aws-cron-expression-validator
ValidatesAWS EventBridge cron expressions, which are similar to, but not compatible with Unix style cron expressions
Decision gist · record as of 2026-08-14
Yes. If you work with AWS EventBridge schedules, this lightweight validator saves debugging time by catching expression errors before deployment. No dependencies, permissive license, active maintenance, and a clear API make it a low-risk addition to projects that need cron validation.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.10 or later.
- Low friction: pure Python, no runtime dependencies, distributed as a wheel.
- Actively maintained with recent releases; last commit 2026-04-14.
License · maintenance · safety
permissive license (permissive) — MIT license (permissive); you can use, modify, and distribute this package freely in commercial and private projects.
last release 2025-11-26 (261 days) · last repo commit 2026-04-14 · 26 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 81,115 downloads/mo, #14,247 on PyPI
Alternatives
Verify before relying
pip install aws-cron-expression-validator
from aws_cron_expression_validator.validator import AWSCronExpressionValidator
AWSCronExpressionValidator.validate("0 180 ? * MON-FRI *")- Whether the validator catches all edge cases in AWS's wildcard semantics (L, W, # operators for day-of-month and day-of-week fields).
- Performance characteristics when validating large batches of expressions.
What it is and what it does
This package validates cron expressions in the format used by AWS EventBridge, which differs from standard Unix cron in field count (six instead of five), range constraints, and wildcard support. EventBridge cron expressions use minute, hour, day-of-month, month, day-of-week, and year fields, with wildcards including *, /, -, and , plus special operators like L, W, and # for day-of-month and day-of-week fields.
The validator raises specific exceptions (e.g., AWSCronExpressionMinuteError) for invalid fields and generic ValueError for malformed expressions. It has no runtime dependencies and requires Python 3.10 or later. The package is small, actively maintained, and suitable for applications that need to validate EventBridge schedules before submission or for testing scheduling logic.
Use it for
- Validate cron expressions before deploying EventBridge rules to catch syntax errors early.
- Build a CLI tool or web form that accepts cron schedules and rejects invalid AWS expressions.
- Test event scheduling logic in unit tests by validating expressions your application generates.
- Migrate Unix cron jobs to AWS EventBridge with confidence that expressions conform to AWS syntax.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
If you work with AWS EventBridge schedules, this lightweight validator saves debugging time by catching expression errors before deployment. No dependencies, permissive license, active maintenance, and a clear API make it a low-risk addition to projects that need cron validation.
Install
aws-cron-expression-validator on PyPI
Before you install
Low friction: pure Python, no runtime dependencies, distributed as a wheel. Actively maintained with recent releases; last commit 2026-04-14.
Requires Python 3.10 or later.
License in practice
MIT license (permissive); you can use, modify, and distribute this package freely in commercial and private projects.
Quickstart
pip install aws-cron-expression-validator
from aws_cron_expression_validator.validator import AWSCronExpressionValidator
AWSCronExpressionValidator.validate("0 180 ? * MON-FRI *")Verify before relying
- Whether the validator catches all edge cases in AWS's wildcard semantics (L, W, # operators for day-of-month and day-of-week fields).
- Performance characteristics when validating large batches of expressions.
Package facts
| License | permissive license permissive |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | None |
| Maintenance | Actively maintained 261 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 81,115 / month, #14,247 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableLicense :: OSI Approved :: MIT LicenseOperating System :: OS IndependentProgramming Language :: Python :: 3 |
Evidence: aws_cron_expression_validator-1.1.15-py3-none-any.whl
Tags
Let your AI agent find packages like this
Example. Real query, live index.
You found this page by searching. An agent finds it by wishing: SkillFed indexes 14,416 PyPI packages by what they can do, searchable in plain language.
wish › “aws eventbridge cron validation”
- aws-cron-expression-validatorValidates AWS EventBridge cron expressions, which use a six-field…
- aws-croniterParses, validates, and calculates occurrences of AWS EventBridge cron…
- pyawscronParses and iterates over AWS CloudWatch cron expressions to find…
Give your agent the search over MCP, or paste the wish link into any chat.
More Utilities packages
Converts domain names between Unicode and ASCII-compatible encoding (Punycode) according to IDNA 2008 and Unicode Technical Standard 46, with security validation and broader script coverage than the standard library.
Install it if you work with internationalized domain names, need to validate domains, or use HTTP clients that depend on it transitively.
Detects and normalizes text encoding from unknown or ambiguous sources, supporting all IANA character sets that Python's core library provides codecs for, with the ability to register custom codecs.
Setuptools is a Python build backend and package management tool that handles building, distributing, and installing Python packages, including support for C/C++ extension modules.
Pluggy provides a plugin system that lets you define hook specifications and register implementations to be called in sequence, enabling extensible Python applications without tight coupling.
Install it if you're building an extensible application or framework.
Pygments is a syntax highlighter that colorizes source code and text in over 500 languages and formats, outputting to HTML, LaTeX, RTF, SVG, images, or ANSI terminal sequences.
Install it if you need to display or transform source code.
Six provides utility functions to write Python code that runs on both Python 2.7 and Python 3.3+, smoothing over language differences between the two versions.
See also quartz-cron-checker · aws-croniter · pyawscron · cron-validator · cronex · cronsim · tzcron · cron-descriptor · cron-schedule-triggers · aws-cdk.aws-events