AugmentClaude
OutreachEmail

AgentMail

By raphaelmansuy· raphaelmansuy/edgecrab· 0

Give your agent its own email inbox to send, receive, and manage messages autonomously.

Installation

  1. Make sure Claude is on your device and in your terminal.

    Skills load from ~/.claude/skills/ when Claude Code starts up — so you need it on your machine first. If you don't have it yet, install it once with the command below, then run claude in any terminal to verify.

    One-time setup
    npm i -g @anthropic-ai/claude-code

    Already have it? Skip ahead.

  2. Paste into Claude Code or into your terminal.
    Install
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    This copies the whole skill folder into ~/.claude/skills/agentmail-raphaelmansuy/ — the SKILL.md plus any scripts, reference docs, or templates the skill ships with. Safe default: works for every skill.

    Faster alternative (instruction-only skills)

    Skips the clone and grabs only the SKILL.md file. Don't use this if the skill ships Python scripts, reference markdowns, or asset templates — they won't be downloaded and the skill will fail when it tries to load them.

    Quick install (SKILL.md only)
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  3. Restart Claude Code.

    Quit and reopen Claude Code (or any other agent that loads from ~/.claude/skills/). New skills are picked up on startup.

  4. Just ask Claude.

    Skills auto-activate when your request matches the skill's description — no slash command needed. Trigger phrases live in the skill's own frontmatter; you can read them in the “What this skill does” section above.

Prefer to read the source first? Open on GitHub.

When Claude uses it

Give the agent its own dedicated email inbox via AgentMail. Send, receive, and manage email autonomously using agent-owned email addresses (e.g. hermes-agent@agentmail.to).

What this skill does

AgentMail — Agent-Owned Email Inboxes

Requirements

  • AgentMail API key (required) — sign up at https://console.agentmail.to (free tier: 3 inboxes, 3,000 emails/month; paid plans from $20/mo)
  • Node.js 18+ (for the MCP server)

When to Use

Use this skill when you need to:

  • Give the agent its own dedicated email address
  • Send emails autonomously on behalf of the agent
  • Receive and read incoming emails
  • Manage email threads and conversations
  • Sign up for services or authenticate via email
  • Communicate with other agents or humans via email

This is NOT for reading the user's personal email (use himalaya or Gmail for that). AgentMail gives the agent its own identity and inbox.

Setup

1. Get an API Key

2. Configure MCP Server

Add to ~/.edgecrab/config.yaml (paste your actual key — MCP env vars are not expanded from .env):

mcp_servers:
  agentmail:
    command: "npx"
    args: ["-y", "agentmail-mcp"]
    env:
      AGENTMAIL_API_KEY: "am_your_key_here"

3. Restart Hermes

hermes

All 11 AgentMail tools are now available automatically.

Available Tools (via MCP)

ToolDescription
list_inboxesList all agent inboxes
get_inboxGet details of a specific inbox
create_inboxCreate a new inbox (gets a real email address)
delete_inboxDelete an inbox
list_threadsList email threads in an inbox
get_threadGet a specific email thread
send_messageSend a new email
reply_to_messageReply to an existing email
forward_messageForward an email
update_messageUpdate message labels/status
get_attachmentDownload an email attachment

Procedure

Create an inbox and send an email

  1. Create a dedicated inbox:
    • Use create_inbox with a username (e.g. hermes-agent)
    • The agent gets address: hermes-agent@agentmail.to
  2. Send an email:
    • Use send_message with inbox_id, to, subject, text
  3. Check for replies:
    • Use list_threads to see incoming conversations
    • Use get_thread to read a specific thread

Check incoming email

  1. Use list_inboxes to find your inbox ID
  2. Use list_threads with the inbox ID to see conversations
  3. Use get_thread to read a thread and its messages

Reply to an email

  1. Get the thread with get_thread
  2. Use reply_to_message with the message ID and your reply text

Example Workflows

Sign up for a service:

1. create_inbox (username: "signup-bot")
2. Use the inbox address to register on the service
3. list_threads to check for verification email
4. get_thread to read the verification code

Agent-to-human outreach:

1. create_inbox (username: "hermes-outreach")
2. send_message (to: user@example.com, subject: "Hello", text: "...")
3. list_threads to check for replies

Pitfalls

  • Free tier limited to 3 inboxes and 3,000 emails/month
  • Emails come from @agentmail.to domain on free tier (custom domains on paid plans)
  • Node.js (18+) is required for the MCP server (npx -y agentmail-mcp)
  • The mcp Python package must be installed: pip install mcp
  • Real-time inbound email (webhooks) requires a public server — use list_threads polling via cronjob instead for personal use

Verification

After setup, test with:

hermes --toolsets mcp -q "Create an AgentMail inbox called test-agent and tell me its email address"

You should see the new inbox address returned.

References

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