LexAtlas

LexAtlas MCP

LexAtlas is current law as data for AI: statutes and codes as structured, versioned articles with smart search, daily updates and access via API and MCP. Citations an AI assistant cannot find in the base are flagged. We are on the way to full coverage of the world's law, starting with the CIS countries.

The LexAtlas service and data are not open source; this repository contains connection docs and examples only.

Server address

https://api.lexatlas.creatora.app/mcp

Remote MCP server, Streamable HTTP. Sign-in is OAuth 2.1 with discovery, dynamic client registration and PKCE (S256). Any MCP client that supports OAuth 2.1 can connect the same way. Full step-by-step page: https://lexatlas.creatora.app/connect.

Connect

Give your AI client the one address above and sign in once: your client opens the LexAtlas sign-in page in the browser, you enter your email and the code we send you, review what the client asks for and approve it. Then the LexAtlas tools appear in the client.

Claude (web and desktop)

1. Open Customize -> Connectors and choose Add custom connector.
2. Enter a name and paste the address above.
3. Press Add, then sign in to LexAtlas when asked.

Guide: https://support.claude.com/en/articles/11175166-get-started-with-custom-connectors-using-remote-mcp

Claude Code

claude mcp add --transport http lexatlas https://api.lexatlas.creatora.app/mcp

Then open the /mcp menu inside Claude Code and sign in to LexAtlas. Docs: https://code.claude.com/docs/en/mcp

ChatGPT

Turn on developer mode and create an app for a remote MCP server, paste the address above, choose OAuth as the authentication and sign in to LexAtlas when asked. Menu names change often; follow OpenAI's guide: https://developers.openai.com/api/docs/guides/developer-mode

Cursor

Add the block below to mcp.json (project .cursor/mcp.json or the global file); Cursor shows the server as needing sign-in, follow the link to LexAtlas in your browser. Docs: https://cursor.com/docs/context/mcp

{
  "mcpServers": {
    "lexatlas": {
      "url": "https://api.lexatlas.creatora.app/mcp"
    }
  }
}

The same block is in examples/mcp-config-url.json.

Gemini CLI

Add the block below to settings.json (user or project); Gemini CLI starts the OAuth sign-in in your browser when the server asks for it. Docs: https://github.com/google-gemini/gemini-cli/blob/main/docs/tools/mcp-server.md

{
  "mcpServers": {
    "lexatlas": {
      "httpUrl": "https://api.lexatlas.creatora.app/mcp"
    }
  }
}

With an API key instead

For a client without OAuth support, send a key in a header on every request to the same address:

X-API-Key: lxa_...

Authorization: Bearer lxa_... works as well. Create keys in your account under API keys: https://lexatlas.creatora.app/account/. An HTTP API example is in examples/api-curl.sh.

Tools

Per-tool pages: https://lexatlas.creatora.app/docs/mcp/<tool>.html

Tool	What it answers	Docs
lexatlas_verify	Is the article real, in force or repealed, and how fresh is our copy.	docs
lexatlas_get	Full text with the act, status and provenance, or as it stood on a chosen date.	docs
lexatlas_history	When the article was changed and by which law, from the first version onwards.	docs
lexatlas_search	Provisions across jurisdictions, found by wording or by the situation described.	docs
lexatlas_screen	A name, alias or registered ID against official sanctions lists, quoted verbatim.	docs
lexatlas_changes	Everything amended since a date you name, for monitoring, not re-reading.	docs
lexatlas_citecheck	Every legal reference in a draft checked at once, so invented citations surface.	docs
lexatlas_pipeline	Draft laws by stage: introduced, read, signed, published.	docs
lexatlas_coverage	How complete a jurisdiction is, counted against the source's own register.	MCP page
lexatlas_calendar	Provisions coming into force in the weeks ahead, with dates.	docs
lexatlas_related	What an article relies on and what relies on it, with the meaning of each link.	docs

Pricing

Each tool call counts as a request against your free monthly allowance and then your balance. Details: https://lexatlas.creatora.app/pricing

Links

• Website: https://lexatlas.creatora.app/
• MCP page: https://lexatlas.creatora.app/mcp.html
• Connect page: https://lexatlas.creatora.app/connect
• API docs: https://lexatlas.creatora.app/api.html
• Pricing: https://lexatlas.creatora.app/pricing
• Support: https://lexatlas.creatora.app/#contact (contact form) or [email protected]

License

MIT, for this documentation and the examples only. See LICENSE.