Are there any research databases that accept submission of published articles? My organisation is a research institute that publishes peer-reviewed research articles via its website. Further social media and digital communication channels are also utilised to extend the reach of the published research, and the researchers are individually able to further promote their researchers via networks such as ResearchGate or Academia.edu.  In the latter case, these networks require the individual researcher to be authenticated, and so this cannot be done by my organisation on their behalf.  That is my assumption and the basis for the problem that I wish to address.

The question is: Are there any research databases that my organisation can submit research articles on behalf of the research authors? The fields covered are in the social sciences such as economics and geography, and the number of articles published is approaching 1,000.  The submission method could be manual or via an API or other indexing methodology.

So far, we have been unsuccessful in achieving indexing of the website content by Google Scholar (see related question).
Some possible leads are the Bielefeld Academic Search Engine, DataCite, and the Directory of Open Access Journals (DOAJ).  I would be interested in any feedback on the potential suitability of these options for our situation.

By research database, I am referring to search engine or index containing listings or full PDF content of published research articles.  The objective of this activity is to further extend the reach of the published research content to the wider community and also to the specific subject communities relevant to the research.
From Wikipedia:


  The Social Science Research Network (SSRN) is a website devoted to the rapid dissemination of scholarly research in the social sciences and humanities.


SSRN allows you to submit full text papers (for example preprints) and abstracts (for example of published and paywalled articles). Setting up an account is free and requires only an email address and password. I am not aware of any API for mass uploads.

In my experience, papers on SSRN are quickly indexed by Google Scholar.