Request Syntax URI Request Parameters Request Body Response Syntax Response Elements Errors See Also

UpdateWebFunctionEndpoint

Updates the configuration of a web function endpoint. You can modify the authorization type, auto-deployment mode, revision weights, scaling, and throttling settings.

Request Syntax


PATCH /2025-03-07/web-functions/functionName/endpoints/endpointName HTTP/1.1
Content-type: application/json

{
   "authType": "string",
   "autoDeploymentMode": "string",
   "description": "string",
   "revisionWeights": [ 
      { 
         "revisionId": "string",
         "weight": number
      }
   ],
   "scalingConfig": { 
      "maxEnvironments": number
   },
   "throttleConfig": { 
      "rateLimit": number
   }
}

URI Request Parameters

The request uses the following URI parameters.

endpointName

The endpoint to update.

You can specify either of the following:

The endpoint name, for example my-endpoint.
The endpoint ARN.

The length constraint applies only to the full ARN. If you specify only the endpoint name, it is limited to 64 characters in length.

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

Required: Yes

functionName

The web function.

You can specify either of the following:

The function name, for example my-function.
The function ARN.

The length constraint applies only to the full ARN. If you specify only the function name, it is limited to 64 characters in length.

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

Required: Yes

Request Body

The request accepts the following data in JSON format.

authType

The authorization type for the endpoint. Omit this field to keep the current authorization type.

Valid values:

ApplicationManaged – Your application handles authorization.
IamAuth – Lambda uses IAM to authorize requests, which must be signed with Signature Version 4 (SigV4).

Type: String

Valid Values: ApplicationManaged | IamAuth

Required: No

autoDeploymentMode

The auto-deployment mode for the endpoint. Omit this field to keep the current auto-deployment mode.

Valid values:

LatestRevision – The endpoint automatically serves the newest revision.
Disabled – Revision routing stays fixed until you change it.

Type: String

Valid Values: LatestRevision | Disabled

Required: No

description

A description of the endpoint. Omit this field to keep the current description.

Type: String

Length Constraints: Minimum length of 0. Maximum length of 256.

Required: No

revisionWeights

A list of revision weights that determine how traffic is distributed across revisions.

Type: Array of RevisionWeight objects

Array Members: Minimum number of 1 item. Maximum number of 2 items.

Required: No

scalingConfig

The scaling configuration for the endpoint. Omit this field to keep the current scaling configuration. To clear a previously set maxEnvironments value, specify an empty object.

Type: ScalingConfig object

Required: No

throttleConfig

The throttling configuration for the endpoint. Omit this field to keep the current throttling configuration. To clear a previously set rateLimit value, specify an empty object.

Type: ThrottleConfig object

Required: No

Response Syntax


HTTP/1.1 202
Content-type: application/json

{
   "authType": "string",
   "autoDeploymentMode": "string",
   "createdAt": "string",
   "description": "string",
   "domainName": "string",
   "endpointArn": "string",
   "endpointName": "string",
   "endpointType": "string",
   "functionArn": "string",
   "regionalEndpoints": { 
      "string" : { 
         "authType": "string",
         "domainName": "string",
         "revisionWeights": [ 
            { 
               "revisionId": "string",
               "weight": number
            }
         ],
         "scalingConfig": { 
            "maxEnvironments": number
         },
         "state": "string",
         "stateReason": "string",
         "throttleConfig": { 
            "rateLimit": number
         },
         "updateStatus": "string",
         "updateStatusReason": "string"
      }
   },
   "regions": [ "string" ],
   "revisionWeights": [ 
      { 
         "revisionId": "string",
         "weight": number
      }
   ],
   "scalingConfig": { 
      "maxEnvironments": number
   },
   "state": "string",
   "stateReason": "string",
   "throttleConfig": { 
      "rateLimit": number
   },
   "updatedAt": "string",
   "updateStatus": "string",
   "updateStatusReason": "string"
}

Response Elements

If the action is successful, the service sends back an HTTP 202 response.

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

authType

The authorization type for a web function endpoint.

Valid values:

ApplicationManaged – Your application handles authorization.
IamAuth – Lambda uses IAM to authorize requests, which must be signed with Signature Version 4 (SigV4).

Type: String

Valid Values: ApplicationManaged | IamAuth

autoDeploymentMode

The auto-deployment mode for a web function endpoint.

Valid values:

LatestRevision – The endpoint automatically serves the newest revision.
Disabled – Revision routing stays fixed until you change it.

Type: String

Valid Values: LatestRevision | Disabled

createdAt

The date and time the endpoint was created.

Type: Timestamp

description

The description of the endpoint.

Type: String

Length Constraints: Minimum length of 0. Maximum length of 256.

domainName

The domain name assigned to the endpoint.

Type: String

Length Constraints: Minimum length of 4. Maximum length of 256.

Pattern: ([a-z0-9-]+\.)+[a-z]+

endpointArn

The Amazon Resource Name (ARN) of the endpoint.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 2048.

endpointName

The name of the endpoint.

Type: String

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

endpointType

The type of a web function endpoint.

Valid values:

HomeRegion – Serves traffic from the Region where you created the web function.
MultiRegion – Replicates across the Regions that you choose and routes each request to the nearest one.
PerRegion – Creates a separate endpoint in each Region that you choose.

Type: String

Valid Values: HomeRegion | MultiRegion | PerRegion

functionArn

The Amazon Resource Name (ARN) of the web function.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 2048.

regionalEndpoints

The list of regional endpoint configurations.

Type: String to RegionalEndpoint object map

Key Length Constraints: Minimum length of 1. Maximum length of 50.

Key Pattern: ([a-z]{2,}-){2,}[0-9]

regions

The Regions configured for the endpoint.

Type: Array of strings

Array Members: Minimum number of 1 item. Maximum number of 100 items.

Length Constraints: Minimum length of 1. Maximum length of 50.

Pattern: ([a-z]{2,}-){2,}[0-9]

revisionWeights

The traffic distribution across revisions for the endpoint. Each entry maps a revision to a weight from 1 to 100.

Type: Array of RevisionWeight objects

Array Members: Minimum number of 1 item. Maximum number of 2 items.

scalingConfig

The scaling configuration for a web function endpoint.

Type: ScalingConfig object

state

The current state of the endpoint.

Type: String

Valid Values: Pending | Active | Failed | Deleting

stateReason

The reason for the current state of the endpoint.

Type: String

throttleConfig

The throttling configuration for a web function endpoint.

Type: ThrottleConfig object

updatedAt

The date and time the endpoint was last updated.

Type: Timestamp

updateStatus

The status of the most recent update to an endpoint. Possible values:

InProgress – The update is in progress.
Successful – The update completed successfully.
Failed – The update failed.

Type: String

Valid Values: InProgress | Successful | Failed

updateStatusReason

The reason for the endpoint's most recent update status.

Type: String

Errors

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

AccessDeniedException

You don't have permission to perform this operation. Check the IAM policies for your identity and any resource-based policy on the web function.

message: A message describing the access denied error.

HTTP Status Code: 403

ConflictException

The request conflicts with the current state of the resource. For example, the resource is being modified by another request, you tried to delete a revision that is serving traffic on an endpoint, or the policy revision ID that you specified doesn't match the current policy. Resolve the conflict and try again.

message: A message describing the conflict.
resourceId: The identifier of the resource in conflict.
resourceType: The type of the resource in conflict.

HTTP Status Code: 409

InternalServerException

The request failed because of an internal error in the service. Retry the request. If the error persists, open a support case.

message: A message describing the internal error.

HTTP Status Code: 500

ResourceNotFoundException

The specified web function, revision, endpoint, or resource-based policy doesn't exist. Verify the resource identifier and try again.

message: A message describing the resource not found error.
resourceId: The identifier of the resource that was not found.
resourceType: The type of the resource that was not found.

HTTP Status Code: 404

ServiceQuotaExceededException

The request would exceed a service quota, such as the maximum number of web functions in your account or the maximum number of revisions or endpoints per web function. Request a quota increase or reduce usage and try again.

message: A message describing the quota that was exceeded.
quotaCode: The quota code of the exceeded quota.
resourceId: The identifier of the resource that exceeded the quota.
resourceType: The type of resource that exceeded the quota.
serviceCode: The service code of the service that owns the quota.

HTTP Status Code: 402

ThrottlingException

The request was denied because it exceeded the request rate that Lambda allows for your account. Reduce the frequency of requests and retry with exponential backoff.

message: A message describing the throttling error.
quotaCode: The quota code that was exceeded, if applicable.
retryAfterSeconds: The number of seconds to wait before retrying the request.
serviceCode: The service code of the throttled service.

HTTP Status Code: 429

ValidationException

The request failed validation because a parameter was missing, malformed, or outside the allowed range. Check the request parameters and try again.

message: A message describing the validation error.

HTTP Status Code: 400