Snaptcha FreeForm integration - AJAX resubmission fails even with One Time Key disabled

[shgzon]

Environment

• Craft CMS Pro 5.8.17
• Freeform 5.12.2
• Snaptcha latest version
• Tailwind 4 Freeform formatting template

Description

I’m integrating Snaptcha with Freeform. The hidden input field renders correctly ({{ craft.snaptcha.field }}), and the first AJAX form submit works fine.
But when I submit the form again via AJAX (without reloading the page), I consistently get a 400 (Bad Request) error.

POST ... 400 (Bad Request)
Uncaught (in promise) Error: Request failed with status

Expected Behavior

• With One Time Key disabled, I would expect the Snaptcha field to still be valid for multiple submissions until it expires (Expiration Time = 60 minutes).
• A second AJAX submit should succeed without requiring a reload.

Steps to Reproduce

1. Render Freeform form with {{ craft.snaptcha.field }}.
2. Submit once via AJAX → works.
3. Submit again via AJAX (same page, same form) → 400 error.

Notes

• With non-AJAX forms, multiple submissions do work as expected when One Time Key is disabled.
• This suggests the hidden input is being consumed or invalidated after the first AJAX submission.
• Should AJAX workflows fetch a fresh field via /actions/snaptcha/field/get-field after each submit? Or should the same field value remain valid when One Time Key is off?

Looking for clarification on whether this is intended behavior or if it’s a bug.

[bencroker]

The same field value should remain valid when the One Time Key is disabled. What exactly is in the response body when the second request fails?

[shgzon]

Sorry for the late response!

On the second AJAX submission, the request returns the Snaptcha HTML error page.
Since scripts in AJAX responses aren’t executed, the hidden Snaptcha input stays empty after the first submit, so the next one fails.

With One Time Key disabled, I understood the same value should remain valid within the expiration window — is that also true for AJAX flows?
Or should the frontend re-fetch a fresh field via /actions/snaptcha/field/get-field after each submit, as mentioned here:
👉 https://putyourlightson.com/plugins/snaptcha#ajax-requests

It would be great if Snaptcha could be integrated as one of the available captchas in Freeform itself — that would likely handle these AJAX cases automatically.
Is something like that possible?

Just want to confirm the intended approach before I implement a workaround.
Thanks!

[bencroker]

The same value should remain valid. My guess is that the value is being cleared after the first successful AJAX submission. Can you confirm whether the same value is sent in both the first and the second responses?