DeepDeck
DeepDeck is an open-source macOS desktop client for DeepSeek Harness that turns websites into reusable WebMCP tools.
If your agent work keeps re-solving the same website, DeepDeck's Builder is the part worth your afternoon: it saves verified operations as callable, inspectable tools instead of another throwaway script. The Figma and Blockbench demos are real editable artifacts, not screenshots. Pick it if you're on macOS and already in DeepSeek Harness; skip it if you need Windows, Linux, or a managed multi-user console.
Verified 4d ago · liveness 61/100 · cite: rightaichoice.com/tools/deepdeck
- Developers running DeepSeek Harness who want a local desktop workbench instead of terminal-only tooling
- Agent builders who want to save verified website workflows as reusable WebMCP tools
- Researchers doing long-form video investigation with a trackable evidence timeline
- macOS users who prefer local, inspectable open-source tooling over hosted agent platforms
- Windows or Linux users — the download is listed for Apple Silicon and Intel Macs only
- Anyone needing a hosted multi-user SaaS with an admin console and SSO
- Non-technical users who want a turnkey product with vendor support
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Skip DeepDeck if you work on Windows or Linux, or if you want a hosted multi-user agent platform with an admin console rather than a local macOS app you run and maintain yourself.
DeepDeck is open-source software, so the real bill is your DeepSeek model usage and token spend while the Agent explores and verifies a site during Builder runs
DeepDeck is distributed as open-source software for macOS, so the comparable line item is your DeepSeek model spend while the Agent explores and verifies workflows, not a seat licence. Against hosted computer-use agent platforms that bundle model usage into a subscription, DeepDeck shifts cost to your own usage and adds the maintenance cost of keeping saved WebMCP tools current when target sites change. Against a plain terminal setup on Harness, it adds a GUI layer at no licence cost but still
In short
DeepDeck — DeepDeck is an open-source macOS desktop client for DeepSeek Harness that turns websites into reusable WebMCP tools. Best for Developers running DeepSeek Harness who want a local desktop workbench instead of terminal-only tooling, Agent builders who want to save verified website workflows as reusable WebMCP tools, Researchers doing long-form video investigation with a trackable evidence timeline. Free to use.
What's new in DeepDeck
Checked 2 days agoAcross the latest 2 updates: 2 news mentions.
What should we open source in the age of AI?
A DeepDeck field note argues that task definitions, benchmarks and acceptance criteria deserve more open-source attention now that implementations are easier to generate.
How I use benchmarks to improve an agent
DeepDeck traced repeated tool-argument errors in MiMo back to the DeepDeck interface, changed it, and retested errors, time, steps and cost.
What people actually say about DeepDeck — is it worth it?
We scanned public community sources for DeepDeck on Aug 31, 2026 and could not establish that the discussion we found is about this tool rather than something else sharing its name. Our own analysis of that scan says the posts were off-subject. Rather than publish a sentiment score built on the wrong subject, we publish nothing here and re-run the scan.
Viability Score
How well maintained and how widely used is DeepDeck? Built from what the vendor actually publishes (docs, changelog, tutorials, integrations, pricing), whether the site is live, and how much real users discuss it. How we calculate this
Last calculated: October 2026
How we score →Key Features
- Open-source local AI workbench and macOS desktop client for DeepSeek Harness
- WebMCP: discover and call website-exposed tools as structured functions
- WebMCP Builder mode: Agent explores a site, verifies workflows, and saves them as reusable tools
- Site Agent WebMCP tab lists a site's existing tools under Website
- Source inspection and version rollback on saved WebMCP tools
- Combines WebMCP tool calls with browser interaction for tasks tools don't cover
- Installable App extensions with their own window, settings, credentials, and AI conversations
- Hacker News Reader App with live feeds, full threads, search, sign-in, and Explain/Summarize
- Video Sherlock App for long-form video investigation with an evidence timeline
- App install approval flow that inspects source, package identity, and build command
- Canonical Harness Sessions and source-bound Creator Workspace per App
- AI Actions such as Explain and Summarize on stories, comments, and selections
- Guided first-run setup with no terminal required
- Compatible with existing DeepSeek Harness settings and extensions
- Native app for Apple Silicon and Intel Macs
About DeepDeck
DeepDeck is the open-source desktop client for DeepSeek Harness, shipping as a native macOS app for Apple Silicon and Intel machines. It keeps your existing Harness settings and extensions compatible, and guided first-run setup gets you to a working workbench without touching a terminal. The audience is developers, agent builders, and researchers who want a local, inspectable client rather than another hosted agent platform. The headline capability is WebMCP, a proposed web API where sites expose JavaScript functions or HTML forms as tools with natural-language descriptions and structured parameters. Site Agent's WebMCP tab lists what a site already offers — on openai.com it discovers search_openai under Website — and the Agent calls those tools directly instead of screenshot-clicking through a UI. Builder mode is the more interesting half: describe a goal, let the Agent explore the live site and verify which operations actually accomplish the task, then save them as reusable tools. The vendor's X example saves 23 verified tools under 'Built with DeepDeck,' each with source inspection and version rollback. The demos go beyond pattern-matching. On Figma, where Figma's own Agent said it couldn't edit vector shapes yet, DeepDeck + WebMCP produced a 360 × 360 editable vector OpenAI logo on a new page; on Blockbench it built a ginger cat 3D project with grouped body, head, ears, paws, and tail. Two Apps ship with it: Hacker News Reader bundles live feeds, full comment threads, search, sign-in, and Explain/Summarize actions; Video Sherlock turns long-form video investigation into a trackable case with an evidence timeline. Apps install only after you approve a plan that inspects source, package identity, and build command, and each can own its settings, credentials, canonical Harness Sessions, and a source-bound Creator Workspace. Where it lands versus alternatives: computer-use agents drive a site but rarely keep what they learned. DeepDeck runs both approaches
Behind the Verdict
The pitch that lands is persistence. Most computer-use agents re-derive a site every session — read page, hunt for the search field, click, type, read again. DeepDeck runs that loop once to verify a workflow, then freezes the working operations as WebMCP tools that later tasks call with arguments. That's a materially different economics story, and the vendor is refreshingly blunt that the savings aren't automatic: they depend on the site, how the tools are designed, and the task. When to pick it. You're on macOS, you already run DeepSeek Harness, and you have recurring site workflows worth saving — reading and searching a research site, drafting but not publishing on social, editing in a design tool. Builder mode plus version rollback means a saved tool is something you can inspect and revert, not a black box. When to pass. You're on Windows or Linux — the download is Apple Silicon and Intel Macs only. You need a hosted, multi-user deployment with an admin console. You want a turnkey product you can hand to a non-technical teammate; this is developer tooling with a first-run setup, not a polished consumer app. Watch the failure mode. Saved tools are bound to site structure, so a redesign can quietly break an automation you rely on. Budget time for re-verifying tools after a site ships changes, and don't build your critical path on an untested Builder output. The closest alternative is a generic computer-use agent, which explores a page capably but throws the learning away. DeepDeck's answer is to keep both modes available and layer tools on top, which is the more useful architecture if you'll actually revisit the site. One practical note from the vendor's own writing: they traced repeated tool-argument errors in MiMo back to the DeepDeck interface, changed it, and
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Real-world workflow fit
Concrete scenarios for the personas DeepDeck actually fits — and what changes day-one when you adopt it.
You open a site in Site Agent's WebMCP tab and DeepDeck discovers an existing tool such as search_openai under Website. You switch to Use, describe the task, and the Agent calls the tool with your arguments rather than clicking through the page.
Outcome: The task runs through a declared tool with a known input schema instead of repeated page reads and control lookups, and you never leave the desktop client.
You open WebMCP Builder, describe your goal, and the Agent explores the live page, tries the workflows, and verifies which operations accomplish the task. You then save the verified operations as tools under Built with DeepDeck.
Outcome: You end up with reusable, inspectable tools — the vendor's X example saved 23 — that load automatically next time, with source inspection and version rollback available if something drifts.
You install the Video Sherlock App from the approval flow, which inspects package identity and build command before installing, then work the investigation as a tracked case.
Outcome: The investigation lives as a case with an evidence timeline in its own window with its own credentials and Harness Session, rather than scattered across browser tabs.
Use Cases
- Turn a repeated website workflow into a saved, callable WebMCP tool instead of re-clicking it every session
- Build reusable WebMCP tools for a site that exposes no tools of its own yet
- Read Hacker News feeds and full comment threads with Explain and Summarize actions in one window
- Track a long-form video investigation as a case with an evidence timeline
- Produce editable creative artifacts through the browser, such as a vector logo or a grouped 3D model
- Run a local, inspectable agent workbench on macOS without handing credentials to a hosted platform
- Audit and roll back saved agent tools when a target site changes
- Trace and fix recurring tool-argument errors in an agent workflow
Models Under the Hood
as of 2026-10-16
Limitations
- DeepDeck downloads for Apple Silicon and Intel Macs only, so Windows and Linux developers cannot run it.
- Tool-building costs time up front: the Agent has to explore the site and verify a workflow before anything is saved, and the vendor states that time and token savings depend on the site, tool design, and task.
- Saved tools are not fireproof — site changes may require tool updates, which can break an automation you already rely on.
- There is no hosted multi-user layer, admin console, or SSO; Apps are local extensions with their own settings, credentials, and Harness Sessions.
- App installs involve an approval step because DeepDeck inspects package identity, source, and build command first, which is the right call but adds friction when you install often.
as of 2026-10-02
Verification history
We have re-verified DeepDeck 4 times since . Each pass re-reads the vendor's own pages and re-checks every listed field against that evidence; passes where nothing had changed are marked as such.
- — re-checked, vendor evidence unchanged
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-checked, vendor evidence unchanged
Free to cite with attribution — this page re-verifies continuously.
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Where the pricing makes sense
The company stage and team size where DeepDeck's pricing actually pencils out — and where peers do it cheaper.
DeepDeck is distributed as open-source software for macOS, so the comparable line item is your DeepSeek model spend while the Agent explores and verifies workflows, not a seat licence. Against hosted computer-use agent platforms that bundle model usage into a subscription, DeepDeck shifts cost to your own usage and adds the maintenance cost of keeping saved WebMCP tools current when target sites change. Against a plain terminal setup on Harness, it adds a GUI layer at no licence cost but still
Setup time & first value
How long it actually takes to get something useful out of DeepDeck — broken out by persona, not the marketing-page minute.
Developers already on DeepSeek Harness: a guided first-run setup with no terminal required, and existing Harness settings and extensions carry over, so you avoid rebuilding a config. Agent builders adding WebMCP: minutes to start using a site's existing tools, but expect real exploration and verification time before your first saved tool set is trustworthy — the vendor is explicit that building
Switching to or from DeepDeck
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
- →From terminal-only DeepSeek Harness: install DeepDeck, which keeps existing Harness settings and extensions compatible, and work through the guided first-run setup
- →From generic computer-use agents: keep using browser interaction where you need it, then save the verified operations as WebMCP tools so the next run reuses them
- →From a separately maintained automation script: let WebMCP Builder explore and verify the workflow on the live page, then save those operations as tools with source inspection and version rollback
- →From scattered browser tabs for news reading: install the Hacker News Reader App so feeds, threads, search, sign-in and Explain/Summarize live in one window
- ↗To a Windows or Linux machine: DeepDeck ships for Apple Silicon and Intel Macs only, so you would need a different client for Harness
- ↗To a hosted multi-user agent platform: there is no admin console or SSO layer in DeepDeck's local App model
- ↗To hand-maintained scripts: saved tools can be inspected and rolled back, but site changes may still require you to update them
- ↗To a turnkey supported product: DeepDeck is open-source software you run and secure yourself
Resources & Guides
Tutorials & Learning
YouTube returned 6 videos for “DeepDeck”, and we withheld 6: 6 could not be judged, because “DeepDeck” is a single word that other videos use for other things. We are showing none, because we could not prove any of them are about DeepDeck.
Official links
Tools that pair well with DeepDeck
Common stack mates teams adopt alongside DeepDeck, with the specific reason each pairing earns its keep.
MarsX
Open-source dev platform that combines no-code, full-code, and AI with reusable full-stack MicroApps.
Continue
Open-source AI coding agent for VS Code and JetBrains — free to fork since Cursor acquired Continue in January 2026.
Inngest
Open source durable execution SDK: wrap functions in steps and get retries, flow control, and traces with zero infrastructure to run.
Featured Head-to-Head Comparisons
Deepdeck vs Dbos
If you need ready-to-modify AI apps and enjoy tinkering with code, DeepDeck is your free playground. If you're building production AI agents that must survive failures without adding new infra, DBOS is the pragmatic choice—especially if you're already on Postgres. For serious engineering, DBOS wins; for curiosity and customization, DeepDeck.
Deepdeck vs Bito
If you're a developer who wants to poke under the hood and build your own AI tools, DeepDeck is a free playground. But if your team lives in Cursor or Claude Code and you're watching token bills balloon, Bito is the cost-cutting layer you need — it routes to right-sized models and grounds requests in your codebase, cutting spend without sacrificing success. For enterprises with multi-repo sprawl, Bito's architectural planning and compliance features make it the clear winner, despite the opaque pricing.
Deepdeck vs Temporal Ai
If you're a developer who wants full control and customization, DeepDeck is a free playground of AI apps you can mold. But if you're building AI agents that must survive failures and you need battle-tested durability, Temporal AI is the clear choice—even with its freemium cost and complexity.
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