> For the complete documentation index, see [llms.txt](https://docs.substreams.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.substreams.dev/how-to-guides/sinks/stream.md).

# Substreams:Stream

The **Substreams:Stream service** allows you to stream blockchain data from your [JavaScript](/how-to-guides/sinks/stream/javascript.md), [GO](/how-to-guides/sinks/stream/go.md), [Rust](https://github.com/streamingfast/substreams-sink-rust), or [Python](https://github.com/streamingfast/substreams-sink-examples/tree/master/python) application.

<figure><img src="https://2510971185-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FerQrzMtqELZRGAdugCR2%2Fuploads%2Fgit-blob-0e017621cbbc974840ce032bff9366365eb8edbc%2Fservice-stream.png?alt=media" alt="" width="100%"><figcaption></figcaption></figure>