Terms of Service

1. Scope and acceptance

These Terms of Service govern your access to and use of InterfaceKit. The service includes interfacekit.io, blog.interfacekit.io, guides.interfacekit.io, legal.interfacekit.io, agents.interfacekit.io, related API and preview endpoints, emails we send, interface libraries, downloads, documentation, and other features we make available. In these terms, “InterfaceKit,” “we,” “us,” and “our” refer to the operator of the InterfaceKit service.

By creating an account, obtaining protected content, using an agent access key, buying a plan, or otherwise using the service, you agree to these terms, the Acceptable Use Policy, and any order or plan terms shown to you at purchase. If you do not agree, do not use the service.

If you use InterfaceKit for a company or other organization, you represent that you have authority to bind that organization. In that case, “you” includes the organization.

2. Eligibility

You must be at least 16 years old and legally able to enter into these terms. If you have not reached the age of legal majority where you live, a parent or legal guardian must approve your use. You may not use the service if applicable law prohibits us from providing it to you.

3. Accounts and credentials

You must provide an email address you are authorized to use and keep your account information accurate. You are responsible for activity under your account and for promptly contacting humans@interfacekit.io if you suspect unauthorized access.

Passwordless sign-in codes, access tokens, and agent keys are credentials. You may provide an agent key only to people, employees, contractors, and trusted systems that are authorized to use your account. You may not sell credentials, publish them, place them in public client-side code, or allow unrelated third parties to use them.

We may rotate, limit, or revoke credentials when reasonably necessary to protect the service, enforce these terms, respond to legal requirements, or address suspected compromise.

4. The service

InterfaceKit provides structured references to interface foundations, components, blocks, states, documentation, and implementation examples. Features and access limits can differ by plan, environment, library, or resource.

The service is a reference and productivity tool. It does not replace your own design, engineering, accessibility, security, legal, or compliance review. You are responsible for testing and deciding whether any output is appropriate for your product and users.

5. License to InterfaceKit content

Subject to these terms and the limits of your plan, we grant you a limited, non-exclusive, revocable, non-transferable, and non-sublicensable license to use InterfaceKit content that we have the right to license to design, build, test, and maintain products for yourself or your organization.

You may modify that content for those products and allow your authorized employees and contractors to use it on your behalf. You remain responsible for their compliance with these terms.

You may not sell, sublicense, publish, mirror, or redistribute InterfaceKit content as a standalone library, design system, dataset, template collection, training corpus, reference catalog, agent service, or competing product. You may not make the service or substantial parts of it available for others to extract, and you may not remove ownership, license, or attribution notices.

No rights are granted by implication. Open source files or third-party materials included with the service remain subject to their own notices and licenses, which control if they conflict with this section.

6. Third-party products and rights

Some InterfaceKit libraries describe or reconstruct patterns associated with third-party products. Product names, logos, trademarks, trade dress, copyrighted material, and other rights belong to their respective owners. Unless we explicitly say otherwise, those owners do not sponsor, endorse, or affiliate with InterfaceKit.

Our license covers only rights that InterfaceKit or its licensors can grant. It does not grant you rights in a third party’s marks, content, data, patents, or other intellectual property. You are responsible for determining whether your use requires separate permission and for changing references, branding, content, and implementation details before release.

7. Acceptable use

You must comply with the Acceptable Use Policy and all applicable laws. You may not bypass authentication, evade rate limits or plan limits, disrupt the service, probe for vulnerabilities without written permission, misuse another person’s data or credentials, or use the service to infringe or violate another person’s rights.

We may apply reasonable technical limits to protect security, availability, and fair access. Attempts to avoid those limits are a material breach of these terms.

8. Automation and AI agents

Automated access is allowed only through routes we document and with valid credentials. You are responsible for software and AI agents that use your account, including their requests, outputs, and handling of credentials.

You must review generated or adapted output before production use. InterfaceKit does not guarantee that an agent will interpret a resource correctly or produce complete, secure, accessible, non-infringing, or production-ready code.

9. Plans, billing, and taxes

InterfaceKit may offer free and paid plans. If you purchase a paid plan, the price, currency, billing interval, included use, renewal terms, cancellation method, and any trial terms shown at checkout or in an order form become part of these terms.

A recurring plan renews for the period shown at purchase until canceled. Cancellation stops future renewal and does not normally create a refund for an already-started period, except where the purchase terms or applicable law require one. You remain responsible for charges incurred before cancellation and for applicable taxes.

We may change prices or plan features prospectively. We will provide notice required by law before a price change applies to an existing recurring plan. Merely displaying a plan or price does not require us to make checkout available in every location.

10. Your content and feedback

You retain ownership of content you send to us. You give us the limited rights needed to receive, process, and respond to that content and to operate the service you requested.

If you voluntarily provide product feedback, you allow us to use it without restriction or payment. We will not publicly identify you as its source without permission.

11. Our ownership

InterfaceKit and its licensors retain all rights in the service, including its software, visual design, documentation, original content, branding, and compilation of resources. Except for the licenses expressly stated in these terms, no rights transfer to you.

12. Privacy

The Privacy Policy explains how we handle personal information. The Cookies and Local Storage Notice explains current browser-storage practices. By using the service, you acknowledge those notices.

13. Service changes and third parties

We may add, modify, suspend, or discontinue features and may change technical limits. Where reasonably practical, we will give advance notice if a material change substantially reduces a paid feature during its current paid period.

The service depends on providers and may link to third-party sites. We do not control third-party services, and their terms and privacy practices apply to your direct use of them. Interruptions or changes at a provider can affect InterfaceKit.

14. Suspension and termination

You may stop using InterfaceKit at any time and may request account deletion by emailing humans@interfacekit.io. Deleting local browser data or stopping payment does not by itself submit an account-deletion request.

We may limit, suspend, or terminate access if you materially breach these terms, create security or legal risk, fail to pay an amount due, or threaten the service or other users. Where practical and appropriate, we will provide notice and an opportunity to correct the issue.

When access ends, your right to use the service ends. Provisions that should reasonably survive, including ownership, payment obligations, disclaimers, liability limits, indemnity, and general terms, remain effective.

15. Disclaimers

To the maximum extent permitted by law, the service and all content are provided “as is” and “as available.” We disclaim implied warranties, including merchantability, fitness for a particular purpose, title, non-infringement, and uninterrupted, secure, or error-free operation.

We do not warrant that content is complete, current, unique, lawful for every intended use, or compatible with every framework, agent, browser, or product. Nothing in the service is legal, tax, accounting, security, or compliance advice.

Some jurisdictions do not allow certain warranty exclusions. In those jurisdictions, exclusions apply only to the extent permitted.

16. Limitation of liability

To the maximum extent permitted by law, InterfaceKit and the service operator’s affiliates, personnel, and suppliers will not be liable for indirect, incidental, special, consequential, exemplary, or punitive damages, or for lost profits, revenue, data, goodwill, or business opportunities, arising from or related to the service.

To the maximum extent permitted by law, their total aggregate liability for all claims arising from or related to the service will not exceed the greater of the amount you paid InterfaceKit during the twelve months before the event giving rise to liability or US$100.

These limits apply regardless of the legal theory and even if a remedy fails of its essential purpose. They do not limit liability that cannot lawfully be limited, including any mandatory consumer rights.

17. Indemnity for business use

If you use InterfaceKit for a business or organization, then to the extent permitted by law you will defend and indemnify the InterfaceKit operator, its affiliates, and personnel against third-party claims, losses, and reasonable costs arising from your products, your content, your violation of these terms, or your infringement of another person’s rights. This obligation does not apply to the extent a claim was caused by InterfaceKit’s own unlawful conduct.

18. General terms

These terms, the policies they incorporate, and any applicable order terms are the entire agreement about the service. If an order form or signed agreement expressly conflicts with these terms, the signed agreement controls for that conflict.

If a provision is unenforceable, it will be enforced to the maximum lawful extent and the remaining provisions will continue. A failure to enforce a provision is not a waiver. You may not assign these terms without our consent, but we may assign them as part of a reorganization, financing, merger, acquisition, or transfer of the service.

Neither party is responsible for delay caused by events beyond its reasonable control, except for payment obligations. Any governing-law, forum, arbitration, or mandatory consumer rules in a signed agreement or checkout terms also apply. Where no enforceable choice exists, applicable law determines those questions.

Before filing a formal claim, please contact humans@interfacekit.io and provide enough detail for the parties to try to resolve it informally. This does not prevent either party from seeking urgent relief or exercising a right that cannot be waived.

19. Changes and contact

We may update these terms as the service, our business, or law changes. Updated terms apply prospectively from the stated effective date. We will provide additional notice or request renewed acceptance when required. If you do not agree to an update, you must stop using the affected service before it takes effect.

Questions about these terms can be sent to humans@interfacekit.io.