IAJUS brings together case law, legislation and open-access legal scholarship. Find relevant material, read the supporting sources and research through your AI assistant or the IAJUS web portal.
Legal documents and research interfaces remain in Portuguese. Setup, coverage and access pages linked below are also in Portuguese.
Court decisions and legislation are collected directly from the public institutions that publish them. IAJUS records provenance and removes duplicate records. Source links let you check the original material whenever available.
Research decisions from Brazilian courts and qualified precedents, including súmulas, general repercussion rulings and repetitive-case rulings. The case-law collection focuses on decisions issued by panels, chambers and plenary courts.
Consult federal, state and municipal legislation from official sources, including the Planalto portal, legislative assemblies and official gazettes.
Read open-access legal scholarship with the publication reference preserved. Use it alongside legislation and case law to understand the legal question in context.
Coverage varies by institution, period and collection. Read the coverage and data notes to see what is included and where the collection is still expanding.
Different research questions call for different ways of searching. IAJUS combines text-based search with a legal classification aligned with the Brazilian National Council of Justice taxonomy.
Describe the matter in your own words to find decisions on the same issue, even when the court uses different wording.
The default search combines meaning, full text, approximate text matching, case numbers and areas of law, then merges the ranked results.
Search for a specific expression in Portuguese or narrow the collection by court, year, reporting judge, area of law or type of legislation.
Browse from a branch of law to a subarea and subject. Citation links between decisions offer another way to trace precedents; this search method is still experimental.
Connect your assistant through an IAJUS plugin or an MCP connection, or use the IAJUS web portal. The integration guide describes the available platforms and how to connect with your IAJUS account.
The guide covers Claude, ChatGPT and ChatGPT Work/Codex, Gemini, Perplexity, Mistral, Manus and Grok. Other MCP-compatible applications can also connect.
WhatsApp and email are also IAJUS channels. Compare the published plans for their included features and contact the team about the channels and usage you need.
IAJUS searches its collection and answers from the material it finds, with links to the supporting decisions. When it does not find a result, the answer says so. Read the original text before relying on a citation.
The law-firm offering combines integration into the team's existing tools, a shared usage allowance and training in the responsible use of AI.
Beta access is by invitation and is free while the beta programme lasts. For paid plans or a law-firm integration, speak to the team about your requirements.