# Axiom Payments

Use when accepting ANY real-world payment, Apple Pay, Wallet passes, Tap to Pay...

- Repository: https://github.com/CharlesWiltgen/Axiom (1242 stars)
- Category: Engineering
- License: MIT
- Last updated: 2026-10-31
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add CharlesWiltgen/Axiom --skill axiom-payments -g -a claude-code -y`
Codex: `npx skills add CharlesWiltgen/Axiom --skill axiom-payments -g -a codex -y`
Cursor: `npx skills add CharlesWiltgen/Axiom --skill axiom-payments -g -a cursor -y`
Gemini CLI: `npx skills add CharlesWiltgen/Axiom --skill axiom-payments -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add CharlesWiltgen/Axiom`

## Description

Use when accepting ANY real-world payment, Apple Pay, Wallet passes, Tap to Pay, Orders in Wallet. NOT in-app purchase / digital content (use axiom-integration). Covers entitlements, certs, signing, App Review payment rules.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# Real-World Payments (Apple Pay / Wallet / Tap to Pay)

**You MUST use this skill when accepting ANY real-world payment, physical goods, services, donations, ticketing, loyalty cards, contactless card-present, or post-purchase order tracking. NOT for in-app purchase or digital content.**

## When to Use

Use this skill when you encounter:
- Adding Apple Pay to an iOS / iPadOS / macOS / Catalyst / visionOS / watchOS app
- Adding Apple Pay to a website (Apple Pay JS or W3C Payment Request API)
- Building Wallet passes (boarding passes, event tickets, coupons, loyalty cards, store cards)
- Accepting contactless card payments on iPhone (Tap to Pay on iPhone / ProximityReader)
- Surfacing post-purchase order tracking in Wallet (Orders in Wallet, FinanceKitUI add-order helpers)
- Issuer or bank card provisioning into Wallet (issuer extensions)
- Apple Pay merchant ID, processing certificate, or merchant identity certificate setup
- Pass Type ID or Order Type ID certificates and PKCS #7 signing chains
- Tap to Pay managed entitlement (`com.apple.developer.proximity-reader.payment.acceptance`)
- App Review rejections that mention payments, IAP, Apple Pay, Wallet, or Acceptable Use Guidelines
- Domain verification for Apple Pay on the web (`.well-known/apple-developer-merchantid-domain-association.txt`)
- Sandbox testing with Apple Pay sandbox cards or sandbox tester accounts

## When NOT to Use

The rest: https://github.com/CharlesWiltgen/Axiom/blob/HEAD/.claude-plugin/plugins/axiom/skills/axiom-payments/SKILL.md