Both

HTTP Connection Header

Controls whether the network connection stays open after the current transaction. HTTP/2 and HTTP/3 prohibit using this header for connection management.

Purpose

Manages network connection behavior, primarily whether to keep the connection alive for subsequent requests.

Connection: keep-alive Connection: close Connection: upgrade

Code Examples

See how to use the Connection header in different tools and languages.

curl -H "Connection: keep-alive" https://api.example.com/data
curl -H "Connection: close" https://api.example.com/data

Related Headers

Transfer-Encoding

Specifies the transfer encoding applied to the message body. Chunked encoding is used when the response size is not known in advance.

Test Your APIs

API Response Time Checker

Test your APIs and inspect response headers in real-time

HTTP Headers Reference

Complete reference of all HTTP request and response headers

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