Read contacts, invoices and book entries; create contacts and draft invoices in Quipu. For Spanish freelancers and small businesses that invoice with Quipu. Hosted by usefulapi — connect from Claude, ChatGPT, Cursor, or any MCP client.
Team and Enterprise: an Owner adds the connector for the organization first.
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"
}
}
}No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Run these commands. The second one opens the login page:
Other MCP clients (Windsurf, Cline, Zed and more): add the URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser. Do not add an Authorization header: see Before you connect.
List the invoices of an account by payment status and contact. Ask the assistant for the total that clients still owe.
quipu_list_invoices quipu_get_invoice
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.
quipu_list_invoices quipu_list_book_entries
Find a contact by tax id or name. Read its paid and unpaid totals, then list the invoices of this contact.
quipu_list_contacts quipu_get_contact quipu_list_invoices
Create a client contact from the name, tax id and email of a new customer. Update the contact later when its data changes.
Changes data · quipu_create_contact quipu_update_contact
Find 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 data · quipu_list_numbering_series quipu_list_contacts quipu_create_draft_invoice
The 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.
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.
Turn on the Quipu connector, then ask in plain words. The AI picks the tools.
| Tool | Type | What it does |
|---|---|---|
quipu_list_contacts | read | List contacts List contacts (clients and suppliers) of the Quipu account. Filter by kind, tax id, country, email or free text. |
quipu_get_contact | read | Get contact Get one contact by id, with its totals of paid and unpaid incomes and expenses. |
quipu_list_invoices | read | List invoices List invoices (issued and received). Filter by kind, period, operation date, payment status or contact. Totals and PDF links are in the attributes. |
quipu_get_invoice | read | Get invoice Get one invoice by id. Income invoices include download_pdf_url and ephemeral_open_download_pdf_url (a temporary PDF link). |
quipu_list_book_entries | read | List book entries List all book entries (invoices, tickets and other accounting entries) in one list. Filter by type, kind, period, dates, payment status or contact. |
quipu_list_numbering_series | read | List numbering series List invoice numbering series (prefixes). Use a series id when you create a draft invoice. |
quipu_list_accounting_categories | read | List accounting categories List accounting categories (chart of accounts groups). Filter by kind, prefix or active state. |
quipu_list_accounting_subcategories | read | List accounting subcategories List accounting subcategories, optionally for one accounting category. |
quipu_create_contact | write | Create contact Create a contact (client or supplier). WRITE: it adds a record to the Quipu account. A tax id is needed before you invoice the contact. |
quipu_update_contact | write | Update contact Update fields of one contact. WRITE: it changes the record; only the fields you send change. |
quipu_create_draft_invoice | write | Create draft invoice Create a DRAFT income invoice for a contact. WRITE: it adds a draft to Quipu. It sends no issue date or number, so Quipu does not issue or register the invoice; finalize it in the Quipu app. |
quipu_usage_status | Usage status (free-tier meter) 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. | |
quipu_request_feature | Request a missing feature Tell usefulapi that the user needs something the Quipu 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. | |
quipu_upgrade | Upgrade to Pro (unlimited*) Get Pro: unlimited tool calls (fair use limit: 10,000 a month) on Quipu (the free tier caps monthly usage). Plans: "monthly" — $9/month; "yearly" — $90/year (2 months free). Cancel any time: Pro then runs to the end of the paid period, so it also suits a one-time job. *A fair use limit applies. For heavy use (near Pro's limit): "plus" or "plus_yearly" — Pro+, $39/month or $390/year, unlimited tool calls (fair use limit: 100,000 a month); an existing Pro subscription changes to Pro+ in place (needs confirm: true; the price difference for the rest of the period is charged at once). Otherwise returns a short link to open in your browser (it opens Stripe Checkout); after payment the account upgrades automatically. Does not count against the meter. | |
quipu_cancel_subscription | Cancel the Pro subscription Cancel the caller's Quipu 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 quipu_upgrade later to undo the cancel before the period ends. Does not count against the meter. |
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Proper user | $9/mo · $90/yr | Unlimited* |
*Pro fair use limit: 10,000 tool calls a month on this server. For more, write to [email protected].
Pro covers this Quipu server only. Subscribe with quipu_upgrade (it returns a Stripe Checkout link). Cancel any time with quipu_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running quipu_upgrade before then undoes the cancel. Or write to [email protected].
Check 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 unlimited tool calls (fair use limit: 10,000 tool calls a month), for this Quipu server only. Cancel any time: Pro 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: it returns a Stripe Checkout link. To cancel, run quipu_cancel_subscription. Pro 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.