Milo

Milo provides a robust simulation environment for email communication systems. Key features include: • Scripted customer personas with real email addresses • Deterministic replies via SMTP, ensuring consistent test outcomes • Plus-address run IDs for distinct test iterations • JSON lookup API for test assertion in continuous integration (CI) • No-signup onboarding by simply emailing a persona address Milo allows developers to rigorously test their email-based support systems without engaging real customers. It offers six distinct personas, such as "angry refunds" or "GDPR requests," each programmed to respond predictably. This deterministic nature means that the same input from your system will always receive the same reply, making it ideal for repeatable testing and debugging. The platform operates over real SMTP, providing an authentic email interaction experience. Designed for engineering teams and developers building automated communication agents, Milo integrates seamlessly into existing CI pipelines. The JSON lookup API enables programmatic verification of conversation states, while strict mode helps identify and correct vague or unhelpful responses. With included resources like the MCP server, llms.txt, and agent skill sets, Milo helps ensure your communication systems are refined and reliable before deployment.