API Gateway Resource Policy to block Web Crawlers

api_gateway_block_crawlers.json

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Principal": "*",
            "Action": "execute-api:Invoke",
            "Resource": "arn:aws:execute-api:{REGION}:{ACCOUNT_ID}:{API_NAME}/*"
        },
        {
            "Effect": "Deny",
            "Principal": "*",
            "Action": "execute-api:Invoke",
            "Resource": "arn:aws:execute-api:{REGION}:{ACCOUNT_ID}:{API_NAME}/*",
            "Condition": {
                "StringEquals": {
                    "aws:UserAgent": [
                        "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)",
                        "Google (+https://developers.google.com/+/web/snippet/)",
                        "Mozilla/5.0 (compatible; Bingbot/2.0; +http://www.bing.com/bingbot.htm)",
                        "Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/help/us/ysearch/slurp)",
                        "DuckDuckBot/1.0; (+http://duckduckgo.com/duckduckbot.html)",
                        "Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)",
                        "Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)",
                        "Sogou web spider/4.0(+http://www.sogou.com/docs/help/webmasters.htm#07)",
                        "Mozilla/5.0 (compatible; Exabot/3.0; +http://www.exabot.com/go/robot)",
                        "facebookexternalhit/1.0 (+http://www.facebook.com/externalhit_uatext.php)",
                        "ia_archiver (+http://www.alexa.com/site/help/webmasters; crawler@alexa.com)"
                    ]
                }
            }
        }
    ]
}