AWS Lambda
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This API is deprecated. We recommend you use Invoke API (see Invoke).

Submits an invocation request to AWS Lambda. Upon receiving the request, Lambda executes the specified function asynchronously. To see the logs generated by the Lambda function execution, see the CloudWatch Logs console.

This operation requires permission for the lambda:InvokeFunction action.

Request Syntax

POST /2014-11-13/functions/FunctionName/invoke-async/ HTTP/1.1


URI Request Parameters

The request requires the following URI parameters.


The Lambda function name. Note that the length constraint applies only to the 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 170.

Pattern: (arn:aws:lambda:)?([a-z]{2}-[a-z]+-\d{1}:)?(\d{12}:)?(function:)?([a-zA-Z0-9-_\.]+)(:(\$LATEST|[a-zA-Z0-9-_]+))?

Request Body

The request accepts the following binary data.


JSON that you want to provide to your Lambda function as input.

Response Syntax

HTTP/1.1 Status

Response Elements

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


It will be 202 upon success.



The request body could not be parsed as JSON.

HTTP Status Code: 400


The runtime or runtime version specified is not supported.

HTTP Status Code: 502


The resource (for example, a Lambda function or access policy statement) specified in the request does not exist.

HTTP Status Code: 404


The AWS Lambda service encountered an internal error.

HTTP Status Code: 500


Invoke a Lambda function

The following example uses a POST request to invoke a Lambda function.

Sample Request

POST /2014-11-13/functions/helloworld/invoke-async/ HTTP/1.1
[input json]

Sample Response

HTTP/1.1 202 Accepted
x-amzn-requestid: f037bc5c-5a08-11e4-b02e-af446c3f9d0d
content-length: 0
connection: keep-alive
date: Wed, 22 Oct 2014 16:31:55 GMT
content-type: application/json

See Also

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