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

# Introduction to Server APIs

> Particle Network's server APIs let you look up and verify Particle Auth users from your backend.

Particle Network also provides a small set of **server APIs** for backend integrations.\
These endpoints are useful when you need to **look up user details** or **verify whether a wallet belongs to a user in your project**.

* Retrieve user information by UUID and token
* Retrieve user information by identity
* Check whether an address belongs to a user in your project

<Note>These endpoints are intended for server-side usage and require your project server key.</Note>

This section gives you a quick overview of the currently available server endpoints, along with examples and an interactive playground for testing.

***

<CardGroup cols={3}>
  <Card title="getUserInfo" href="/social-logins/api/server/getuserinfo">
    Retrieve a registered user's information using their UUID and token.
  </Card>

  <Card title="getUserInfoByIdentity" href="/social-logins/api/server/getuserinfobyidentity">
    Retrieve a registered user's information using a supported identity value.
  </Card>

  <Card title="isProjectUser" href="/social-logins/api/server/isprojectuser">
    Check whether a wallet address belongs to a user associated with your project.
  </Card>
</CardGroup>