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Introduction

The reCAPTCHA system has been specifically designed to establish that a computer user is human, in order to protect websites from bots. It cannot be tricked by any script. The only solution in this case is to add a special condition in the code from your Web Application that will disable the reCAPTCHA system when the traffic comes from Endtest. However, if you are dealing with a basic CAPTCHA system that requires you to type the letters from an image, you can try to perform Optical Character Recognition (OCR) on that image and extract the text with the Extract Value from Element with OCR option from the Set Variable action.
endtest captcha 2

Details

There are 2 ways to detect if the traffic is coming from Endtest:

1. Secure Gateway IPs

All the traffic that comes from Endtest comes through our list of Secure Gateway IPs:
Secure Gateway IP Addresses
34.211.40.72
35.166.159.89
207.254.40.71
207.254.60.102
52.89.18.176
52.26.12.35
54.187.169.42
52.43.87.222
34.214.85.4
54.184.162.15
44.237.178.201
44.238.105.245
44.228.22.115
35.81.185.74
207.254.52.64
44.241.213.227
52.26.206.66
52.13.40.64
44.238.190.158
207.254.60.6
207.254.41.137
207.254.60.76
34.213.62.124
54.191.53.140
18.237.140.182
52.11.28.247
44.240.94.219
If you want to use Real IP Geolocation in your tests, you’ll have to add these entries to the whitelist as well:
GeolocationIP Address
San Francisco, US52.53.118.130
Seattle, US20.64.225.137
Montreal, Canada3.97.155.50
London, UK3.9.107.187
Frankfurt, Germany52.28.171.236
Eemshaven, Netherlands34.90.84.125
Dubai, UAE3.28.26.211
Tel Aviv, Israel51.16.199.215
Tokyo, Japan18.179.93.49
Seoul, South Korea13.209.174.252
Singapore54.151.171.44
Sydney, Australia54.206.130.168

2. User Agent Strings

All the user agent strings from our cross-browser cloud contain the string endtest at the end.