Read sales, products, stock, balance and payouts; create products in Zettle. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
Turn on the Zettle connector, then ask in plain words. The AI picks the tools.
For shop and cafe owners who sell with a Zettle point of sale.
List the purchases of a day with the amounts, payments and refunds. Open one purchase to read the line items and the VAT.
List the stock locations. Read the stock balance of each product variant and compare it with the low-stock level.
Read the account balance and the payout information. List the latest transactions to see the fees and the payouts.
List the products with the variants, SKU and price. Read the categories and the discounts of the library to find gaps.
Create a product with a name, a price and a VAT rate. The tool does not check for duplicates. Run it once for each product.
Changes dataYou sign in with your Zettle account and approve the access (OAuth). You do not need an API key.
This server reads your sales, products, stock and balance, and can create products when you ask it to. Only the Zettle account owner can approve access. You can disconnect it any time in Zettle.
Team and Enterprise: an Owner adds the connector for the organization first.
No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Run this command, then run /mcp in Claude Code to log in:
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"zettle": {
"url": "https://zettle.usefulapi.io/mcp"
}
}
} Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"zettle": {
"type": "http",
"url": "https://zettle.usefulapi.io/mcp"
}
}
} Run these commands. The second one opens the login page:
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.
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: you sign in with your Zettle account. 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.
| 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 Zettle server only. Ask your AI to run zettle_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 zettle_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 zettle_upgrade before then undoes the cancel. Or write to [email protected].
zettle_get_accountzettle_list_purchaseszettle_get_purchasezettle_list_productszettle_get_productzettle_list_categorieszettle_get_libraryzettle_list_inventorieszettle_get_stockzettle_get_stock_for_productszettle_get_account_balancezettle_list_account_transactionszettle_get_payout_infozettle_create_productzettle_usage_statuszettle_request_featurezettle_upgradezettle_cancel_subscriptionReview yesterday's sales and refunds. Find products that run low on stock. Check the balance and the next payout. Review the product library, categories and discounts. Add a new product to the library. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by Zettle. The server calls the Zettle API with your own Zettle access, so it sees only the data that your account can see.
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.
A Zettle account. You sign in to Zettle and approve the access. You do not need an API key.
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: you sign in with your Zettle account. 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.
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Zettle 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. You can revoke the access in Zettle at any time.
Yes, if you approve it. 1 of the 14 Zettle tools can create or change data. The other 13 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.
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 Zettle server only. Cancel any time: your paid plan then runs to the end of the paid period. Run zettle_usage_status to see how many calls you used.
Ask the AI to run zettle_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 zettle_cancel_subscription. Your paid plan continues to the end of the paid period.
Tell the AI what you wanted to do. It can send the request with zettle_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.
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.