AgentMail introduces AgentID for AI-agent sign-ins

AgentMail introduced AgentID as a way for AI agents to sign in to apps. The launch post claims millions of agents already use AgentMail and offered three free months of any plan to people who integrated the system and replied with a screenshot. A commenter described the product as giving each agent a verified inbox linked to a human owner, but the posts provide no independent technical or adoption data.