# Launching LangServe from a Package You can also launch LangServe directly from a package, without having to pull it into a project. This can be useful when you are developing a package and want to test it quickly. The downside of this is that it gives you a little less control over how the LangServe APIs are configured, which is why for proper projects we recommend creating a full project. In order to do this, first change your working directory to the package itself. For example, if you are currently in this `templates` module, you can go into the `pirate-speak` package with: ```shell cd pirate-speak ``` Inside this package there is a `pyproject.toml` file. This file contains a `tool.langchain` section that contains information on how this package should be used. For example, in `pirate-speak` we see: ```text [tool.langserve] export_module = "pirate_speak.chain" export_attr = "chain" ``` This information can be used to launch a LangServe instance automatically. In order to do this, first make sure the CLI is installed: ```shell pip install -U langchain-cli ``` You can then run: ```shell langchain template serve ``` This will spin up endpoints, documentation, and playground for this chain. For example, you can access the playground at [http://127.0.0.1:8000/playground/](http://127.0.0.1:8000/playground/) ![playground.png](playground.png)