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io.github.lazymac2x/cron-parser

by lazymac2x · remote · no sign-in to list tools · v1.0.0 · published by GitHub user lazymac2x

Cloudflare Workers MCP server: cron-parser

Changes · 2
CompareRegistry entry

6 tools: 2 change things and 4 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http cron-parser https://api.lazy-mac.com/cron-parser/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

6 tools

Changes things 2Claude Code: ask
  • generate_cronGenerate a cron expression from human-friendly options.No findings

    Why it is in this group

    • The name "generate_cron" says "generate": a word for a change.
    Description, as the server wrote it
    Generate a cron expression from human-friendly options.
  • next_runsGet the next N scheduled run times for a cron expression.No findings

    Why it is in this group

    • The name "next_runs" says "run": a word for a change.
    Description, as the server wrote it
    Get the next N scheduled run times for a cron expression. Uses standard Unix OR semantics for day fields.
Only reads 4Claude Code: allow
  • common_cronsList commonly used cron expressions with descriptions.No findings

    Why it is in this group

    • The description's first verb is "list": a word for reading.
    Description, as the server wrote it
    List commonly used cron expressions with descriptions.
  • diff_cronCompare two cron expressions and return per-field differences.No findings

    Why it is in this group

    • The name "diff_cron" says "diff": a word for reading.
    Description, as the server wrote it
    Compare two cron expressions and return per-field differences.
  • explain_cronExplain a cron expression in human-readable form and show parsed fields.No findings

    Why it is in this group

    • The name "explain_cron" says "explain": a word for reading.
    Description, as the server wrote it
    Explain a cron expression in human-readable form and show parsed fields. Supports @presets like @daily, @weekly.
  • validate_cronCheck if a cron expression is valid.No findings

    Why it is in this group

    • The name "validate_cron" says "validate": a word for reading.
    Description, as the server wrote it
    Check if a cron expression is valid. Returns {valid: bool, error?: string}.

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http cron-parser https://api.lazy-mac.com/cron-parser/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__cron-parser__explain_cron",
      "mcp__cron-parser__validate_cron",
      "mcp__cron-parser__diff_cron",
      "mcp__cron-parser__common_crons"
    ],
    "ask": [
      "mcp__cron-parser__next_runs",
      "mcp__cron-parser__generate_cron"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as cron-parser. Review it before you use it.