Pricing
Free for everyday use. Upgrade when you work through a lot of papers.
Free
$0
No card needed
- 300 library requests a month
- 20 PDF reads a month
- 25 items saved or changed a month
- Library check: how many problems it found
Pro
$5a month
$60 billed once a year, 7-day free trial
- 5,000 library requests a month
- 1,000 PDF reads a month
- 2,000 items saved or changed a month
- Library check: every retracted paper, duplicate and missing DOI, with the evidence
Get Pro
Sign in with the same account you use in Claude, so Pro unlocks there too.
- What counts?
- A library request is one search, item lookup, citation request, collection list or library check. A PDF read is one call that returns a PDF's text, up to 20 pages. Each item added, tagged, filed or given a note counts as one change. Checking your usage and connection never counts, and a request that fails isn't counted.
- What happens when I run out?
- Claude tells you which limit you reached. Counts reset on the first day of each month.
- What does Pro add to the library check?
- On Free the check tells you how many retracted papers, duplicates, missing DOIs and other problems it found. Pro lists each one with its evidence: the retraction notice and date, the duplicate pair, the DOI it found.
- Can I cancel?
- Yes, at any time. You keep Pro until the end of the period you paid for.