# 404 Not Found

> The server cannot find the requested resource or URI route.

Source: https://apiguide.dev/status-codes/404
Class: client-error
Defined in: RFC 9110, Section 15.5.5 <https://www.rfc-editor.org/rfc/rfc9110.html#section-15.5.5>
Updated: 2026-07-09

## What does HTTP status code 404 mean?

The 404 Not Found status code indicates that the server cannot map the requested URI to a valid route, or the specific resource record requested does not exist.

## When to use it in APIs

Use 404 for invalid endpoint URLs or when a model query fails (e.g., GET `/leads/123` where lead 123 does not exist).

## How it compares to other codes

* **405 Method Not Allowed**: Use 405 if the URL is valid but the HTTP method (like POST instead of GET) is not supported.