Select your cookie preferences

We use essential cookies and similar tools that are necessary to provide our site and services. We use performance cookies to collect anonymous statistics, so we can understand how customers use our site and make improvements. Essential cookies cannot be deactivated, but you can choose “Customize” or “Decline” to decline performance cookies.

If you agree, AWS and approved third parties will also use cookies to provide useful site features, remember your preferences, and display relevant content, including relevant advertising. To accept or decline all non-essential cookies, choose “Accept” or “Decline.” To make more detailed choices, choose “Customize.”

Preferences
Contact Us
Feedback
AWS Documentation
Create an AWS Account

Amazon Lex V2 API Reference

PDF
Focus mode
Amazon Lex V2 API Reference - Amazon Lex API Reference

This document provides detailed information about the Amazon Lex V2 API actions and their parameters.

For information about the IAM access control permissions you need to use this API, see Identity-based policies for Amazon Lex.

If you use a custom HTTP client to call Amazon Lex Model Building V2 operations, you must set the "Content-Type" HTTP header to "application/x-amz-json-1.1". Otherwise, you receive an HTTP 404 - UnknownOperationException in the response.

Amazon Lex Model Building V2 operations return the responses with the "application/x-amz-json-1.1" content type.

You can use AWS SDKs to access Amazon Lex V2 APIs using your favorite programming language. The SDKs automatically perform useful tasks for you, such as:

  • Cryptographically sign your service requests

  • Retry requests

  • Handle error responses

The following resources provide additional information about the Amazon Lex V2 API.

Topics
PrivacySite termsCookie preferences
© 2025, Amazon Web Services, Inc. or its affiliates. All rights reserved.