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Connect Cursor to Lawbster

Cursor supports MCP servers either project-locally via .cursor/mcp.json or globally via ~/.cursor/mcp.json.

Prerequisites

Setup

Create .cursor/mcp.json in the project root:

{
  "mcpServers": {
    "lawbster": {
      "type": "http",
      "url": "https://lawbster.planitprima.com/mcp",
      "headers": {
        "Authorization": "Bearer sk-legal-YOUR-API-KEY"
      }
    }
  }
}

Reload Cursor (Cmd/Ctrl + Shift + P → Reload Window). The Composer sidebar now shows Lawbster with eight tools.

Don't commit the API key

Add .cursor/mcp.json to .gitignore. Or pull the token from an env variable — Cursor supports it:

{
  "mcpServers": {
    "lawbster": {
      "type": "http",
      "url": "https://lawbster.planitprima.com/mcp",
      "headers": {
        "Authorization": "Bearer ${env:LAWBSTER_TOKEN}"
      }
    }
  }
}

Use cases in Cursor

Drafting T&Cs with real clauses: Cursor drafts terms, Lawbster supplies the relevant BGB paragraphs (§§ 305–310, § 309 Nr. 7) into the Composer context.

GDPR compliance check: While implementing data-processing code, Cursor pulls Art. 6 / Art. 9 GDPR and flags whether your legal basis is covered.

EU AI Act risk classification: When building ML pipelines, Cursor calls legal_lookup Art. 6 AI Act and annotates the code with the matching risk tier.

Global vs. project-local config

Path Effect
.cursor/mcp.json (in repo) This project only — useful for legal-tech repos
~/.cursor/mcp.json Global, all Cursor sessions

Global config is convenient for solo devs — project-local is better for teams once .gitignore keeps the token out.

Troubleshooting

Cursor doesn't show Lawbster in the Composer

Reload Cursor, check the MCP icon in the Composer. If Lawbster is missing: validate JSON with python -m json.tool < .cursor/mcp.json.

401 Unauthorized

Token prefix sk-legal- correct? Check in the portal whether the key is still active.

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