Need help with your APIs? I offer API discovery, governance & evangelism services. Explore services →
API Evangelist API Evangelist
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC
Cal.com website screenshot

Cal.com

Cal.com is open-source scheduling infrastructure (Calendly alternative) available as a managed cloud service or self-hosted deployment. The Cal.com API v2 exposes bookings, event types, schedules, availability, slots, webhooks, OAuth, teams, organizations, OOO, conferencing, destination calendars, and the Cal.com Atoms (Platform) for embedding scheduling primitives into other apps.

agent aware

Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.

Kin Score

API Evangelist profiles Cal.com the way a machine reads it — 32 machine-readable artifacts across 22 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.

Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Cal.com scores 48.5/100 (developing), with a separate agent-readiness read of 44/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 48.5/100 · developing
Contract Quality 13.4 / 25
Developer Ergonomics 2.2 / 20
Commercial Clarity 11.6 / 20
Operational Transparency 4.8 / 13
Governance 7.3 / 12
Discoverability 9.3 / 10
Agent readiness — 44/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 0 / 12
Machine-Readable Auth 0 / 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

How we profile Cal.com

Each block below is one kind of artifact we hold for Cal.com. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 22

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

Individual APIs this provider publishes, each with its own machine-readable definition.

Cal.com Api Keys API

The Api Keys API from Cal.com — 1 operation(s) for api keys.

Cal.com Bookings API

The Bookings API from Cal.com — 16 operation(s) for bookings.

Cal.com Bookings / Attendees API

The Bookings / Attendees API from Cal.com — 2 operation(s) for bookings / attendees.

Cal.com Bookings / Guests API

The Bookings / Guests API from Cal.com — 1 operation(s) for bookings / guests.

Cal.com Cal Unified Calendars API

The Cal Unified Calendars API from Cal.com — 8 operation(s) for cal unified calendars.

Cal.com Calendars API

The Calendars API from Cal.com — 9 operation(s) for calendars.

Cal.com Conferencing API

The Conferencing API from Cal.com — 7 operation(s) for conferencing.

Cal.com Deprecated: Platform / Managed Users API

The Deprecated: Platform / Managed Users API from Cal.com — 4 operation(s) for deprecated: platform / managed users.

Cal.com Deprecated: Platform OAuth Clients API

The Deprecated: Platform OAuth Clients API from Cal.com — 2 operation(s) for deprecated: platform oauth clients.

Cal.com Deprecated: Platform / Webhooks API

The Deprecated: Platform / Webhooks API from Cal.com — 2 operation(s) for deprecated: platform / webhooks.

Cal.com Destination Calendars API

The Destination Calendars API from Cal.com — 1 operation(s) for destination calendars.

Cal.com Event Types API

The Event Types API from Cal.com — 2 operation(s) for event types.

Cal.com Event Types Private Links API

The Event Types Private Links API from Cal.com — 2 operation(s) for event types private links.

Cal.com Event Types / Webhooks API

The Event Types / Webhooks API from Cal.com — 2 operation(s) for event types / webhooks.

Cal.com Me API

The Me API from Cal.com — 1 operation(s) for me.

Cal.com OAuth2 API

The OAuth2 API from Cal.com — 2 operation(s) for oauth2.

Cal.com Schedules API

The Schedules API from Cal.com — 3 operation(s) for schedules.

Cal.com Selected Calendars API

The Selected Calendars API from Cal.com — 1 operation(s) for selected calendars.

Cal.com Slots API

The Slots API from Cal.com — 3 operation(s) for slots.

Cal.com Stripe API

The Stripe API from Cal.com — 3 operation(s) for stripe.

Cal.com Verified Resources API

The Verified Resources API from Cal.com — 8 operation(s) for verified resources.

Cal.com Webhooks API

The Webhooks API from Cal.com — 2 operation(s) for webhooks.

Scroll within the panel for all 22 ·

Open Collections 1

Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.

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

Cal.diy API v2

OPEN COLLECTION

Pricing Plans 1

Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.

Published pricing tiers and plan structures.

Cal Com Plans Pricing

6 plans

PLANS

Rate Limits 1

Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.

Documented rate limits and quota policies.

Cal Com Rate Limits

3 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.

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

Event Specifications 1

Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Cal.com Webhooks

AsyncAPI definition for Cal.com's webhook surface. Cal.com webhooks are HTTP POST deliveries from Cal.com to a developer-defined `subscriberUrl` registered via the Cal.com Webho...

ASYNCAPI

Spectral Rules 1

Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.

Cal.com API Rules

8 rules · 1 errors · 6 warnings

SPECTRAL

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.

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

Cal Com Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Cal Com Vulnerability Disclosure

security.txt · contact published

SECURITY

Cal Com Trust Center

SOC 2, ISO 27001, HIPAA, GDPR

SECURITY

Agentic Access 1

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

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

Cal Com Agentic Access

121 operations · 66 acting · 66 human-in-the-loop

121 operations · 66 acting

AGENTIC

Resources

Every other property we hold for Cal.com — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

Documentation 1

Reference material describing how the API behaves

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Build 1

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 3

Pricing, plans, and the legal terms of use

Company 3

The organization behind the API

← All providers · Data indexed from github.com/api-evangelist/cal-com · machine-readable index on apis.io