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 sinch/sinch-plugins --skill sinch-email-mailgun-sendgit clone --depth 1 https://github.com/sinch/sinch-pluginsWrote 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/sinch/sinch-plugins/sinch-email-mailgun-send)<a href="https://agentmods.dev/skills/sinch/sinch-plugins/sinch-email-mailgun-send"><img src="https://agentmods.dev/badge/skills/sinch/sinch-plugins/sinch-email-mailgun-send/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/sinch/sinch-plugins/sinch-email-mailgun-send"><img src="https://agentmods.dev/badge/skills/sinch/sinch-plugins/sinch-email-mailgun-send.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 | $0.00018 | $0.00585 |
| Opus 5 | $0.00009 | $0.00293 |
| Sonnet 5 | $0.00004 | $0.00117 |
| Haiku 4.5 | $0.00002 | $0.00059 |
Grade A, and why
sinch-email-mailgun-send 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.
What it actually says
Send Email via Mailgun
Send a transactional email using the Mailgun Email API. Uses HTTP Basic Auth (api:API_KEY). Region: US (api.mailgun.net) or EU (api.eu.mailgun.net).
IMPORTANT: Execute this command directly. Do NOT generate script files. Perform the API call immediately.
Input
--from/-f: Sender (e.g. "Sender [email protected]") - required--to/-t: Recipient email address - required--subject/-s: Email subject - required--text/-T: Plain text body - optional (use with or without --html)--html/-H: HTML body - optional--domain/-d: Sending domain (must be verified in Mailgun) - required, or use MAILGUN_DOMAIN env
Arguments: $ARGUMENTS
Instructions
Execute these steps directly - do not write code or scripts:
-
If $ARGUMENTS empty: ask for from, to, subject, and text or html body. Otherwise parse.
-
Validate: --from, --to, --subject; at least one of --text or --html. --domain or MAILGUN_DOMAIN. Get MAILGUN_API_KEY and MAILGUN_DOMAIN from env. Use MAILGUN_REGION (us or eu) for base URL: api.mailgun.net (US) or api.eu.mailgun.net (EU). If missing, report "Mailgun is not configured. Set MAILGUN_API_KEY, MAILGUN_DOMAIN, and optionally MAILGUN_REGION."
-
POST https://{api_host}/v3/{domain}/messages with Basic Auth (username "api", password API_KEY). Form or JSON: from, to, subject, text, html.
-
On success: "✅ Email sent" with message ID. Handle 401, 400, 404 with clear messages.
-
Handle all errors gracefully.
Examples
/sinch-email-mailgun-send --from="Sender <[email protected]>" [email protected] --subject="Hello" --text="Hello from Mailgun"
/sinch-email-mailgun-send -f "Me <[email protected]>" -t [email protected] -s "Test" --html="<p>Hi</p>"
API Reference
- US: https://api.mailgun.net/v3/{domain}/messages
- EU: https://api.eu.mailgun.net/v3/{domain}/messages
- Auth: Basic api:API_KEY
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 · 49 lines · 18 tokens per session scan A 394b7ac407c4
sinch-email-mailgun-send is a skill published in the GitHub repository sinch/sinch-plugins (6 stars, last pushed 27d ago), licensed Apache-2.0. It adds 18 tokens to every session and 585 once invoked, about $0.0001 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 2026-08-31.
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