Natural Language Classifier

Interpret and classify natural language with confidence.

General Availability

The Natural Language Classifier service understands the intent behind text and returns a corresponding classification, complete with a confidence score. For example “What is the weather like today? or “Is it hot out?” or “Is it going to be nice today?” are all ways of asking about “temperature”. Use NLC to answer questions in a contact center, create chatbots, categorize volumes of written content and more.

How it works

Developer tools


First Classifier


First classifier is FREE. Each additional classifier is $20.00 per month.

Additional classifiers are charged for on a monthly basis.

API Calls


First one thousand API calls per month are FREE. Additional calls are $0.0035 per call.

You are charged only for the GET /classify and POST /classify methods.

Classifier Training Events


First four training events per month are FREE. Additional training events are $3.00 per training event.

Training events are tracked and charged for on a monthly basis.

More questions about pricing? Talk to sales

Ready to use?


Getting started is easy! Try out the service on Bluemix now.

Use In Bluemix


Ready to get down to the details? Full documentation detailing how to get started using this service in Bluemix is available for each Watson service.

View full docs


Localized versions of Watson services (Natural Language Classifier, Retrieve and Rank, Speech to Text, Text to Speech) are available in the following places.

Japanese - SoftBank