post https://api.apollo.io/api/v1/emailer_campaigns/remove_or_stop_contact_ids
Use the Update Contact Status in a Sequence endpoint to either mark contacts as having finished a sequence, or to remove them from a sequence entirely.
This endpoint requires a master API key. If you attempt to call the endpoint without a master key, you will receive a 403 response. Refer to Create API Keys to learn how to create a master API key.