CreateWebFunction
Creates a web function with an initial revision and endpoint. To create a web function, you provide the function name, revision configuration (code and service settings), and endpoint configuration.
To use this operation, you must have the CreateWebFunction permission on the web function. You don't need separate permissions for the initial revision or endpoint.
Request Syntax
PUT /2025-03-07/web-functions HTTP/1.1
Content-type: application/json
{
"endpointConfig": {
"authType": "string",
"autoDeploymentMode": "string",
"description": "string",
"endpointName": "string",
"endpointType": "string",
"regions": [ "string" ],
"scalingConfig": {
"maxEnvironments": number
},
"throttleConfig": {
"rateLimit": number
}
},
"functionName": "string",
"revisionConfig": {
"buildConfig": {
"codeConfig": {
"s3Object": {
"bucket": "string",
"key": "string",
"versionId": "string"
}
},
"runtimeConfig": {
"runtime": "string"
}
},
"description": "string",
"kmsKeyArn": "string",
"serviceConfig": {
"egressNetworkConnectorArn": "string",
"environmentVariables": {
"string" : "string"
},
"executionRoleArn": "string",
"maxConcurrencyPerEnvironment": number,
"telemetryConfig": {
"loggingConfig": {
"applicationLogLevel": "string",
"logGroup": "string",
"systemLogLevel": "string"
}
},
"timeoutSeconds": number
}
},
"tags": {
"string" : "string"
}
}URI Request Parameters
The request does not use any URI parameters.
Request Body
The request accepts the following data in JSON format.
- endpointConfig
-
The configuration for the initial endpoint of the web function.
Type: EndpointConfig object
Required: No
- functionName
-
The name of the web function. The name can contain letters, numbers, hyphens (-), and underscores (_), and can't begin or end with a hyphen or an underscore. The name is limited to 64 characters in length.
Type: String
Length Constraints: Minimum length of 1. Maximum length of 256.
Required: Yes
- revisionConfig
-
The configuration for the initial revision of the web function, including code and service settings.
Type: RevisionConfig object
Required: No
-
A map of tag keys and values to apply to the web function.
Type: String to string map
Map Entries: Minimum number of 0 items. Maximum number of 200 items.
Key Length Constraints: Minimum length of 1. Maximum length of 128.
Key Pattern:
[a-zA-Z0-9 _\.:/=+\-@]+Value Length Constraints: Minimum length of 0. Maximum length of 256.
Value Pattern:
[a-zA-Z0-9 _\.:/=+\-@]*Required: No
Response Syntax
HTTP/1.1 202
Content-type: application/json
{
"createdAt": "string",
"endpoint": {
"authType": "string",
"autoDeploymentMode": "string",
"createdAt": "string",
"description": "string",
"domainName": "string",
"endpointArn": "string",
"endpointName": "string",
"endpointType": "string",
"regions": [ "string" ],
"revisionWeights": [
{
"revisionId": "string",
"weight": number
}
],
"scalingConfig": {
"maxEnvironments": number
},
"state": "string",
"stateReason": "string",
"throttleConfig": {
"rateLimit": number
},
"updatedAt": "string",
"updateStatus": "string",
"updateStatusReason": "string"
},
"functionArn": "string",
"functionName": "string",
"revision": {
"createdAt": "string",
"description": "string",
"revisionArn": "string",
"revisionId": "string",
"state": "string",
"stateReason": "string"
},
"state": "string",
"stateReason": "string",
"tags": {
"string" : "string"
},
"updatedAt": "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.
- createdAt
-
The date and time the web function was created.
Type: Timestamp
- endpoint
-
A summary of the initial endpoint created with the web function.
Type: FunctionEndpointSummary object
- functionArn
-
The Amazon Resource Name (ARN) of the web function.
Type: String
Length Constraints: Minimum length of 1. Maximum length of 2048.
- functionName
-
The name of the web function.
Type: String
Length Constraints: Minimum length of 1. Maximum length of 256.
- revision
-
A summary of the initial revision created with the web function.
Type: FunctionRevisionSummary object
- state
-
The current state of the web function.
Type: String
Valid Values:
Pending | Active | Failed | Deleting - stateReason
-
The reason for the current state of the web function.
Type: String
-
A map of tag keys and values associated with the web function.
Type: String to string map
Map Entries: Minimum number of 0 items. Maximum number of 200 items.
Key Length Constraints: Minimum length of 1. Maximum length of 128.
Key Pattern:
[a-zA-Z0-9 _\.:/=+\-@]+Value Length Constraints: Minimum length of 0. Maximum length of 256.
Value Pattern:
[a-zA-Z0-9 _\.:/=+\-@]* - updatedAt
-
The date and time the web function was last updated.
Type: Timestamp
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
See Also
For more information about using this API in one of the language-specific AWS SDKs, see the following:
