They were having a major outage at the same time. See their status page. But yes, a CAPTCHA for an API is pretty silly. We (reclaim.ai) have seen this before.

They were having a major outage at the same time. See their status page. But yes, a CAPTCHA for an API is pretty silly. We (reclaim.ai) have seen this before. In June 2020 it was happening every day around midnight UTC for two weeks straight. We worked around it by changing our outbound egress IP! It didn’t work today though… the problem resolved today when the outage ended.