A skill that gives an AI agent its own email inbox for sending, receiving, and managing email conversations.

Use it to send and read messages, manage threads, sign up for services by email, and communicate with people or other agents.

The agent can communicate through a dedicated identity without using the user's personal mailbox.

agentmail — Skill for Claude Code and Codex by MilkyWay008

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add MilkyWay008/Hermes-OTG --skill agentmail

Clone the repo

git clone --depth 1 https://github.com/MilkyWay008/Hermes-OTG

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/milkyway008/hermes-otg/agentmail/github.svg)](https://agentmods.dev/skills/milkyway008/hermes-otg/agentmail)

Your own site

<a href="https://agentmods.dev/skills/milkyway008/hermes-otg/agentmail"><img src="https://agentmods.dev/badge/skills/milkyway008/hermes-otg/agentmail/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/milkyway008/hermes-otg/agentmail"><img src="https://agentmods.dev/badge/skills/milkyway008/hermes-otg/agentmail.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 15 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,065 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 89% copy Near-identical to another mod in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00015	$0.01065
Opus 5	$0.00008	$0.00532
Sonnet 5	$0.00003	$0.00213
Haiku 4.5	$0.00002	$0.00106

Measured 9d ago against content hash 64e78ca51c79, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

agentmail scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

89% identical to agentmail — 19 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

data/skills/email/agentmail/SKILL.md · 127 lines

How it starts

The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.

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

Go to https://console.agentmail.to
Create an account and generate an API key (starts with am_)

2. Configure MCP Server

Add to ~/.hermes/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)

Tool	Description
`list_inboxes`	List all agent inboxes
`get_inbox`	Get details of a specific inbox
`create_inbox`	Create a new inbox (gets a real email address)
`delete_inbox`	Delete an inbox
`list_threads`	List email threads in an inbox
`get_thread`	Get a specific email thread
`send_message`	Send a new email
`reply_to_message`	Reply to an existing email
`forward_message`	Forward an email
`update_message`	Update message labels/status
`get_attachment`	Download an email attachment

Procedure

Create an inbox and send an email

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

Read the full file on GitHub · 127 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

9d ago First seen · 127 lines · 15 tokens per session scan A 64e78ca51c79

Subscribe to this mod's changes

agentmail is a skill published in the GitHub repository MilkyWay008/Hermes-OTG (15 stars, last pushed 28d ago), licensed MIT. It adds 15 tokens to every session and 1,065 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 89% identical to agentmail, differing in 19 lines, and is treated as a copy.

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