Read invoices, orders, products and stock; add customers and suppliers in Silvasoft. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
Turn on the Silvasoft connector, then ask in plain words. The AI picks the tools.
For Dutch small businesses and bookkeepers that keep their books and invoices in Silvasoft.
List sales invoices by date, or only the outstanding ones. Add the invoice lines to see the items on each invoice.
Find a product by article number or EAN. Read its price, VAT and stock quantity.
List sales orders by order date or status. List purchase invoices by number or date.
List customers and suppliers with their contact and address details. Filter, page and sort the list.
Create a business customer or supplier. If one with the same e-mail, name or number exists, Silvasoft returns it and creates nothing.
Changes dataThe login page asks for your Silvasoft login e-mail and Silvasoft API key.
Get the API key from your Silvasoft dashboard. The API module must be enabled on your account, and Silvasoft shows the key only once, when it is created. The key is used only to call the API on your behalf and to derive a private account id; it is never shown to anyone.
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": {
"silvasoft": {
"url": "https://silvasoft.usefulapi.io/mcp"
}
}
} Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"silvasoft": {
"type": "http",
"url": "https://silvasoft.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: the login page asks for your Silvasoft login e-mail and Silvasoft API key. 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 Silvasoft server only. Ask your AI to run silvasoft_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 silvasoft_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 silvasoft_upgrade before then undoes the cancel. Or write to [email protected].
silvasoft_list_relationssilvasoft_list_productssilvasoft_list_orderssilvasoft_list_sales_invoicessilvasoft_list_purchase_transactionssilvasoft_list_tax_codessilvasoft_list_ledger_accountssilvasoft_list_day_registrationssilvasoft_add_business_relationsilvasoft_usage_statussilvasoft_request_featuresilvasoft_upgradesilvasoft_cancel_subscriptionList outstanding sales invoices. Check the price and stock of a product. Review sales orders and purchase invoices. Look up customers and suppliers. Add a new customer or supplier. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by Silvasoft. The server calls the Silvasoft API with your own Silvasoft 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.
The login page asks for your Silvasoft login e-mail and Silvasoft API key. See Before you connect for where to find them.
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 Silvasoft login e-mail and Silvasoft API key. 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 Silvasoft 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 Silvasoft.
Yes, if you approve it. 1 of the 9 Silvasoft tools can create or change data. The other 8 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 Silvasoft server only. Cancel any time: your paid plan then runs to the end of the paid period. Run silvasoft_usage_status to see how many calls you used.
Ask the AI to run silvasoft_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 silvasoft_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 silvasoft_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.