> 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="/files/1qElju0ulF3s8rzEFf7C" alt="" width="100%"><figcaption></figcaption></figure>