MCP server

Openworkdays

io.github.SolvoHQ/openworkdays

Checked 25 Oct 2026, 20:29 UTC · Connected to it and listed its tools

Zero-signup business-day date-math API: add days, count days between dates, is-business-day.

Working at last checkAbout 295 tokens per request once connected1 tools

https://openworkdays.vercel.app/api/mcp

At a glance

Type: MCP server
Publisher: Not verified
Status: Working at last check
Tools: 1
Token cost: About 295 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 25 Oct 2026, 20:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http openworkdays https://openworkdays.vercel.app/api/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.openworkdays]
url = "https://openworkdays.vercel.app/api/mcp"

Gemini CLI

{"mcpServers":{"openworkdays":{"httpUrl":"https://openworkdays.vercel.app/api/mcp"}}}

Cursor

{"mcpServers":{"openworkdays":{"url":"https://openworkdays.vercel.app/api/mcp"}}}

VS Code

{"servers":{"openworkdays":{"type":"http","url":"https://openworkdays.vercel.app/api/mcp"}}}

Antigravity

agy mcp add openworkdays https://openworkdays.vercel.app/api/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"openworkdays","server_url":"https://openworkdays.vercel.app/api/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"openworkdays","server_url":"https://openworkdays.vercel.app/api/mcp"}

businessdays ~295 tokens
Business-day date math. Three modes inferred from params: add (start+days -> the date N business days away, negative days = before), diff (start+end -> count of business days between, inclusive of both endpoints), is (date -> is it a business day). Optional weekend (default sat,sun) and holidays (co

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