It seems the link of changing account type(Sandbox) is broken and there is no one for support or even any response to this problem. no help, no support, no response and even no way to contact.
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- Buy APIs (BETA) - Order
- Buy APIs - Browse
- Feedback, Comments, Suggestions
- New Sell APIs - Account, Inventory, Catalog and Compliance
- New Sell APIs - Fulfillment
- New Sell APIs - Marketing, Analytics, Metadata
- Post Order APIs - Cancellation
- Post Order APIs - Inquiry, Case Management
- Post Order APIs - Return
- Talk to your fellow developers
- Token, Messaging, Sandbox related issues
- eBay APIs: .NET SDK for Trading API
- eBay APIs: Java SDK for Trading API
- eBay APIs: Orders, resolutions and feedback
- eBay APIs: Search
- eBay APIs: Selling
- Sign in