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 ashish7802/awesome-api-skills --skill postmarkgit clone --depth 1 https://github.com/ashish7802/awesome-api-skillsWrote 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/ashish7802/awesome-api-skills/postmark)<a href="https://agentmods.dev/skills/ashish7802/awesome-api-skills/postmark"><img src="https://agentmods.dev/badge/skills/ashish7802/awesome-api-skills/postmark/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/ashish7802/awesome-api-skills/postmark"><img src="https://agentmods.dev/badge/skills/ashish7802/awesome-api-skills/postmark.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 | $0.00392 |
| Opus 5 | $0.00000 | $0.00196 |
| Sonnet 5 | $0.00000 | $0.00078 |
| Haiku 4.5 | $0.00000 | $0.00039 |
Grade A, and why
postmark 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 2d 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
Postmark Transactional Email API Skill
Overview
Postmark specializes in lightning-fast transactional email delivery with industry-leading inbox placement, detailed bounce classification, and templating.
Installation
npm install postmark
Setup & Sending Emails
import { ServerClient } from 'postmark';
const client = new ServerClient(process.env.POSTMARK_SERVER_API_TOKEN!);
// Send single transactional email
await client.sendEmail({
From: '[email protected]',
To: '[email protected]',
Subject: 'Password Reset Request',
HtmlBody: '<p>Click <a href="https://example.com/reset">here</a> to reset your password.</p>',
TextBody: 'Visit https://example.com/reset to reset your password.',
MessageStream: 'outbound',
});
Sending via Postmark Template
await client.sendEmailWithTemplate({
From: '[email protected]',
To: '[email protected]',
TemplateAlias: 'welcome-email',
TemplateModel: {
name: 'Alex',
action_url: 'https://myverifieddomain.com/dashboard',
product_name: 'Awesome Platform',
},
});
AI Pitfalls & Anti-Hallucination Guidelines
- Token Confusion: Postmark has Account API Tokens (admin operations) and Server API Tokens (sending emails). Do not send emails using Account Tokens.
- Sender Signatures: Attempting to send from an unverified
Fromaddress will return an HTTP 422 error.
Production Verification Checklist
- SPF, DKIM, and DMARC DNS records configured on sending domain
- Inbound webhooks verified with IP filtering or basic auth
- Bounce webhook configured to suppress inactive email addresses
Last Verified: 2026-07-03
What ships with it
1 file 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.
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.
- 2d ago First seen · 53 lines · 0 tokens per session scan A a232289c9c3f
postmark is a skill published in the GitHub repository ashish7802/awesome-api-skills (13 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 392 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 2026-09-10.
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