Amazon Mechanical Turk Legacy API Reference - Amazon Mechanical Turk


You are browsing the documentation for a deprecated version ('2014-08-15') of the Amazon Mechanical Turk Requester API. This version of the API will be deprecated and will be rendered unusable as of June 1st, 2019.

If you request against a legacy API version ( on or after June 1, 2019, you will receive the following response:

This Requester API is no longer supported. Please use the latest API using the official AWS SDK.

The latest version of our API ('2017-01-17') provides you with additional tool choices and enables you to select from nine AWS Software Development Kits (SDKs) that have been widely adopted across the AWS community. This API can be accessed using the following AWS SDKs: Python/Boto (Boto3), Javascript (NodeJS or Browser), Java, .NET, Go, Ruby, PHP or C++. This version also makes it easier for customers to connect MTurk with other AWS services like S3, Lambda, Step Functions, Lex, Polly, Rekognition, Amazon SageMaker, AWS Batch, EC2, and more.

This version also updates naming conventions used in the API and adopts the AWS standard of Signature Version 4 to authenticate requests securely. The API uses REST requests and no longer requires that developers be familiar with SOAP protocol. These changes make the MTurk API consistent with AWS APIs, simplifying the on-boarding process for both new and existing AWS developers. The legacy MTurk Command Line Tools and .NET, Java, Ruby, and Perl SDKs were marked as deprecated in January 2018. We will be deprecating the legacy APIs as of June 1, 2019.

If you are on a legacy API, you must migrate to the latest version of our API. You can find documentation for the latest API here and the AWS SDKs here. Please check whether you need to migrate and review the technical migration guide.

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Amazon Mechanical Turk Legacy API Reference

This is the Amazon Mechanical Turk Legacy API Reference. This guide provides detailed information about old Amazon Mechanical Turk operations, data structures, and parameters. The major sections of this guide are described in the following table.

Check out the newest API reference Amazon Mechanical Turk Legacy API Reference

Amazon Mechanical Turk is a web service that provides an on-demand, scalable, human workforce to complete jobs that humans can do better than computers, for example, recognizing objects in photos. For more information about this product go to the Amazon Mechanical Turk website.


Alphabetical list of all Amazon Mechanical Turk operations.

Data Structures

Alphabetical list of all Amazon Mechanical Turk data structures.

Common Parameters

Descriptions of the parameters common to all operations.

WSDL and Schema Locations

Links to Amazon Mechanical Turk WSDL and schemas.

Review Policies

Description of Amazon Mechanical Turk Review Policies.

Question and Answer Data

Description of question and answer data that Amazon Mechanical Turk passes between Requesters and Workers.

The Notification API

Description of how Amazon Mechanical Turk sends notification messages to your application.