ClaimGameServer - Amazon GameLift


This operation is used with the Amazon GameLift FleetIQ solution and game server groups.

Locates an available game server and temporarily reserves it to host gameplay and players. This operation is called from a game client or client service (such as a matchmaker) to request hosting resources for a new game session. In response, Amazon GameLift FleetIQ locates an available game server, places it in CLAIMED status for 60 seconds, and returns connection information that players can use to connect to the game server.

To claim a game server, identify a game server group. You can also specify a game server ID, although this approach bypasses Amazon GameLift FleetIQ placement optimization. Optionally, include game data to pass to the game server at the start of a game session, such as a game map or player information. Add filter options to further restrict how a game server is chosen, such as only allowing game servers on ACTIVE instances to be claimed.

When a game server is successfully claimed, connection information is returned. A claimed game server's utilization status remains AVAILABLE while the claim status is set to CLAIMED for up to 60 seconds. This time period gives the game server time to update its status to UTILIZED after players join. If the game server's status is not updated within 60 seconds, the game server reverts to unclaimed status and is available to be claimed by another request. The claim time period is a fixed value and is not configurable.

If you try to claim a specific game server, this request will fail in the following cases:

  • If the game server utilization status is UTILIZED.

  • If the game server claim status is CLAIMED.

  • If the game server is running on an instance in DRAINING status and the provided filter option does not allow placing on DRAINING instances.

Learn more

Amazon GameLift FleetIQ Guide

Request Syntax

{ "FilterOption": { "InstanceStatuses": [ "string" ] }, "GameServerData": "string", "GameServerGroupName": "string", "GameServerId": "string" }

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

The request accepts the following data in JSON format.


In the following list, the required parameters are described first.


A unique identifier for the game server group where the game server is running. If you are not specifying a game server to claim, this value identifies where you want Amazon GameLift FleetIQ to look for an available game server to claim.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 256.

Pattern: [a-zA-Z0-9-\.]+|^arn:.*:gameservergroup\/[a-zA-Z0-9-\.]+

Required: Yes


Object that restricts how a claimed game server is chosen.

Type: ClaimFilterOption object

Required: No


A set of custom game server properties, formatted as a single string value. This data is passed to a game client or service when it requests information on game servers.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 1024.

Pattern: .*\S.*

Required: No


A custom string that uniquely identifies the game server to claim. If this parameter is left empty, Amazon GameLift FleetIQ searches for an available game server in the specified game server group.

Type: String

Length Constraints: Minimum length of 3. Maximum length of 128.

Pattern: [a-zA-Z0-9-\.]+

Required: No

Response Syntax

{ "GameServer": { "ClaimStatus": "string", "ConnectionInfo": "string", "GameServerData": "string", "GameServerGroupArn": "string", "GameServerGroupName": "string", "GameServerId": "string", "InstanceId": "string", "LastClaimTime": number, "LastHealthCheckTime": number, "RegistrationTime": number, "UtilizationStatus": "string" } }

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.


Object that describes the newly claimed game server.

Type: GameServer object


For information about the errors that are common to all actions, see Common Errors.


The requested operation would cause a conflict with the current state of a service resource associated with the request. Resolve the conflict before retrying this request.

HTTP Status Code: 400


The service encountered an unrecoverable internal failure while processing the request. Clients can retry such requests immediately or after a waiting period.

HTTP Status Code: 500


One or more parameter values in the request are invalid. Correct the invalid parameter values before retrying.

HTTP Status Code: 400


The requested resources was not found. The resource was either not created yet or deleted.

HTTP Status Code: 400


The specified game server group has no available game servers to fulfill a ClaimGameServer request. Clients can retry such requests immediately or after a waiting period.

HTTP Status Code: 400


The client failed authentication. Clients should not retry such requests.

HTTP Status Code: 400


Reserve a game server for a new game session

This example reserves an available game server to host a new game session. Because the request does not specify a game server ID, Amazon GameLift selects an available game server with optimal placement.

HTTP requests are authenticated using an AWS Signature Version 4 signature in the Authorization header field.

Sample Request

{ "GameServerGroupName": "MegaFrogServers_NA" } CLI command: aws gamelift claim-game-server \ --game-server-group-name MegaFrogServers_NA

Sample Response

{ "GameServer": { "ClaimStatus": "CLAIMED", "ConnectionInfo": "", "GameServerData": "", "GameServerGroupArn": "arn:aws:gamelift:us-west-2::GameServerGroup/MegaFrogServers_NA", "GameServerGroupName": "MegaFrogServers_NA", "GameServerId": "mega-frog-game-12345678", "InstanceId": "i-1234567890abcdef0", "LastClaimTime": 1580218197.293, "LastHealthCheckTime": 1580218197.293, "RegistrationTime": 1580218197.293, "UtilizationStatus": "AVAILABLE" } }

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: