> For the complete documentation index, see [llms.txt](https://docs.multiset.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.multiset.ai/web-sdk/webxr-sdk/api-reference/multisetclient.md).

# MultisetClient

HTTP client for authentication, localization, and object tracking requests

```typescript
import { MultisetClient } from '@multisetai/vps/core';
```

Handles all communication with the Multiset API. Has no rendering or WebXR dependencies.

### Constructor

```typescript
new MultisetClient(config: IMultisetClientConfig)
```

Config is a discriminated union based on `mapType`.

#### VPS Config (`mapType: 'map'` or `'map-set'`)

| Parameter                 | Type                             | Required | Description                                                                   |
| ------------------------- | -------------------------------- | -------- | ----------------------------------------------------------------------------- |
| `clientId`                | `string`                         | Yes      | From the Multiset Developer Portal                                            |
| `clientSecret`            | `string`                         | Yes      | From the Multiset Developer Portal                                            |
| `mapType`                 | `'map' \| 'map-set'`             | Yes      | Single map or map set                                                         |
| `code`                    | `string`                         | Yes      | Map code or map set code                                                      |
| `isRightHanded`           | `boolean`                        | No       | Default `true`. Set `false` if consuming coordinates in a left-handed system. |
| `convertToGeoCoordinates` | `boolean`                        | No       | Return lat/lon/alt in the response. Map must be georeferenced.                |
| `hintPosition`            | `string`                         | No       | Local-space hint as `"x,y,z"`                                                 |
| `hintRadius`              | `number \| string`               | No       | Search radius in metres (5 to 100)                                            |
| `hintMapCodes`            | `string[]`                       | No       | Restrict search to these maps within a map set                                |
| `passGeoPose`             | `boolean`                        | No       | Send device GPS coordinates with each request                                 |
| `use2DFiltering`          | `boolean`                        | No       | Ignore altitude in geo filtering. Requires `passGeoPose: true`.               |
| `endpoints`               | `Partial<IMultisetSdkEndpoints>` | No       | Override default API endpoints                                                |

#### Object Tracking Config (`mapType: 'object-tracking'`)

| Parameter       | Type                             | Required | Description                        |
| --------------- | -------------------------------- | -------- | ---------------------------------- |
| `clientId`      | `string`                         | Yes      | From the Multiset Developer Portal |
| `clientSecret`  | `string`                         | Yes      | From the Multiset Developer Portal |
| `mapType`       | `'object-tracking'`              | Yes      |                                    |
| `code`          | `string[]`                       | Yes      | Array of object codes (1 to 10)    |
| `isRightHanded` | `boolean`                        | No       | Default `true`                     |
| `endpoints`     | `Partial<IMultisetSdkEndpoints>` | No       | Override default API endpoints     |

### Methods

| Method                                           | Returns                                    | Description                                                                       |
| ------------------------------------------------ | ------------------------------------------ | --------------------------------------------------------------------------------- |
| `authorize()`                                    | `Promise<string>`                          | Authenticate and store access token. Must be called before any other method.      |
| `localizeWithFrame(frame, intrinsics, options?)` | `Promise<ILocalizeAndMapDetails \| null>`  | Submit a captured frame for VPS localization. Returns `null` if no pose is found. |
| `trackObject(frame, intrinsics)`                 | `Promise<IObjectTrackingResponse \| null>` | Submit a frame for object detection. Returns `null` if no object is detected.     |
| `downloadObjectMesh(objectCode)`                 | `Promise<string \| null>`                  | Fetch a signed download URL for an object's 3D mesh.                              |
| `fetchMapDetails(mapCode)`                       | `Promise<IGetMapsDetailsResponse \| null>` | Fetch map metadata. Result is cached after the first call.                        |

### Properties

| Property      | Type             | Description                                                              |
| ------------- | ---------------- | ------------------------------------------------------------------------ |
| `token`       | `string \| null` | Access token after `authorize()`. `null` before authorization.           |
| `mapType`     | `string`         | The `mapType` from config                                                |
| `objectCodes` | `string[]`       | Object codes from config. Empty unless `mapType` is `'object-tracking'`. |

### Custom Endpoints

Override individual endpoints for on-premises deployments:

```typescript
const client = new MultisetClient({
  clientId: '...',
  clientSecret: '...',
  mapType: 'map',
  code: '...',
  endpoints: {
    authUrl: 'https://my-server.example.com/v1/m2m/token',
    queryUrl: 'https://my-server.example.com/v1/vps/map/query-form',
  },
});
```


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