Firmafakta

Swedish company data: segment companies by industry, place and size, and look up any company by organisation number.

View on firmafakta.se

Hosted MCP Server

npx add-mcp 'https://mcp.firmafakta.se'

Installs into Claude Code, Codex, Cursor and more

Documentation

With Firmafakta in your AI assistant you ask for companies in your own words, for example "all construction companies in Halland with 10 to 49 employees". The assistant tells you how many there are and fetches the list when you want it.

Connecting takes a couple of minutes. You need a Firmafakta account (you can create one for free) and this address, which you copy and paste:

https://mcp.firmafakta.se

Claude

Quickest: add Firmafakta to Claude. The name and address are then filled in, so you click Add and go on from step 5.

  1. Open Claude, at claude.ai or in the app.
  2. Go to Connectors. It is under Customize or Settings, depending on your version.
  3. Click + and choose Add custom connector.
  4. Type Firmafakta as the name and paste the address above. Click Add.
  5. A Firmafakta window opens. Log in with your account and click Approve.
  6. Start a new chat, click + below the text box and turn Firmafakta on.

Stuck? Anthropic describes the steps in its help article on connectors.

ChatGPT

  1. Open ChatGPT, at chatgpt.com or in the app.
  2. Go to Plugins or Apps and click +.
  3. Choose to add a custom MCP server (Add custom MCP server).
  4. Type Firmafakta as the name and paste the address above.
  5. Accept the warning. A Firmafakta window opens: log in with your account and click Approve.

What is possible depends on your ChatGPT plan, and sometimes developer mode has to be turned on first. OpenAI describes it in its help article.

Claude Code, Cursor and VS Code

In Claude Code, run:

claude mcp add --transport http firmafakta https://mcp.firmafakta.se

In Cursor: add Firmafakta to Cursor.

In VS Code, run:

code --add-mcp '{"name":"firmafakta","type":"http","url":"https://mcp.firmafakta.se"}'

Log in with your Firmafakta account when asked.

Other AI assistants

Most assistants have a place in their settings where you add a connector, sometimes called an MCP server. Paste the address there and log in with your Firmafakta account when asked.

Try a question

  • How many construction companies with 10 to 49 employees are there in Halland?
  • Find all accounting firms in Gothenburg municipality and give me the list.
  • Same again, but only the ones started in the last five years.

The assistant usually counts first and asks you before it fetches, so you see what the list costs in credits. They are the same credits as on the web.