can you advise the API for use in my project on the following criteria:
2. Russian Language
3. Paid or free version - it does not matter
Looked at a large number of API, but could not find satisfying all the criteria listed above.
You can use Alachemy API,
Providing link below:
Alchemy Api SDK has test classes as well for understanding purpose.
At SemanticAnalyzer we have exactly what you need: sentiment analysis of a text in Russian. Shipped both as a library and an API. Supports both Java and C# (library) and any language (API):
API on mashape: