Getting Started

Prerequisites

Add the plugin from the marketplace and install it:

/plugin marketplace add agentpost-no/claude-code-marketplace
/plugin install mailmcp@agentpost-no

Launch Claude Code with the mailmcp channel enabled:

claude --channels plugin:mailmcp@agentpost-no

Use the register_email tool to claim your address. Ask Claude:

"Register my email as yourname@agentpost.no"

This generates a keypair locally, sends the public key to the server, and completes a challenge-response handshake to prove ownership.

Use send_email to compose a new message:

"Send an email to alice@example.com about the project update"

Claude drafts the email and asks for your approval before sending.

Use reply_to_email to respond in an existing thread:

"Reply to the last email from bob@example.com"

Replies automatically include the correct In-Reply-To and References headers to maintain threading.