Using an undocumented (and thus subject-to-change) API, provides a list of all AWS services colourised as to whether or not they're available in the given region. Alternatively, given two regions, colourised based on whether services are available in one region, both regions, or neither of them.

aws-services.py

#!/usr/bin/env python

import json, sys
from urllib.request import urlopen


def green(str):  return f'\033[92m{str}\033[0m'
def orange(str): return f'\033[38;5;214m{str}\033[0m'
def red(str):    return f'\033[91m{str}\033[0m'
def yellow(str): return f'\033[93m{str}\033[0m'


def main():

  # Get command line argument if it exists, otherwise print an example of providing it.
  if len(sys.argv) < 2 or len(sys.argv) > 3 or sys.argv[1] == '-h' or sys.argv[1] == '--help':
    print(f'This script lists all AWS services, with those available in a given region in '
          f'{green("green")} and\nthose not available in {red("red")}.\n\n'
          + yellow(f'$ {sys.argv[0]} eu-west-1\n'))
    print(f'When a second region is provided, services available in both regions are in '
          f'{green("green")}, those\nin one region in {orange("orange")}, and those in neither '
          f'region in {red("red")}.\n\n'
          + yellow(f'$ {sys.argv[0]} us-east-1 eu-west-1'))

    if len(sys.argv) < 2 or len(sys.argv) > 3:
      raise Exception

    return

  region1 = sys.argv[1]
  region2 = sys.argv[2] if len(sys.argv) == 3 else None

  # Get the AWS services JSON file.
  # NOTE: This is an undocumented API that is subject to change.
  url = 'https://api.regional-table.region-services.aws.a2z.com/index.json'
  response = json.load(urlopen(url))
  metadata = response['metadata']
  service_data = response['prices']

  all_services = []
  region1_services = []
  region2_services = []

  # Loop through the services and add them to the correct list.
  for service_instance in service_data:
    service_name = service_instance['attributes']['aws:serviceName']
    service_region = service_instance['attributes']['aws:region']

    service_name = service_name.replace('AWS ', '').replace('Amazon ', '')

    if service_name not in all_services:
      all_services.append(service_name)

    if service_region == region1 and service_name not in region1_services:
      region1_services.append(service_name)

    if region2 is not None:
      if service_region == region2 and service_name not in region2_services:
        region2_services.append(service_name)

  if len(region1_services) == 0:
    print(f'No services found in region {yellow(region1)}. Is the region name correct?')
    raise Exception

  if region2 is not None and len(region2_services) == 0:
    print(f'No services found in region {yellow(region2)}. Is the region name correct?')
    raise Exception

  # Sort services alphabetically.
  all_services.sort()

  # Single region mode.
  if region2 is None:
    print(f'Services available in {yellow(region1)} are shown in {green("green")}:\n')
    for service_name in all_services:
      if service_name in region1_services:
        print(green(service_name))
      else:
        print(red(service_name))

    print(f'\n{len(region1_services)} (out of {len(all_services)}) services available in '
          f'{yellow(region1)}.')
    print(f'Last updated {metadata["source:version"]}.')

    return

  # Multi region mode.
  print(f'Comparing services in {yellow(region1)} with {yellow(region2)}:')
  print(f'- Services available in both regions are in {green("green")}.')
  print(f'- Services available in only one region are in {orange("orange")}.')
  print(f'- Services not available in either region are in {red("red")}.\n')

  for service_name in all_services:
    if service_name in region1_services and service_name in region2_services:
      print(green(service_name))
    elif service_name in region1_services or service_name in region2_services:
      print(orange(service_name), end=' ')
      print(f'({region1} only)' if service_name in region1_services else
            f'({region2} only)')
    else:
      print(red(service_name))

  print()
  print(f'{len(region1_services)} (out of {len(all_services)}) services available in '
        f'{yellow(region1)}.')
  print(f'{len(region2_services)} (out of {len(all_services)}) services available in '
        f'{yellow(region2)}.')
  print(f'Last updated {metadata["source:version"]}.')


try:
  main()
except Exception:
  exit(1)

exit(0)