Streams

The sidebar lists every JetStream stream on the connected server. Selecting one opens a stream view with five tabs: Messages, Config, Consumers, Relations and Publish.

You can create a stream, edit its config, purge it, seal it and delete it without dropping to the nats CLI.

Find and arrange streams

The sidebar loads only stream names, so it stays quick with thousands of streams. It shows the first 12; Show more reveals 50 more at a time. The same tools work in the KV Stores and Object Store sections.

• Filter narrows the list to names that contain the text you type.
• The star next to a name pins it to the top of the section.
• Drag a name to reorder it, or focus it and press Alt+↑ / Alt+↓. Reordering is off while a filter is active. Reset to A–Z order in the list menu drops the manual order and keeps your pins.

Pins and order are saved per connection in Natscope's own database, so they survive reloads and restarts. Deleting the connection removes them.

Create a stream

Click the + next to Streams in the sidebar, or open /streams/new. The Create New Stream page offers two editing modes:

• Form View: every config field as a form control
• JSON View: paste or edit the raw stream config

The form covers the name and subjects, retention policy, storage backend, limits, replicas, discard policy, compression and the advanced flags (deny delete/purge, allow direct, rollup, per-message TTL). The JSON view accepts a full JetStream config document. Click Create Stream when you are done.

Newer JetStream options

Option	Needs	Notes
Allow Per-Message TTL	NATS 2.11+	Can be switched on later, never off
Delete Marker TTL	NATS 2.11+	Leaves a marker when Max Age removes a subject's last message; not on mirrors
Atomic Publish	NATS 2.12+	Batch publishes that commit together
Counter Stream	NATS 2.12+	Set at creation only; every message carries Nats-Incr
Allow Message Schedules	NATS 2.12+	Can be switched on later, never off; no sources or mirror
Persist Mode: Async	NATS 2.12+	Set at creation only; file storage, one replica
Allow Fast Batch Publish	NATS 2.14+	High-throughput batch publishing

Natscope reads the server's JetStream API level when it connects. An option the server cannot handle stays visible but disabled, and its hint names the NATS version it needs. Server information in the header lists what the connected server supports.

Inspect and edit config

The Config tab shows the current stream configuration and lets you edit it in place. Saving opens a diff first: Confirm Stream Configuration Changes lists exactly which fields change before anything reaches the server.

Relations

The Relations tab draws how messages move between streams, with the open stream highlighted. Upstreams sit on the left and data flows to the right:

• Source (orange): a stream collects messages from one or more streams, optionally filtered or with subject transforms.
• Mirror (blue): a stream keeps an exact copy of another one, sequence numbers included.
• Republish (violet): a stream republishes stored messages to a subject. The link points at every stream whose subjects capture that subject, or at the subject itself when none does.

Each card shows the stream's messages, size, subjects, replicas, storage, retention and consumers. Click a card to center the graph on that stream. KV and object store buckets appear as their KV_ and OBJ_ streams.

Click a link's label for its details: filter subjects and transforms, start sequence or time, the external API for cross-account or cross-domain links, lag, when the upstream was last heard from, and the last error the server reported. A red dashed link has an error; a dashed link has never reached its upstream. Drag the details panel by its header to move it, double-click the header to dock it again, and press Esc to close it.

Some upstreams cannot be shown as streams:

• A dashed card with a globe is a stream in another account or JetStream domain.
• A red card is a source or mirror whose stream does not exist on this connection.

Depth limits how many links away from the open stream the graph reaches. Click a type in the legend to hide its links. Drag or use the arrow keys to pan. Scroll or press + and - to zoom, and press 0 to fit the graph.

Purge, seal, delete

The Config tab holds the destructive actions:

• Purge: drop messages, keep the stream. Purge everything, or scope it by subject, by sequence, or to keep the last N messages.
• Seal: make the stream read-only for good
• Delete: remove the stream

Each one asks for confirmation. Irreversible operations keep type-to-confirm even after you disable the other prompts. See Settings.

Copy as nats CLI

The Config tab has a Copy as nats CLI action that turns the current stream configuration into a ready-to-paste nats stream add command. Use it to script the same stream elsewhere, or to file the config in a repo.