mcpbeat

Callendar MCP Server

co.callendar/mcp
answering

Callendar is answering right now. Last checked 8 min ago. It exposes 4 tools.

WhatsApp® reminders and rescheduling for Calendly. Public read-only MCP endpoint.

Uptime history 43 hours of history
43 hours agonow
100.0%
Uptime 24h
91 of 91 checks
4
Tools
read from the server
122 ms
Response time
average over 24h
open, no key
Access
streamable-http

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.

run in your terminal
claude mcp add mcp --transport http https://app.callendar.de/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "mcp": {
      "url": "https://app.callendar.de/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.mcp]
url = "https://app.callendar.de/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "mcp": {
      "url": "https://app.callendar.de/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "mcp": {
      "url": "https://app.callendar.de/mcp"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

callendar
create_callendar_contact_link
Create a WhatsApp® contact link so a user can talk with a Callendar expert. This does not send any message automatically.
get_callendar_features
Get the public feature list for Callendar.
get_callendar_overview
Get a public overview of Callendar, a SaaS solution for WhatsApp® reminders, cancellations, and rescheduling for Calendly.
get_callendar_pricing
Get public pricing information for Callendar.

Endpoints

URLTransportStateLatencyChecked
https://app.callendar.de/mcp streamable-http answering 115 ms 8 min ago

Callendar — questions

Answers built from our own checks of this server.

What can Callendar do?
It exposes 4 tools, read directly from the server on our last check. Among them: create_callendar_contact_link, get_callendar_features, get_callendar_overview, get_callendar_pricing. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Callendar working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 122 ms. The bar chart above shows every period we have measured.
How do I connect Callendar?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Callendar need an API key?
No. Callendar completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Callendar?
It answers our handshake in 122 ms on average, which is faster than 79% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.