Permissions by OA.Works
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Know everything needed to legally self-archive a paper in seconds

We handcraft publisher & institutional policies and laws that affect self-archiving in institutional repositories, check them daily, and cross-reference them with manuscript metadata. For 85+% of papers our free and open tools can tell you which versions can be shared, on exactly what date, under what license and deposit statement.

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Built in partnership with librarians and:

For Developers

Use our lightning fast, simple API. Just send us a DOI, journal, publisher, or affiliation you want checked. No signup required.

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For Librarians

Check one DOI, or thousands at a time with our spreadsheet. Just copy and paste your DOIs and get detailed information into the heart of your workflows.

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For Authors

Just deposit your paper with us and let us worry about the details of how it will be shared.


For Publishers

Writing a good self-archiving policy is hard, but we can help make it easy.

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Supported by leaders at

How it works

Our goal is to answer the question: “How can this paper be self-archived in an institutional repository?”.

After years of doing permissions checking by hand, we know that three things are needed. First, knowledge about a specific paper, e.g., where and when was it published. Second, a visit to Sherpa/Romeo to discover and understand the relevant policies, for example, the publisher’s self-archiving policy. And third, time to find this information, double check the policies, and figure out exact embargos and deposit statements, among other things.

With permissions we aim to automating permissions checking without cutting corners and provide a simple but complete answer to the question. However, the approach is the same.

Our first step is to we track down paper metadata from Crossref, Unpaywall, and Microsoft Academic. This can tell us when and where the paper was published, whether it was OA, and what its license. We can also often identify author affiliations and the source of funding for a paper.

Second, we use those details to find relevant policies in our database. We handcrafted the database from the ground up from the content of relevant policy documents. The database includes publisher self-archiving policies, of course, but it also includes institutional open access policies and laws where they affect self-archiving. All of this information was designed to be fully machine readable, is automatically monitored on a daily basis, and is archived when there is a revision. These features ensure that the database is up to date.

Then, we combine paper and policy information, to provide answers. This means we can find the exact embargo using the publication date and embargo length, complete the deposit statement using citation information, reveal whether a hybrid article can be archived, set the version based on an institutional policy or regulation, and more. If there are multiple ways to deposit an article, we try to choose the easiest for authors.

Each of our tools is designed to provide the answers needed in an easy and fast way.

Experts actively maintain the code and data in the open, We accept contributions to both code and data. We plan to continuously add features and policies.

Free & Open

Our code and data are free and open to everyone so you can check them, reuse them, and build on them.

It's all here

Deposit statements
Required licenses
Embargo periods
Full-text policy links
Everything else you need

Checked daily, archived, and expertly curated

We check policies every day to ensure they’re up to date. If you contribute, we'll review your contribution within 24 hours. Everything is archived, so you're never left wondering.

More than publisher policies

We take into account institutional policies, variations in copyright, and open access. In short, we consider everything that might affect whether an article can be archived.

85+ percent of papers covered

And each day we work toward 100 percent. We cover every Open Access paper, 300 major publishers and their journals, and 100 institutional open access policies and copyright laws.

Not just policies, but answers

Give us a DOI and we'll customize permissions information with embargo dates and deposit statements relevant to each paper, and more--we factor in author affiliation, open access status, and other relevant considerations. We think of as "article level permissions."

For change, not for profit

We built Permissions as an experiment in building an open system that makes permissions checking simple, fast, and clear for authors and librarians.

It’s open, so anyone can use it, but we need your leadership to sustain it.


Free, Forever

Use the tools
  • Everything above.


Flexible pricing, flexible length.

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  • Heads up when policies change.
  • We'll run bulk jobs even the bulk checker can't.
  • Fast track addition of any required policies.
  • Priority support, input, training & set up.
  • Recognition of your leadership: Thanks on our sites.
  • Upgraded version of other Open Access Button tools.