> ## Documentation Index
> Fetch the complete documentation index at: https://docs.stackone.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Connector YAML Reference

> YAML Schema reference for connector configurations

StackOne connectors are defined in YAML.The same schema powers every pre-built connector, and you can use it to build your own.

If you're new to connectors, start with [Build your first connector](/guides/connector-engine/building-first-connector) and [Connector structure](/connector-yaml-reference/file-structure).

<CardGroup cols={2}>
  <Card title="File structure" icon="folder-tree" href="/connector-yaml-reference/file-structure">
    How a connector's files are organized, from the main file to resource partials.
  </Card>

  <Card title="YAML Schema" icon="code" href="/connector-yaml-reference/yaml-schema/overview">
    Every top-level connector property: info, baseUrl, authentication, actions, events, and more.
  </Card>

  <Card title="Step Functions" icon="diagram-project" href="/connector-yaml-reference/step-functions/overview">
    The step functions you compose inside action and event setup steps.
  </Card>

  <Card title="Expression language" icon="brackets-curly" href="/connector-yaml-reference/expression-language">
    JSONPath, JEXL, and string interpolation used throughout the schema.
  </Card>
</CardGroup>


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.