Instead of asking a general AI assistant to piece together the law from what it already knows—or copying research between tools—ask your legal question in ChatGPT, Claude, Microsoft 365 Copilot, or Perplexity. Descrybe finds primary law, resolves citations, checks quotations and treatment, and returns sources for your review.
Keep the legal research and the source trail inside the workflow where the task is already happening.
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.
How it works.
You ask the legal question in the AI assistant you already use. The assistant determines what research is needed, asks Descrybe Legal Engine for focused legal data, and uses the returned authority and source material to formulate an answer.
No technical knowledge required. You do not need to understand connectors or MCP. Sign in, choose your assistant, and connect it to your Descrybe account.
Work in the AI assistant you already use. You can start with a legal issue, citation, case name, quotation, docket number, or passage from a brief.
Client intake
Our client complained to HR about disability discrimination in Massachusetts and was terminated two weeks later. What retaliation law and cases should we review?
The assistant identifies the jurisdiction, legal issue, important facts, and research concepts in your question.
It sends focused requests for cases, governing law, treatment information, and source passages. Descrybe returns the relevant legal material with stronger authorities brought forward, not simply the opinions that repeat the same words.
Request 1
Find relevant cases by legal concept
"Massachusetts cases addressing retaliation after an internal disability discrimination complaint, including termination, temporal proximity, causation, and pretext."
Request 2
Find governing laws and rules
"Massachusetts statutes and regulations governing retaliation for disability discrimination complaints."
Request 3
Check selected authorities and source passages
"For the strongest returned cases, check later treatment and retrieve passages discussing protected activity, adverse action, temporal proximity, causation, and pretext."
Descrybe returns
Relevant cases, governing law, treatment information, and source passages
The assistant organizes Descrybe’s results into an answer to the original question and identifies the supporting sources for you to review.
Assistant answer
The returned authorities address protected activity, termination as an adverse action, and how the two-week timing may bear on causation. The assistant organizes that research into an answer and identifies the cases, governing law, treatment information, and source passages for the lawyer to review.
Where it works
One Descrybe Legal Engine subscription works across all supported assistants. You do not need a separate Descrybe subscription for each one. We are continuing to expand where Legal Engine works, and we'll update this page as new assistants and apps are added.
Use the Open Connector to bring Legal Engine into an authenticated internal app, agent, script, or firm workflow that supports your own legal research.
View the developer guideMicrosoft 365 Copilot
Use Descrybe Legal Engine to research primary law, inspect authority, and verify sources. Then turn the work into a Microsoft Word document without leaving the Cowork workspace.
Descrybe is enabled by default for Microsoft 365 tenants unless an administrator disables it. Lawyers can find it directly in Copilot's Sources menu without manually configuring an MCP connection. Legal Engine also works in Copilot Chat and Researcher, with more Microsoft 365 experiences on the way.
Inside the Legal Engine.
Descrybe has prepared 300 million legal records for AI-assisted research. Cases, citations, courts, treatment signals, legal issues, and source passages are cleaned, structured, and connected so an assistant can retrieve focused legal material instead of relying only on general model knowledge.
Legal meaning and authority both shape the search. Court and jurisdiction information, citation relationships, treatment, and other authority signals help determine which cases come forward first. Descrybe does not simply return opinions in the order that their wording resembles the question. The Legal Engine includes 13 focused research capabilities and a legal issue knowledge graph spanning 6.5 million identified legal issues and 16.5 million case-to-issue links.
The legal research capabilities available to your assistant.
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.
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.
Finds statutes, regulations, and constitutional provisions by topic, phrase, or citation, then brings back the relevant source language.
Searches judicial opinions for exact words and phrases when a quote, term of art, statutory phrase, or unusual fact pattern matters.
Turns a citation, case name, docket number, short cite, quote, or messy reference into the right case or a focused candidate list.
Reads pasted legal text and pulls out the cases being cited, grouping repeats so the authorities in play are easier to see.
Returns a concise, research-ready summary and analysis of a known case before the workflow reasons from the opinion.
Pulls the most relevant source passages from a known case so the analysis can work from the language that matters.
Brings in the case caption, court, date, available summaries, opinion inventory, and treatment overview in one place.
Checks how later cases appear to treat an authority before you rely on it, with a quick positive, negative, cautious, or neutral signal.
Finds newer cases that cite the one you are looking at, useful for updates, treatment, and follow-on authority.
Checks whether quoted language appears in a known case and points to where the match appears.
Retrieves case opinion PDFs so the underlying source is easy to inspect, print, and share.
Choose your environment
Each environment brings a different working style to the same source-law research layer. Start with the one that best matches where your firm's work already happens.
| Environment | Best fit | Example workflow idea |
|---|---|---|
| Microsoft 365 Copilot + Cowork | Firms whose matters already live inside Microsoft 365 | Use permitted matter files and email context to research governing law, then prepare a Word memorandum. |
| Claude + Cowork | Document-heavy work across files and connected systems | Compare matter documents, identify the legal issues, research supporting and contrary authority, and produce an analysis. |
| ChatGPT + Work | Flexible research, analysis, and drafting across connected sources | Move from an initial question to a researched argument outline, citation check, or working draft. |
| Perplexity | Combining current public context with primary-law research | Investigate a developing issue, then use Descrybe to find and verify the governing cases, laws, and passages. |
| Open Connector | Firms building authenticated internal tools for their own legal research | Create an internal research or brief-checking workflow powered by focused Legal Engine calls from named users. |
Capabilities vary by provider plan and administrator settings. Learn more about security and data boundaries.
Example prompts
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
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
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.
An overview of the legal research layer, how it works, and how it relates to the full Descrybe Platform.
Read the guideConnect Descrybe Legal Engine from your dashboard or the ChatGPT plugin directory, then start a source-grounded legal research chat.
Read the guideConnect Descrybe Legal Engine through Claude so Claude can use focused legal research tools and source-law results.
Read the guideConnect Descrybe as a Source, then use Legal Engine in Copilot Chat, Researcher, Cowork, and supported Microsoft 365 experiences.
Read the guideAdd Descrybe Legal Engine to Perplexity as a custom MCP connector and start a source-grounded legal research chat.
Read the guideGive the repository to your AI coding agent, describe the internal legal research tool you want, and let the built-in instructions guide the authenticated setup.
Read the guideA practical guide to using Legal Engine in ChatGPT, Claude, Microsoft 365 Copilot, Perplexity, and other supported assistants while keeping sources visible.
Read the guideStart 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.