HTTP Status Code Reference
Browse, search, and look up HTTP status codes. View detailed descriptions, categories, and whether each code is commonly used in REST APIs.
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Common in REST APIs
Frequently Asked Questions
What are the HTTP status code categories?▾
HTTP status codes are grouped into five categories: 1xx (Informational), 2xx (Success), 3xx (Redirection), 4xx (Client Error), and 5xx (Server Error). Each category indicates a different type of server response.
What is the difference between 401 and 403?▾
401 Unauthorized means the client must authenticate to get the response. 403 Forbidden means the server knows the client identity but the client does not have permission to access the resource.
What is the most common HTTP status code?▾
200 OK is the most common HTTP status code. It indicates that the request succeeded. 404 Not Found is the most commonly encountered error code.
Which HTTP status codes are used in REST APIs?▾
The most commonly used REST API status codes include 200 (OK), 201 (Created), 204 (No Content), 400 (Bad Request), 401 (Unauthorized), 403 (Forbidden), 404 (Not Found), 409 (Conflict), 422 (Unprocessable Entity), 429 (Too Many Requests), and 500 (Internal Server Error).