The Openworkdays MCP server,
connected in one click.
Zero-signup business-day date-math API: add days, count days between dates, is-business-day. Connect the official Openworkdays MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add Openworkdays to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http openworkdays https://openworkdays.vercel.app/api/mcpRun in your terminal, then restart Claude Code.
Openworkdays · https://openworkdays.vercel.app/api/mcp
What your AI can do with Openworkdays
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “businessdays”: Business-day date math. Three modes inferred from params: add (start+days -> the date N business days away, negative days = before), diff (s.”
How secure is the Openworkdays MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Openworkdays holds up.
Security grade B
gate scanned 1 tools on Sep 3, 2026. A few things are worth a look before you connect.
- mediumbusinessdays: References secrets or data exfiltration
Official endpoint
Operated by Openworkdays (vercel.app) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If Openworkdays adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick Openworkdays
Choose Openworkdays in the gate directory. No sign-in needed.
Use it anywhere
Openworkdays's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools Openworkdays exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
businessdays — Business-day date math. Three modes inferred from params: add (start+days -> the date N business days away, negative days = before), diff (s
Who runs the Openworkdays MCP server?
The Openworkdays MCP server at a glance
https://openworkdays.vercel.app/api/mcpQuestions, answered
Is there an official Openworkdays MCP server?
Yes — Openworkdays operates its own remote MCP server at openworkdays.vercel.app. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect Openworkdays to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick Openworkdays in the directory. No account or sign-in is needed. From then on, Openworkdays's tools are available in every client you've connected to gate.
Do I need to host anything?
No. Openworkdays runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the Openworkdays MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect Openworkdays in minutes. No credit card required.
Connect more than just Openworkdays
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up Openworkdays in: Claude · Claude Code · ChatGPT · Cursor · VS Code