Plugin

Patent by Ouroboros Apps

Early access

US patent search for inventors, founders, and researchers. It covers USPTO records only. Not legal advice, and not a substitute for a patent attorney.

Search and lookup use the USPTO Open Data Portal, and that works without an EPO key. EPO Open Patent Services is not turned on, so full claim-text search and EPO citation search are not available. The server says so in the tool result instead of inventing numbers. The older PatentsView citation graph is paused.

Server URL

https://patent-mcp.vercel.app/mcp

Connect

Claude: Customize, then Connectors, then Add custom connector. Paste the URL and sign in.
Cursor: add this to ~/.cursor/mcp.json or .cursor/mcp.json, then restart and sign in.
Grok: grok.com/connectors, New Connector, Custom, then the URL.

ChatGPT's directory doesn't list this yet. Use developer mode until it does. That's the early-access route.

{
  "mcpServers": {
    "patent": {
      "url": "https://patent-mcp.vercel.app/mcp"
    }
  }
}

Tools

These names and descriptions are what the server returns from tools/list before you sign in.

search_patents Search public patent records by keywords, claim language, CPC class, assignee, inventor, or grant date. Every number in the result was returned by USPTO or EPO. Not legal advice.
get_patent Fetch one patent's title, abstract, claims, status, family, and citations from USPTO and, when configured, EPO. Missing text is omitted rather than filled in. Not legal advice.
find_patent_citations List documents cited by a patent and documents that cite it, using USPTO grant references, USPTO office-action citations, and EPO citation search. This is not the full PatentsView citation graph, which is paused. Not legal advice.
search_prior_art Turn an idea description into a public-patent search and return the closest records the offices actually returned, with Google Patents links. Ranking counts overlapping words. It is not a patentability opinion. Not legal advice.