HTTP request methods - HTTP | MDN

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Safe, idempotent, and cacheable request methods

The following table lists HTTP request methods and their categorization in terms of safety, cacheability, and idempotency.

Safe, idempotent, and cacheable request methods

The following table lists HTTP request methods and their categorization in terms of safety, cacheability, and idempotency.

HTTP response status codes

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This page was last modified on Jul 4, 2025 by MDN contributors.

A typical HTTP session

Compression in HTTP

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Compression Dictionary Transport

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Browser detection using the UA string