Multi-broker in one workspace
Connect several brokers at once and monitor or search them together—compare devices or environments without hopping windows.
Products/ Topic Bench Pro
Topic Bench Pro
The MQTT explorer built from daily broker work
Fast multi-broker monitoring, search, publish, and sticky watch views—made for instrumentation people, IoT control builders, and anyone who lives in MQTT traffic.
Pro unlocks MCP for your agent, topic & payload simulation, scenario playback, combined multi-topic graphs, bookmarks, color rules, themes, and tree import/export.
$25 off
$25 off for a short written testimony about why you use Topic Bench — contact us to claim.
The story
Built because the tools didn’t match the job.
Mike built Topic Bench because he uses MQTT brokers every day—and didn’t have the explorer he wanted. Easy navigation. Multiple brokers in one workspace. Simulating data. Highlighting and searching content. Rearranging windows. Seeing multiple trees at once.
Features came from daily needs building applications and controls with MQTT—not from a feature checklist. If you work instrumentation over MQTT, test or build IoT control systems, or just want a fast, efficient, good-looking explorer that handles many brokers, this is for you.
Search & highlight
Find topics and payloads across brokers instantly. Apply the same filter to stickies so pinned watch lists stay in sync.
Sticky watch views
Pin important topics while you browse—value, graph, or raw—so signals stay in front of the tree.
Keyboard-first navigation
Full shortcuts—F1 / ? help, panel toggles, search focus—so power users stay on the keyboard.
Sticky topics — grouped by broker.
Live topic tree — browse hierarchy across connected brokers.
Free capabilities
Everything you need for everyday multi-broker MQTT work.
Open-source baseline—profiles, live trees, search, publish, stickies, and keyboard-first navigation.
- Simultaneous multi-broker connections with colored, reorderable profiles
- Multi-broker profiles — hosts, TLS/WSS, credentials in the OS keyring
- Live topic tree with wildcards (+ / #), message counts, and update flash
- Search across topics and payloads—optionally apply filters to stickies
- Publish with QoS / retain, recent history, and JSON / plain-text inspect
- Shared sticky board — pin value, graph, or raw across profiles
- Full keyboard shortcuts & navigation (F1 / ? help)
- Windows x64 and Linux x64 community builds
Pro in action
See what Pro unlocks
Four workflow tools that make multi-broker MQTT monitoring faster to read, replay, and return to.
Pro
Combined graphs
Overlay multiple channels into a single time-logged graph—correlate data across topics, and even across brokers.
Pro
Simulation
Populate MQTT data by publishing. Auto-create a simulation from recorded sessions to replicate datasets—with the best prediction chosen automatically.
Pro
Color rules
Highlight data in your topic tree from payload matches, topic matches, and individual values inside payloads.
Pro
Bookmarks
Jump anywhere in a tree and auto-expand that topic for immediate access.
Video highlights
Watch Pro workflows
Short demos of scenario playback with color rules, simulation with MCP, and themes—click a still to play full-width.
Topic Bench Pro
Pro capabilities
Paid extras for teams that outgrow the free explorer—same app, unlock Pro when you need them.
MCP server
Connect, subscribe, publish, and wait from Cursor / CI against live sessions.
Topic & payload simulation
Generators and formulas for whole payloads or JSON fields—populate brokers for tests and demos.
Record → simulate
Capture live traffic, then suggest Simulate rows from the tape.
Scenario player
Sequenced, timed multi-topic publish scripts for demos and repeatable checks.
Combined multi-topic graph
Shared time axis across Graph stickies—correlate streams across topics and brokers.
History scrubber
Scrub per-topic history in the Payload panel—step through samples by receive time.
Topic bookmarks
Jump list into deep trees—auto-expand that topic for immediate access.
Custom color rules
Paint tree rows by topic / payload predicates and values inside payloads.
Topic tree export & import
JSON hierarchy out; republish onto a target broker for handoff or lab setups.
CSV recording
Time-series dumps for Excel and offline analysis.
Themes
Pick a theme to color the app to your liking—use one that fits your screens and environment so it’s easy on the eyes.
Buy Topic Bench Pro via Square on this page.
Themes
Pick a theme for your screens and environment—easy on the eyes.
Also available
Free open-source community edition
Topic Bench stays free on GitHub for everyday multi-broker monitoring—the open-source baseline Pro builds on.
- Multi-broker profiles, subscribe/publish, search, TLS / client certs
- Live topic tree, sticky pins (value / graph / raw), keyboard shortcuts
- Always free & open source on GitHub
Topic Bench Pro
Ready for Pro? Buy online, or contact Mike if you have questions before you purchase.