Factum for Claude

Connect Claude to real European law in under a minute.

What Factum does

Factum is an MCP server that puts in-force European legislation and court decisions directly inside Claude. Ask any legal question and Claude returns the specific articles that answer it — not the entire statute, not what the model “remembers” from training, not a paraphrase. Every answer is consolidated, current-as-of-today law, with a source reference you can quote in a brief or pleading.

Today Factum covers 15 European jurisdictions for legislation and Macedonian and Serbian court decisions for case-law search. New jurisdictions are added on an ongoing basis.

What you can ask it

Drop these into Claude after connecting Factum:

“Here is a non-compete clause from my employment contract (PDF attached). Is it enforceable under Serbian labor law? Cite the specific articles.”
“What are the data-breach notification deadlines under Romanian and Polish data protection law? Give me the exact articles, side by side.”
“Find three Macedonian Supreme Court decisions on unjust enrichment in commercial leases. Give me the full text of the most relevant ones.”
“I’m researching liability for self-driving cars under Serbian law. Survey existing case-law and tell me what theories courts have applied.”
“Summarize the changes the latest amendments to the Italian Civil Code introduced for tenancy contracts.”

You don’t need to know the right keywords — Factum handles synonyms, language variants, and topic discovery. You also don’t need to switch UIs: every answer arrives inside the Claude conversation, with sources you can click through.

Quick start

You need a Factum account and an API key. Both take 2 minutes.

Step 1 — Create your API key

Sign in at https://factum.law (or sign up for free).
Open Settings → MCP (or click the MCP / Connectors entry in the side menu).
Click Generate new key, give it a name (e.g. “Claude Desktop”), and copy the key. It looks like fctm_… and is shown only once — store it now.

You can have up to 5 active keys per account. Revoke any key at any time from the same screen.

Step 2 — Connect Claude

Pick the Claude product you use:

Claude.ai (web)

In Claude.ai, open Settings → Connectors → Add custom connector.
Paste this URL, replacing YOUR_API_KEY with the key you just copied:
https://mcp.factum.law/sse/YOUR_API_KEY
Save. Factum will appear in the connector list. Start a new chat and the Factum tools become available automatically.

Why the key is in the URL: Claude.ai’s custom-connector form doesn’t allow custom headers, so the key travels in the URL path. The URL is per-user and should be treated like a password — don’t share or commit it.

Claude Desktop

Open your claude_desktop_config.json (Settings → Developer → Edit Config) and add:

{
  "mcpServers": {
    "factum-legal": {
      "url": "https://mcp.factum.law/sse",
      "headers": {
        "Authorization": "Bearer YOUR_API_KEY"
      }
    }
  }
}

Restart Claude Desktop. The Factum tools appear under the connectors icon.

Claude Code

Add to your project’s .mcp.json (or your global ~/.claude/mcp.json):

{
  "mcpServers": {
    "factum-legal": {
      "type": "sse",
      "url": "https://mcp.factum.law/sse",
      "headers": {
        "Authorization": "Bearer YOUR_API_KEY"
      }
    }
  }
}

Reopen Claude Code. Factum tools appear in the tool picker.

Step 3 — Test it

Ask Claude:

“Use Factum to find me the article in Serbian labor law that governs the maximum probation period for employees.”

Claude will call legislation_search, return the relevant article(s), and quote the source. If you see articles with citations, you’re done.

Available jurisdictions

Jurisdiction	Legislation	Case-law
Austria	✓	—
Bulgaria	✓	—
Croatia	✓	—
EU (EUR-Lex)	✓	—
Greece	✓	—
Italy	✓	—
Kosovo	✓	—
Macedonia	✓	✓
Norway	✓	—
Poland	✓	—
Portugal	✓	—
Romania	✓	—
Serbia	✓	✓
Turkey	✓	—
United Kingdom	✓	—

Access to jurisdictions is tied to your Factum subscription. The basic plan unlocks a configured set; higher tiers unlock everything. Check Settings → Subscription to see what your account includes, or contact us if you need access to a specific jurisdiction.

Factum for Claude

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