sevdesk MCP server

Look up contacts, invoices, vouchers, orders, bank transactions and parts, and create drafts. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.

Connect sevdesk50 free tool calls a month

What can I ask?

Turn on the sevdesk connector, then ask in plain words. The AI picks the tools.

Which invoices are still unpaid, and how much do customers owe?
What is the current balance of my business bank account?
Show me the bank payments that came in last month.
Which receipts and bills did I record this month?

What you can do with sevdesk in Claude and ChatGPT

For small business owners and bookkeepers who do invoicing and accounting in sevdesk.

See which invoices are still unpaid

The AI lists invoices by status, date range or contact and opens one with totals and line items. You see which are open or partly paid.

Check bank balance and payments

The AI lists the payment accounts, reads the balance of one at a date, and lists bank transactions in a date range, for example payments that came in last month.

Review receipts and bills by status

The AI lists vouchers (receipts and bills) by status and by credit or debit, and opens one. You see what was recorded and what is unpaid.

Look up a customer and add contact details

The AI finds a contact, reads its email, phone and website entries, and adds a new email, phone or website to it.

Changes data

Prepare a draft invoice

The AI creates an invoice with line items for a contact. It is always saved as a draft, not sent, and you can edit it in sevdesk.

Changes data

How do I connect sevdesk?

Before you connect

The login page asks for your sevDesk API token.

Find it in sevDesk → Settings → Users → your user → API token (32 hex characters). API access requires a paid sevDesk plan. Your token is used only to call the API on your behalf and to derive a private account id; it is never shown to anyone.

Claude claude.ai · Desktop

Open Customize → Connectors, then click + Add → Add custom connector.
Enter the name sevdesk and this URL, then click Add:
https://sevdesk.usefulapi.io/mcp
Claude opens the login page: enter your sevDesk API token.
In a chat, click + → Connectors and turn on sevdesk.

Team and Enterprise: an Owner adds the connector for the organization first.

ChatGPT chatgpt.com

Open Plugins, click +, then Add custom MCP server.
Enter the name sevdesk and this URL, choose OAuth as the authentication, confirm the warning and create it:
https://sevdesk.usefulapi.io/mcp
ChatGPT opens the login page: enter your sevDesk API token.
In Plugins, install sevdesk, then choose it in a chat.

No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.

Claude Code

Run this command, then run /mcp in Claude Code to log in:

claude mcp add --transport http sevdesk https://sevdesk.usefulapi.io/mcp

Cursor

Add to Cursor or add this to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "sevdesk": {
      "url": "https://sevdesk.usefulapi.io/mcp"
    }
  }
}

VS Code

Add to VS Code or add this to .vscode/mcp.json:

{
  "servers": {
    "sevdesk": {
      "type": "http",
      "url": "https://sevdesk.usefulapi.io/mcp"
    }
  }
}

Codex

Run these commands. The second one opens the login page:

codex mcp add sevdesk --url https://sevdesk.usefulapi.io/mcp

codex mcp login sevdesk

Other clients

Windsurf, Cline, Zed and other MCP clients: add this URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser.

https://sevdesk.usefulapi.io/mcp

Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your sevDesk API token. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.

Pricing

Plan	Price	Limit
Free	$0	50 tool calls / month
Proper user	$9/mo · $90/yr	10,000 tool calls / month
Pro+per user	$39/mo · $390/yr	100,000 tool calls / month

Each paid plan covers this sevdesk server only. Ask your AI to run sevdesk_upgrade and choose Pro or Pro+, billed monthly or yearly (it returns a Stripe Checkout link). If you already have Pro, ask to change it to Pro+. The change requires your confirmation, keeps your billing interval and charges the price difference for the rest of the period immediately. Cancel any time with sevdesk_cancel_subscription: your paid plan continues to the end of the paid period, with no refund for the current period, and asking to resume the same plan with sevdesk_upgrade before then undoes the cancel. Or write to support@usefulapi.io.

Tools 24

Show all 24 tools (the AI picks them for you)

Read only · 16

Get the bookkeeping system versionsevdesk_get_bookkeeping_system_version
Return whether the account runs sevdesk bookkeeping 1.0 or 2.0 (2.0 uses taxRule instead of taxType on invoices). Also a cheap way to confirm the API token works.
List contactssevdesk_list_contacts
List contacts (customers, suppliers, partners, prospects). By default sevdesk returns only organisations; set include_persons to also get individual persons.
Get one contactsevdesk_get_contact
Fetch a single contact by id.
List contact emails, phones and websitessevdesk_list_communication_ways
List communication ways (email addresses, phone and mobile numbers, websites), optionally for one contact.
List communication way keyssevdesk_list_communication_way_keys
List the labels a communication way can carry (1 Privat, 2 Arbeit, 3 Fax, 4 Mobil, 6 Autobox, 7 Newsletter, 8 Rechnungsadresse). Needed for sevdesk_add_communication_way.
List invoicessevdesk_list_invoices
List invoices, filterable by status, number, date range and contact. Status: 50 deactivated recurring, 100 draft, 200 open/due, 750 partially paid, 1000 paid.
Get one invoicesevdesk_get_invoice
Fetch a single invoice by id — totals, status, dates, contact and contact person.
Get an invoice's line itemssevdesk_get_invoice_positions
List the positions (line items) of one invoice: name, quantity, price, tax rate, sums.
List vouchers (receipts)sevdesk_list_vouchers
List vouchers — receipts and incoming/outgoing bills. Status: 50 draft, 100 unpaid/due, 1000 paid. credit_debit C = credit (revenue), D = debit (expense).
Get one vouchersevdesk_get_voucher
Fetch a single voucher (receipt) by id.
List credit notessevdesk_list_credit_notes
List credit notes (Gutschriften), filterable by status, number, date range and contact. Status: 100 draft, 200 open/delivered, 750 partially paid, 1000 paid.
List orders and quotessevdesk_list_orders
List orders — quotes (Angebote), order confirmations and delivery notes — filterable by status, number, date range and contact. Status: 100 draft, 200 delivered, 300 rejected, 500 accepted, 750 partially calculated, 1000 calculated.
List parts (products)sevdesk_list_parts
List parts — the products and services in the sevdesk inventory, with prices, tax rate and stock.
List payment accountssevdesk_list_check_accounts
List check accounts — the bank accounts, cash registers and clearing accounts sevdesk tracks payments on, with IBAN, type and sync status.
Get a payment account's balance at a datesevdesk_get_check_account_balance
Balance of one check account as the sum of every transaction sevdesk knows up to and including the given date. May differ from the real bank balance if older transactions were never imported.
List bank transactionssevdesk_list_transactions
List check-account transactions (bank payments in and out), filterable by account, booking state, date range, payee/payer and purpose.

Changes data · 4

Create a contactsevdesk_create_contact
Create a contact. Give `name` for an organisation, or `surename`/`familyname` for a person. Addresses and emails are separate (use sevdesk_add_communication_way).
Update a contactsevdesk_update_contact
Update fields on an existing contact; only the fields you pass are sent.
Add an email, phone or website to a contactsevdesk_add_communication_way
Attach an email address, phone/mobile number or website to a contact. key_id labels it (2 Arbeit/work is a good default; see sevdesk_list_communication_way_keys).
Create a draft invoicesevdesk_create_draft_invoice
Create a normal invoice (type RE) with its line items, ALWAYS saved as a DRAFT (status 100): it is not sent, not booked and stays editable in sevdesk. contact_person_id is the sevdesk USER responsible for it — copy contactPerson.id from any existing invoice (sevdesk_get_invoice). Bookkeeping 2.0 accounts use tax_rule_id (1 = taxable sales in Germany, the usual choice); 1.0 accounts pass tax_type instead (check sevdesk_get_bookkeeping_system_version).

Your usefulapi plan · 4

Usage status (free-tier meter)sevdesk_usage_status
Report the caller's current usage: the plan, calls used this month, the limit of the plan (the free monthly cap or the Pro fair use limit), remaining, and whether the limit is reached. Read-only; does not count against the meter.
Request a missing featuresevdesk_request_feature
Tell usefulapi that the user needs something the sevdesk tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter.
Upgrade to Pro or Pro+sevdesk_upgrade
Get a paid plan for sevdesk (the free tier caps monthly usage). Pro: 10,000 tool calls a month, for normal use — plan "monthly" ($9/month) or "yearly" ($90/year, 2 months free). Pro+: 100,000 tool calls a month, for automations and heavy use — plan "plus" ($39/month) or "plus_yearly" ($390/year). Without a plan it returns both Pro and Pro+, each with a payment link, for the user to choose; with a plan, one link. An existing Pro subscription changes to Pro+ in place: call without confirm first, as the reply states the exact charge for this account (the price difference for the rest of the period, or in a free Pro trial the full Pro+ price, as the trial ends); then call with confirm: true. Cancel any time: the plan then runs to the end of the paid period, so it also suits a one-time job. A link opens Stripe Checkout in the browser; after payment the account upgrades automatically. Does not count against the meter.
Cancel the Pro subscriptionsevdesk_cancel_subscription
Cancel the caller's sevdesk Pro subscription at the end of the paid period (no refund for the current period; Pro continues until then, then the free tier applies). Requires confirm: true. Run sevdesk_upgrade later to undo the cancel before the period ends. Does not count against the meter.

FAQ

What can I do with sevdesk in Claude or ChatGPT?

See which invoices are still unpaid. Check bank balance and payments. Review receipts and bills by status. Look up a customer and add contact details. Prepare a draft invoice. See what you can do for the details.

Is this an official sevdesk product?

No. usefulapi is an independent service. It is not affiliated with or endorsed by sevdesk. The server calls the sevdesk API with your own sevdesk access, so it sees only the data that your account can see.

Can I connect sevdesk to Claude or ChatGPT?

Yes. In Claude, add this server's URL as a custom connector. In ChatGPT, add it as a custom MCP server in Plugins. Then log in once. Cursor, VS Code, Claude Code and Codex work too. See the setup steps.

What do I need to connect?

The login page asks for your sevDesk API token. See Before you connect for where to find it.

Do I put my sevdesk key or an Authorization header in the client config?

No. Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your sevDesk API token. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.

How do you keep my sevdesk credentials?

The login stores them encrypted in the authorization grant of your connection. The server uses them to call the sevdesk API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in sevdesk.

Can the AI change my sevdesk data?

Yes, if you approve it. 4 of the 20 sevdesk tools can create or change data. The other 16 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.

What does it cost?

The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with 10,000 tool calls / month. Pro+ costs $39/mo or $390/yr, with 100,000 tool calls / month. Each subscription covers this sevdesk server only. Cancel any time: your paid plan then runs to the end of the paid period. Run sevdesk_usage_status to see how many calls you used.

How do I subscribe or cancel?

Ask the AI to run sevdesk_upgrade and choose Pro or Pro+, billed monthly or yearly: it returns a Stripe Checkout link. If you already have Pro, ask to change it to Pro+. After you confirm, your existing subscription changes in place, keeps its billing interval and charges the price difference for the rest of the period immediately. To cancel, run sevdesk_cancel_subscription. Your paid plan continues to the end of the paid period.

What if a sevdesk tool that I need is missing?

Tell the AI what you wanted to do. It can send the request with sevdesk_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.

Which AI clients can I use?

Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, ChatGPT, Codex, Cursor, VS Code, Windsurf and others.

This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.

Need a tool this server does not have, or a connection to another system? We build custom integrations and MCP servers.

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