Does Mantis provide a webservice interface?
See the MantisConnect project which provides a PHP webservice that can be used from any language that supports SOAP webservices. MantisConnect also includes client libraries for .NET, Java and Cocoa. MantisConnect also includes sample applications that uses the provided client libraries to provide useful tools. This includes an Eclipse plug-in written in Java, a NAnt task to submit Mantis issues written in .NET, and many others. MantisConnect now comes as part of the standard Mantis installation package and can be found under the ‘{$mantis_install_dir}/api/soap’ directory. To see what functionality is currently provided via MantisConnect, check the WSDL available here.