# Welcome
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Amazon Comprehend is an AWS service for gaining insight into the content of documents. Use these actions to determine the topics contained in your documents, the topics they discuss, the predominant sentiment expressed in them, the predominant language used, and more.

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

For information about the IAM access control permissions you need to use this API, see [Using IAM identity policies to manage permissions](https://docs.aws.amazon.com/comprehend/latest/dg/security_iam_id-based-policy-examples.html).

You can use [AWS SDKs](http://aws.amazon.com/tools/#sdk) to access Amazon Comprehend 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 Comprehend API.
+  *Amazon Web Services General Reference* 
  +  [Amazon Comprehend Endpoints for each region](https://docs.aws.amazon.com/general/latest/gr/comprehend.html).
+  * AWS Command Line Interface * 
  +  [ Amazon Comprehend CLI commands](https://docs.aws.amazon.com/cli/latest/reference/comprehend/index.html).

This document was last published on May 29, 2026.