cal

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Security

Grade A, and why

cal scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

examples/claude_desktop_config.json · 12 lines

What it actually says

{
  "cal": {
    "command": "npx",
    "args": [
      "-y",
      "@askcal/mcp-server"
    ],
    "env": {
      "CAL_API_TOKEN": "cal_live_REPLACE_WITH_YOUR_API_KEY_FROM_AUTH_API_KEYS_ENDPOINT"
    }
  }
}

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

Related

Other mcp servers, from other repositories