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-inspectgit 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-inspect)<a href="https://agentmods.dev/skills/sinch/sinch-plugins/sinch-email-mailgun-inspect"><img src="https://agentmods.dev/badge/skills/sinch/sinch-plugins/sinch-email-mailgun-inspect/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-inspect"><img src="https://agentmods.dev/badge/skills/sinch/sinch-plugins/sinch-email-mailgun-inspect.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 | $0.00020 | $0.00415 |
| Opus 5 | $0.00010 | $0.00208 |
| Sonnet 5 | $0.00004 | $0.00083 |
| Haiku 4.5 | $0.00002 | $0.00042 |
Grade A, and why
sinch-email-mailgun-inspect 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 11d 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
Inspect Email (Mailgun Inspect)
Submit HTML or email content to Mailgun Inspect for accessibility testing, link validation, image validation, and pre-send quality checks. Uses Basic Auth (api:API_KEY).
IMPORTANT: Execute this command directly. Do NOT generate script files. Perform the API call immediately.
Input
--html/-H: HTML content to inspect (inline or path to file) - required--type/-t: Inspection type: accessibility, links, images - optional, default accessibility
Arguments: $ARGUMENTS
Instructions
Execute these steps directly - do not write code or scripts:
-
If $ARGUMENTS empty: ask for HTML content (paste or file path) and inspection type. Otherwise parse.
-
Validate: --html (non-empty or path to readable file). Get MAILGUN_API_KEY. Base: api.mailgun.net or api.eu.mailgun.net. If missing, report "Mailgun is not configured."
-
POST https://api.mailgun.net/v1/inspect/accessibility (or relevant /v1/inspect/* endpoint) with Basic Auth, Content-Type application/json, body: { "html": "..." }. Adjust endpoint for links/images if --type specified.
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Display results: accessibility issues, link validity, image issues, etc. "✅ Inspection complete". Handle 401, 400.
-
Handle all errors gracefully.
Examples
/sinch-email-mailgun-inspect --html="<html><body><h1>Hello</h1></body></html>"
/sinch-email-mailgun-inspect --type=accessibility -H "<p>Content</p>"
API Reference
- Endpoint: POST /v1/inspect/accessibility (and other inspect 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.
- 11d ago First seen · 44 lines · 20 tokens per session scan A ff68f685237c
sinch-email-mailgun-inspect is a skill published in the GitHub repository sinch/sinch-plugins (6 stars, last pushed 28d ago), licensed Apache-2.0. It adds 20 tokens to every session and 415 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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effort
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critique
Expertise in auditing and fixing repository scripts and GitHub Actions workflows to ensure technical robustness and security.
prs
Expertise in managing the Git and GitHub Pull Request lifecycle, including staging changes, generating PR descriptions, and branch management.
pirate-skill
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quality
Evaluates whether a GitHub issue is spam, empty, needs more information, or is OK to proceed.