Let your AI look up the companies. Get data from Bolagsverket and other authorities through an API and MCP.
Use Claude, Codex, Cursor or your own agent to fetch board members, address, signatories, accounts, history, group structure, organisation numbers and other data.
Instruction for your AI
Read https://bolagskvarnen.se/llms.txt. Connect to the MCP server for Bolagskvarnen that is described there and fetch Swedish company data with the source and the retrieval time.Click in the box to select all of the text.
Request
GET https://app.bolagskvarnen.se/api/v1/companies/5592417309 Authorization: Bearer ••••••••
Supplier check
Norrsund Bygg & Montage AB
559241-7309, Sundsvall
Found in the register
Limited company, registered 2016-09-14
Active
No bankruptcy, liquidation or deregistration
Who may sign
The board, or two members jointly
F-tax and VAT
Approved for F-tax, registered for VAT and as an employer
Latest accounts
Financial year 2025: turnover SEK 48.6 million, 31 employees
Source Bolagsverket and SCB, retrieved 2026-10-27 at 06.12.
Infrastructure with security and traceability
Storage within the EU
All data is stored and processed within the EU.
Traceable sources
Every data item has a source and a timestamp, so you can show where it comes from.
Encrypted traffic
Everything goes over HTTPS, and every request needs an API key.
Documented suppliers
The privacy policy, the data processing agreement and the sub-processors are published on the site.
Data points for Swedish companies
Basic details
Organisation number
The company's unique number at Bolagsverket, and the key you look everything else up with.
Company name and secondary names
The registered name and the other names the company may trade under.
Legal form
Limited company, trading partnership, economic association or another of the Swedish forms.
Registration date
The day the company was registered, which shows how long it has existed.
Address and registered seat
The postal address and the municipality where the company has its seat.
Business description
The company's own description of what it does, as it stands in the register.
SNI codes
Statistics Sweden's industry codes, which say what industry the company is in.
Status
Whether the company is active or deregistered, bankrupt or in liquidation.
People and signing rights
Board and deputies
The members and deputies of the board, and the role each one has.
Managing director
The managing director, and the deputy managing director if there is one.
Auditor
The company's auditor or audit firm, and who is the auditor in charge.
Signing rules
The rule for who may sign on behalf of the company, for example two board members jointly.
Authorised signatories
The people who may sign for the company under that rule.
A person's roles
Which other companies a person has roles in, without showing the personal identity number.
Beneficial owner
The person who ultimately owns or controls the company, as registered at Bolagsverket.
Finances
Financial statements
The figures from the company's latest and earlier year-end accounts.
Income statement and balance sheet
Revenue, costs, assets and liabilities, item by item.
Key figures
Measures such as equity ratio and profit margin, calculated from the accounts.
Financial year
Which months the financial year covers, so that figures are compared correctly.
Annual reports
The annual reports the company has filed with Bolagsverket.
History
Changes over time
What has changed in the register and when, for example a new board or a new address.
Data at a point in time
What the company looked like in the register on a given date in the past.
Previous names
Names the company has had before, so you recognise it under an old name.
Deregistration
Whether and when the company was deregistered, and for what reason.
Bankruptcy and liquidation
Whether the company is or has been bankrupt or in liquidation.
Group
Parent company
The company that owns the one you look up, both the nearest one and the one at the top of the group.
Subsidiaries
The companies that the one you look up owns.
Group structure
The whole group as a tree, from the top down to every subsidiary.
Group accounts
The consolidated accounts for the whole group.
Tax and documents
F-tax
Whether the company is approved for F-tax, so you do not need to withhold tax on its invoices.
VAT registration
Whether the company is registered for VAT with the Swedish Tax Agency.
Employer registration
Whether the company is registered as an employer with the Swedish Tax Agency.
Certificate of registration
Bolagsverket's certificate of the company's registered details.
Articles of association
The company's own rules for its business, its board and its shares.
Use cases for company data through an API
Supplier check
See that a new supplier exists and is active, has F-tax and who may sign, before you write a contract or pay the first invoice.
Status, F-tax, signing rules, accounts (page in Swedish)
Municipalities and the public sector
Check suppliers in procurements and get material where the source can be shown in a decision.
Registration, F-tax, signing rules, accounts (page in Swedish)
Enrich your CRM and customer register
Fill in name, address and industry from the organisation number and keep the customer cards in your CRM up to date every week.
Name, address, SNI, status, group (page in Swedish)
Compared with Bolagsverket's own APIs
| Data | Bolagsverket, free | Bolagsverket, paid | Bolagskvarnen |
|---|---|---|---|
| Name, legal form, address, SNI, registration date | Yes | Yes | Yes |
| Digitally filed annual reports | Yes | Yes | Yes, and key figures for limited companies |
| Board, managing director, auditor and signing rules | No | Yes | Yes |
| History and changes | No | Yes | Yes |
| Search by company name | No | No | Yes |
| Source for every data item in the response | Yes | Bolagsverket is the source | Yes, with retrieval time |
| MCP for AI agents | No | No | Yes |
| Agreement and connection fee | None | Yes, SEK 5,000 | None |
Source: Bolagsverket, read 2026-10-30.
Documentation for the API and MCP
REST and JSON with one key per user, and an MCP server for Claude, ChatGPT and Cursor that gives the same responses. The source and the retrieval time are in every response.
{
"status": "ok",
"data": {
"org_number": "559241-7309",
"name": "Norrsund Bygg & Montage AB",
"legal_form": { "code": "AB", "text": "Aktiebolag" },
"status": { "active": true, "text": "Aktiv" },
"registered_date": "2016-09-14",
"seat": { "municipality": "Sundsvall" }
},
"meta": {
"request_id": "6f1c2a54-0b7e-…",
"retrieved_at": "2026-10-27T06:12:09Z"
}
}Frequently asked questions
How do we check that a supplier has F-tax and is registered for VAT?
Skatteverket's e-service Hämta företagsinformation shows whether a company is approved for F-tax and registered for VAT and as an employer, one company at a time. Central and local government authorities can ask about several companies at once through E-transport (Skatteverket, read 2026-10-27). For many suppliers in a system, SCB's free API for the business register has the same registrations. Read the guide to organisation numbers, F-tax and VAT (in Swedish).
How do you check whether a company is legitimate?
Start with what can be checked in public registers. Bolagsverket shows for free whether the company is registered, where its registered office is and whether it has a status such as bankruptcy or liquidation, and Skatteverket shows whether it has F-tax, VAT and is registered as an employer (read 2026-10-27). Also check that the person you negotiate with may sign for the company and that its annual reports have been filed. The registers say nothing about whether the company can pay its debts. How to check that a company exists and is active (in Swedish).
Who may sign agreements for a Swedish limited company?
The whole board together may always sign, and a managing director may sign in matters that belong to the day-to-day management. The board can also appoint special signatories, for example two members jointly, and this is registered with Bolagsverket (Bolagsverket, read 2026-10-27). How a given company signs is stated in its certificate of registration and in Bolagsverket's paid API. Read the guide to the board and signatories (in Swedish).
How do I see who sits on a company's board?
The board is public but not free at Bolagsverket. In the e-service Sök företagsinformation you buy the information on persons in the company or a certificate of registration, and in Bolagsverket's paid API you fetch it by machine (Bolagsverket, read 2026-10-27). Bolagsverket's free API and SCB's register do not include the board. Read the guide to the board and signatories (in Swedish).
Where can I find free information about a company?
Bolagsverket's Sök företagsinformation shows for free, among other things, status, address, registered office and registration date, and Skatteverket's Hämta företagsinformation shows F-tax, VAT and employer registration (read 2026-10-27). Digitally filed annual reports are also free. The board, signatories and certificates of registration cost money. Bolagsverket's Sök företagsinformation (in Swedish).
Are annual reports public, and how do you get them?
Yes. Almost everything registered with Bolagsverket is public, annual reports included (Bolagsverket, read 2026-10-27). You buy single annual reports in Sök företagsinformation. Those filed digitally are free in Bolagsverket's API and weekly files for high-value datasets, but scanned annual reports are not included there. Read the guide to annual reports (in Swedish).
Does Bolagsverket have an API, and what does it cost?
Yes, two. The API for high-value datasets is free and needs no agreement, but lacks the board and signatories among other things. The API for company information has them and costs SEK 5,000 to connect and SEK 1,000 to 24,000 a month for 500 to 15,000 transactions, excluding VAT (Bolagsverket, read 2026-10-27). Read Bolagsverket's API explained.
Is there a free API for Swedish company data?
Yes, two. Bolagsverket's API for high-value datasets gives basic data and digitally filed annual reports, and SCB's API for the business register gives industry, workplaces and number of employees in size classes (Bolagsverket and SCB, read 2026-10-27). Among the authorities' APIs, the board, signatories and history are only in Bolagsverket's paid one. Bolagskvarnen brings both authorities' data together in one API. Compare building it yourself with a ready API (in Swedish).
How do we keep our customer register up to date when companies change address, name or board?
Bolagsverket can send notifications of changes to your system. They are included at no extra cost in the paid API from the level of 3,000 transactions a month (Bolagsverket, read 2026-10-27). Without an agreement you can compare against Bolagsverket's free file of all organisations, updated every week, or buy SCB's notifications of changes. Read the guide to history and changes (in Swedish).
How do we get industry, size and number of employees into our CRM?
SCB's business register has the industry (SNI code), workplaces and number of employees in size classes for every company, and the API has been free since 26 June 2025 (SCB, read 2026-10-27). You need a personal API key, and each call returns at most 5,000 rows. Turnover is in the annual reports. Read SCB's business register via API explained (in Swedish).
How do I find a company's parent company and subsidiaries?
There is no register of groups. Bolagsverket does not register who owns shares, and the share register is kept by the company itself (Bolagsverket, read 2026-10-27). The group shows instead in the annual reports, for example in the consolidated accounts, and those filed digitally are free to fetch. Read the guide to group structure (in Swedish).
Can you see who was on the board on a given date?
Yes. In Bolagsverket's paid API you can send a point in time and get the information that applied then, for example the board and the signatories (Bolagsverket, read 2026-10-27). Bolagsverket's free API and SCB's API have no history. Read the guide to history and changes (in Swedish).