Know how your text lands.
Classify any text as positive, negative, or neutral — with a confidence score and full breakdown, in a single API call.
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What it does
One call. Three values. Enough signal to act.
Positive, negative, or neutral
Every text gets a dominant label plus a confidence score between 0.0 and 1.0, so you can threshold results with precision.
{
"sentiment": "positive",
"score": 0.97
}
Proportional scores across all classes
The breakdown shows how the model distributes confidence across all three classes — always summing to 1.0. Useful for ambiguous or mixed-tone text.
{
"breakdown": {
"positive": 0.97,
"negative": 0.01,
"neutral": 0.02
}
}
Built for real use cases
Anywhere text flows through your system, sentiment gives you signal.
Customer support
Route tickets automatically. Flag frustrated customers for priority handling before they churn.
Product reviews
Aggregate sentiment across thousands of reviews without reading them one by one.
Social media monitoring
Track brand mentions in real time and detect sentiment shifts before they become PR issues.
Content moderation
Pre-screen user-generated content for hostile or harmful tone before it reaches other users.
NLP pipelines
Use sentiment as a feature in ML models — preprocessing text classification, recommendation, or ranking tasks.
Survey analysis
Turn open-ended survey responses into structured sentiment data without manual tagging.
Pair it with other APIs
Sentiment works best as part of a pipeline. Here are three natural combinations.
Sentiment + Spell Check
Run spell check first to clean up noisy user input, then analyze sentiment on the corrected text for more accurate results.
Spell Check APISentiment + Language Detection
Detect the language before routing text to the right sentiment model. Useful for multilingual support queues and global review platforms.
Language Detection APISentiment + Email Validator
Validate the sender's email and analyze the tone of their message in one pass — before storing feedback or opening a support ticket.
Email Validator APIFrequently Asked Questions
Automate this with Requiems.
One API key. Sentiment analysis, plus 50+ other APIs across validation, finance, networking, and more.