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Support for small merchants: reads customer emails, checks orders and refunds in Stripe, PayPal, Square or Shopify, and drafts replies in the owner's voice per your refund policy; can refund via Stripe or Square after explicit approval. Works with pasted emails too. Official from Anthropic.

Stripe's official plugin: bundles the remote Stripe MCP with skills for integration best practices, Connect, Stripe Apps and API upgrades, plus commands that explain errors and list test card numbers. Available in the official Claude and Codex marketplaces.