> ## Documentation Index
> Fetch the complete documentation index at: https://docs.agentcard.sh/llms.txt
> Use this file to discover all available pages before exploring further.

# Zinc

> This guide is coming soon.

This guide is not written yet.

To buy at Amazon, Walmart, Target, Best Buy and the other covered merchants with a Vault card today, use [Agentcard's Purchase API](/vault/integrations/ecommerce-apis/purchase-api). It builds the cart and completes checkout without any other ecommerce API.


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