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Pint is an open-source linter and validator for Prometheus alerting and recording rules, developed and maintained by Cloudflare. It helps teams catch configuration errors, style issues, and best-practice violations before rules are deployed to production.
Key facts
Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.
| Field | Value |
|---|---|
| Repository | cloudflare/pint |
| Owner | cloudflare |
| Primary language | Go |
| License | Apache-2.0 — OSI-approved |
| Stars | 1k |
| Forks | 68 |
| Open issues | 6 |
| Latest release | v0.86.0 (2026-06-12) |
| Last updated | 2026-07-07 |
| Source | https://github.com/cloudflare/pint |
What pint is
A Go-based command-line tool that parses Prometheus YAML rule files and applies configurable checks for syntax, naming conventions, label consistency, and rule logic. Pint integrates into CI/CD pipelines and supports custom rule validation through its configuration system.
Get the pint source
Clone the repository and explore it locally.
git clone https://github.com/cloudflare/pint.gitcd pint# follow the project's README for install & configurationNeed it deployed, integrated, or customized instead? DEV.co ships production installs.
Best use cases
Implementation considerations
- Requires integration into CI/CD pipeline (GitHub Actions, GitLab CI, Jenkins, etc.) to be effective; standalone use is limited.
- Configuration is rule-based and customizable but requires upfront effort to align with team standards and organizational policies.
- Rule files must be in standard Prometheus YAML format; non-standard or dynamically generated rules may require preprocessing.
- Linting rules cover syntax, naming, labels, and common anti-patterns, but custom checks may need custom tooling or post-processing.
- Performance scales well for typical org rule sets; benchmark your own rule volume to confirm acceptable CI runtime.
When to avoid it — and what to weigh
- No Prometheus rules to validate — If you are not using Prometheus or do not manage custom rule files, this tool provides no value.
- Require proprietary or managed rule validation — Pint is open-source; if your compliance or licensing model mandates vendor support contracts, evaluate commercial alternatives.
- Simple single-rule deployments — Overhead of CI/CD integration and configuration management may outweigh benefits for teams with minimal or infrequent rule changes.
- Need real-time alert simulation — Pint validates syntax and structure; it does not simulate alert firing or test queries against live metric data.
License & commercial use
Licensed under Apache License 2.0 (Apache-2.0), a permissive open-source license.
Apache 2.0 is a permissive OSI license that permits commercial use, modification, and distribution, subject to license preservation and liability disclaimer. No commercial restrictions or warranties are implied. Commercial use is permitted, but review the license terms for your compliance obligations.
DEV.co evaluation signals
Editorial assessment — not user reviews. Directional, with an explicit confidence level.
| Signal | Assessment |
|---|---|
| Maintenance | Active |
| Documentation | Adequate |
| License clarity | Clear |
| Deployment complexity | Low |
| DEV.co fit | Good |
| Assessment confidence | High |
Pint operates on static configuration files and does not expose network services or authenticate users. Security review should focus on: (1) CI/CD permissions and secret handling when integrating into pipelines, (2) validation logic rigor (whether all rule syntax is safely parsed), and (3) any external dependencies introduced at build or runtime. Standard Go supply chain practices apply.
Alternatives to consider
Prometheus built-in rule validation
Prometheus server can validate rule syntax at startup; however, it lacks pre-deployment linting, style enforcement, and CI/CD integration.
Grafana Loki rules linter (logfmt/line-protocol parsers)
If using Loki for logs rather than Prometheus metrics, Loki offers log rule validation; not suitable for Prometheus alerting rules.
Custom bash/Python validation scripts
Teams can write custom validators; however, this duplicates effort and misses pint's curated best-practice checks and maintainability.
Build on pint with DEV.co software developers
Integrate pint into your CI/CD pipeline today to catch rule errors early, enforce team standards, and reduce alert misconfigurations. Start with our DevOps or API integration services to design a robust observability workflow.
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pint FAQ
Can pint simulate or test alert firing?
How do I customize linting rules?
Does pint require Prometheus to be running?
Can I use pint for Alertmanager rules?
Custom software development services
Need help beyond evaluating pint? DEV.co is a software development agency building custom software, web applications, APIs, and open-source observability integrations — and maintaining them long-term.
Ready to improve your Prometheus rule quality?
Integrate pint into your CI/CD pipeline today to catch rule errors early, enforce team standards, and reduce alert misconfigurations. Start with our DevOps or API integration services to design a robust observability workflow.