Callendar

co.callendar/mcp · v1.0.0 · communication

Callendar is failing the MCP handshake. It scores 11/100.

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

Endpoint: https://app.callendar.de/mcp (streamable-http)

No repository listed · Website · JSON · Add to my inventory

Score 11/100

health	5 / 25
authEase	0 / 15
toolQuality	0 / 15
maintenance	3 / 15
adoption	0 / 10
usage	0 / 10
security	3 / 10

Scoring v0.3, computed 2026-10-15T02:26:35.745Z.

Endpoint responded but MCP handshake failed
GitHub signals are off for everyone: maintenance uses registry dates (half credit)
No source repository listed

Health history

Checked (UTC)	Status	Latency	Error
2026-10-14T17:30:35.096Z	Failing	2709	initialize HTTP 404

Tools (0)

Tools are listed after a successful handshake.