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 skills add Atomic-Mail/atomic-mail-agentic --skill atomicmailgit clone --depth 1 https://github.com/Atomic-Mail/atomic-mail-agenticWrote 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.
[](https://agentmods.dev/skills/atomic-mail/atomic-mail-agentic/atomicmail)<a href="https://agentmods.dev/skills/atomic-mail/atomic-mail-agentic/atomicmail"><img src="https://agentmods.dev/badge/skills/atomic-mail/atomic-mail-agentic/atomicmail/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.
<a href="https://agentmods.dev/skills/atomic-mail/atomic-mail-agentic/atomicmail"><img src="https://agentmods.dev/badge/skills/atomic-mail/atomic-mail-agentic/atomicmail.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 7 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Privilege Escalation · line 44 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
- high Privilege Escalation · line 45 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
- high Privilege Escalation · line 47 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
- high Privilege Escalation · line 98 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
- high Privilege Escalation · line 234 Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
- medium Rogue Agent · line 3 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
- medium Rogue Agent · line 221 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 | $0.00054 | $0.02702 |
| Opus 5.5 | $0.00022 | $0.01081 |
| Sonnet 5.5 | $0.00011 | $0.00540 |
| Haiku 4.5 | $0.00005 | $0.00270 |
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 25d 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 — 253 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) or the
package README (
atomicmail help --topic readme).
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
{baseDir}/scripts/atomicmail register --username "myagent"
{baseDir}/scripts/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)
{baseDir}/scripts/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
60 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.
- lib/esm/_dnt.polyfills.d.ts 3.9 KB runs code
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- lib/esm/lib/agent/jmap/agent-help-content.d.ts 89 B runs code
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- lib/esm/lib/agent/jmap/agent-jmap-verify.d.ts 488 B runs code
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- lib/esm/lib/agent/jmap/help-content/cron.d.ts 225 B runs code
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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.
- 25d ago Changed · +2 lines 94a18af2fba6
- 29d ago Changed · -12 lines b4678e980801
- 1mo ago First seen · 263 lines · 54 tokens per session scan A d478832a8e52
atomicmail is a skill published in the GitHub repository Atomic-Mail/atomic-mail-agentic (262 stars, last pushed yesterday), licensed MIT. It adds 54 tokens to every session and 2,702 once invoked, about $0.0002 per session on Opus 5.5. 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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