MCP Server Cal runs on your own machine — the client starts it, so there is no endpoint to ping.
Cal.com scheduling MCP server: manage bookings, event types, and availability.
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Connect this server
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add mcp-server-cal -e 'CAL_API_KEY=<CAL_API_KEY>' -- npx -y @aiwerk/mcp-server-cal{
"mcpServers": {
"mcp-server-cal": {
"command": "npx",
"args": [
"-y",
"@aiwerk/mcp-server-cal"
],
"env": {
"CAL_API_KEY": "<CAL_API_KEY>"
}
}
}
}[mcp_servers.mcp-server-cal]
command = "npx"
args = ["-y", "@aiwerk/mcp-server-cal"]
env = { CAL_API_KEY = "<CAL_API_KEY>" }{
"mcpServers": {
"mcp-server-cal": {
"command": "npx",
"args": [
"-y",
"@aiwerk/mcp-server-cal"
],
"env": {
"CAL_API_KEY": "<CAL_API_KEY>"
}
}
}
}{
"servers": {
"mcp-server-cal": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@aiwerk/mcp-server-cal"
],
"env": {
"CAL_API_KEY": "<CAL_API_KEY>"
}
}
}
}Put your own value in place of
<CAL_API_KEY> (Cal.com API key (prefix cal_ or cal_live_). Create one at Cal.com Settings > Security > API Keys).
The author’s registry entry marks it as required.
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MCP Server Cal — questions
Answers built from our own checks of this server.