Cal.com

./Book

Open-source scheduling with a documented API for availability lookups and booking meetings

llms.txt

[✗]MCP Server

[✗]OpenAPI Spec

[✗]Skill File

[✓]llms.txt↗

[✗]Structured Feed

none documented — this service is not reachable over an agent payment protocol

authAPI Key

onboardingFull — agent can self-onboard

tosExplicitly welcomes bots

webhooksYes

free tierYes

billingsubscription

#scheduling#calendar#meetings#open-source

https://cal.com

// last verified 8/26/2026