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MCP Server

cron-parser

io.github.lazymac2x/cron-parser
Developer Tools Public & reachable MCP 2026-07-28

What this MCP does

Validates, explains, compares, generates, and calculates upcoming runs for cron expressions.

Capabilities

Tools

6 tools
common_crons
List commonly used cron expressions with descriptions.
Input schema 
{'type': 'object', 'properties': {}}
diff_cron
Compare two cron expressions and return per-field differences.
Input schema 
{'type': 'object', 'required': ['first', 'second'], 'properties': {'first': {'type': 'string', 'description': 'First cron expression'}, 'second': {'type': 'string', 'description': 'Second cron expression'}}}
explain_cron
Explain a cron expression in human-readable form and show parsed fields. Supports @presets like @daily, @weekly.
Input schema 
{'type': 'object', 'required': ['expression'], 'properties': {'expression': {'type': 'string', 'description': 'Cron expression (e.g. "*/5 * * * *" or "@daily")'}}}
generate_cron
Generate a cron expression from human-friendly options.
Input schema 
{'type': 'object', 'required': ['every'], 'properties': {'at': {'type': 'object', 'properties': {'hour': {'type': 'number'}, 'minute': {'type': 'number'}}}, 'on': {'type': 'object', 'properties': {'day': {'type': 'number', 'description': '0=Sunday'}, 'date': {'type': 'number', 'description': '1-31'}}}, 'every': {'enum': ['minute', 'hour', 'day', 'week', 'month'], 'type': 'string', 'description': 'Frequency'}, 'month': {'type': 'number', 'description': 'Month (1-12)'}}}
next_runs
Get the next N scheduled run times for a cron expression. Uses standard Unix OR semantics for day fields.
Input schema 
{'type': 'object', 'required': ['expression'], 'properties': {'from': {'type': 'string', 'description': 'ISO 8601 start date (default: now)'}, 'count': {'type': 'number', 'description': 'Number of next runs to return (1-20, default 5)'}, 'expression': {'type': 'string', 'description': 'Cron expression'}}}
validate_cron
Check if a cron expression is valid. Returns {valid: bool, error?: string}.
Input schema 
{'type': 'object', 'required': ['expression'], 'properties': {'expression': {'type': 'string', 'description': 'Cron expression to validate'}}}
History

Recent tool changes

Added
common_crons
Sept. 17, 2026, 12:43 p.m.
Added
diff_cron
Sept. 17, 2026, 12:43 p.m.
Added
generate_cron
Sept. 17, 2026, 12:43 p.m.
Added
next_runs
Sept. 17, 2026, 12:43 p.m.
Added
validate_cron
Sept. 17, 2026, 12:43 p.m.
Added
explain_cron
Sept. 17, 2026, 12:43 p.m.
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