> For the complete documentation index, see [llms.txt](https://firehose.streamingfast.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://firehose.streamingfast.io/references/indexing.md).

# Indexing

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**Deprecation Notice**: Firehose indexing and transforms are legacy features primarily used for graph-node integration. For new projects, use [Substreams](https://substreams.streamingfast.io/) for data filtering and transformation.
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For documentation on legacy Firehose indexing, see [Legacy Firehose Indexing](/references/legacy-indexing.md).