get-nordvpn-credentials.sh

#!/bin/sh
RAND=$(uuidgen)
CHALLENGE=$(echo -en "$RAND" | sha256sum | cut -d' ' -f1)
INIT_DATA=$(curl -X POST 'https://api.nordvpn.com/v1/users/oauth/login'\
     -H 'Content-Type: application/json'\
     -d '{"preferred_flow": "login", "challenge": "'$CHALLENGE'"}' \
  )

REDIRECT_URI=$(echo "$INIT_DATA" | jq -r .redirect_uri)
ATTEMPT=$(echo "$INIT_DATA" | jq -r .attempt)
echo "Open the following URL in your browser: $REDIRECT_URI"

echo -en "After logging in, copy the "exchange_token" from the URL and paste it here: "
read EXCH_TOKEN


OAUTH_RESULT=$(curl "https://api.nordvpn.com/v1/users/oauth/token?attempt=$ATTEMPT&exchange_token=$EXCH_TOKEN&verifier=$RAND" \
  -H 'accept: application/json' \
  -H 'content-type: application/json' \
  --compressed)

OAUTH_TOKEN=$(echo "$OAUTH_RESULT" | jq -r .token)
B64_TOKEN=$(echo "token:$OAUTH_TOKEN" | base64 | tr -d \\n)

CREDENTIALS=$(curl 'https://api.nordvpn.com/v1/users/services/credentials' \
  -H 'accept: application/json' \
  -H 'authorization: Basic '"$B64_TOKEN"
)

echo "$CREDENTIALS" | jq .