Business account for AI agents

Give an AI agent a card.
Keep the receipts.

One mandate, signed with your passkey. Every payment is checked against it: budget, vendor, ceiling.

Free while we are in early access · No card details to start

Das Quaestrum-Dashboard mit drei Agenten, ihren Karten und Budgets

Every payment your agent makes is checked against a mandate you signed

Works with

Model Context ProtocolClaudeChatGPT

Built in Europe · Append-only audit log · Passkey-signed mandates

Everything your agents spend, in one place

Three screens from the running dashboard. The amounts, the refusals and the timestamps in them are real.

Every agent has a card and a ceiling

One card per agent, frozen at €0 until a payment passes the mandate. The panel on the right shows what it may spend, what it has spent, and the rules it is spending under.

Die Agentenansicht des Dashboards mit ausgewähltem Agenten, Karte, Budget und Regeln
Agent-first

Your agent does the paperwork

Forms, a register number, waiting. An agent is good at exactly that. You appear twice, and both times because the law says a person has to.

  1. 01Create your account30 seconds
  2. 02Paste the connector into Claudeone block, filled in for you
  3. 03Tell it what you wantit does the forms
Where you come in
You prove who you areanti money laundering lawYou sign the mandatepasskey, verified server-side
Create your account
nordwind — claude✻ Welcome to Claude Codecwd: ~/nordwind · quaestrum mcp connected> Open a business account for Nordwind GmbH.✻ Assembling the file…quaestrum · register_company(legal_name: "Nordwind GmbH")⎿ 4 of 8 fields saved · nothing submittedFour fields I am not allowed to guess. What is yourregister number, office, VAT id and beneficial owner?> HRB 218 447 B, Kurfürstendamm 21, Jan Berger 100 %quaestrum · register_company(register_no: "HRB 218 447 B", …)⎿ 8 of 8 fields saved · nothing submittedFile complete. Nothing has gone to the bank.Your link, valid one hour, single use:https://quaestrum.com/h/7f3ac1>Open a business account for Nordwind GmbH.HRB 218 447 B, Kurfürstendamm 21, Jan Berger 100 %⏵⏵ quaestrum mcp · 12 toolsauto-accept edits offquaestrum.com/h/7f3ac1STEP 1 OF 2Check your company fileLegal nameNordwind GmbHRegister numberHRB 218 447 BRegistered officeKurfürstendamm 21, 10719 BerlinBeneficial ownerJan Berger, 100 %Nothing has been sent yet. Your confirmation is your declaration,so it has to come from you and not from the agent.Confirm and continueCorrect anything that is wrong.STEP 2 OF 2Prove who you areOpen this on your phone, where the camera is.You need an ID card or a passport.The agent cannot do this step. The legitimationhas to come from a real person.Completing it also files the confirmed KYBwith the banking partner. The two go together.Waiting for your phone…VerifiedYour company file has been filed with the banking partner.The agent can be connected now, and it still cannot spendanything until you sign a mandate with your passkey.Open the dashboard

The questions people actually ask

If one of them is a dealbreaker, better now than after you have built on it.

Ask something else
What stops an agent from spending everything?

The mandate, checked on every request: monthly budget, per-payment ceiling, allowed card vendors, allowed creditor IBANs, and a threshold above which it has to ask you. A request outside those rules is refused before any money moves, and the refusal is logged with the rule that produced it.

Does the agent have my password?

No. Each agent has its own token, and that token can only request payments under its mandate. We store a fingerprint of it, never the token itself.

What if a token leaks?

Replace it in the dashboard and the old one stops working in the same moment. Whatever it did in the meantime is bounded by the mandate and sitting in the audit log.

Who holds the money?

Not us, by design. Custody, card issuing and payment execution belong with a licensed banking partner. That partner is not connected yet, which is why no real money moves today.

Can I get my data out?

The audit log exports to CSV with every request, decision and refusal. It is only ever added to, so two exports taken a month apart agree about what happened.

What does it cost?

Nothing while we are in early access, and there is no card to enter. When there is a price it will be for the control layer, not a cut of your payments.

Better control over agent spend starts here