How to curl in parallel from a list of links

Question

list.txt contains links. I need them to be curled in parallel at the same time. Meaning curling example.com, abc.com and 123.com at the same time.

What I've tried

mycurl() {
curl $1
}
seq 1 | parallel -j0 mycurl list.txt >> output.txt
#I've also tried
seq 1 | parallel -j0 mycurl ::: list.txt >> output.txt
#I"ve also tried
parallel -a list.txt mycurl >> output.txt

They all output parallel --help

list.txt contents

example.com
abc.com
def.com

Answer 1

I fail to see the point of your mycurl() function, but you can use it like this if you want to:

# Declare 'mycurl()' function
mycurl() {
   # list.txt can be accessed in here if you want
   curl $1
}

# Make 'mycurl()' function available to processes started by 'parallel'
export -f mycurl

# Call 'mycurl()' once with each line of 'list.txt' as parameter
parallel -a list.txt mycurl {} > output.txt