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 humanerd-drew/opencode-drewgent --skill korean-payment-integrationgit clone --depth 1 https://github.com/humanerd-drew/opencode-drewgentWrote 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/humanerd-drew/opencode-drewgent/korean-payment-integration)<a href="https://agentmods.dev/skills/humanerd-drew/opencode-drewgent/korean-payment-integration"><img src="https://agentmods.dev/badge/skills/humanerd-drew/opencode-drewgent/korean-payment-integration.svg" alt="Measured on agentmods" 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 | $0.00070 | $0.00905 |
| Opus 5 | $0.00035 | $0.00452 |
| Sonnet 5 | $0.00014 | $0.00181 |
| Haiku 4.5 | $0.00007 | $0.00090 |
Grade A, and why
korean-payment-integration 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 3d 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 — 118 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Korean Payment Gateway Integration (PortOne V2 + D1)
When to Use
Integrating PortOne (포트원) V2 SDK with KG이니시스, 카카오페이, or other Korean PGs into a Cloudflare Workers SPA.
Architecture
Frontend (PortOne SDK) → Backend (CF Worker) → D1 Database
│ │
├─ requestPayment() ├─ POST /api/payment/verify
│ with storeId + │ (verify + save)
│ channelKey + customer │
│ ├─ GET /api/payment/check
└─ fingerprint-based │ (purchase lookup)
localStorage cache └─ PortOne API verify
PortOne V2 SDK Setup
CDN Script (in index.html)
<script src="https://cdn.portone.io/v2/browser-sdk.js"></script>
Configuration
const PORTONE_CONFIG = {
storeId: 'store-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx',
channelKeys: {
naverpay: 'channel-key-...', // KG이니시스
kakaopay: 'channel-key-...', // 카카오페이
card: 'channel-key-...', // 한국결제네트웍스
},
};
requestPayment Parameters
const response = await window.PortOne.requestPayment({
storeId, channelKey, paymentId, orderName,
totalAmount: 10000, // integer, KRW won
currency: 'KRW',
payMethod: 'EASY_PAY', // or 'CARD'
easyPay: { easyPayProvider: 'NAVERPAY' },
customer: { email, fullName, phoneNumber },
redirectUrl: window.location.href, // mobile redirect
});
PayMethod Mapping
| Method | payMethod | easyPayProvider |
|---|---|---|
| 네이버페이 | EASY_PAY | NAVERPAY |
| 카카오페이 | EASY_PAY | KAKAOPAY |
| 신용카드 | CARD | (none) |
Per-Entity Purchase Tracking
For apps where purchase is tied to a specific entity (record, chart, document, etc.), NOT to the user account. Each unique entity requires its own purchase.
function getEntityFingerprint(entity) {
// deterministic fingerprint from entity fields
return `${entity.id}_${entity.type}_${entity.hash}`.replace(/\s+/g, '');
}
function getPurchaseKey(reportType, entity) {
return `${reportType}_${getEntityFingerprint(entity)}`;
}
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.
- 3d ago First seen · 118 lines · 70 tokens per session scan A d28dbe3fe4e5
korean-payment-integration is a skill published in the GitHub repository humanerd-drew/opencode-drewgent (2 stars, last pushed 1mo ago), licensed MIT. It adds 70 tokens to every session and 905 once invoked, about $0.0003 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 2026-09-03.
Other skills, from other repositories
convex-billing
Add Stripe billing/payments to the Convex app via @convex-dev/stripe (checkout + webhook + gating).
cloudbase-wechat-integration
A guide for connecting CloudBase applications to WeChat services, including payments, official accounts, and user identity.
commerce-app-business-config
Manage custom business configuration in an Adobe Commerce app. Use when the user wants to add, modify, or remove merchant-configurable settings (config fields, admin config, store configuration) exposed through Commerce Admin. Creates typed config fields (text, password, email, url, tel, boolean, list) in…
baselinker-webhooks
Receive BaseLinker (Base.com) webhooks. Use when building a BaseLinker order or warehouse callback receiver, because BaseLinker is not a normal webhook source: deliveries arrive as HTTP HEAD requests with NO body, the entire payload is in the query string (observed params: orderid, state), there is NO signature…
tiktok-shop-webhooks
Receive and verify TikTok Shop webhooks. Use when setting up TikTok Shop webhook handlers, debugging Authorization-header signature verification, or handling events like ORDERSTATUSCHANGE, PACKAGEUPDATE, RECIPIENTADDRESSUPDATE, PRODUCTSTATUSCHANGE, or SELLERDEAUTHORIZATION.
gplay-purchase-verification
Server-side purchase verification for in-app products and subscriptions using Google Play Developer API. Use when implementing receipt validation in your backend.