Register your website and get Secret Key Very first thing you need to do is register your website on Google reCAPTCHA to do that click here. Login to your Google account and create the app by filling the form. Select the reCAPTCHA v3 and in that select the “I am not a robot” checkbox option. I was trying to fix forms of a website that belongs to my student company to avoid spam, and with that I was trying to get the recaptcha v2 key right. But all I got was “ERROR for site owner: Invalid site key”, I even tried to generate new keys and none of it worked. In order to integrate the Google reCAPTCHA to the website, one has to register the website with Google and then generate the required Site Key i.e. Public Key and Secret Key i.e. Private Key for the reCAPTCHA. This article is valid for reCAPTCHA version 2 and reCAPTCHA version 3. Visit the Google reCAPTCHA Website. This site is NOT affiliated with reCaptcha. There are a lot of anti-bot services out there and reCaptcha is one of the biggest and most ubiquitous. I use them for all my websites that need anti-bot protection. They're powerful, handicap accessible and help digitize textual documents.
reCAPTCHA protects you against spam and other types of automated abuse. With Contact Form 7’s reCAPTCHA integration module, you can block abusive form submissions by spam bots.
The latest version of the reCAPTCHA API is v3. Contact Form 7 5.1 and later uses this reCAPTCHA v3 API. reCAPTCHA v3 works in the background so users don’t need to read blurred text in an image or even tick the “I’m not a robot” checkbox.
Note: API keys for reCAPTCHA v3 are different from those for v2; keys for v2 don’t work with the v3 API. You need to register your sites again to get new keys for v3.
If you are using an older version of Contact Form 7 and are looking for information about the reCAPTCHA module for the v2 API, refer to reCAPTCHA (v2).
Registering a site
To start using reCAPTCHA, you first need to register the WordPress site. reCAPTCHA is Google’s service so you need a Google account to use it. Sign in to Google with the account, and go to the My reCAPTCHA page. You will see a simple registration form like the following:
Choose reCAPTCHA v3 from type options, and enter the domain of the website in the Domains field.
After you register a website, you will get the site key and secret key for the site.
Next, move to the WordPress admin screen and open the Contact > Integration menu page.
You will see a box titled reCAPTCHA there. Click Setup Integration in the box. It will display input fields Site Key and Secret Key. Copy-paste the two keys you received in the previous step into the fields, and click Save Changes.
That’s it. Now your contact forms use reCAPTCHA’s score to verify whether the form submission is from a human or from a spam bot.
Recaptcha Key Generator
reCAPTCHA v3 doesn’t need a CAPTCHA widget (the “I’m not a robot” checkbox used in reCAPTCHA v2) to work, so
[recaptcha] form-tags are no longer necessary. If
[recaptcha] form-tags are found in a form template, Contact Form 7 5.1 or higher ignores them and replaces them with an empty string.
Service Anti Captcha provides a platform for solving various captcha types by one users to other users. We have customers who pay workers a small reward for each solved captcha. Workers usually reside in developing countries such as Vietnam, Venezuela, Indonesia, Ukraine and others.
Get A Recaptcha Key
To use our service customers utilise special apps which connect to application program interface or API of our service. Such app sends captcha data to our API, which is then assigned to an idle worker. Worker solves captcha, submits result and it is then transmitted back to customer app.
Each task costs a fraction of a United States dollar and you pay for each task. A thousand image captcha solutions cost seventy cents. A thousand google recaptcha solutions cost about two dollars.
To start using our service you need to register, topup your balance and copy special thirty two bytes long access key to the application you use. If you want to use our service in Chrome browser, you can install plugin made by our team. Unfortunately Google has banned our plugin in their Plugins Store and you have to install it manually via extensions page in settings. Instructions for plugin installation are located on another website - antcpt.com. We recommend visually impaired users to start with plugin installation and come back in case of success for account registering. Here are the links you will need.