Hi Kamijo,

See the responses to your questions below.

1) The reCAPTCHA free tier includes up to 10,000 assessments per month. If you do not have a billing account enabled and you exceed this limit, the reCAPTCHA service will begin to return 429 (TOO_MANY_REQUESTS) errors for any additional assessments.
At that point, it is up to your backend integration to decide how to handle these error responses. You can either:

• Fail open: Allow the user traffic to proceed without a reCAPTCHA verification. This will keep your site or app accessible to legitimate users but will leave the endpoint unprotected from bots until the usage resets the following month.
• Fail closed: Block the user traffic. This ensures your site remains protected, but it will also block legitimate human users from accessing the service.

2) You can view and manage your billing account directly within the Google Cloud Console. To check if you have a billing account linked to your project, please visit this page:

https://console.cloud.google.com/billing/linkedaccount

From there, you can see any associated billing accounts and confirm whether billing is enabled for the project where you are using the reCAPTCHA API.

3) For your average volume of 60,000 assessments per month, the first 10,000 are covered by the free tier. For the remaining 50,000 assessments, there are two possibilities:

• If you enable billing: You will be charged for the assessments that exceed the free tier. You can find the detailed pricing for reCAPTCHA in the official documentation here: reCAPTCHA Pricing.
• If you do not enable billing: As mentioned in the first point, any assessments beyond the 10,000 free limit will receive an error response, and it will be up to you to manage that traffic.

There is not a way to get more than 10,000 assessments for free per month. To handle your current volume without interrupting service for your users, you will need to enable billing for your project.