Cron Validator Connector for AI agents.

Q: How can I check if my cron string is correct with Cron Expression Validator & Next Run Calculator?

You simply provide the string to your AI client. The tool checks the syntax and tells you immediately if it is valid or contains errors.

Q: How can I see when my next task will run?

You can use the getnextruns tool by providing your cron expression and a starting timestamp.

Q: Can it detect invalid dates in a cron string?

Yes, validatecron will flag logically impossible expressions like February 30th.

3 live capabilities

Verify cron syntax and predict future task execution times

Live agent request Cron Validator / Connector

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AI Agent

Why people use Cron Validator

Stop breaking production with Cron Expression Validator & Next Run Calculator errors

With this MCP, you just ask your agent to check the string. It gives you an empty-handed answer on whether the syntax is right or if the date even exists. You get certainty instead of hope.

What Vinkius changes

You stop guessing about your automation schedules.

Use it from Claude, ChatGPT, Cursor or another AI client you already have.

One account · 6,100+ Connectors

Real-world use case 01

Fixing broken pipelines

A developer notices a task isn't running and asks the agent to check the cron string for errors.
Real-world use case 02

Verifying new deployments

An engineer uses the validator to ensure a new schedule won't crash the system.
Real-world use case 03

Auditing large schedules

An ops lead asks the agent to list all upcoming runs for a set of critical tasks.

Complete set · 3capabilities

The complete Cron Validator capability set.

These are the exact actions your AI can choose when you ask it to work with Cron Validator.

Capability set01 / 01

01—03

3 capabilities in this set.

Part of 3 available through Cron Validator.

01 Capability
Get next runs
Generates a list of upcoming execution timestamps for any valid cron expression.
02 Capability
Inspect expression
Breaks down a complex cron string into simple, human-readable parts.
03 Capability
Validate cron
Checks if a cron expression is syntactically correct and logically possible.

Set up in minutes

One URL. Then ask Cron Validator to work.

Claude and ChatGPT only need the Connector URL. Copy it once, add it in settings, and use Cron Validator from the conversation.

Choose your client

Live preview

Advanced clients IDE · CLI

Claude · Web + desktop

Official guide ↗

Connector URL · ready to paste

Streamable HTTP

https://edge.vinkius.com/vk_preview_azeipbwG8DN5DThWMywDx4D6XKPmifpb2gea1Ujk/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 Cron Validator, and paste the URL above.
Step 03

Turn it on in chat

Select +, open Connectors, and enable Cron Validator for the conversation.

ChatGPT · Web + desktop

Official guide ↗

Connector URL · ready to paste

Streamable HTTP

https://edge.vinkius.com/vk_preview_azeipbwG8DN5DThWMywDx4D6XKPmifpb2gea1Ujk/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 Cron Validator URL.
Step 03

Save and start

Save the connection and enable Cron Validator in your conversation. Desktop may ask you to restart once.

Cursor · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "cron-expression-validator-next-run-calculator": {
      "url": "https://edge.vinkius.com/vk_preview_azeipbwG8DN5DThWMywDx4D6XKPmifpb2gea1Ujk/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 Cron Validator

Open Agent mode in chat and ask: "Using Cron Validator, help me...". 3 tools available

VS Code Copilot · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "cron-expression-validator-next-run-calculator": {
      "url": "https://edge.vinkius.com/vk_preview_azeipbwG8DN5DThWMywDx4D6XKPmifpb2gea1Ujk/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 Cron Validator

Ask Copilot: "Using Cron Validator, help me...". 3 tools available

Windsurf · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "cron-expression-validator-next-run-calculator": {
      "url": "https://edge.vinkius.com/vk_preview_azeipbwG8DN5DThWMywDx4D6XKPmifpb2gea1Ujk/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 Cron Validator

Open Cascade and ask: "Using Cron Validator, help me...". 3 tools available

Cline · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "cron-expression-validator-next-run-calculator": {
      "url": "https://edge.vinkius.com/vk_preview_azeipbwG8DN5DThWMywDx4D6XKPmifpb2gea1Ujk/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 Cron Validator

Ask Cline: "Using Cron Validator, help me...". 3 tools available

Claude Code · Terminal command

Official guide ↗

Advanced setup

claude mcp add cron-expression-validator-next-run-calculator --transport http "https://edge.vinkius.com/vk_preview_azeipbwG8DN5DThWMywDx4D6XKPmifpb2gea1Ujk/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 Cron Validator

Ask Claude: "Using Cron Validator, show me...". 3 tools are ready

Where the request belongs

Work Cron Validator can move forward.

Built around the request

DevOps engineers, automation specialists, and backend developers who manage recurring tasks and need to ensure their scheduling logic is flawless.

DevOps Engineer

Verifying cron strings in deployment scripts to prevent broken production pipelines.

Automation Specialist

Auditing large sets of scheduled tasks to ensure they trigger at the correct intervals.

Backend Developer

Checking complex cron patterns for accuracy before committing them to the codebase.

Build the capability set

Each Connector adds new actions and data without changing how you work.

Browse Connectors

01 3 capabilities New

Cron Expression Validator & Next Run Calculator Alternative

Validate cron syntax and calculate exact future execution timestamps.

View Connector

02 3 capabilities

Cron Expression Validator

Validate and calculate next execution times for standard and extended cron expressions.

View Connector

03 4 capabilities

Cron Expression Parser

Validate, interpret, and calculate execution schedules from cron expressions.

View Connector

04 4 capabilities

Cron Expression Engine

Parse, validate, convert, and generate cron expressions across multiple standards.

View Connector

05 3 capabilities

Deterministic Cron Schedule Engine

Equip your AI with precise cron job parsing. Deterministically translate cron to natural language, format schedules, and calculate exact next execution times.

View Connector

06 1 capability

Cron Expression Calculator

Calculate the exact future dates of any Cron expression using deterministic JavaScript. Stop LLMs from failing date mathematics and leap year edge cases.

View Connector

Bring your own AI

Change the model, client or framework. Keep Cron Validator connected.

Claude
ChatGPT
Gemini
Cursor
VS Code
Windsurf
ZCode
Cline
Zed
Continue
Kiro
Roo Code
Zencoder
Goose
Void
Augment Code
Amp
Qodo
Tabnine
Pieces
Sourcegraph Cody
JetBrains
Warp
Amazon Q
Antigravity
BoltAI
Raycast
Jan
LM Studio
AnythingLLM
Open WebUI
Msty
Cherry Studio
LibreChat
TypingMind
Chorus
5ire
n8n
LangChain
LlamaIndex
CrewAI
Vercel AI SDK

Before you connect

Questions about Cron Validator.

The practical details behind the request, access and result.

How can I check if my cron string is correct with Cron Expression Validator & Next Run Calculator?

You simply provide the string to your AI client. The capability checks the syntax and tells you immediately if it is valid or contains errors.

Can Cron Expression Validator & Next Run Calculator predict future task runs?

Yes, it can generate a list of upcoming timestamps so you know exactly when your automation will trigger.

Does Cron Expression Validator & Next Run Calculator handle complex cron patterns?

It does. It can break down even the most complicated expressions into plain English so they are easy to understand.

Will Cron Expression Validator & Next Run Calculator catch invalid dates?

Yes, it specifically flags impossible dates like February 30th or April 31st to prevent scheduling errors.

Is Cron Expression Validator & Next Run Calculator compatible with Claude or Cursor?

Yes, you can connect this MCP to any compatible client like Claude, Cursor, or Windsurf to use it in your workflow.

Does it support 6-field cron expressions?

Yes, the server supports both standard 5-field and extended 6-field cron formats.

How can I see when my next task will run?

You can use the get_next_runs capability by providing your cron expression and a starting timestamp.

Can it detect invalid dates in a cron string?

Yes, validate_cron will flag logically impossible expressions like February 30th.

One connection away

Give your agent a direct line to Cron Validator.

Connect Cron Validator once. Keep it beside 6,100+ managed Connectors when the next task needs more.

Explore every Connector No credit card required · Free tier available

Stop breaking production with Cron Expression Validator & Next Run Calculator errors

You stop guessing about your automation schedules.

Fixing broken pipelines

Verifying new deployments

Auditing large schedules

Get next runs

Inspect expression

Validate cron

Open Connectors

Add the URL

Turn it on in chat

Open MCP settings

Add the URL

Save and start

Open MCP Settings

Add the server config

Save the file

Start using Cron Validator

Create MCP config

Add the server config

Enable Agent mode

Start using Cron Validator

Open MCP Settings

Add the server

Save and reload

Start using Cron Validator

Open Cline MCP Settings

Add remote server

Enable the server

Start using Cron Validator

Install Claude Code

Add the Connector

Verify the connection

Start using Cron Validator

DevOps Engineer

Automation Specialist

Backend Developer

Cron Expression Validator & Next Run Calculator Alternative

Cron Expression Validator

Cron Expression Parser

Cron Expression Engine

Deterministic Cron Schedule Engine

Cron Expression Calculator

Give your agent a direct line to Cron Validator.