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-optimizegit 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-optimize)<a href="https://agentmods.dev/skills/sinch/sinch-plugins/sinch-email-mailgun-optimize"><img src="https://agentmods.dev/badge/skills/sinch/sinch-plugins/sinch-email-mailgun-optimize/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-optimize"><img src="https://agentmods.dev/badge/skills/sinch/sinch-plugins/sinch-email-mailgun-optimize.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 | $0.00023 | $0.00424 |
| Opus 5 | $0.00012 | $0.00212 |
| Sonnet 5 | $0.00005 | $0.00085 |
| Haiku 4.5 | $0.00002 | $0.00042 |
Grade A, and why
sinch-email-mailgun-optimize 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
Mailgun Optimize (InboxReady)
Check email deliverability, blocklist status, and domain health using Mailgun Optimize (InboxReady). List monitored domains, check reputation, test inbox placement. Uses Basic Auth (api:API_KEY).
IMPORTANT: Execute this command directly. Do NOT generate script files. Perform the API call immediately.
Input
--action/-a: Action: list-domains, check-blocklist, health - optional, default list-domains--domain/-d: Domain to check (for blocklist/health) - optional--format/-f: Output format (table or json) - optional
Arguments: $ARGUMENTS
Instructions
Execute these steps directly - do not write code or scripts:
-
If $ARGUMENTS empty: ask what to do (list monitored domains, check blocklist, check domain health). Otherwise parse.
-
Validate: --action, optional --domain. Get MAILGUN_API_KEY. Base: api.mailgun.net. If missing, report "Mailgun is not configured."
-
GET https://api.mailgun.net/v1/inboxready/domains (or relevant Optimize endpoint per action) with Basic Auth (api:API_KEY). For domain-specific checks use appropriate endpoint and --domain.
-
Display: list of domains, blocklist status, or health summary. "✅ Optimize results". Handle 401, 404.
-
Handle all errors gracefully.
Examples
/sinch-email-mailgun-optimize
/sinch-email-mailgun-optimize --action=list-domains
/sinch-email-mailgun-optimize --action=check-blocklist --domain=mydomain.com
API Reference
- Endpoint: GET /v1/inboxready/domains and other InboxReady endpoints
- 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 · 46 lines · 23 tokens per session scan A 3df141560713
sinch-email-mailgun-optimize is a skill published in the GitHub repository sinch/sinch-plugins (6 stars, last pushed 27d ago), licensed Apache-2.0. It adds 23 tokens to every session and 424 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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