Jusratio is a legal research platform that connects to AI assistants like Claude and ChatGPT via the MCP standard, enabling them to search and cite real Brazilian jurisprudence and legislation. It indexes over 46 million decisions from 119 courts and administrative bodies, ranking results by legal authority and currency to reduce AI hallucinations. The platform provides verifiable sources for every citation, allowing legal professionals to trust and confirm AI-generated content.
Funding
Funding not disclosed
Founders
Product
Problem
Legal professionals using general-purpose AI assistants for legal work face the risk of fabricated citations, non-existent cases, and outdated precedents, as these models generate text based on statistical probability. Verifying every AI-generated legal claim is time-consuming, and citing incorrect or superseded case law damages credibility before a court.
Solution
Jusratio provides a semantic legal search engine that integrates with existing AI assistants through the Model Context Protocol (MCP), allowing tools like Claude and ChatGPT to search over a database of over 46 million Brazilian court decisions Sequence. The platform indexes decisions, consolidated federal legislation, and administrative precedents, ranking results using a proprietary hybrid algorithm that prioritizes legal authority hierarchy and the currentness of the understanding. When the AI retrieves documents through Jusratio, responses are constructed from real, verifiable sources with identified references for checking, reducing the risk of hallucination. The service signals when coverage is weak rather than filling gaps with invented precedents, giving legal professionals a foundation they can trust.
Target Audience
Primary customers are legal professionals including lawyers, attorneys, legal researchers, and law firms who use AI assistants for legal research, document drafting, and citation checking, as well as legal teams needing centralized access management and usage auditing.
Features
- Semantic search that understands plain Portuguese and technical legal terms, matching by meaning rather than just keywords
- Proprietary ranking algorithm that orders results by authority hierarchy (A to E) and recency, placing binding precedents above persuasive decisions
- Coverage of over 46 million decisions from 119 courts and bodies, including all 27 state courts, 24 labor courts, 7 federal courts, and administrative bodies like CARF and TCU
- Consolidated federal legislation searchable article-by-article, with revoked articles flagged, including the tax reform
- Identified sources for every result, including court, rapporteur, date, and link to the full text when available
- Integration with Claude via official connector and ChatGPT via developer mode, plus compatibility with other MCP clients