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Ruleset Engine

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Overview


About


Overview

Phases

Rulesets

Rules






Basic API operations


View rulesets

Add rules to phase entry point rulesets

Deploy rulesets






Work with managed rulesets


Overview

Deploy a managed ruleset

Override a managed ruleset


Override examples


Overview

Set WordPress rules to Block

Enable only Joomla rules

Enable only selected rules

Deploy a managed ruleset with ruleset, tag, and rule overrides

Adjust the sensitivity of an HTTP DDoS rule to Low

Adjust an L3/4 DDoS rule ↗





Create an exception






Work with custom rulesets


Overview

Create a custom ruleset

Add rules to a custom ruleset

Deploy a custom ruleset






Rules language


Overview


Expressions


Overview

Edit in the dashboard





Operators and grouping symbols

Values

Actions


Fields


Overview

Fields reference





Functions






Rulesets API


Overview

JSON objects

Endpoints

List and view rulesets

Create a ruleset

Update or deploy a ruleset

Add a rule to a ruleset

Update a rule in a ruleset

Delete a rule in a ruleset

Delete a ruleset






Reference


Phases list






Agent resources


Agent setup ↗

Cloudflare Skills ↗

Code Mode MCP Server ↗

Domain-specific MCP Servers ↗MCP

Ruleset Engine llms.txt ↗

Ruleset Engine llms-full.txt ↗

Cloudflare Docs llms.txt ↗

Cloudflare Docs llms-full.txt ↗













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/Ruleset Engine



Cloudflare Ruleset Engine


Last updated Apr 16, 2026|Copy as Markdown|View as Markdown|Agent setup

OverviewMain featuresAvailability




The Cloudflare Ruleset Engine allows you to create and deploy rules and rulesets in different Cloudflare products using the same basic syntax.


Main features


Powerful syntax: Rule expressions use a powerful Rules language similar to the wirefilter syntax that allows you to create complex rules.

High-performance rule evaluation: Allows you to have many rules in different Cloudflare products with almost no impact on performance.

Engine powering different Cloudflare products: Cloudflare keeps building products on top of the Ruleset Engine, which means that you can use the same API methods for configuring different products, with the same customization possibilities. Additionally, the Ruleset Engine supports the different phases of the request life cycle at Cloudflare.


Availability


The Ruleset Engine supports different Cloudflare products. Refer to Phases list and to each product's documentation for details.


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