Can I use SOAP in my project?

HI
Please help me in knowing whether can I use SOAP in my projects.
is it allowed to use? shall I have to buy the toolkit or is it available free?
Is there any formalities shall I have to follow to use SOAP in my online project.
Please help me regarding this
Thainking you in advance
V.Pardha Saradhi

Sure! Jump right into the SOAP suds with me! (Java Developer's Guide to SOAP and XML messaging - maybe by December if all goes well)
The SOAP 2.2 version from the Apache organization is pretty stable and people are actually doing work with it. It is of course free and comes with source code and examples. Go to:
http://xml.apache.org
Although this version can use the Xerces XML parser, I recommend you go with the JAXP 1.1 package from SUN as it is likely to become a standard part of the Java release.
I am using SOAP with Tomcat 4.0 - but other folks are using it with JRun and other servers.
I am collecting resources at: http://www.lanw.com/books/javasoap/
and there are LOTS of other related web sites.
Bill