Abstract
There are various analytical programs, databases and bibliography in biology and they are often integrated and used. Therefore, we at National Institute of Genetics (NIG) developed Web APIs of over 120 functions and opened them to the public. As a result, users of NIG systems can combine several services as if the user has the large scale system. Furthermore, the know-how of the combination can be shared as a workflow. We introduce the application of Web API in biology.