# Page Not Found

The URL `usage/middleware` does not exist.

You might be looking for one of these pages:
- [Middleware](https://docs.wdk.tether.io/sdk/core-module/usage/middleware.md)
- [Usage](https://docs.wdk.tether.io/sdk/core-module/usage.md)
- [wallet-spark](https://docs.wdk.tether.io/sdk/wallet-modules/wallet-spark.md)
- [Getting Started](https://docs.wdk.tether.io/sdk/core-module/usage/getting-started.md)
- [Usage](https://docs.wdk.tether.io/sdk/wallet-modules/wallet-tron/usage.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://docs.wdk.tether.io/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://docs.wdk.tether.io/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/sdk/core-module/usage/middleware.md`)
- Use `Accept: text/markdown` header for content negotiation