mcpbeat

Astrocal MCP Server

dev.astrocal/mcp-server
answering

Astrocal is answering right now. Last checked 15 min ago. 87 installs a week from npm. Last commit 26 Jun 2026.

AI-native scheduling: check availability, book meetings, cancel and reschedule via MCP

Installs per day peak 34 · avg 10 · +38% w/w
a month agotoday
Uptime history 41 hours of history
41 hours agonow
100.0%
Uptime 24h
91 of 91 checks
—
Tools
hidden behind auth
170 ms
Response time
average over 24h
87
Installs / week
npm and PyPI

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 15 min ago.

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

This endpoint answered with an authorization challenge — the server is running, but you need an API key or OAuth to use it.

Endpoints

URLTransportStateLatencyChecked
https://api.astrocal.dev/mcp streamable-http needs key 180 ms 15 min ago

Astrocal — questions

Answers built from our own checks of this server.

Why is there no tool list for Astrocal?
The server answered our handshake with an authorization challenge, so it is running — but it will not describe its tools to an anonymous client. To see them you need to connect with your own credentials. We record it as alive, not as broken: 100.0% of checks in the last 24 hours got a reply.
Is Astrocal 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 170 ms. The bar chart above shows every period we have measured.
How do I connect Astrocal?
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. You will need your own key or an OAuth login: it refuses anonymous clients.
Does Astrocal need an API key?
Yes. Every time we knock, Astrocal answers with an authorization challenge instead of its tool list — that is how we know it is running and gated rather than broken. Bring your own credentials and it will talk.
How fast is Astrocal?
It answers our handshake in 170 ms on average, which is faster than 69% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
How many people use Astrocal?
The npm package @astrocal/mcp-server was installed 87 times in the last week. Week over week that is +38%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Astrocal open source?
Yes — it is published under the MIT licence, written in TypeScript and 1 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.