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Create a custom ruleset

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Create a custom ruleset

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

OverviewExample A - Custom ruleset at the account levelExample B - Custom ruleset at the zone level

Use the Create an account or zone ruleset operation to create a custom ruleset, making sure that you:

Set the kind field to custom.

Specify the name of the phase where you want to create the custom ruleset in the phase field.

You can also specify the list of rules to include in the custom ruleset in the rules array. To add rules after creating the custom ruleset, refer to Add rules to a custom ruleset.

If you are using Terraform, refer to WAF custom rules configuration using Terraform for examples of creating and deploying custom rulesets.

If you are using the Cloudflare dashboard, refer to Work with custom rulesets in the dashboard.

Note

Currently, zone-level custom rulesets are only available in the http_request_firewall_custom phase.

Example A - Custom ruleset at the account level

The following request creates a new custom ruleset at the account level. The response will include the ID of the new custom ruleset in the id field.

Required API token permissions
At least one of the following token permissions is required:
Mass URL Redirects Write

Magic Firewall Write

L4 DDoS Managed Ruleset Write

Transform Rules Write

Select Configuration Write

Account WAF Write

Account Rulesets Write

Logs Write
Create an account rulesetbashcurl "https://api.cloudflare.com/client/v4/accounts/$ACCOUNT_ID/rulesets" \ --request POST \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --json '{ "name": "Custom Ruleset 1", "description": "My First Custom Ruleset (account)", "kind": "custom", "phase": "http_request_firewall_custom" }'{ "result": { "id": "f82ccda3d21f4a02825d3fe45b5e1c10", "name": "Custom Ruleset 1", "description": "My First Custom Ruleset (account)", "kind": "custom", "version": "1", "last_updated": "2025-08-09T10:27:30.636197Z", "phase": "http_request_firewall_custom" }, "success": true, "errors": [], "messages": []}
You can include a list of rules in the custom ruleset creation request. If you have not added any rules, refer to Add rules to a custom ruleset for more information.

Example B - Custom ruleset at the zone level

The following request creates a new custom ruleset at the zone level. The response will include the ID of the new custom ruleset in the id field.

Required API token permissions
At least one of the following token permissions is required:
Response Compression Write

Config Settings Write

Dynamic URL Redirects Write

Cache Settings Write

Custom Errors Write

Origin Write

Managed headers Write

Zone Transform Rules Write

Mass URL Redirects Write

Magic Firewall Write

L4 DDoS Managed Ruleset Write

HTTP DDoS Managed Ruleset Write

Sanitize Write

Transform Rules Write

Select Configuration Write

Bot Management Write

Zone WAF Write

Account WAF Write

Account Rulesets Write

Logs Write

Logs Write
Create a zone rulesetbashcurl "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/rulesets" \ --request POST \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --json '{ "name": "Custom Ruleset 1", "description": "My First Custom Ruleset (zone)", "kind": "custom", "phase": "http_request_firewall_custom" }'{ "result": { "id": "f82ccda3d21f4a02825d3fe45b5e1c10", "name": "Custom Ruleset 1", "description": "My First Custom Ruleset (zone)", "kind": "custom", "version": "1", "last_updated": "2025-08-09T10:27:30.636197Z", "phase": "http_request_firewall_custom" }, "success": true, "errors": [], "messages": []}
You can include a list of rules in the custom ruleset creation request. If you have not added any rules, refer to Add rules to a custom ruleset for more information.

Note

Currently, zone-level custom rulesets are only available in the http_request_firewall_custom phase.

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Overview

Example A - Custom ruleset at the account level

Example B - Custom ruleset at the zone level

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