Error Code Portal
CloudflareCloudflare HTTP errorsError code

1020

Error 1020: Access denied

Alternative forms: Error 1020

What does this code mean?

Code 1020 · An issue reported by Cloudflare HTTP errors.

Official explanation · Original text

This error indicates that a Cloudflare security feature configured by the website owner blocked the request. Cloudflare returns it with an HTTP 403 status code. A security rule with a _Block_ action matched the request, and the rule has no custom response configured. For example, API Shield schema validation and JWT validation can block requests with a 1020 error.

Troubleshooting and diagnostic links

First check that the document's product, version, and environment match your situation.

Source and terms of use

Error 1020: Access denied ↗

Creator: Cloudflare, Inc. and contributors
License: Creative Commons Attribution 4.0 International
Checked on: 2026-11-12

Modifications: Selected introductory official description; Markdown stripped; original Korean product context added. Direct official error page retains the complete cause and resolution instructions.

Source details · Original licenses and notices