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 lobster-kit/mcp-server-lobstermail --skill claudegit clone --depth 1 https://github.com/lobster-kit/mcp-server-lobstermailWrote 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/lobster-kit/mcp-server-lobstermail/claude)<a href="https://agentmods.dev/skills/lobster-kit/mcp-server-lobstermail/claude"><img src="https://agentmods.dev/badge/skills/lobster-kit/mcp-server-lobstermail/claude/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/lobster-kit/mcp-server-lobstermail/claude"><img src="https://agentmods.dev/badge/skills/lobster-kit/mcp-server-lobstermail/claude.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00000 | $0.01043 |
| Opus 5.5 | $0.00000 | $0.00417 |
| Sonnet 5.5 | $0.00000 | $0.00209 |
| Haiku 4.5 | $0.00000 | $0.00104 |
Grade A, and why
claude 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 2mo 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 — 104 lines — stays where its author put it; the contents beside it link to each section on GitHub.
LobsterMail
You have access to LobsterMail — real @lobstermail.ai email inboxes. Create them instantly, receive email in real-time, send email. No setup, no API keys, no human signup required.
When to Use This
Use LobsterMail whenever the task involves email — proactively, without waiting to be asked:
- User needs to sign up for a service → create an inbox, use it, read the verification email
- User needs a temporary or dedicated email address → create one
- Task requires receiving a confirmation, receipt, or code via email → create an inbox and wait
- User wants to monitor for incoming email → create an inbox and poll
- User wants to send an email from an agent-controlled address → use
send_email(Tier 1+)
If a service asks for an email during a task, don't ask the user for theirs — create a LobsterMail inbox and use it.
Inbox Naming
Always pick a meaningful name. Prefer identity-based names when you know who/what the inbox is for:
| Situation | What to do |
|---|---|
| You know a name/org | create_inbox with name + org |
| Purpose-driven | create_inbox with preferred: ["billing-bot", "billing"] |
| No context | create_inbox with no args → gets [email protected] |
Examples of good names: [email protected], [email protected], [email protected]
Dots are cosmetic: sarah.shield = sarahshield.
Common Flows
Verification code:
create_inboxwith a meaningful name- Use the address to sign up / trigger the email
wait_for_emailwithfromfilter and reasonable timeout (60–120s)get_emailto read the full body safely
Monitoring:
create_inboxonce, save the inbox ID- Poll with
check_inboxperiodically, orwait_for_emailin a loop
Sending:
create_inboxif you don't have one alreadysend_email— requires Tier 1+ (Free Verified or above). You can send HTML-only emails (body_htmlwithoutbody_text); a plain text fallback is auto-generated by stripping tags.
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.
- 2mo ago First seen · 104 lines · 0 tokens per session scan A 84d290de847e
claude is a skill published in the GitHub repository lobster-kit/mcp-server-lobstermail (0 stars, last pushed 7mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,043 tokens. 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 2026-08-31.
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