Send a request with curl

curl is an HTTP client you can run in a terminal.

Request a page and show response headers:

curl -i https://example.com/

Send JSON with POST:

curl https://example.com/notes \
  -X POST \
  -H 'Content-Type: application/json' \
  -d '{"title":"Learn HTTP"}'

-X chooses the method, -H adds a header, and -d supplies a body. When you use -d, curl chooses POST by default, so -X POST is optional here.

Add -v for connection and request details. It is noisy, but useful when a redirect, TLS handshake, or request header is not behaving as expected.

Quick check

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