Webhooks
Here are the webhooks that fire for the Form 1099-K, Form 1099-NEC, and Form 1099-INT resources - each corresponding to a change status change or action taken on the form.
Form 1099-K Webhook Events
Form 1099-NEC Webhook Events
Form 1099-INT Webhook Events
Webhook events when mailing Form 1099s
Mail actions performed on Form 1099s are handled under the MAILING namespace and can be found here.
Read more on how to register and validate webhooks here.