A simple sample of running the AWS CLI which will take consideration of pagination to get all results.

aws_cli_paginator.sh

#!/bin/bash -xe

# Below command can be replaced to the required CLI, including with custom JSON output, assuming the NextToken is in the same location.
AWS_CLI_COMMAND="aws elasticbeanstalk list-platform-versions --max-records 100 --query={NextToken:NextToken,PlatformARNs:PlatformSummaryList[*].PlatformArn}"
OUTPUT_FILE="./output-$(date +%s)"

function CLI_call() {
  if [ ! -v NEXT_TOKEN ]; then
    cli_output=$($AWS_CLI_COMMAND)
  else
    cli_output=$($AWS_CLI_COMMAND --next-token $NEXT_TOKEN)
  fi

  echo $cli_output >> $OUTPUT_FILE
  echo $cli_output | jq -r ".NextToken"
}

while [ "$NEXT_TOKEN" != "null" ]; do
  NEXT_TOKEN=$(CLI_call $NEXT_TOKEN)
done

# Not 100% necessary but can be used to cleanup the output from the multiple API calls into a neater JSON formatted output.
cat $OUTPUT_FILE | jq [.PlatformARNs[]] > $OUTPUT_FILE-master.json
rm $OUTPUT_FILE

line 8: if [ -z $NEXT_TOKEN ]; then