NatscopeWeb UI for NATS JetStream

Stored messages arrive newest first, with paging in both directions. Filters narrow the list by subject pattern, payload text, start sequence or timestamp.

Click a row and the side panel shows headers, timing and the payload. When a Protobuf mapping matches the subject, the payload renders as JSON.

The same payload as raw text, hex or Base64 when you need to see the exact bytes on the wire.

Flip the toolbar from History to Realtime and messages stream in as they arrive. A display-rate limit keeps a busy queue readable without slowing the subscription.

Change a stream in place. Saving shows a field-level diff before anything reaches the server. Purge, seal and delete sit under the same tab, each behind a confirmation.

A form with every config field, or a JSON view that takes a full JetStream config document.

Full screen

Point Natscope at a Git repository, a local directory or an uploaded set of .proto files. It compiles them, resolves buf.lock dependencies and names the file and line when something fails.

Bind a subject pattern to a message type, wildcards included. Each mapping reports its own health, so a missing type shows up in the list instead of failing at decode time.

With a source and a mapping in place, the binary payload in the message viewer turns into JSON. Edit a watched .proto on disk and running tails re-decode with the new schema without reconnecting.

Full screen

Field autocompletion and live validation against the resolved message type. Add NATS headers as key/value pairs and send with Cmd+Enter.

Keep a draft as a template with its subject, message type, body and headers. Load it back from the Templates dropdown on any stream.

Every publish is logged with its subject, encoding, payload and result. Load an entry back into the form, or copy its payload.

Full screen

Pull and push, durable and ephemeral. Create one, edit it with a config diff, pause it until a chosen time, or copy it as a nats consumer add command.

Browse buckets and keys. Writes are compare-and-set on the revision you loaded, and History lists every put, delete and purge of a key.

Upload and download objects, delete them, and seal a bucket when it should stop accepting writes.

Full screen

Keep as many NATS endpoints as you need with user/pass, token, NKey or credentials auth, plus TLS or mTLS. Test the round trip before you connect.

Export connections, proto sources, mappings, templates and settings as one JSON file and import it on another machine. Secrets never leave the vault.

Paging, live tail, density, timestamp format and per-action confirmations, saved on the backend so they follow you across browsers.

Full screen