GitHub Repository Lists Email Domains Used by AI Agents and Test Automation

Summary

The GitHub repository `agent-email-domains` is an open list of email domains associated with AI agents and test automation. Its `domains.json` file records each domain with a provider, category, and evidence, while separate lists provide all domains, agent-inbox domains, and test-inbox domains. A jsDelivr URL exposes the combined list for applications that need a directly consumable source. The project says that entries cover subdomains, so an address such as `x@abc.mailosaur.net` matches the `mailosaur.net` entry. Instead of automatically blocking these signups, the repository recommends allowing agent signups, marking the account as an agent, and offering an API or agent plan; test signups can be allowed in staging and QA. Detection is incomplete because agents using custom domains or Gmail are not covered. Contributors can add or correct domains through an issue or pull request, but each entry must have public evidence described in `CONTRIBUTING.md`. The project is maintained by Revdoku and released under the MIT license.