# Page Not Found

The URL `reference-material/substreams-cli/authentication` does not exist.

You might be looking for one of these pages:
- [Substreams CLI Authentication](https://docs.substreams.dev/how-to-guides/installing-the-cli/authentication.md)
- [Architecture & Parallel Execution](https://docs.substreams.dev/reference-material/core-concepts/architecture.md)
- [Aggregation Windows](https://docs.substreams.dev/reference-material/manifest-and-components/aggregation-windows.md)
- [Testing](https://docs.substreams.dev/reference-material/development-tools/testing.md)
- [Module Outputs](https://docs.substreams.dev/reference-material/manifest-and-components/outputs.md)

## How to find the correct page

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

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/how-to-guides/installing-the-cli/authentication.md`)
- Use `Accept: text/markdown` header for content negotiation