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

# Users and contacts

> Look up users, avatars, and manage instance contacts

Use `client.users()` and `client.contacts()` to look up WhatsApp profiles and manage instance contacts.

For instances, see [Instances and billing](/en/sdk/java/instances-and-billing).

## Contacts

### `client.contacts().list(instanceId, options)`

```java theme={null}
var options = InstanceRequestOptions.builder().instanceToken("instance-token").build();
JsonNode contacts = client.contacts().list("VZ...", options);
```

**Return:** envelope `{ code, success, data }` with contact array (`jid`, `Name`, `IsInWhatsapp`, etc.).

### `client.contacts().add(request)`

```java theme={null}
JsonNode added = client.contacts().add(
    GenericInstanceRequest.builder()
        .instanceId("VZ...")
        .instanceToken("instance-token")
        .build());
```

**Return:** envelope `{ code, success, data }` with confirmation text (e.g. `"Contact added"`).

Pass `phone`, `firstName`, and `fullName` in the request body or equivalent DTO.

## Users

### `client.users().info(request)`

```java theme={null}
JsonNode info = client.users().info(
    GenericInstanceRequest.builder()
        .instanceId("VZ...")
        .instanceToken("instance-token")
        .build());
```

**Return:** envelope `{ code, success, data }` with user profile fields (`VerifiedName`, `Status`, `PictureId`, etc.).

### `client.users().check(request)`

```java theme={null}
JsonNode exists = client.users().check(request);
```

**Return:** envelope `{ code, success, data.users[] }` with `phone`, `exists`, `jid` per checked number.

### `client.users().avatar(request)`

```java theme={null}
JsonNode avatar = client.users().avatar(request);
```

**Return:** envelope `{ code, success, data }` with avatar `base64` and `mimetype`.

### `client.users().contacts(instanceId, options)`

```java theme={null}
JsonNode contacts = client.users().contacts("VZ...", options);
```

**Return:** envelope `{ code, success, data }` — JID map to contact fields (`FirstName`, `FullName`, `PushName`, etc.).