tw-ecom-payment-ecpay

Apps & Automation

Integrate 綠界 (ECPay) for Taiwan e-commerce — credit card, ATM, CVS 代碼, 超商取貨付款, and CheckMacValue signature. Use when ECPay is the chosen PSP, setting up logistics-payment combined flows (超取+COD), computing or verifying CheckMacValue, or handling ECPay callbacks. Do NOT use for gateway selection or comparison (see tw-payment-integration). Do NOT use for non-ECPay providers. STATUS: SKELETON — body pending.

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How to use this skill

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Prompt to paste

I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/asgard-ai-platform/skills/blob/HEAD/tw-ecom-payment-ecpay/SKILL.md

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ECPay (綠界) Integration

STATUS: SKELETON — body pending.

When to use this skill

Integrating ECPay for credit card / ATM / CVS 代碼 / 超商取貨付款
Combining ECPay logistics + payment in one flow
Computing / verifying CheckMacValue signatures
Handling ECPay callback webhooks
Reconciliation with ECPay merchant portal

Do NOT use when

Non-ECPay provider → specific skill for that provider
Pure logistics (no payment) → tw-ecom-logistics-cvs

Core concepts

TODO: ECPay positioning, CheckMacValue signature, the 超取+COD combined model.

Decision tree

TODO: when ECPay's combined flow beats separating payment vs shipping.

Implementation guidance

TODO: merchant setup, first txn, COD-at-pickup reconciliation.

Gotchas

TODO: 5-6 pitfalls (CheckMacValue param ordering / URL encoding gotchas, COD settlement offset, 超取 failure refund flow, cross-sandbox credential leakage, 境外 card compatibility).

IRON LAW

TODO.

Output Format