Read contacts, invoices and book entries; create contacts and draft invoices in Quipu. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
Turn on the Quipu connector, then ask in plain words. The AI picks the tools.
For Spanish freelancers and small businesses that invoice with Quipu.
List the invoices of an account by payment status and contact. Ask the assistant for the total that clients still owe.
List the issued invoices of a period and read the totals with VAT and IRPF retention. Ask the assistant to sum them for a tax return.
Find a contact by tax id or name. Read its paid and unpaid totals, then list the invoices of this contact.
Create a client contact from the name, tax id and email of a new customer. Update the contact later when its data changes.
Changes dataFind the numbering series and the contact. Create a draft invoice with the lines for the work done. You finalize the draft in the Quipu app.
Changes dataThe login page asks for your Quipu API client ID, Quipu API client secret and Quipu account slug.
Create the API credentials in Quipu → Settings → API. The account slug is the first part of your Quipu URL (getquipu.com/slug/...). Your credentials are used only to call the Quipu API on your behalf; they are 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": {
"quipu": {
"url": "https://quipu.usefulapi.io/mcp"
}
}
} Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"quipu": {
"type": "http",
"url": "https://quipu.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 Quipu API client ID, Quipu API client secret and Quipu account slug. 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 Quipu server only. Ask your AI to run quipu_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 quipu_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 quipu_upgrade before then undoes the cancel. Or write to [email protected].
quipu_list_contactsquipu_get_contactquipu_list_invoicesquipu_get_invoicequipu_list_book_entriesquipu_list_numbering_seriesquipu_list_accounting_categoriesquipu_list_accounting_subcategoriesquipu_create_contactquipu_update_contactquipu_create_draft_invoicequipu_usage_statusquipu_request_featurequipu_upgradequipu_cancel_subscriptionCheck which invoices are unpaid or overdue. Add up the invoiced amounts of a quarter. Review the account history of one client. Add a new client as a contact. Prepare a draft invoice for a client. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by Quipu. The server calls the Quipu API with your own Quipu 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 Quipu API client ID, Quipu API client secret and Quipu account slug. 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 Quipu API client ID, Quipu API client secret and Quipu account slug. 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 Quipu 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 Quipu.
Yes, if you approve it. 3 of the 11 Quipu 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 Quipu server only. Cancel any time: your paid plan then runs to the end of the paid period. Run quipu_usage_status to see how many calls you used.
Ask the AI to run quipu_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 quipu_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 quipu_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.