Koskamo

ChronoGate MCP

ChronoGate provides authoritative timezone and business-day data for AI agents. It offers tools to get current time in any IANA zone, perform DST-safe time conversions, resolve relative date expressions, and check or add business days while accounting for public holidays across 100+ countries.

Endpoint and access

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ChronoGate MCP logo, by ChronoGateCommunity listingStreamable HTTPNo sign-inEndpoint checked 2026-11-01Published by ChronoGate
You need:Free: 200 calls/day per IP, no key needed.
MCP endpoint (Streamable HTTP)
https://chronogate-self.vercel.app/mcp
Vendor documentation

What you can do with it

  • Get current time and DST status in a specific IANA timezone
  • Convert ISO timestamps between different time zones safely
  • Resolve natural language date expressions like 'next Tuesday 3pm'
  • Check if a date is a business day or add business days skipping holidays

Source and maintenance

Community listingRegistry 0.1.0
mcp-registry: io.github.chronogate/chronogate@0.1.0Source repositoryProject website
Maintenance checked

Protocol and capabilities

Server
chronogate 0.1.0
MCP protocol
2025-06-18
Tools
5 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": false
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

ChronoGate gives timezone and business-day truth for scheduling agents. Use now, convert, resolve_expression, is_business_day, and add_business_days. Not related to ChronoGate IoT devices.

Tools

5 advertised

now — Now in timezone
Advertised by the server during the last successful anonymous check.
Advertised read-only

Current instant plus wall-clock time in an IANA timezone (e.g. America/Chicago). Includes offset and DST flag.

now input schema
{
  "type": "object",
  "properties": {
    "tz": {
      "type": "string",
      "description": "IANA timezone, default UTC"
    }
  }
}
now annotations
{
  "readOnlyHint": true,
  "openWorldHint": false
}
convert — Convert between timezones
Advertised by the server during the last successful anonymous check.
Advertised read-only

Convert an ISO-8601 instant (or naive local with from=) between IANA zones, handling DST.

convert input schema
{
  "type": "object",
  "required": [
    "iso"
  ],
  "properties": {
    "to": {
      "type": "string",
      "description": "Target IANA zone (default UTC)"
    },
    "iso": {
      "type": "string",
      "description": "ISO-8601 datetime"
    },
    "from": {
      "type": "string",
      "description": "Source IANA zone if iso is naive"
    }
  }
}
convert annotations
{
  "readOnlyHint": true,
  "openWorldHint": false
}
resolve_expression — Resolve relative time expression
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

Resolve expressions like "next Tuesday 3pm", "tomorrow 9am", or "in 2 business days" in a timezone.

resolve_expression input schema
{
  "type": "object",
  "required": [
    "expr",
    "tz"
  ],
  "properties": {
    "tz": {
      "type": "string",
      "description": "IANA timezone"
    },
    "expr": {
      "type": "string"
    },
    "country": {
      "type": "string",
      "description": "ISO country for business-day exprs (default US)"
    }
  }
}
resolve_expression annotations
{
  "readOnlyHint": true,
  "openWorldHint": true
}
is_business_day — Is business day
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

Whether a YYYY-MM-DD date is a business day in a country (weekend + Nager.Date public holidays).

is_business_day input schema
{
  "type": "object",
  "required": [
    "date"
  ],
  "properties": {
    "date": {
      "type": "string",
      "description": "YYYY-MM-DD"
    },
    "country": {
      "type": "string",
      "description": "ISO 3166-1 alpha-2, default US"
    }
  }
}
is_business_day annotations
{
  "readOnlyHint": true,
  "openWorldHint": true
}
add_business_days — Add business days
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

Add N business days to a start date, skipping weekends and public holidays.

add_business_days input schema
{
  "type": "object",
  "required": [
    "start",
    "days"
  ],
  "properties": {
    "days": {
      "type": "integer",
      "description": "Non-negative integer"
    },
    "start": {
      "type": "string",
      "description": "YYYY-MM-DD"
    },
    "country": {
      "type": "string",
      "description": "ISO 3166-1 alpha-2, default US"
    }
  }
}
add_business_days annotations
{
  "readOnlyHint": true,
  "openWorldHint": true
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
412 ms
95th percentile latency
412 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 412 ms · metadata changed · 5 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http chronogate-mcp https://chronogate-self.vercel.app/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add chronogate-mcp --url https://chronogate-self.vercel.app/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable chronogate-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "chronogate-mcp": {
      "url": "https://chronogate-self.vercel.app/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "chronogate-mcp": {
      "type": "streamableHttp",
      "url": "https://chronogate-self.vercel.app/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start chronogate-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "chronogate-mcp": {
      "type": "http",
      "url": "https://chronogate-self.vercel.app/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http chronogate-mcp https://chronogate-self.vercel.app/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.
Claude Desktop configuration
{
  "mcpServers": {
    "chronogate-mcp": {
      "url": "https://chronogate-self.vercel.app/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "chronogate-mcp": {
      "serverUrl": "https://chronogate-self.vercel.app/mcp"
    }
  }
}

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