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.”

DetectSentiment - Amazon Comprehend API Reference

DetectSentiment

Inspects text and returns an inference of the prevailing sentiment (POSITIVE, NEUTRAL, MIXED, or NEGATIVE).

Request Syntax

{ "LanguageCode": "string", "Text": "string" }

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

The request accepts the following data in JSON format.

LanguageCode

The language of the input documents. You can specify any of the primary languages supported by Amazon Comprehend. All documents must be in the same language.

Type: String

Valid Values: en | es | fr | de | it | pt | ar | hi | ja | ko | zh | zh-TW

Required: Yes

Text

A UTF-8 text string. The maximum string size is 5 KB.

Type: String

Length Constraints: Minimum length of 1.

Required: Yes

Response Syntax

{ "Sentiment": "string", "SentimentScore": { "Mixed": number, "Negative": number, "Neutral": number, "Positive": number } }

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

Sentiment

The inferred sentiment that Amazon Comprehend has the highest level of confidence in.

Type: String

Valid Values: POSITIVE | NEGATIVE | NEUTRAL | MIXED

SentimentScore

An object that lists the sentiments, and their corresponding confidence levels.

Type: SentimentScore object

Errors

For information about the errors that are common to all actions, see Common Errors.

InternalServerException

An internal server error occurred. Retry your request.

HTTP Status Code: 500

InvalidRequestException

The request is invalid.

HTTP Status Code: 400

TextSizeLimitExceededException

The size of the input text exceeds the limit. Use a smaller document.

HTTP Status Code: 400

UnsupportedLanguageException

Amazon Comprehend can't process the language of the input text. For a list of supported languages, Supported languages in the Comprehend Developer Guide.

HTTP Status Code: 400

Examples

Detect sentiment

If the input text is "Today is my birthday, I am so happy.", the operation returns the following response:

{ "SentimentScore": { "Mixed": 0.0033542951568961143, "Positive": 0.9869875907897949, "Neutral": 0.008563132025301456, "Negative": 0.0010949420975521207 }, "Sentiment": "POSITIVE", } }

See Also

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

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