Deadline Calculator Connector for AI agents.
3 live capabilities
Calculate precise project completion dates across different global regions.
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Why people use Deadline Calculator
Deadline Calculator for accurate multi-region project scheduling.
With this Connector, you just tell your AI client the start date and the duration. It handles the math, skipping the right holidays and weekends automatically. You get a rock-solid completion date without the manual research.
What Vinkius changes
You get accurate, region-aware deadlines without doing any manual calendar math.
Use it from Claude, ChatGPT, Cursor or another AI client you already have.
One account · 5,900+ Connectors
- Real-world use case 01
Skipping US holidays for project planning
A project manager needs to know the end date for a 20-day task starting in July.
- Real-world use case 02
Booking a vacation and checking return dates
A freelancer is booking a 2-week vacation and needs to know when they'll return.
- Real-world use case 03
Identifying German office closures
A team is planning a launch in Germany.
Complete set · 3capabilities
The complete Deadline Calculator capability set.
These are the exact actions your AI can choose when you ask it to work with Deadline Calculator.
01—03
3 capabilities in this set.
Part of 3 available through Deadline Calculator.
- 01 Capability
Business deadline capability
Calculates a deadline by adding business days to a start date while skipping weekends and regional holidays.
- 02 Capability
Calendar deadline capability
Determines an end date by adding a set number of uninterrupted calendar days to a starting point.
- 03 Capability
Holiday registry capability
Pulls a list of recognized public holidays for a specific country and year to verify dates.
Set up in minutes
One URL. Then ask Deadline Calculator to work.
Claude and ChatGPT only need the Connector URL. Copy it once, add it in settings, and use Deadline Calculator from the conversation.
Choose your client
Live previewAdvanced clients IDE · CLI
Claude · Web + desktop
Connector URL · ready to paste
Streamable HTTPhttps://edge.vinkius.com/vk_preview_wXHcMc6mvs6PJNtadmhUMeWcfHpR3eLXsUt2UrOD/mcp - Step 01
Open Connectors
In Claude Web or Claude Desktop, open Settings and choose Connectors.
- Step 02
Add the URL
Choose Add custom connector, name it Deadline Calculator, and paste the URL above.
- Step 03
Turn it on in chat
Select +, open Connectors, and enable Deadline Calculator for the conversation.
ChatGPT · Web + desktop
Connector URL · ready to paste
Streamable HTTPhttps://edge.vinkius.com/vk_preview_wXHcMc6mvs6PJNtadmhUMeWcfHpR3eLXsUt2UrOD/mcp - Step 01
Open MCP settings
On desktop, open Settings and MCP servers. On web, open your workspace app or connector settings.
- Step 02
Add the URL
Choose Add server with Streamable HTTP, or create a custom MCP app, then paste the Deadline Calculator URL.
- Step 03
Save and start
Save the connection and enable Deadline Calculator in your conversation. Desktop may ask you to restart once.
Cursor · IDE configuration
Advanced setup
{
"mcpServers": {
"deadline-calculator": {
"url": "https://edge.vinkius.com/vk_preview_wXHcMc6mvs6PJNtadmhUMeWcfHpR3eLXsUt2UrOD/mcp"
}
}
}- Step 01
Open MCP Settings
Press Cmd+Shift+P (macOS) or Ctrl+Shift+P (Windows/Linux) → search "MCP Settings"
- Step 02
Add the server config
Paste the JSON configuration above into the mcp.json file that opens
- Step 03
Save the file
Cursor will automatically detect the new Connector
- Step 04
Start using Deadline Calculator
Open Agent mode in chat and ask: "Using Deadline Calculator, help me...". 3 tools available
VS Code Copilot · IDE configuration
Advanced setup
{
"mcpServers": {
"deadline-calculator": {
"url": "https://edge.vinkius.com/vk_preview_wXHcMc6mvs6PJNtadmhUMeWcfHpR3eLXsUt2UrOD/mcp"
}
}
}- Step 01
Create MCP config
Create a .vscode/mcp.json file in your project root
- Step 02
Add the server config
Paste the JSON configuration above
- Step 03
Enable Agent mode
Open GitHub Copilot Chat and switch to Agent mode using the dropdown
- Step 04
Start using Deadline Calculator
Ask Copilot: "Using Deadline Calculator, help me...". 3 tools available
Windsurf · IDE configuration
Advanced setup
{
"mcpServers": {
"deadline-calculator": {
"url": "https://edge.vinkius.com/vk_preview_wXHcMc6mvs6PJNtadmhUMeWcfHpR3eLXsUt2UrOD/mcp"
}
}
}- Step 01
Open MCP Settings
Go to Settings → MCP Configuration or press Cmd+Shift+P and search "MCP"
- Step 02
Add the server
Paste the JSON configuration above into mcp_config.json
- Step 03
Save and reload
Windsurf will detect the new server automatically
- Step 04
Start using Deadline Calculator
Open Cascade and ask: "Using Deadline Calculator, help me...". 3 tools available
Cline · IDE configuration
Advanced setup
{
"mcpServers": {
"deadline-calculator": {
"url": "https://edge.vinkius.com/vk_preview_wXHcMc6mvs6PJNtadmhUMeWcfHpR3eLXsUt2UrOD/mcp"
}
}
}- Step 01
Open Cline MCP Settings
Click the Connectors icon in the Cline sidebar panel
- Step 02
Add remote server
Click "Add Connector" and paste the configuration above
- Step 03
Enable the server
Toggle the server switch to ON
- Step 04
Start using Deadline Calculator
Ask Cline: "Using Deadline Calculator, help me...". 3 tools available
Claude Code · Terminal command
Advanced setup
claude mcp add deadline-calculator --transport http "https://edge.vinkius.com/vk_preview_wXHcMc6mvs6PJNtadmhUMeWcfHpR3eLXsUt2UrOD/mcp"- Step 01
Install Claude Code
Run npm install -g @anthropic-ai/claude-code if not already installed
- Step 02
Add the Connector
Run the command above in your terminal
- Step 03
Verify the connection
Run claude mcp to list connected servers, or type /mcp inside a session
- Step 04
Start using Deadline Calculator
Ask Claude: "Using Deadline Calculator, show me...". 3 tools are ready
Where the request belongs
Work Deadline Calculator can move forward.
This is for project managers, freelancers, and ops leads who juggle multi-region deadlines and hate the risk of missing a holiday.
Project Manager
Checking if a 14-day sprint ends on a working day in the UK.
Freelance Developer
Giving clients accurate delivery dates for international projects.
HR Coordinator
Planning company-wide deadlines across different European offices.
Build the capability set
Add more capabilities.
Each Connector adds new actions and data without changing how you work.
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Eradicate LLM scheduling errors. Calculate exact business days skipping global public holidays and convert precise timezones flawlessly.
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Calculate precise intervals between two dates in years, months, weeks, and days.
Deterministic Datetime Engine
Equip your AI with exact temporal math. Deterministically calculate date differences, leap years, and add business days (skipping weekends) 100% locally.
Business Day Calculator
Calculate workdays, holidays, and business day ranges across 50+ countries.
Bring your own AI
Change the model, client or framework. Keep Deadline Calculator connected.
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Claude -
ChatGPT -
Gemini -
Cursor -
VS Code -
Windsurf -
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Cline -
Zed -
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Vercel AI SDK
Before you connect
Questions about Deadline Calculator.
The practical details behind the request, access and result.
How does the Deadline Calculator MCP handle different countries?
It knows the specific holiday registries for the US, UK, Germany, and France. When you ask for a business day deadline, it automatically skips the correct holidays for that region.
Can I use this to find out when a project will finish if I skip weekends?
Yes. You can tell your AI client to calculate a deadline using only business days. It will automatically skip Saturdays and Sundays to give you a real-world completion date.
Does the Deadline Calculator MCP support every country's holidays?
It currently supports the US, UK, Germany, and France. For other regions, you can still use it to add standard calendar days or business days without holiday offsets.
How accurate are the holiday dates?
The capability uses a dedicated registry to pull recognized public holidays for specific years. It's much more reliable than an AI's general knowledge, which can sometimes get dates wrong.
Can I calculate a deadline that includes weekends?
Yes, you can use the calendar day capability for that. It adds uninterrupted days to your start date, which is perfect for tasks that don't stop for the weekend.
Will this help my team stay on track with international deadlines?
Exactly. It removes the risk of accidentally setting a deadline on a day a regional office is closed, ensuring your global team always has realistic targets.
How does the business day calculation work?
The business_deadline_tool iterates through each day starting from your start date. It only increments the count when it encounters a day that is not a weekend (Saturday or Sunday) and not a holiday listed in the registry for your chosen region.
Which regions are supported for holidays?
Currently, the server supports holiday registries for the United States (US), United Kingdom (GB), Germany (DE), and France (FR).
Can I verify specific holiday dates?
Yes, you can use the holiday_registry_tool to fetch a complete list of recognized holidays for any supported region and year.
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