date-fns Connector for AI agents.
1 live capability
Calculate precise court filing dates and procedural deadlines without math errors.
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Why people use date-fns
Legal Deadline Calculator Engine for Procedural Filing Accuracy
This engine handles the heavy lifting. Your agent takes the starting date and the day count, then returns the exact deadline. You get a reliable source of truth for every filing.
What Vinkius changes
That your agent stops guessing and starts calculating exact legal dates.
Use it from Claude, ChatGPT, Cursor or another AI client you already have.
One account · 5,900+ Connectors
- Real-world use case 01
Filing an Appeal
A user tells the agent a subpoena was served on May 15th.
- Real-world use case 02
Holiday Planning
A paralegal needs to know a deadline starting Oct 10th, skipping a specific national holiday on the 12th.
- Real-world use case 03
High-Volume Intake
An intake agent processes dozens of new cases a day and automatically logs the first response deadline based on a business day count.
Complete set · 1capability
The complete date-fns capability set.
These are the exact actions your AI can choose when you ask it to work with date-fns.
01
1 capability in this set.
Part of 1 available through date-fns.
- 01 Capability
Calculate legal deadline
Calculates exact procedural deadlines in business days, skipping weekends and optional holidays. It ensures your agent returns a mathematically certain date every time.
Set up in minutes
One URL. Then ask date-fns to work.
Claude and ChatGPT only need the Connector URL. Copy it once, add it in settings, and use date-fns 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_F8QakyPQ2iwGwcaM4ypH2i09iICzxyXl1oCkAoNB/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 date-fns, and paste the URL above.
- Step 03
Turn it on in chat
Select +, open Connectors, and enable date-fns for the conversation.
ChatGPT · Web + desktop
Connector URL · ready to paste
Streamable HTTPhttps://edge.vinkius.com/vk_preview_F8QakyPQ2iwGwcaM4ypH2i09iICzxyXl1oCkAoNB/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 date-fns URL.
- Step 03
Save and start
Save the connection and enable date-fns in your conversation. Desktop may ask you to restart once.
Cursor · IDE configuration
Advanced setup
{
"mcpServers": {
"legal-deadline-calculator-engine": {
"url": "https://edge.vinkius.com/vk_preview_F8QakyPQ2iwGwcaM4ypH2i09iICzxyXl1oCkAoNB/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 date-fns
Open Agent mode in chat and ask: "Using date-fns, help me...". 1 tools available
VS Code Copilot · IDE configuration
Advanced setup
{
"mcpServers": {
"legal-deadline-calculator-engine": {
"url": "https://edge.vinkius.com/vk_preview_F8QakyPQ2iwGwcaM4ypH2i09iICzxyXl1oCkAoNB/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 date-fns
Ask Copilot: "Using date-fns, help me...". 1 tools available
Windsurf · IDE configuration
Advanced setup
{
"mcpServers": {
"legal-deadline-calculator-engine": {
"url": "https://edge.vinkius.com/vk_preview_F8QakyPQ2iwGwcaM4ypH2i09iICzxyXl1oCkAoNB/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 date-fns
Open Cascade and ask: "Using date-fns, help me...". 1 tools available
Cline · IDE configuration
Advanced setup
{
"mcpServers": {
"legal-deadline-calculator-engine": {
"url": "https://edge.vinkius.com/vk_preview_F8QakyPQ2iwGwcaM4ypH2i09iICzxyXl1oCkAoNB/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 date-fns
Ask Cline: "Using date-fns, help me...". 1 tools available
Claude Code · Terminal command
Advanced setup
claude mcp add legal-deadline-calculator-engine --transport http "https://edge.vinkius.com/vk_preview_F8QakyPQ2iwGwcaM4ypH2i09iICzxyXl1oCkAoNB/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 date-fns
Ask Claude: "Using date-fns, show me...". 1 tools are ready
Where the request belongs
Work date-fns can move forward.
This is for legal professionals who can't afford a single day of error. It's for the paralegal managing a massive docket and the developer building high-stakes legal automation.
Legal Paralegal
Manages high volumes of court filings and needs to ensure every deadline is met without manual double-checking.
Litigation Attorney
Tracks multiple case timelines and needs to quickly identify next steps for diverse clients.
Legal Tech Developer
Builds automated workflows for law firms and needs a reliable way to handle calendar logic.
Build the capability set
Add more capabilities.
Each Connector adds new actions and data without changing how you work.
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Stop LLMs from calculating SLAs incorrectly. An local, deterministic engine that adds business days while perfectly avoiding weekends and Brazilian national holidays.
Deadline Calculator
Calculate precise end dates by adding calendar or business days, accounting for weekends and regional holidays.
Days Between Dates Calculator
Calculate precise intervals between two dates in years, months, weeks, and days.
US Filing Deadline Calculator
Calculate US federal court filing deadlines with automatic weekend and holiday adjustments.
Date Utils Engine
Stop AI from hallucinating dates, missing leap years, or failing timezone conversions. Offloads all calendar math to the deterministic date-fns engine.
Bring your own AI
Change the model, client or framework. Keep date-fns connected.
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Claude -
ChatGPT -
Gemini -
Cursor -
VS Code -
Windsurf -
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Cline -
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Vercel AI SDK
Before you connect
Questions about date-fns.
The practical details behind the request, access and result.
Can the Legal Deadline Calculator Engine handle different state holidays?
Yes. You can provide a specific list of dates to skip when you run a calculation. This ensures the agent respects local laws and regional holidays.
How does this prevent my AI agent from making mistakes?
It moves the math from the AI's memory to a dedicated calculation engine. It uses deterministic logic, so it won't hallucinate dates or skip weekends by mistake.
Does the Legal Deadline Calculator Engine work with international dates?
It processes standard ISO dates. As long as your agent provides the date in a standard format, the engine will calculate the correct business day count.
Can I use this for non-legal business deadlines?
Absolutely. While built for the legal industry, any workflow that requires counting business days while skipping specific holidays can use this capability.
What happens if I don't provide a holiday list?
The engine will skip weekends by default. If you don't provide a holiday list, it will only count Monday through Friday as business days.
Is this capability safe for high-stakes court filings?
It's designed specifically for that. By using a deterministic engine rather than an LLM's guess, you get a mathematically certain result every time.
Does it automatically know all holidays?
No, to remain globally deterministic and local, the agent must pass an array of specific holiday dates (e.g., local state holidays) to be skipped during the count.
Does it count the start date?
No. In accordance with most civil procedural rules (like the Brazilian CPC), the count begins on the first business day after the start date.
Is this secure for client data?
Absolutely. The engine executes locally within the Vinkius Edge runtime, meaning no deadline inquiries are sent to external APIs.
One connection away
Give your agent a direct line to date-fns.
Connect date-fns once. Keep it beside 5,900+ managed Connectors when the next task needs more.
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