Yes, Chronogate is free to use.

How do I install Chronogate?

Chronogate is a remote plugin. You do not need to install anything locally. Add the server URL to your AI app's MCP configuration and you are ready to go.

Is Chronogate safe to use?

Yes. Chronogate passed MCP Marketplace's automated security scan with a score of 10/10 (low risk). Every server on MCP Marketplace is security-scanned before it's listed; see the full security report on this page for the findings and permissions.

What AI apps work with Chronogate?

Chronogate uses the Model Context Protocol (MCP) and works with any MCP-compatible AI app, including Claude, ChatGPT / Codex, Gemini, Copilot, Cursor, and more.

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Chronogate MCP Server

by Chronogate

Developer ToolsLow Risk10.0MCP RegistryRemote

Free

Server data from the Official MCP Registry

Timezone and business-day truth for agents: now, DST-safe convert, relative dates, holidays.

About

Timezone and business-day truth for agents: now, DST-safe convert, relative dates, holidays.

Remote endpoints: streamable-http: https://chronogate-self.vercel.app/mcp

Security Report

10.0

Low Risk10.0Low Risk

Valid MCP server (1 strong, 0 medium validity signals). No known CVEs in dependencies. Imported from the Official MCP Registry.

5 tools verified · Open access · No issues found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.

Permissions Found in Source Code

Found by scanning the linked source code. This listing connects to a hosted endpoint, so none of this runs on your machine: it describes what the server software does where it is hosted.

HTTP Network Access

Connects to external APIs or services over the internet.

env_vars

Applies to the server that hosts this plugin, not to your machine.

database

Applies to the server that hosts this plugin, not to your machine.

How to Connect

Remote Plugin

No local installation needed. Your AI client connects to the remote endpoint directly.

Add this to your MCP configuration to connect:

{
  "mcpServers": {
    "io-github-chronogate-chronogate": {
      "url": "https://chronogate-self.vercel.app/mcp"
    }
  }
}

Documentation

View on GitHub

From the project's GitHub README.

ChronoGate

Timezone and business-day truth for scheduling agents. LLMs guess at "now", DST and holidays; ChronoGate answers authoritatively: current time in any IANA zone, DST-safe conversion, relative expressions ("next Tuesday 3pm", "in 3 business days"), and public-holiday-aware business days for 100+ countries (via Nager.Date).

Remote MCP: https://chronogate-self.vercel.app/mcp (Streamable HTTP, JSON-RPC, protocol 2025-06-18, stateless)
Docs for agents: https://chronogate-self.vercel.app/llms.txt
Free tier: 200 calls/day per IP, no API key. Over the limit returns HTTP 402 (with buy link); resets 00:00 UTC. Paid tier coming.

MCP tools

Tool	What it does
`now`	Current instant + wall-clock time, offset and DST flag in an IANA zone
`convert`	Convert an ISO timestamp between zones, DST-safe
`resolve_expression`	Resolve "tomorrow 9am", "next Tuesday 3pm", "in N business days" to an exact instant
`is_business_day`	Weekend + public-holiday check for a date and country
`add_business_days`	Add N business days to a date, skipping weekends and holidays

Client config

{
  "mcpServers": {
    "chronogate": {
      "type": "http",
      "url": "https://chronogate-self.vercel.app/mcp"
    }
  }
}

REST

curl "https://chronogate-self.vercel.app/v1/now?tz=America/Chicago"
curl "https://chronogate-self.vercel.app/v1/convert?iso=2026-03-08T08:00:00Z&to=America/Chicago"
curl "https://chronogate-self.vercel.app/v1/resolve?expr=next%20Tuesday%203pm&tz=America/Chicago"
curl "https://chronogate-self.vercel.app/v1/business-day?date=2026-07-03&country=US"
curl "https://chronogate-self.vercel.app/v1/business-days/add?start=2026-07-02&days=3&country=US"

# MCP over plain HTTP
curl -X POST https://chronogate-self.vercel.app/mcp -H 'content-type: application/json' \
  -H 'accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

Run locally

npm install && npm run dev   # local server
npm test                     # smoke tests

Deploys as Vercel serverless functions (see vercel.json).

Notes

Holidays come from the public Nager.Date API; if it's unavailable, weekend logic still works (holiday_source: "unavailable").
Terms
ChronoGate is not affiliated with chronogate.io.

MIT licensed.

Paid credits

$5 = 20,000 calls (one-time pack, no subscription). Buy: https://buy.stripe.com/3cIeVec3Hagz6ZBc4VgMw00
After paying you land on /success, which shows your cg_ API key once (kept 7 days).
REST: Authorization: Bearer cg_.... MCP: same header on https://chronogate-self.vercel.app/mcp
1 credit per call. Unknown key → 401. Empty key or free tier used up → 402 with a buy link.

Docker (stdio MCP)

docker build -t chronogate .
docker run -i --rm chronogate        # MCP over stdio; wrap with mcp-proxy for HTTP
npm run healthcheck                  # initialize + tools/list handshake (also the Docker HEALTHCHECK)

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