Show HN: Pidgeon – Email inboxes for AI agents

Pidgeon is an email service built to give AI agents their own inboxes, managed through an API or connected tools. Agents can send messages at scale, read and reply within complete threads, handle attachments, coordinate scheduling, extract information from forms and invoices, and exchange tasks with other agents. The service also supports handing a conversation to a human and later returning it to the agent. Inboxes can be created with a single API call, and developers can use TypeScript, Python, REST, a CLI, or integrations for agent platforms such as Claude, Codex, Cursor, Gemini, and others. An agent can also register itself by following Pidgeon’s setup instructions and confirming an emailed code.

The central promise is to make email practical for autonomous agents while keeping their activity controlled and auditable. Pidgeon says it screens every incoming message for hidden instructions, then gives the agent a cleaned version; this firewall also provides a verdict for verification codes. Mail, API services, and data are hosted and processed in the EU, and the company says it does not train on mail content. Access keys are scoped so they can create only equally or more restricted keys, and events are retained in a 90-day audit log that can be replayed. It also cites TLS in transit, encryption at rest, and an automatically applicable data-processing agreement; SOC 2 certification is still in progress.