# nautilus-plugin
[](https://github.com/nautechsystems/nautilus_trader/actions/workflows/build.yml)
[](https://docs.rs/nautilus-plugin/latest/nautilus-plugin/)
[](https://crates.io/crates/nautilus-plugin)

[](https://discord.gg/NautilusTrader)
Plug-in artifact identity and boundary primitives for
[NautilusTrader](https://nautilustrader.io).
The `nautilus-plugin` crate provides the public contract that lets an independently compiled Rust
cdylib carry a versioned identity. It defines versioned build metadata, allocator-safe boundary
values, opaque boundary tokens, and the `nautilus_plugin!` macro for exporting the standard entry
symbol and manifest.
This crate gives plug-in artifacts a consistent identity and a compact contract.
## NautilusTrader
[NautilusTrader](https://nautilustrader.io) is an open-source, production-grade, Rust-native
engine for multi-asset, multi-venue trading systems.
The system spans research, deterministic simulation, and live execution within a single
event-driven architecture, providing research-to-live semantic parity.
## Feature flags
This crate provides feature flags to control source code inclusion during compilation:
- `host`: Optional plug-in manifest compatibility flag.
## Documentation
See [the docs](https://docs.rs/nautilus-plugin) for the API reference.
## License
The source code for NautilusTrader is available on GitHub under the [GNU Lesser General Public License v3.0](https://www.gnu.org/licenses/lgpl-3.0.en.html).
---
NautilusTraderâ„¢ is developed and maintained by Nautech Systems, a technology
company specializing in the development of high-performance trading systems.
For more information, visit <https://nautilustrader.io>.
Use of this software is subject to the [Disclaimer](https://nautilustrader.io/legal/disclaimer/).
<img src="https://github.com/nautechsystems/nautilus_trader/raw/develop/assets/nautilus-logo-white.png" alt="logo" width="300" height="auto"/>
© 2015-2026 Nautech Systems Pty Ltd. All rights reserved.