## Evaluate flag

`client.flagship.apps.evaluate.get(stringappID, EvaluateGetParamsparams, RequestOptionsoptions?): EvaluateGetResponse`

**get** `/accounts/{account_id}/flagship/apps/{app_id}/evaluate`

Evaluates a flag against the provided context. Pass context attributes as query parameters; values are forwarded as strings. For low-latency in-Worker evaluation, prefer the Flagship binding over this endpoint.

### Parameters

- `appID: string`

  App identifier.

- `params: EvaluateGetParams`

  - `account_id: string`

    Path param: Cloudflare account ID.

  - `flagKey: string`

    Query param: The flag key to evaluate.

  - `targetingKey?: string`

    Query param: Context targeting key (per OpenFeature spec); used for percentage rollout bucketing.

### Returns

- `EvaluateGetResponse`

  - `flagKey: string`

  - `reason: "TARGETING_MATCH" | "DEFAULT" | "DISABLED" | "SPLIT"`

    - `"TARGETING_MATCH"`

    - `"DEFAULT"`

    - `"DISABLED"`

    - `"SPLIT"`

  - `variant: string`

  - `value?: string | null | number | boolean | 2 more`

    - `string | null`

    - `number`

    - `boolean`

    - `Record<string, unknown>`

    - `Array<unknown>`

### Example

```typescript
import Cloudflare from 'cloudflare';

const client = new Cloudflare({
  apiToken: process.env['CLOUDFLARE_API_TOKEN'], // This is the default and can be omitted
});

const evaluate = await client.flagship.apps.evaluate.get('app_id', {
  account_id: 'account_id',
  flagKey: 'flagKey',
});

console.log(evaluate.flagKey);
```

#### Response

```json
{
  "flagKey": "flagKey",
  "reason": "TARGETING_MATCH",
  "variant": "variant",
  "value": "string"
}
```