Terms of Service
Last updated: 29 September 2026
1. Who we are
The Ametyst service ("Service") is provided by AMETYST SRL, a single-member limited liability company (società a responsabilità limitata con socio unico), registered office Corso Magenta 56, 20123 Milano (MI), Italy, VAT no. and tax code IT14681630969, Milan Companies Register no. 14681630969, REA MI-2800625, share capital €10,000.00 fully paid-in, certified email ametystsrl@pec.it ("Ametyst", "we"). Contact: support@ametyst.ai.
2. Who can use the Service
The Service is offered to companies, professionals and other organisations acting for purposes related to their trade, business or profession ("Business Customers"), and to individuals acting for purposes outside their trade, business or profession ("Consumers"). Business Customers and Consumers are together the "Customer". If you create an account on behalf of an organisation you confirm that you have authority to bind it. If you are a Consumer, the mandatory protections of the law of your country of residence, including the Italian Consumer Code (Legislative Decree 206/2005) where applicable, prevail over anything in these Terms that would reduce them; clause 18 says how these Terms apply to you.
3. The Service
Ametyst is spend management for AI agents. It shows the Customer what every person and agent in its organisation spends on AI, lets the Customer set a spending policy for each agent, and proposes a cheaper model or tool for each step of the Customer's workflows. Ametyst never applies a proposal without the Customer's approval.
By installing the Ametyst MCP on its own agent, the Customer lets that agent call the models and tools in the Ametyst catalog with one key, within the budgets and policies the Customer sets, with reporting of every call.
Ametyst's proposals and all models and tools in the catalog are supplied to the Customer by Ametyst, in Ametyst's own name and at Ametyst's listed prices. Ametyst sources some tools from third-party providers, which act as Ametyst's suppliers. The Customer has no contract with those providers and makes no payment to them through the Service.
Accounts the Customer connects itself (for example its email, documents or chat tools) remain the Customer's: the Customer's agent accesses them with the Customer's own credentials, which are not sent to Ametyst.
4. Accounts
The Customer is responsible for the people and agents it authorises in its account, for the budgets and policies it sets, for the changes it approves, and for keeping credentials secure. Activity carried out with the Customer's credentials is treated as the Customer's.
5. Credits
5.1 Nature. Credits are a prepayment for Ametyst services and the unit in which all Ametyst prices are expressed. Credits are not money, electronic money, a deposit or a financial instrument, and earn no interest.
5.2 Limits. Credits (a) can be used only to pay for services supplied by Ametyst through the Service; (b) cannot be used to pay third parties; (c) cannot be transferred, sold or assigned to another account or person; (d) cannot be converted into or redeemed for money, except where the Refund Policy or mandatory law provides for a refund.
5.3 Purchase. Credits are bought in the dashboard, in euro, by card or wire transfer, and are expressed in euro: the credit added to the account equals the amount paid, net of VAT. If the Customer pays with a card in a currency other than euro, the payment processor converts the amount at checkout, at the rate and cost it shows the Customer before payment; the Customer may choose to pay in euro instead. Payments are processed by Stripe; Ametyst does not store card data. Credits are added to the account after payment is confirmed.
5.4 Use. Each model or tool call and each Ametyst service has a listed price in credits, shown before use, deducted from the credit balance when the call succeeds.
5.5 No expiry. Purchased credits do not expire while the account is open.
5.6 Promotional credits. Credits granted free of charge have no cash value and are never refundable. Plans do not include credits.
6. Plans
Ametyst offers Pay per use, the Pro monthly plan and Enterprise, described on the pricing page. Pro is billed in advance each month for every seat in the account: when the Customer takes Pro, every person in the account is on Pro. It renews automatically until cancelled. Enterprise is agreed in writing with the Customer; where that agreement says nothing, these Terms apply. Ametyst may change the price of a plan from the next renewal, with at least 15 days' notice by email. The Customer can cancel at any time from Settings; cancellation takes effect at the end of the billing period already paid, and the account then continues on Pay per use. Fees for a period already started are not refunded; for Consumers, clause 18.3 applies.
7. Prices, taxes and invoices
Prices of models, tools and Ametyst services are listed in credits and include Ametyst's margin. Ametyst may change listed prices and plan prices over time, including to reflect changes in its costs. A new listed price applies only to use after it is shown in the catalog and never affects credits already spent; a new plan price applies from the next renewal, with at least 15 days' notice by email.
Credits and plans are sold in euro, VAT excluded. VAT is applied at payment according to the Customer's country and VAT status. Ametyst issues an invoice for each payment, always in euro on the euro amount (also when the Customer's card was charged in another currency), showing the amount paid and, for top-ups, the credits received, to the billing details the Customer enters in Settings → Invoice; the Customer is responsible for their accuracy. Italian customers receive an electronic invoice through the Sistema di Interscambio (SDI).
8. Refunds and cancellation
Governed by the Refund and Cancellation Policy, which forms part of these Terms.
9. Chargebacks and payment disputes
If a payment is disputed, reversed or flagged as fraudulent, Ametyst may suspend the account, remove the corresponding credits, and, where those credits were already used, invoice the Customer for the amount used. Please contact support before opening a dispute with your card issuer: we can usually resolve it faster.
10. Acceptable use
The Customer must not: use the Service unlawfully or to infringe others' rights; resell or sublicense credits or raw access to the Service; attempt to bypass budgets, policies, rate limits or security controls; use a tool in breach of the usage restrictions shown for it in the catalog. Ametyst may suspend access in case of breach, security risk or suspected fraud.
11. Ametyst's proposals, availability and changes to the catalog
Ametyst's reports and proposals (for example a cheaper model or tool for a step) are suggestions produced by automated systems: they can be wrong, and the Customer decides whether to apply them. Ametyst may add, change or remove models and tools. If one is removed, unused credits remain usable on the rest of the Service. The Service is provided with reasonable skill and care; Ametyst does not guarantee that a given tool is uninterrupted or that third-party data is accurate or complete.
12. Customer data
The Customer's tasks, their memory and the content of tool calls are the Customer's. Ametyst processes them only to deliver the Service, and reads them inside the Customer's account for that purpose only. Personal data is handled as described in the Privacy Policy.
13. Intellectual property
Ametyst keeps all rights in the Service. The Customer keeps all rights in its tasks, inputs and, as between the parties, in the outputs it obtains, subject to the terms shown for each tool.
14. Liability
Nothing limits liability for wilful misconduct or gross negligence, or where the law does not allow limitation. Otherwise, Ametyst's total liability in any 12-month period is limited to the amount the Customer paid to Ametyst in that period, and Ametyst is not liable for loss of profit, loss of data or indirect damage.
15. Term and termination
These Terms apply while the Customer has an account. The Customer may close its account at any time. Ametyst may terminate for material breach, or on 30 days' notice for convenience; in the latter case paid, unused credits are refunded.
16. Changes to these Terms
We may update these Terms. Material changes are notified to account admins by email at least 15 days before they apply.
17. Governing law and jurisdiction
Italian law. For Business Customers, exclusive jurisdiction: the Court of Milan. For Consumers, the courts of the Consumer's place of residence or domicile, and any mandatory choice-of-law rules of the Consumer's country apply.
18. Consumers: withdrawal and how these Terms apply to you
18.1 Credits: no right of withdrawal. Credits are digital content delivered to your account immediately after payment. By completing a purchase you expressly request immediate delivery and acknowledge that, once the credits are delivered, you lose your right of withdrawal under article 59(o) of the Italian Consumer Code and the corresponding rules of the EU Consumer Rights Directive. Purchases of credits are therefore final also for Consumers. Billing errors are always corrected (see the Refund Policy).
18.2 Plans. A monthly Plan renews automatically; you can cancel at any time from Settings, with effect at the end of the paid month. We remind you by email before each renewal where the law requires it.
18.3 Pro: right of withdrawal. If you subscribe to Pro as a Consumer, you can withdraw within 14 days from your first subscription, without giving a reason, by writing to support@ametyst.ai. By subscribing you ask us to start the service at once: if you withdraw, we refund the fee you paid, less the part that covers the days Pro was active. The right applies to the first subscription, not to its renewals.
18.4 Clauses that do not apply to Consumers. Clause 14 (liability limits) does not limit our liability towards Consumers for damages caused by our fault; clause 9 applies to Consumers only to the extent permitted by law; clause 16 changes apply to Consumers only from the first renewal or purchase after the notice.
18.5 Disputes. You can contact us at support@ametyst.ai; if we cannot resolve a dispute, you may use the out-of-court dispute resolution bodies available in your country of residence.