Calendly MCP Server: Tools, Setup and Security

Calendly's MCP server lets AI apps list event types, find open times, book and cancel meetings, create one-time scheduling links and manage organization members. Calendly hosts it at https://mcp.calendly.com, and it maps tools to Calendly's public API v2.

Checked against: Calendly MCP server documentation and supported tools list on 28 October 2026. eSEOspace did not install or test this server.

At a glance

What it can do

Calendly's supported tools page lists every tool with its matching REST endpoint. Tool names are prefixed by group.

Scheduling

• Event types: event_types-list_event_types, event_types-get_event_type, event_types-create_event_type, event_types-update_event_type, event_types-list_event_type_available_times, plus availability schedule tools.
• Meetings: meetings-list_events, meetings-get_event, meetings-cancel_event, meetings-create_invitee (books a meeting; needs a paid plan), meetings-list_event_invitees, meetings-get_event_invitee, and no-show tools.
• Links: scheduling_links-create_single_use_scheduling_link and shares-create_share.
• Availability: availability-list_user_availability_schedules, availability-get_user_availability_schedule, availability-list_user_busy_times, and locations-list_user_meeting_locations.
• Routing forms (Teams plan or higher): routing_forms-list_routing_forms, routing_forms-get_routing_form and two submission tools.

User and organization management

• users-get_current_user, users-get_user, organizations-get_organization, membership tools, and organizations-create_organization_invitation and organizations-revoke_organization_invitation.

Skills

• list_calendly_skills and load_calendly_skill.

Calendly says each tool carries annotation metadata: a readable title plus readOnlyHint, destructiveHint and idempotentHint. Clients can use these hints to decide when to ask you before a call. See MCP tool annotations.

How to connect it

Calendly's server docs describe the flow:

1. Set the server URL in your client:

https://mcp.calendly.com

1. The client registers itself through Calendly's DCR endpoint and starts the OAuth flow.
2. A browser window opens. Press Connect to Calendly on the consent screen.
3. Scheduling tools become available.

Calendly's launch announcement from 11 March 2026 says clients need Streamable HTTP and MCP version 2025-03-26 or later. Calendly does not name specific clients. It says the server works with any MCP-compliant client that supports DCR. Clients that only accept a client ID and secret copied from a developer console "will not work with Calendly MCP today."

For developers building their own client, Calendly documents public-client registration (no client secret), mandatory PKCE with S256, and strict HTTPS redirect URI rules.

Security notes

• Same permissions as the API. Calendly says the server has the same scopes and permissions as its public API.
• Two scopes. mcp:scheduling:read and mcp:scheduling:write are attached automatically. The docs do not describe a way to grant read only.
• Customer-facing writes. meetings-cancel_event cancels real meetings, and meetings-create_invitee books them. Both affect people outside your team.
• Admin actions. Invitation tools can add or revoke organization members. Keep approval prompts on.
• No personal access tokens. Calendly says non-OAuth bearer tokens are not supported, which avoids long-lived keys in config files.
• Strict redirects. Wildcards and mixed schemes in redirect URIs are rejected.

A meeting description or form answer can carry instructions to the AI. Read MCP prompt injection and the MCP Security Center.

Alternatives

• HubSpot MCP server: includes CRM appointments and meetings activity.
• Attio MCP server: searches meetings and call recordings linked to CRM records.
• Gong MCP server: read-only insights from recorded calls.

Next step

Calendly MCP is handy for "find a time and send a link" tasks. Test it on your own calendar before giving it to a team. For other sales tools, browse the MCP server directory or read MCP for small business.

Frequently asked questions