mozaia-laws-mcp

MCP server for the Mozambican law library — give any AI agent real-time access to Mozambican legislation: current text, historical versions, validity status, and citation resolution.

Built on the Mozaia legal intelligence platform. Covers 42 legal domains, 225+ instruments from the Boletim da República, with authoritative citators and temporal versioning.

Quick start

# Install
pip install mozaia-laws-mcp

# Or run without installing (requires uvx)
uvx mozaia-laws-mcp

Get an API key at mozaia.mz/developers (free tier available).

Related MCP server: LeyChile MCP

Installation

pip / uv

pip install mozaia-laws-mcp
uv add mozaia-laws-mcp

Claude Desktop

Add to claude_desktop_config.json (~/Library/Application Support/Claude/ on macOS, %APPDATA%\Claude\ on Windows):

{
  "mcpServers": {
    "mozaia-laws": {
      "command": "mozaia-laws-mcp",
      "env": {
        "MOZAIA_API_KEY": "sk-mozaia-your-key-here",
        "MOZAIA_BASE_URL": "https://api.mozaia.mz"
      }
    }
  }
}

Cursor / VS Code (Copilot)

{
  "mcp": {
    "servers": {
      "mozaia-laws": {
        "command": "mozaia-laws-mcp",
        "env": {
          "MOZAIA_API_KEY": "sk-mozaia-your-key-here"
        }
      }
    }
  }
}

uvx (no install)

{
  "mcpServers": {
    "mozaia-laws": {
      "command": "uvx",
      "args": ["mozaia-laws-mcp"],
      "env": {
        "MOZAIA_API_KEY": "sk-mozaia-your-key-here"
      }
    }
  }
}

Configuration

Tools

search_semantic — natural language search over articles

The primary search tool. Use it when the user asks a legal question in plain language.

Inputs:

Example:

search_semantic(q="qual é o prazo de aviso prévio no contrato de trabalho?")
search_semantic(q="indemnização por despedimento sem justa causa", top_k=5)

Returns: ranked article list with excerpt, canonical citation, relevance score, and hit type.

get_law_relationships — normative graph

Reveals the full normative chain: what a diploma revokes, amends, implements, and which later instruments affect it. Use before citing a law to ensure it hasn't been superseded by a downstream instrument.

Inputs:

Example:

get_law_relationships(law_id="lei_trabalho_2007")
get_law_relationships(law_id="lei_trabalho_2007", relation_type="revokes")

Returns: outgoing and incoming relationships with peer law_id, effective date, and confidence score.

list_amendments — article version history

Returns every version of an article since original publication, with the amending law and date of each change. Essential for retroactivity analysis and past-fact disputes.

Inputs:

Example:

list_amendments(law_id="lei_trabalho_2023", article_number="128")

Returns: chronological list of versions — text, version label, amending law, validity range, and is_current flag.

search_laws — find a diploma by name or topic

Use this first when you know a law by name or subject but not its law_id.

Inputs:

Example:

search_laws(q="trabalho", domain="labour_law", year=2023)

Returns: paginated list with law_id, title, type, status, legal domain, and quota balance.

get_law_status — check if a diploma is in force

Inputs:

Example:

get_law_status(law_id="lei_trabalho_2023")

Returns: validity status (active / revoked / superseded), revoked_by_law_id when applicable, full citator badge, and publication metadata.

get_article — current text of an article

Inputs:

Example:

get_article(law_id="lei_trabalho_2023", article_number="70")

Returns: full article text, amendment/revocation status, and citator with Boletim da República reference.

get_article_at_date — historical version of an article

Retrieves the exact text that was in force on a given past date. Essential for retroactivity analysis, past-fact disputes, and temporal conflicts between norms.

Inputs:

Example:

get_article_at_date(law_id="codigo_civil_1966", article_number="217", as_of="2019-06-01")

Returns: article text at the requested date, version number, validity range, is_current flag, and temporal_alert if the norm changed shortly before or after.

cite — resolve a Portuguese legal citation

Parses a free-text Portuguese citation and resolves it to a structured law_id + article record.

Inputs:

Accepted formats:

• "Lei n.º 3/2022, artigo 15.º"

• "Decreto-Lei n.º 1/2020"

• "Constituição da República, artigo 70.º"

• "art. 102 do Código Civil"

Example:

cite(citation="Lei n.º 3/2022, artigo 15.º")

Returns: parsed_law_number, parsed_article_number, resolved_law, resolved_article, confidence score (0–1), and unresolved_reason when the diploma is not in the database.

Typical agent workflow

1. cite("Lei n.º 23/2007, artigo 128.º")
   → law_id: "lei_trabalho_2007", article: "128", confidence: 0.97

2. get_law_status(law_id="lei_trabalho_2007")
   → status: "revoked", revoked_by: "lei_trabalho_2023"

3. get_article(law_id="lei_trabalho_2023", article_number="128")
   → current text + citator

4. (if analysing a past case)
   get_article_at_date(law_id="lei_trabalho_2007", article_number="128", as_of="2018-01-01")
   → text that was in force in 2018

Error handling

Pricing

1 credit = 1 API call. Credits reset on the 1st of each month. Get a key and upgrade at mozaia.mz/developers.

Legal domains supported

labour_law · tax_law · family_law · commercial_law · criminal_law · civil_law · administrative_law · constitutional_law · environmental_law · land_law · mining_law · consumer_law · and 30 more.

Full list: search_laws(domain=<domain>) returns an empty list with a 422 if the domain is invalid.

Requirements

• Python 3.11+

• Network access to api.mozaia.mz (or your configured MOZAIA_BASE_URL)

• A valid MOZAIA_API_KEY

License

MIT — see LICENSE.

Data provided through this MCP server is subject to the Mozaia Terms of Service.