SYS.01 // LOCAL-FIRST MIRROR

X to Nostr

Mirror your original X posts to Nostr from this device. Your Nostr key stays local and encrypted.

Runs locally Encrypted key No analytics Free to use

SYSTEM STATUS

Setup needed

Setup Progress

Finish each step to start syncing.

1
Connect X account
Authorize the local app once.

Needed
2
Save encrypted Nostr key
Keep your signer protected locally.

Needed
3
Add relay URLs
Choose where posts publish.

Waiting
4
Run test sync
Verify the flow before background sync.

Waiting
5
Enable background sync
Let this device keep checking.

Optional

Complete these steps once. After that, the app can keep syncing in the background.

X Account

Connect once. Tokens stay on this device.

Nostr Signer

Save your key securely. The raw key is never shown after saving.

Nostr private key Paste your nsec or 64-character hex key. It will be encrypted on this device.

Relays

Choose where your mirrored posts are published.

Relay URLs Add one relay per line. Use wss:// or ws://.

Relay strategy

Primary relays Backup relays Disabled relays

Sync Control

Run a test first, then enable background sync.

Poll interval Minimum 15 seconds. 60 seconds is recommended.

Publish mode

Latest, then new posts Post your latest X post now, then keep posting new ones automatically. Only new posts from now on Skip old posts and start mirroring after this setup point. Newest posts up to a limit Use this when you want to limit catch-up publishing after missed syncs.

Maximum posts per run

Last checked

Never

Last synced

Never

Last post

None

Last issue

None

Stats

Stored locally only. Nothing is sent to analytics services.

0Posts mirrored

0Successful syncs

0Failed syncs

0Duplicate skips

100%Relay success rate

NeverLast success

NeverLast failure

0.0.0App version

0 / 0Relay success / failure

Content Settings

Choose how each mirrored Nostr note is written.

Template Available fields: {text}, {url}, {username}, {postId}

Preview will appear here.

Queue

Posts wait here before publishing. Failed posts retry with backoff.

0 pending 0 publishing 0 published 0 failed

No queued posts yet. Run a test sync to add the latest eligible X post.

Ready.

Connect X, save your Nostr key, add relays, then run a test sync.

Recent Activity

Plain-language sync and setup events.

No activity yet. Connect X and run a test sync to begin.

Advanced Details Technical output for troubleshooting.

{}

Export / Import

Advanced: back up your local settings as an encrypted file. Keep the password safe; it cannot be recovered.

Encrypted backup (advanced)

Backup password Encrypted backup JSON

Do not share exported backups. They may contain encrypted account data.

Relay Health

Primary relays are tried first. Backup relays fill in when needed.

No relay health data yet. Save relays and run a test sync.