Start anywhere.
A legal question. A citation. A case name. A quote. A docket number. A pasted brief.
One Legal Engine. Many workspaces.See how it works
Bring legal research wherever you work.
Descrybe Legal Engine brings primary-law authority and verified citations into Claude, ChatGPT, and Perplexity—or into apps, agents, scripts, and firm tools you build with the Open Connector. For the research question you're working through, the brief section you're drafting, the quote you need to verify.
Search, cite, verify, and retrieve source material without leaving the workflow you're already using.
Choose standalone Legal Engine access, or the full Descrybe Platform with Legal Engine included.
Descrybe Legal Engine: $25/month. First month 50% off with code LAUNCH50.
Where it works
Use Descrybe in an assistant—or in tools you build.
Your Descrybe Legal Engine subscription works across supported assistants and the Open Connector. That means you do not need a separate Descrybe subscription for each assistant or custom tool. We are continuing to expand where Descrybe Legal Engine works, and we'll update this page as new connections are added.
Included connections
- ChatGPT
- Claude, including Claude.ai, Claude Desktop, and Claude Code
- Perplexity
- Open Connector — build your own tools
How it works.
One Legal Engine. Many workspaces.
Connect Descrybe Legal Engine to Claude, ChatGPT, or Perplexity, or use the Open Connector to build your own tools. Each path can use 13 focused legal research tools backed by a corpus of 300 million legal records, authority analysis, and a legal issue knowledge graph spanning 6.5 million identified legal issues and 16.5 million case-to-issue links.
Descrybe handles much of the hard legal-data work across millions of cases, so your assistant, agent, or app can work from cleaned text, case summaries, legal issue structure, citation relationships, treatment signals, and source passages instead of assembling raw legal materials every time you ask a question.
Legal meaning and authority both shape the search. Court and jurisdiction information, citation relationships, treatment, and other authority signals help bring important cases forward—not just the results with the most similar wording.
Your workspace calls Descrybe.
Searching cases, statutes, and regulations. Running Cytator™ checks. Resolving citations. Verifying quotes. Retrieving source PDFs. Whatever the task needs, your assistant, agent, or app can reach for the right Descrybe tool, or stack several. Where the workspace supports it, you can inspect the tool calls and results.
The law comes back into your work.
Primary-law authority, verified citations, treatment signals, and source passages — ready to use.
The legal research menu your workspace can reach for.
Analyze a legal question
Helps your assistant or app decide whether it has enough information to start legal research, and ask a few focused clarifying questions when key basics are missing.
Concept case search
Finds cases by legal issue, rule, concept, or fact pattern. Legal meaning and authority both shape the search, helping stronger cases come forward even when the wording differs.
Laws and rules search
Finds statutes, regulations, and constitutional provisions by topic, phrase, or citation, then brings back the relevant source language.
Exact case-text search
Searches judicial opinions for exact words and phrases when a quote, term of art, statutory phrase, or unusual fact pattern matters.
Case reference resolver
Turns a citation, case name, docket number, short cite, quote, or messy reference into the right case or a focused candidate list.
Case reference extractor
Reads pasted legal text and pulls out the cases being cited, grouping repeats so the authorities in play are easier to see.
Case summary and analysis
Returns a concise, research-ready summary and analysis of a known case before the workflow reasons from the opinion.
Focused case passages
Pulls the most relevant source passages from a known case so the analysis can work from the language that matters.
Case details
Brings in the case caption, court, date, available summaries, opinion inventory, and treatment overview in one place.
Case status check
Checks how later cases appear to treat an authority before you rely on it, with a quick positive, negative, cautious, or neutral signal.
Citing cases
Finds newer cases that cite the one you are looking at, useful for updates, treatment, and follow-on authority.
Quote verification
Checks whether quoted language appears in a known case and points to where the match appears.
Source PDFs
Retrieves case opinion PDFs so the underlying source is easy to inspect, print, and share.
Example prompts
Ask for Descrybe by name.
In supported assistants and apps, a clear prompt helps the workspace know when to call Descrybe Legal Engine for source-law search, citation lookup, quote verification, or treatment review.
Find primary law
"Use Descrybe Legal Engine to find primary-law cases on this issue in the relevant jurisdiction, then show me the sources I should read first."
Check a citation
"Use Descrybe Legal Engine to look up this citation, confirm the matching case, and summarize the case details I should verify."
Verify quoted language
"Use Descrybe Legal Engine to verify whether this quote appears in the cited case and show me the source passage."
Review later treatment
"Use Descrybe Legal Engine to check whether this case still appears to be good law and summarize the later treatment."
Example workflow
See one Legal Engine workflow inside Claude.
This demo shows one supported assistant using Descrybe to find legal sources, check citations, and bring back answers tied to real law. Other supported assistants and apps follow the same basic pattern: Descrybe provides the legal research tools and source material, and your workspace uses that material in the conversation or workflow.
Learn more
Understand the Legal Engine before you connect.
These guides explain what Descrybe adds to supported assistants and apps, how setup works, and how to use the Legal Engine for legal research without losing the source trail.
What is Descrybe Legal Engine?
An overview of the legal research layer, how it works, and how it relates to the full Descrybe Platform.
Read the guideSet up Descrybe in ChatGPT
Connect Descrybe Legal Engine from your dashboard or the ChatGPT plugin directory, then start a source-grounded legal research chat.
Read the guideSet up Descrybe in Claude
Connect Descrybe Legal Engine through Claude so Claude can use focused legal research tools and source-law results.
Read the guideSet up Descrybe in Perplexity
Add Descrybe Legal Engine to Perplexity as a custom MCP connector and start a source-grounded legal research chat.
Read the guideBuild your own tools with the Open Connector
Give the repository to your AI coding agent, describe the tool you want, and let the built-in instructions guide the setup.
Read the guideLegal research in your AI assistant
A practical guide to using Legal Engine in ChatGPT, Claude, Perplexity, and other supported assistants while keeping sources visible.
Read the guideChoose your Descrybe plan
Start with standalone Legal Engine access, or choose the full Descrybe Platform with Legal Engine access included.
New to Descrybe?
Choose a plan first so your account is set up with the right Legal Engine and Descrybe Platform access.