This is a message to announce that a new set of web pages have been added to http://nmr-relax.com. Using the program Epydoc (http://epydoc.sourceforge.net/) I have created API documentation for relax (using r1407 of the SVN repository path https://svn.sourceforge.net/svnroot/epydoc/trunk/epydoc). The API documentation can be found at http://nmr-relax.com/api/index.html. This documentation should be a useful reference for relax developers and a document that power users can use to create advanced scripts. It can also be used by developers who would like to use functions and other elements of relax within their programs. To import relax modules the relax base directory needs to be part of the PYTHONPATH environmental variable. The API documentation tells you what to expect when importing the various relax modules into your Python program. For using the relax modules within C programs, see the 'Extending and Embedding the Python Interpreter' document located at http://docs.python.org/ext/ext.html. Significant improvements could be made to this documentation by making sure that all functions have docstrings and that these docstrings are properly formatted and fully describe what the function does. For relax functions (excluding the user functions) elements of the 'epytext' language (http://epydoc.sourceforge.net/epytextintro.html and http://epydoc.sourceforge.net/epytext.html) could be added to the docstrings with hardly any formatting changes. This would significantly improve the API documentation. It was Andrew Perry who had the idea of the automatically generated API documentation. I have only now implemented it because previous programs I had tested tended to mangle the Python docstrings. The Epydoc program solves this by using a fixed width font - hence the equations from the docstrings are now legible in the web pages. Edward