POST form data

Send URL-encoded form data

curl -d 'user=alice&pass=secret' -X POST https://auth.example.com/login
tool
curl21 commands
tags
curl

More curl commands

  • Client certificate auth
    curl --cert client.crt --key client.key --cacert ca.crt https://secure.example.com

    mTLS request with client cert and custom CA

  • Parallel downloads with xargs
    cat urls.txt | xargs -P 5 -I{} curl -sSL -o /dev/null -w '%{url_effective} %{http_code}\n' {}

    Download 5 URLs in parallel and print status codes

  • WebSocket handshake test
    curl -i -N -H 'Upgrade: websocket' -H 'Connection: Upgrade' -H 'Sec-WebSocket-Key: x3JJHMbDL1EzLkh9GBhXDw==' -H 'Sec-WebSocket-Version: 13' http://localhost:8080/ws

    Verify WebSocket upgrade handshake responds with 101

  • Rate-limit download speed
    curl --limit-rate 1M -O https://example.com/bigfile.iso

    Limit download bandwidth to 1 MB/s

  • POST JSON payload
    curl -s -X POST https://api.example.com/v1/resource -H 'Content-Type: application/json' -H 'Authorization: Bearer <token>' -d '{"key":"value"}' | jq .

    Send a JSON POST request with Bearer auth

all 21 curl commands