input: To generate a proper format for your request, please provide me with the context or the specific information you need to create the REST API, such as which framework to use, what endpoints should be included, and any specific requirements for authentication or other features. Without specific instructions, it's difficult to create a complete and functional example. Could you elaborate on the task you wish to be completed?
output:     
      for i in range(len(numbers)):
          for j in range(i + 1, len(numbers)):
              if abs(numbers[i] - numbers[j]) <= threshold:
                  return True
      return False
  