Prepare a position
Identify the courts’ approach before drafting advice, preparing a court filing, or defining a negotiating position.
Search Ten DGSI Databases
Portuguese Case Law AI
Find the Decision. Confirm the Source.
Search judicial decisions across ten DGSI databases from your AI client. Filter by court and period, retrieve the available text, and confirm every result at the official source.
Legal Question
When do Portuguese courts recognize loss of chance in civil liability?
Research Strategy
- loss of chance
- civil liability
- causation
- Courts
- Supreme & Appeal Courts
- Period
- Since 2020
What You Came to Find
You Are Not Looking for “AI.” You Need an Answer You Can Support.
Research starts with a specific legal question and ends with reading the relevant decisions. Lauyer lets you search several DGSI databases while keeping the official source central to the analysis.
Find authority
Gather relevant decisions supporting and opposing a position to assess the competing legal arguments and the development of the case law.
Verify before citing
Start with a reference, headnote, or AI-generated answer and locate the case and available text on DGSI.
Research Trail
From Question to Decision, without Skipping the Source
Lauyer structures the search and returns the information needed to select decisions. Legal interpretation still requires professional assessment.
Question
State the question in natural language and identify the concepts likely to appear in relevant decisions.
Search
Select the DGSI databases, define the period, and choose the number and ordering of results.
Leads
Compare the court, case, date, reporting judge, descriptors, and relevance before selecting decisions to read.
Source
Open the decision on DGSI, confirm its context, check possible appeals, and look for later decisions on the same issue.
Court Coverage
Ten DGSI Databases in One Search
Search the Supreme Court of Justice, Supreme Administrative Court, Court of Conflicts, five Courts of Appeal, and two Central Administrative Courts in one request, or limit the search to the relevant databases.
Each database is queried separately and may return a different set of results for the same search expression.
Court Coverage
STJ
Supremo Tribunal de Justiça
STA
Supremo Tribunal Administrativo
CON
Tribunal dos Conflitos
TRP
Tribunal da Relação do Porto
TRL
Tribunal da Relação de Lisboa
TRC
Tribunal da Relação de Coimbra
TRG
Tribunal da Relação de Guimarães
TRE
Tribunal da Relação de Évora
TCA S
Tribunal Central Administrativo Sul
TCA N
Tribunal Central Administrativo Norte
Before Opening the Judgment
Enough Information to Decide What Deserves Reading
The information shown helps assess each result before opening the complete decision page.
Before Opening the Judgment
Tribunal da Relação de Lisboa
- Court
- Identifies the DGSI database where the decision was found and the court that issued it.
- Case
- Keeps the reference needed to locate and identify the decision again.
- Date
- Helps order results and look for later decisions on the same issue.
- Official link
- Opens the public DGSI record. Lauyer does not maintain a parallel copy of the corpus.
What You Can Do
Deep Research without Turning the Page into a Technical Manual
Search by topic and court
Query one or several DGSI databases using the legal terms, courts, and period relevant to the issue.
Read full decisions
Retrieve the headnote, outcome, and full text when those elements are available on the official page.
Summarize for triage
Use an AI summary to identify decisions that deserve closer reading. The summary never replaces the original decision.
Continue in your AI client
Receive and analyze the results in an AI client supporting remote HTTP MCP and OAuth.
Trust & Limits
Faster to Find. Just as Careful to Conclude.
Lauyer helps you
Search several DGSI databases from the same question
Select decisions that deserve closer reading
Keep the official source link with every result
You still need to
Read the decision and understand its context
Check possible appeals and later decisions
Submit material conclusions to professional review
Questions Before Starting
Frequently Asked Questions about Case-Law Research
Can I limit a search to selected courts?+
Yes. Select one or several of the ten available databases, or search all of them. The court list and its codes can be retrieved without using request units.
Can I limit results by date?+
Yes. Set start and end dates, define the maximum results per database, and optionally sort decisions by date.
Do I receive the full judgment?+
Lauyer retrieves the public content made available by DGSI, including full text when it exists on the official page. Bulk retrieval is limited to 10 decisions per database in each search.
Is an AI summary a legal source?+
No. A summary supports triage and initial understanding only. It can omit exceptions or misread the text, so confirm every material statement in the original decision.
Are results always complete?+
No. The query runs when requested, but results depend on DGSI availability, coverage, and indexing, as well as the terms and filters selected.
Can I include confidential information?+
Avoid professional secrets, unpublished facts, and unnecessary personal data. Search terms are sent to DGSI. If you request an AI summary, the relevant text is also sent to the AI provider.
Does Lauyer replace a commercial legal database?+
No. Lauyer provides structured access to the public sources it integrates, but does not offer its own editorial annotations, commentary, or every feature of a commercial legal database.
Must I install an application?+
Not for Lauyer. You need an account and an AI client supporting remote HTTP MCP and OAuth. Authorization takes place in the browser.
Is this legal advice?+
No. Lauyer helps find, retrieve, and summarize sources. Selecting, interpreting, and applying decisions to a matter requires professional assessment and confirmation at the official source.
How does the Pro allowance work?+
Pro costs €10 per month and includes 1,000 request units and 40 AI summaries per UTC calendar month, shared across all tools. Each DGSI search uses 3 units, retrieving one decision uses 1 unit, and each summary uses 1 of the 40 AI summaries.
Does Lauyer store a copy of court decisions?+
No. Lauyer queries DGSI when requested and formats the response. It stores the account, authentication, billing, and usage data required to operate the service.
Your Next Search
Start with the Question. Reach the Source.
Connect a compatible AI client to Lauyer and search Portuguese judicial decisions across DGSI databases through MCP.
Search Portuguese Case Law