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.
npx agentmods add skills/atomic-mail/atomic-mail-agentic/docsnpx skills add Atomic-Mail/atomic-mail-agentic --skill docsgit clone --depth 1 https://github.com/Atomic-Mail/atomic-mail-agenticWhat 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 | $0.00054 | $0.02025 |
| Opus 5 | $0.00027 | $0.01012 |
| Sonnet 5 | $0.00011 | $0.00405 |
| Haiku 4.5 | $0.00005 | $0.00202 |
Grade A, and why
atomicmail 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 2d 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.
How it starts
The opening of the file, as written. The whole thing — 199 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Atomic Mail
Atomic Mail exposes a programmable inbox over JMAP with PoW signup and JWT
rotation. This skill ships a single CLI entrypoint with three commands:
register, jmap_request, and help — matching the MCP server.
When to use this skill
- Register a new inbox or log in with an existing API key.
- Send JMAP batches (inline JSON or preset files).
- Read built-in documentation (JMAP cheatsheet, presets, troubleshooting).
In this skill runtime,
atomicmail help --topic readmeintentionally returns a short stub.
Call atomicmail help early and often — before guessing
placeholders, using URNs, or cron setup. Start with help --topic overview,
then presets before custom jmap_request calls and cron after register.
If installed behavior disagrees with docs elsewhere, trust help from the running
package.
Commands
npx --package=@atomicmail/agent-skill-gh-pages atomicmail register --username "myagent" --watch scheduled
npx --package=@atomicmail/agent-skill-gh-pages atomicmail jmap_request --ops-file list_inbox.json
Run atomicmail --help or atomicmail <command> --help for flags.
Defaults
authUrl:https://auth.atomicmail.aiapiUrl:https://api.atomicmail.ai- credentials directory:
~/.atomicmail
Workflow
1. Register (new account)
npx --package=@atomicmail/agent-skill-gh-pages atomicmail register \
--username "alice" \
--watch scheduled
--watch is required — it is your operator's decision, not yours; ask them.
Run register with no --watch to see the accepted values (each is a real
choice about how the operator works, so neither is a safe default to guess). On
the scheduling value, register prints the per-host schedule setup command.
Writes credentials.json, session.jwt, capability.jwt. Prints JSON
including inbox and accountId.
Required next step: the watch value decides who reads the inbox (see
Inbox checks). On scheduled, schedule a daily
agent turn with list_inbox.json on your runtime's own scheduler — never at
the OS level, and never cron atomicmail jmap_request alone.
What ships with it
21 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- .vitepress/config.mts 2.5 KB
- .vitepress/theme/custom.css 666 B
- .vitepress/theme/index.ts 451 B runs code
- core.md 1.8 KB
- custom-domains.md 4.9 KB
- dify.md 3.6 KB
- examples.md 11 KB
- getting-started.md 5.0 KB
- index.md 1.2 KB
- jmap-using.md 2.1 KB
- jmap.md 9.9 KB
- langchain.md 3.7 KB
- make.md 6.6 KB
- mcp-remote.md 6.7 KB
- mcp.md 13 KB
- n8n.md 9.2 KB
- oauth.md 14 KB
- public/favicon.ico 15 KB
- public/fonts/UncutSans-Variable.woff2 76 KB
- rest-auth.md 3.7 KB
- skill-install.md 8.7 KB
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.
- 2d ago First seen · 199 lines · 54 tokens per session scan A 48e7d19e3351
atomicmail is a skill published in the GitHub repository Atomic-Mail/atomic-mail-agentic (256 stars, last pushed 6d ago), licensed MIT. It adds 54 tokens to every session and 2,025 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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