JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
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Since you use a Stripe Integrated payment form, you will need to use Stripe Test API Keys from your Stripe account.
It appears that you have already filled the API key fields at JotForm, but there is an extra space symbol in 'Stripe Secret API key' field. Please remove the space symbol and then test the form again.
Test Credit Card:
- Credit Card Number: 4242424242424242
- CVC : 123
- Valid Expiration Date (later than the current date)
More information about Stripe testing is available in Stripe Testing Guide.
If you need any further assistance, please let us know.