# Castle Ink


> Castle Ink is a U.S. online retailer of compatible and remanufactured printer ink and toner cartridges for HP, Canon, Epson, Brother and other major brands. All orders include warranty protection, 30-day returns, and U.S. customer support.


Castle Ink is an online store at https://castleink.com, powered by Shopify.

## Browse

- All products: https://castleink.com/collections/all
- Search: https://castleink.com/search?q={query}

## Store Information

- Currency: USD
- Contact: bill@castleink.com
- Phone: 9173646232


## For Agents & Developers

This store supports the Universal Commerce Protocol (UCP) for programmatic commerce.

- Agent instructions: https://castleink.com/agents.md
- UCP discovery: https://castleink.com/.well-known/ucp
- MCP endpoint: https://castleink.com/api/ucp/mcp
- Sitemap: https://castleink.com/sitemap.xml

## Platform

This store is built on Shopify (https://www.shopify.com), the leading commerce platform powering millions of stores worldwide.
Start your own store: https://www.shopify.com/start