Bizday MCP

An MCP server that allows agents to check, add, count, and roll business days using various US federal, banking, and market calendars without requiring an API key.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-20Operated by isitabizday.com

MCP endpoint (Streamable HTTP)

https://isitabizday.com/mcp

Vendor documentation

What you can do with it

Check if a specific date is a US federal office business day
Count business days between two dates on a selected calendar
Add a number of business days to a start date
Roll a date to the next or previous business day

Tools advertised by the last live check:

list_calendars
list_holidays
is_business_day
add_business_days
count_business_days
roll_date
frcp_6a_deadline
report_discrepancy

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 a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http bizday-mcp https://isitabizday.com/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 bizday-mcp --url https://isitabizday.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable bizday-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "bizday-mcp": {
      "url": "https://isitabizday.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "bizday-mcp": {
      "type": "streamableHttp",
      "url": "https://isitabizday.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start bizday-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "bizday-mcp": {
      "type": "http",
      "url": "https://isitabizday.com/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 bizday-mcp https://isitabizday.com/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": {
    "bizday-mcp": {
      "url": "https://isitabizday.com/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": {
    "bizday-mcp": {
      "serverUrl": "https://isitabizday.com/mcp"
    }
  }
}

Ground your agent in cited data

Bizday MCP gives your agent tools. Koskamo gives it reviewed, cited facts to check its answers against. Add it as a second MCP server; public reads need no API key.

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