As part of Open Access Week, Impactstory has introduced a new tool for researchers to measure their Open Access Score. The resulting number indicates the percentage of your work that is free to read online.
All you need is a Twitter account and one of your papers in an Open Access repository, for instance UvA-DARE. Detailed instructions are available on Impactstory's blog.
Impactstory is an open-source website that helps researchers explore and share the online impact of their research. It provides insight in where publications are being cited, shared and saved.