp.calendly.com over HTTP.

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Calendly Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Calendly Rate Limits

2 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Calendly Finops

FINOPS

Event 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...

ASYNCAPI

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Calendly Context

0 classes · 9 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Calendly — asyncapi rules

9 rules · 1 errors 8 warnings

SPECTRAL

Calendly — jsonschema rules

6 rules · 5 warnings 1 info

SPECTRAL

JSON Schema 3

Standalone JSON Schema definitions for this provider's data models.

Calendly Event Type

20 properties

JSON SCHEMA

Calendly Invitee

21 properties

JSON SCHEMA

Calendly Scheduled Event

13 properties

JSON SCHEMA

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Calendly Authentication

http · 1 scheme

SECURITY

Calendly Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Calendly Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Calendly Agentic Access

35 operations · 10 acting · 1 human-in-the-loop

35 operations · 10 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Portal

Portal

Login

Documentation 4

Reference material describing how the API behaves

Documentation

JSONSchema

JSONSchema

JSONSchema

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

JSONLD

JSONLD

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Plans

FinOps

PrivacyPolicy

TermsOfService

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: calendly
name: Calendly
url: https://raw.githubusercontent.com/api-evangelist/calendly/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/calendly.png
type: Index
x-docs-platform: fern
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-09-21
tags:
- Appointments
- Automation
- Booking
- Calendar
- Meetings
- Scheduling
tags_raw:
- Appointments
- Automation
- Booking
- Calendars
- Meetings
- Scheduling
created: '2026-03-20'
modified: '2026-05-19'
specificationVersion: '0.23'
description: 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.
apis:
- aid: calendly:webhook-api
  name: Calendly Webhook API
  tags:
  - Event
  - Notification
  - Scheduling
  - Webhook
  tags_raw:
  - Events
  - Notifications
  - Scheduling
  - Webhooks
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  baseURL: https://api.calendly.com
  humanURL: https://developer.calendly.com/api-docs
  properties:
  - url: https://developer.calendly.com/api-docs
    type: Documentation
  - url: asyncapi/calendly-webhook-api-asyncapi.yml
    type: AsyncAPI
  description: The Calendly Webhook API enables developers to receive real-time notifications when scheduling events occur
    in Calendly. By creating webhook subscriptions, applications can automatically receive data whenever invitees schedule,
    cancel, or reschedule meetings. This eliminates the need for polling the API and allows for event-driven integrations
    that respond immediately to changes in scheduling activity.
- aid: calendly:embed-api
  name: Calendly Embed API
  tags:
  - Embeddings
  - Scheduling
  - Web Components
  - Widgets
  tags_raw:
  - Embedding
  - Scheduling
  - Web Components
  - Widgets
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  baseURL: https://api.example.com
  humanURL: https://developer.calendly.com/
  properties:
  - url: https://developer.calendly.com/
    type: Documentation
  description: The Calendly Embed API allows developers to integrate Calendly scheduling pages directly into their websites
    and applications. It supports inline embeds, popup widgets, and popup text options, giving developers flexibility in how
    they present scheduling interfaces to users. The Embed API enables customization of the embedded experience and provides
    JavaScript callbacks for tracking when events are scheduled, allowing seamless integration of Calendly booking flows within
    third-party applications.
- aid: calendly:calendly-activity-log-api
  name: Calendly Activity Log API
  description: Endpoints for retrieving activity log entries for an organization.
  humanURL: https://developer.calendly.com/api-docs
  baseURL: https://api.calendly.com
  tags:
  - Activity Log
  properties:
  - type: OpenAPI
    url: openapi/calendly-activity-log-api-openapi.yml
  - type: Documentation
    url: https://developer.calendly.com/api-docs
- aid: calendly:calendly-availability-api
  name: Calendly Availability API
  description: Endpoints for viewing available times for event types and managing user availability schedules.
  humanURL: https://developer.calendly.com/api-docs
  baseURL: https://api.calendly.com
  tags:
  - Availability
  properties:
  - type: OpenAPI
    url: openapi/calendly-availability-api-openapi.yml
  - type: Documentation
    url: https://developer.calendly.com/api-docs
- aid: calendly:calendly-data-compliance-api
  name: Calendly Data Compliance API
  description: Endpoints for handling data compliance requests such as deletion and retrieval of invitee data.
  humanURL: https://developer.calendly.com/api-docs
  baseURL: https://api.calendly.com
  tags:
  - Data Compliance
  properties:
  - type: OpenAPI
    url: openapi/calendly-data-compliance-api-openapi.yml
  - type: Documentation
    url: https://developer.calendly.com/api-docs
- aid: calendly:calendly-event-types-api
  name: Calendly Event Types API
  description: Endpoints for listing, retrieving, and managing event types that define the kinds of meetings users can schedule.
  humanURL: https://developer.calendly.com/api-docs
  baseURL: https://api.calendly.com
  tags:
  - Event Types
  properties:
  - type: OpenAPI
    url: openapi/calendly-event-types-api-openapi.yml
  - type: Documentation
    url: https://developer.calendly.com/api-docs
- aid: calendly:calendly-groups-api
  name: Calendly Groups API
  description: Endpoints for listing and retrieving organization groups.
  humanURL: https://developer.calendly.com/api-docs
  baseURL: https://api.calendly.com
  tags:
  - Group
  tags_raw:
  - Groups
  properties:
  - type: OpenAPI
    url: openapi/calendly-groups-api-openapi.yml
  - type: Documentation
    url: https://developer.calendly.com/api-docs
- aid: calendly:calendly-invitees-api
  name: Calendly Invitees API
  description: Endpoints for listing, retrieving, and creating invitees on scheduled events.
  humanURL: https://developer.calendly.com/api-docs
  baseURL: https://api.calendly.com
  tags:
  - Invitees
  properties:
  - type: OpenAPI
    url: openapi/calendly-invitees-api-openapi.yml
  - type: Documentation
    url: https://developer.calendly.com/api-docs
- aid: calendly:calendly-organizations-api
  name: Calendly Organizations API
  description: Endpoints for managing organization memberships, invitations, and organization-level settings.
  humanURL: https://developer.calendly.com/api-docs
  baseURL: https://api.calendly.com
  tags:
  - Organization
  tags_raw:
  - Organizations
  properties:
  - type: OpenAPI
    url: openapi/calendly-organizations-api-openapi.yml
  - type: Documentation
    url: https://developer.calendly.com/api-docs
- aid: calendly:calendly-routing-forms-api
  name: Calendly Routing Forms API
  description: Endpoints for listing and retrieving routing forms and their submissions.
  humanURL: https://developer.calendly.com/api-docs
  baseURL: https://api.calendly.com
  tags:
  - Routing Forms
  properties:
  - type: OpenAPI
    url: openapi/calendly-routing-forms-api-openapi.yml
  - type: Documentation
    url: https://developer.calendly.com/api-docs
- aid: calendly:calendly-scheduled-events-api
  name: Calendly Scheduled Events API
  description: Endpoints for listing, retrieving, and canceling scheduled events (booked meetings).
  humanURL: https://developer.calendly.com/api-docs
  baseURL: https://api.calendly.com
  tags:
  - Scheduled Events
  properties:
  - type: OpenAPI
    url: openapi/calendly-scheduled-events-api-openapi.yml
  - type: Documentation
    url: https://developer.calendly.com/api-docs
- aid: calendly:calendly-shares-api
  name: Calendly Shares API
  description: Endpoints for creating and managing shareable scheduling links.
  humanURL: https://developer.calendly.com/api-docs
  baseURL: https://api.calendly.com
  tags:
  - Share
  tags_raw:
  - Shares
  properties:
  - type: OpenAPI
    url: openapi/calendly-shares-api-openapi.yml
  - type: Documentation
    url: https://developer.calendly.com/api-docs
- aid: calendly:calendly-users-api
  name: Calendly Users API
  description: Endpoints for retrieving user information and managing user accounts within Calendly.
  humanURL: https://developer.calendly.com/api-docs
  baseURL: https://api.calendly.com
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/calendly-users-api-openapi.yml
  - type: Documentation
    url: https://developer.calendly.com/api-docs
- aid: calendly:calendly-webhook-subscriptions-api
  name: Calendly Webhook Subscriptions API
  description: Endpoints for creating, listing, retrieving, and deleting webhook subscriptions that receive real-time event
    notifications.
  humanURL: https://developer.calendly.com/api-docs
  baseURL: https://api.calendly.com
  tags:
  - Webhook Subscriptions
  properties:
  - type: OpenAPI
    url: openapi/calendly-webhook-subscriptions-api-openapi.yml
  - type: Documentation
    url: https://developer.calendly.com/api-docs
common:
- type: Plans
  url: plans/calendly-plans-pricing.yml
- type: RateLimits
  url: rate-limits/calendly-rate-limits.yml
- type: FinOps
  url: finops/calendly-finops.yml
- type: CapabilityMap
  url: capabilities/calendly-capability-edges.yml
  name: Calendly Business Capability Map
- type: AgenticAccess
  url: agentic-access/calendly-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/calendly-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/calendly-domain-security.yml
- type: Authentication
  url: authentication/calendly-authentication.yml
- type: GitHubOrganization
  url: https://github.com/calendly
- type: LinkedIn
  url: https://www.linkedin.com/company/calendly
- type: Portal
  url: https://developer.calendly.com/
- type: Documentation
  url: https://developer.calendly.com/api-docs
- type: Website
  url: https://calendly.com/
- type: PrivacyPolicy
  url: https://calendly.com/privacy
- type: TermsOfService
  url: https://calendly.com/terms
- type: Blog
  url: https://calendly.com/blog
- type: Login
  url: https://calendly.com/login
- type: JSONLD
  url: json-ld/calendly-context.jsonld
- type: JSONSchema
  url: json-schema/calendly-event-type-schema.json
- type: JSONSchema
  url: json-schema/calendly-scheduled-event-schema.json
- type: JSONSchema
  url: json-schema/calendly-invitee-schema.json
- type: LlmsText
  url: https://developer.calendly.com/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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