# Authentication Servers

> Let several DS Server instances accept each other's access tokens: register authentication servers in the admin portal, with the Web API or the Admin package.

- **Product:** DS Server
- **Section:** Documentation
- **Kind:** Topic
- **Path:** DS Server > Administration and Settings > Authentication Servers
- **Web URL:** https://docs.textcontrol.com/ds-server/administration/authentication-servers/
- **LLMs URL:** https://docs.textcontrol.com/ds-server/administration/authentication-servers/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/ds-server/administration/authentication-servers/llms-full.txt

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## On This Page

- [How It Works](https://docs.textcontrol.com/ds-server/administration/authentication-servers/#how-it-works)
- [Plan the Setup](https://docs.textcontrol.com/ds-server/administration/authentication-servers/#plan-the-setup)
- [Register an Authentication Server in the Portal](https://docs.textcontrol.com/ds-server/administration/authentication-servers/#register-an-authentication-server-in-the-portal)
- [Register an Authentication Server With the Web API](https://docs.textcontrol.com/ds-server/administration/authentication-servers/#register-an-authentication-server-with-the-web-api)
- [Register an Authentication Server With the Admin Package](https://docs.textcontrol.com/ds-server/administration/authentication-servers/#register-an-authentication-server-with-the-admin-package)
- [The Endpoints for Tokens](https://docs.textcontrol.com/ds-server/administration/authentication-servers/#the-endpoints-for-tokens)
- [Next Steps](https://docs.textcontrol.com/ds-server/administration/authentication-servers/#next-steps)

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## Nearby

- **Previous:** [OAuth Grant Types](https://docs.textcontrol.com/ds-server/administration/oauth-grant-types/llms.txt)
- **Next:** [Client-Side Libraries](https://docs.textcontrol.com/ds-server/client-libraries/llms.txt)