Searches and retrieves scholarly metadata from the CrossRef REST API, covering over 150 million records across all disciplines, without requiring an API key.
Provides MCP tools to check reference lists for retracted or problematic citations, retrieve nuanced editorial statuses with evidence, and monitor institutions for newly flagged papers using open data from OpenAlex, Retraction Watch, and Crossref.
Checks whether a citation has been retracted, corrected, or flagged with an expression of concern by querying Crossref — including retractions that Crossref backfills from the Retraction Watch database, which publishers often never record in their own metadata. Lets an AI agent verify a DOI, or every DOI in a reference list, before using it in research or writing.
Enables searching and retrieving scholarly metadata from Crossref's public REST API, including works, journals, funders, and members, without requiring an API key.
Enables users to search scientific literature metadata across OpenAlex, Europe PMC, and Crossref, verify citations, retractions, source quotes, and claims, and build or export hash-chained evidence ledgers with explicit provenance and limitations.