How does this MCP handle weekends?

The add_business_days capability specifically skips Saturdays and Sundays when calculating new dates.

Is the date math accurate?

Yes. It uses a strict V8 Javascript engine to perform mathematical calculations rather than relying on the LLM to guess.

Which AI clients can use this?

You can use this with any MCP-compatible client, including Claude, Cursor, Windsurf, and VS Code.

Does this require an external API?

No. The calculations execute locally, which means there is no external API latency.

Can it handle leap years?

Yes. The check_leap_year capability uses the exact Gregorian calendar algorithm to verify leap years.

Why use an MCP for adding days to a date?

AI models predict tokens, they don't "compute" calendars. When crossing months (e.g., February 28th to March 1st) or calculating Business Days, LLMs hallucinate dates frequently. This MCP forces exact algorithmic execution.

Are public holidays supported?

Currently, add_business_days only skips weekends (Saturdays and Sundays). True holiday calculation requires country-specific data which violates the zero-dependency nature of this core utility.

Is this capability secure and local?

Yes. It executes 100% locally using standard Date parsing built into V8. No cloud dependencies or API calls are used.

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Connect Deterministic Datetime Engine to ChatGPT and Claude

Set it up once and it works in ChatGPT, Claude, Cursor, and any other client you love. It all runs safely in the background, so you can relax and focus on what really matters. Give your AI agent the ability to calculate dates without errors.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

Waiting for input…

Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

Your AI does the work. We keep it safe and sound.

No other AI tool gives you this. Your workflow runs in the client you already love, your account stays protected, and you decide what the agent can and cannot do. It is the whole reason to make the switch.

Each Connector lives inside our infrastructure, the same place where your workflow runs. The three things below are already part of it, working quietly in the background so you never have to think about them. Nothing to add, nothing to set up, nothing to worry about.

V8 Isolate01

Each Connector runs inside its own sealed environment.

Each Connector runs inside its own sealed V8 runtime — no access to your files, your system, or other servers. A Connector never sees past its own request.

Kill Switch02

One switch stops every agent. Instantly.

One action deactivates every Connector, revokes every token, and ends every session at once. AI Governance keeps the record.

FinOps per User03

Spending limits that pause instead of surprise.

Every user keeps their own connections and credentials, isolated from everyone else. Anything that would cross your spending limit is held for your approval, not billed.

Three controls, built into the layer your AI connects through.

Curated set · 3 capabilities

We ship only the actions that matter.

Capability set01 / 01

01-03

3 capabilities in this set.

Part of 3 available through Deterministic Datetime Engine.

01
Calculate date difference
This capability calculates the exact mathematical difference between two specific dates. It returns the total number of days, months, and years passed.
02
Check leap year
This capability checks if a given year is a leap year. It uses the standard Gregorian calendar algorithm to ensure accuracy.
03
Add business days
This capability adds or subtracts a set number of business days from a date. It automatically skips Saturdays and Sundays to ensure the result is correct.

Real work

What teams actually run

SLA Management

Calculate exact response deadlines by adding business days to a ticket creation date.

Billing Cycles

Determine precise billing intervals and subscription end dates.

Logistics Planning

Estimate delivery windows by accounting for non-business days.

Financial Auditing

Verify the exact number of days between transactions for interest or compliance checks.

Automate a task

Put Deterministic Datetime Engine to work on one thing.

Step-by-step automations your AI runs through this Connector: the workflow, the prompts to start with, and the exact capabilities behind each move.

One connector, every AI

Deterministic Datetime Engine works with the most popular AI clients.

These are the most popular clients, each with a step-by-step guide: one link, set up once, with governance and visibility built in. And because everything runs on the MCP standard, the same connection also works in any other compatible client — nothing to rebuild.

Building your own app? The connector is yours to use.

You don't need a client to put Deterministic Datetime Engine to work: the same hosted connection plugs into your own applications and agent code, with the same governance on every request. Build with it, chat with it — one connection for both.

Observed, not estimated

904ms average. Fast in production.

Deterministic Datetime Engine is checked daily against the live service.

Daily averagePeak 1061ms

Oct 3Today

Fastest day: 640ms
Slowest day: 1061ms
14-day trend: Slowing+5%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 3 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of Deterministic Datetime Engine, so you can see the experience inside your AI.

It does not authenticate your account with Deterministic Datetime Engine. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

Deterministic Datetime Engine Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_vEhbg6uTTW1p8gyIoIpVlcSHsqKC4FlupxGbhPUS/mcp

Claude Desktop

Follow the steps below to connect in seconds.

1In Claude Desktop, open Settings → Connectors.
2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
3Click Add and start a new chat — Deterministic Datetime Engine capabilities are ready to use.

Configuration · claude_desktop_config.jsonCopy

{
  "mcpServers": {
    "deterministic-datetime-engine-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_vEhbg6uTTW1p8gyIoIpVlcSHsqKC4FlupxGbhPUS/mcp"
    }
  }
}

Claude
ChatGPT
Cursor
VS Code
Windsurf
Claude Code
JetBrains
Cline

Step-by-step instructions for each client are in the guide. How to connect

Guided setup for Claude? Set up Deterministic Datetime Engine in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work Deterministic Datetime Engine owners hand off.

This MCP is built for anyone building agents that need to manage schedules, deadlines, or financial cycles without math errors.

01
Project Managers
They hand off deadline calculations and project timeline adjustments to their AI agents.
02
Software Engineers
They use it to ensure their AI-driven automation capabilities handle date logic correctly.
03
Operations Specialists
They rely on it for accurate SLA tracking and billing cycle math.

FAQ

Questions Deterministic Datetime Engine owners ask.

01
How does this MCP handle weekends?
The add_business_days capability specifically skips Saturdays and Sundays when calculating new dates.
02
Is the date math accurate?
Yes. It uses a strict V8 Javascript engine to perform mathematical calculations rather than relying on the LLM to guess.
03
Which AI clients can use this?
You can use this with any MCP-compatible client, including Claude, Cursor, Windsurf, and VS Code.
04
Does this require an external API?
No. The calculations execute locally, which means there is no external API latency.
05
Can it handle leap years?
Yes. The check_leap_year capability uses the exact Gregorian calendar algorithm to verify leap years.
06
Why use an MCP for adding days to a date?
AI models predict tokens, they don't "compute" calendars. When crossing months (e.g., February 28th to March 1st) or calculating Business Days, LLMs hallucinate dates frequently. This MCP forces exact algorithmic execution.
07
Are public holidays supported?
Currently, add_business_days only skips weekends (Saturdays and Sundays). True holiday calculation requires country-specific data which violates the zero-dependency nature of this core utility.
08
Is this capability secure and local?
Yes. It executes 100% locally using standard Date parsing built into V8. No cloud dependencies or API calls are used.

Explore

More in Productivity

Connect Deterministic Datetime Engine to Claude, Cursor, ChatGPT & more

Your AI does the work. We keep it safe and sound.

Each Connector runs inside its own sealed environment.

One switch stops every agent. Instantly.

Spending limits that pause instead of surprise.

We ship only the actions that matter.

01-03

Calculate date difference

Check leap year

Add business days

What teams actually run

SLA Management

Billing Cycles

Logistics Planning

Financial Auditing

Building your own app? The connector is yours to use.

Deterministic Datetime Engine Connector

Claude Desktop

Project Managers

Software Engineers

Operations Specialists

How does this MCP handle weekends?

Is the date math accurate?

Which AI clients can use this?

Does this require an external API?

Can it handle leap years?

Why use an MCP for adding days to a date?

Are public holidays supported?

Is this capability secure and local?

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