> You are reading the Docusign Developer Documentation. For clean Markdown of any page, append .md to the page URL.
>
> Documentation indexes by section:
> - APIs and SDKs: https://docusign.docs.buildwithfern.com/docs/llms.txt
> - Platform 101: https://docusign.docs.buildwithfern.com/platform/llms.txt
> - Extension Apps: https://docusign.docs.buildwithfern.com/extension-apps/llms.txt
> - Docusign CLI: https://docusign.docs.buildwithfern.com/docusign-cli/llms.txt
>
> Authentication (OAuth, JWT Grant, M2M): https://docusign.docs.buildwithfern.com/platform/auth
> Webhooks and Connect: https://docusign.docs.buildwithfern.com/platform/webhooks
>
> OpenAPI specifications: https://docusign.docs.buildwithfern.com/openapi.json
> MCP server: https://docusign.docs.buildwithfern.com/_mcp/server

# Set up your IT infrastructure

> Learn about setup information for the types of services to which extension apps will send requests.

These topics contain setup information for the types of services to which extension apps will send requests.

* [API proxy](/extension-apps/build-an-extension-app/it-infrastructure/api-proxy): Describes a service that transforms an extension app’s requests and an API service’s responses to the required format.
* [Authorization](/extension-apps/build-an-extension-app/it-infrastructure/authorization): Explains how an extension app obtains permission to access API resources and outlines setup changes that may be needed in an API service or identity provider to allow authorization.
* [Network configuration](/extension-apps/build-an-extension-app/it-infrastructure/network-configuration): Describes firewall and ad blocker configuration that may be required on your platform so that Docusign can communicate with it.

## Next steps

* Get an overview of the process to [build an extension app](/extension-apps/build-an-extension-app).
* Find out [how extension apps work](/extension-apps/extension-apps-101/how-extension-apps-work).
* Learn how to [troubleshoot errors](/extension-apps/troubleshooting).

> Learn about setup information for the types of services to which extension apps will send requests.

## Docs

- [API proxy](https://developers.docusign.com/extension-apps/build-an-extension-app/it-infrastructure/api-proxy.md): Get an overview of a component that serves as an intermediary between a Docusign extension app and the third-party API service to which it sends requests.
- [Authorization](https://developers.docusign.com/extension-apps/build-an-extension-app/it-infrastructure/authorization.md): Get an overview of the process by which an extension app obtains authorization to access resources in a third-party service.
- [Network configuration](https://developers.docusign.com/extension-apps/build-an-extension-app/it-infrastructure/network-configuration.md): Learn about network setup required to ensure that Docusign can communicate successfully with your platform.