Patent by Ouroboros Apps MCP server

Patent by Ouroboros

Patent by Ouroboros is a remote MCP server for inventors, startup founders, patent agents and attorneys, and engineers who need to check whether an idea already appears in the public patent record.

It searches United States patent records on the USPTO Open Data Portal. Google Patents is used only as a link. Every patent number in a tool result is copied from a USPTO response. The server does not fill in numbers when USPTO does not answer.

This is not legal advice. It is not a substitute for a registered patent attorney or agent. A result is not an opinion on patentability, infringement, validity, or freedom to operate.

Hosted server

• MCP server URL: https://patent-mcp.vercel.app/mcp (live, Streamable HTTP, OAuth sign-in)
• Health: https://patent-mcp.vercel.app/health
• Protected-resource metadata: https://patent-mcp.vercel.app/.well-known/oauth-protected-resource
• Connect guide: https://patent-mcp.vercel.app/connect
• Docs: https://ouroborosapps.com/docs/patent
• Coverage on the hosted server: United States patents from the USPTO Open Data Portal.
• Registry name: io.github.LAHutchins91/patent

Connect

The hosted MCP address is https://patent-mcp.vercel.app/mcp. A self-hosted copy uses its own origin plus /mcp. Locally that is http://127.0.0.1:8787/mcp.

Sign in when the assistant opens OAuth. Leave the client id and secret empty. The server supports OAuth 2.1 dynamic client registration and PKCE (S256). Do not paste a password or an office API key into the assistant.

Cursor, in ~/.cursor/mcp.json or a project .cursor/mcp.json:

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

Claude Code:

claude mcp add --transport http patent https://patent-mcp.vercel.app/mcp

ChatGPT, Claude, Gemini, Grok, and any other Streamable HTTP client: add the same URL, choose OAuth, and leave client id and secret blank. Full steps are on /connect.

A new account includes 14 days of search access. After the trial, Pro continues through Stripe Checkout. The amount is shown by Stripe, not in this repository.

server.json is the MCP Registry manifest (io.github.LAHutchins91/patent). Its remotes[0].url is the hosted server, https://patent-mcp.vercel.app/mcp, and its icon is https://patent-mcp.vercel.app/logo.jpg. A self-hosted copy should point both at its own origin.

Tools

• search_patents — keywords, claim language, CPC class, assignee, inventor, and dates
• get_patent — abstract, claims, status, family, and citations for one record
• findpatentcitations — documents that cite a patent, and documents that patent cites
• searchpriorart — an idea description in, the closest USPTO records and their Google Patents links out

Citation coverage is the USPTO grant document and USPTO office-action citations. The PatentsView citation graph is paused: USPTO paused the PatentsView PatentSearch API when PatentsView moved to the Open Data Portal on 20 March 2026.

Run locally

npm install
cp .env.example .env
npm run dev

The server listens on port 8787. GET /health returns JSON. billingConfigured is true only when STRIPESECRETKEY, STRIPEPRICEMONTHLY, and STRIPEPRICEYEARLY are all set.

npm test
npm run typecheck

Tests call the public USPTO host. Office payloads that require a key are mocked. With USPTOAPIKEY in the environment, the live test uses that key instead of expecting the unauthenticated response.

Environment

Lawrence needs to supply:

Shortened. The full README is on GitHub.