DingDuff is a Claude MCP connector for legal research. It links an existing Claude account to a database containing millions of legal opinions, federal and state statutes and rules, and court filings from around the country.
The connector was built by lawyers for their own use. Emphasis has been placed on keeping the tool simple so that it runs seamlessly inside Claude without interfering with the model's reasoning or attempting to direct how the AI performs its tasks. The design prioritizes plain English prompts for research that integrate into legal workflows.
It is used daily by practicing lawyers and litigators. One attorney reported employing it to prepare a thoroughly researched Ninth Circuit opening brief through plain English prompts instead of traditional search methods, without opening Westlaw.
DingDuff operates on a tip jar model. The service is free with users able to contribute via the tip jar to support its inexpensive operation.
In the AI & ML space, DingDuff takes a focused approach. It focuses on accessing and researching millions of legal opinions, statutes, and filings efficiently within an AI chat interface without switching to traditional legal databases. DingDuff is a B2B product aimed at practicing lawyers. The product is available for free. DingDuff is available on the web and API.
DingDuff first shipped in 2026. The project is developed in the open on GitHub with 27 stars and 73 commits in the last 90 days. Among its 3 catalogued features are Legal Database Access, Plain English Prompts, and Seamless Claude Integration. It exposes integrations via an MCP server.
Latest indexed changes and source events
DingDuff: A Claude MCP connector for legal research verified by the PulseGate indexer
Other apps tracked under the same category.
