(2 customer reviews)

$5.00Single-Site License

Adds a Google reCAPTCHA human user verification control to the Participants Database signup form.

Latest Release Available: Version 1.4.7


Adds a Google reCAPTCHA human user verification control to the CAPTCHA element in your forms, including the new “invisible” reCAPTCHA.

This is one of the most advanced human verification systems available. It is highly responsive, it detects when an automatic verification can be accomplished so the user only has to click the checkbox to pass the CAPTCHA.

The actual CAPTCHA patterns are drawn from several different sources, and the user’s responses are also used to help categorize the billions of images in the Google image index.

More information here:


This add-on requires you to obtain API keys from Google. It’s not hard, but if the process is unfamiliar it may seem like a lot of trouble to go to. You will need a Google account for this, but you don’t have to create a new one if you already have a Gmail account, just log in to your Gmail (or Google Accounts) before you begin and it will go smoothly. Otherwise, create your Google account, then once you’re logged into it, get your API keys as explained below.

Google has created a very helpful setup page for using the reCAPTCHA API, just click on the “sign up for an API key pair” link on this page:

>>>Getting Started with reCAPTCHA

Be sure to click on the sign up for an API key pair link first thing, that’s really all you need to do. The rest of the technical stuff you don’t need to worry about. Be sure to choose a V2 key with the “invisible” type. Get your key pair and enter them into the plugin settings.

Setting Up the reCAPTCHA Field

Once the keys have been entered, go to the “manage database fields” page and create a new field for the captcha (if you don’t already have one). Set the form element setting to “captcha” and enable the field for the signup form by checking the “signup” checkbox.

Enable the Google reCAPTCHA control in the field by typing the word “recaptcha” in the form element “Attributes” field.

If the user does not click the reCAPTCHA checkbox, the message shown is set in the Participants Database “Failed CAPTCHA Message” setting, under the general tab.


Site Key, Secret Key

These keys, which are supplied by Google, must be provided for the plugin to work. See the instructions for how to obtain these codes for your site.

CAPTCHA Passed Message

This is what to show if the challenge has been met to let the user know they passed it. It can be a simple string or some HTML if you like.

Widget Theme, Widget Type

Selects the appearance of the widget.

Invisible reCAPTCHA Badge Location

When using Invisible reCAPTCHA, a badge is placed on the screen. This setting sets where that is shown. Use the “Inline” setting if you want to style it yourself with CSS.

Revalidation Type

If the user requires additional validation, this selects which type of revalidation widget will be used. It’s usually best to stick with “image” because most people are familiar with it.

2 reviews for reCAPTCHA

  1. Orion

    Yes, you rock hard!

  2. Celia M

    A lovely product, thanks for making it work in Participants Database! I accidentally deleted my ReCaptcha for a time and got a bunch of spam sign-ups. Came here, easy directions to reset it up–all better!

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