# @libp2p/multistream-select

> JavaScript implementation of multistream-select

Latest version **7.0.28** (published 2026-08-31) · Apache-2.0 OR MIT license · 0 weekly downloads

## Install

```sh
npm install @libp2p/multistream-select
pnpm add @libp2p/multistream-select
yarn add @libp2p/multistream-select
bun add @libp2p/multistream-select
```

## Health

**Score 75/100 (B)** — status: active.

Positive: has types; esm support; no vulnerabilities; has provenance; recently updated; high maintenance score; high quality score.

Warnings: low downloads.

## Facts

| | |
|---|---|
| Version | 7.0.28 |
| Published | 2026-08-31 |
| First published | 2022-02-17 |
| Weekly downloads | 0 |
| License | Apache-2.0 OR MIT |
| TypeScript types | bundled |
| Module format | ESM |
| Dependencies | 5 |
| Unpacked size | 282.2 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Provenance | attested (GitHub Actions) |
| GitHub stars | 2579 |
| Maintainers | daviddias, alanshaw, achingbrain, vascosantos, npm-service-account-libp2p, jacobheun |
| Keywords | ipfs, libp2p, multistream, protocol, stream |

## Links

- npm: https://www.npmjs.com/package/@libp2p/multistream-select
- Repository: https://github.com/libp2p/js-libp2p
- Homepage: https://github.com/libp2p/js-libp2p/tree/main/packages/multistream-select#readme
- Issues: https://github.com/libp2p/js-libp2p/issues
- npm.io page: https://npm.io/package/@libp2p/multistream-select

## Dependencies (5)

- [uint8arrays](https://npm.io/package/uint8arrays.md) ^6.1.1
- [@libp2p/utils](https://npm.io/package/@libp2p/utils.md) ^7.4.1
- [uint8arraylist](https://npm.io/package/uint8arraylist.md) ^3.0.2
- [@libp2p/interface](https://npm.io/package/@libp2p/interface.md) ^3.3.0
- [it-length-prefixed](https://npm.io/package/it-length-prefixed.md) ^11.0.1

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## Recent versions

- 7.0.28 (latest) — 2026-08-31
- 7.0.28-5cb617ae2 (next) — 2026-09-02
- 7.0.28-185d901cd — 2026-09-02
- 7.0.27-cef4d32cf — 2026-08-31
- 7.0.27-ac7305ccf — 2026-08-31
- 7.0.27-87dca02b0 — 2026-08-27
- 7.0.27-4a6c5d11a — 2026-08-27
- 7.0.27 — 2026-08-23
- 7.0.26-947d304ed — 2026-08-22
- 7.0.26-0967e75f5 — 2026-08-22
- 7.0.26-4dae661b4 — 2026-08-22
- 7.0.26-8786aa8d0 — 2026-08-20
- 7.0.26-55d7a539a — 2026-08-20
- 7.0.26-d5534174d — 2026-08-13
- 7.0.26-47cf9cdc1 — 2026-08-10
- … 895 more at https://npm.io/package/@libp2p/multistream-select/versions

## README

# @libp2p/multistream-select

[![libp2p.io](https://img.shields.io/badge/project-libp2p-yellow.svg?style=flat-square)](http://libp2p.io/)
[![Discuss](https://img.shields.io/discourse/https/discuss.libp2p.io/posts.svg?style=flat-square)](https://discuss.libp2p.io)
[![codecov](https://img.shields.io/codecov/c/github/libp2p/js-libp2p.svg?style=flat-square)](https://codecov.io/gh/libp2p/js-libp2p)
[![CI](https://img.shields.io/github/actions/workflow/status/libp2p/js-libp2p/main.yml?branch=main\&style=flat-square)](https://github.com/libp2p/js-libp2p/actions/workflows/main.yml?query=branch%3Amain)

> JavaScript implementation of multistream-select

# About

<!--

!IMPORTANT!

Everything in this README between "# About" and "# Install" is automatically
generated and will be overwritten the next time the doc generator is run.

To make changes to this section, please update the @packageDocumentation section
of src/index.js or src/index.ts

To experiment with formatting, please run "npm run docs" from the root of this
repo and examine the changes made.

-->

multistream-select is protocol multiplexing per connection/stream. [Full spec here](https://github.com/multiformats/multistream-select)

## Select a protocol flow

The caller will send "interactive" messages, expecting for some acknowledgement from the callee, which will "select" the handler for the desired and supported protocol:

```
< /multistream-select/0.3.0  # i speak multistream-select/0.3.0
> /multistream-select/0.3.0  # ok, let's speak multistream-select/0.3.0
> /ipfs-dht/0.2.3            # i want to speak ipfs-dht/0.2.3
< na                         # ipfs-dht/0.2.3 is not available
> /ipfs-dht/0.1.9            # What about ipfs-dht/0.1.9 ?
< /ipfs-dht/0.1.9            # ok let's speak ipfs-dht/0.1.9 -- in a sense acts as an ACK
> <dht-message>
> <dht-message>
> <dht-message>
```

# Install

```console
$ npm i @libp2p/multistream-select
```

## Browser `<script>` tag

Loading this module through a script tag will make its exports available as `Libp2pMultistreamSelect` in the global namespace.

```html
<script src="https://unpkg.com/@libp2p/multistream-select/dist/index.min.js"></script>
```

# API Docs

- <https://libp2p.github.io/js-libp2p/modules/_libp2p_multistream-select.html>

# License

Licensed under either of

- Apache 2.0, ([LICENSE-APACHE](https://github.com/libp2p/js-libp2p/blob/main/packages/multistream-select/LICENSE-APACHE) / <http://www.apache.org/licenses/LICENSE-2.0>)
- MIT ([LICENSE-MIT](https://github.com/libp2p/js-libp2p/blob/main/packages/multistream-select/LICENSE-MIT) / <http://opensource.org/licenses/MIT>)

# Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

---
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