Terms of use

Last updated: August 2026

The short version

Xstr is a free tool that mirrors your X posts to Nostr and back. It's provided as-is, with no warranty. You own your content. X and Nostr are third-party services with their own rules. Be reasonable, and you're welcome here.

Who provides Xstr

Xstr is owned and operated by Econommi, Ltd., a Delaware corporation ("Econommi", "we"). "Xstr" in these terms means the service Econommi provides at xtonostr.com.

The service

Xstr connects your X account and your Nostr signer and publishes your posts between them on your behalf. It's offered free of charge. There is no paid tier and no guarantee of uptime — it may be unavailable, change, or stop at any time.

Your content

You own everything you post. By using Xstr you're asking it to republish your own posts to the destinations you connect. You're responsible for what you publish and for having the right to publish it.

Acceptable use

Don't use Xstr to break the law, to spam, to harass, or to abuse the X or Nostr networks. We may suspend or block access that harms the service or other people.

Third-party services

X (Twitter) and the Nostr relays you choose are independent services. Their availability, pricing, API access, and policies are outside Xstr's control and can change or be revoked at any time — which may interrupt mirroring. Xstr is not responsible for those services or for actions you take on them.

No warranty; limitation of liability

Xstr is provided "as is" and "as available", without warranties of any kind. To the fullest extent allowed by law, Econommi, Ltd. and the people who build and run Xstr are not liable for any loss arising from your use of the service — including missed, duplicated, or failed posts. Your content stays yours; keep your own backups of anything important.

Changes to these terms

These terms may be updated. Continuing to use Xstr after a change means you accept the updated terms. The "last updated" date above reflects the current version.

Governing law

These terms are governed by the laws of the State of Delaware, United States, without regard to its conflict-of-law rules.

Independence

Xstr is an independent tool. It is not affiliated with, endorsed by, or sponsored by X Corp or Twitter. "X" refers to the third-party service you choose to connect.