Download all of your Team's custom Slack emojis.

download-slack-emoji.sh

#!/bin/bash -eo pipefail
# Log in to Slack in a web browser and open the network tools to inspect the traffic.
# Filter the requests with "/api/" and pick one to inspect. Click on the Headers tab and scroll down to see the request details.
# You need the xoxc token from the request body, and a copy of the cookies. It is the "d" cookie that is important, but you can copy all of them.
# Paste the values below.
# You need to have curl and jq installed.

SLACK_TOKEN="xoxc-...."
COOKIES="d=...."

data=$(curl -q -sS -b "$COOKIES" "https://slack.com/api/emoji.list?token=$SLACK_TOKEN")

if echo "$data" | jq -e '.error?' > /dev/null; then
  echo "$data"
  exit 1
fi

echo "$data" > data.json

echo "$data" | jq -Mr '.emoji | to_entries | .[] | select(.value | startswith("http")) | "\(.key) \(.value)"' | sort | while read name url; do
  fn="$name.${url##*.}"
  [[ -f "$fn" ]] && continue
  echo "$fn"
  curl -q -sS -o "$fn" "$url"
done