DeepDeck
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01SIMPLE

DeepDeck is an open-source, local AI workbench.

The desktop client for DeepSeek Harness.

Workspaces, modes, models, and the prompt all fall into one natural flow. DeepDeck keeps existing Harness settings and extensions compatible; after guided first-run setup, it is ready for work.

Download DeepDeck View on GitHub
Now available: Browser + WebMCP
DeepDeck Local
The focused DeepDeck desktop interface
02WEBMCP

Available now

Let agents learn a site. Keep what works.

You set the goal. The Agent explores and uses the website, then saves verified workflows as WebMCP tools for future tasks. No need to teach it every click: existing products become easier for agents to work with.

Download latest

For Apple Silicon and Intel Macs.

Use the website. Save the experience.

Asking an Agent to build WebMCP is like asking it to use a website and preserve what it learned: how to search, read results, or edit and check a draft. That experience lives in inspectable, executable tools future tasks can reuse. You provide the goal; the Agent discovers the method, verifies the result, and keeps the operations that work.

  1. Explore the site
  2. Try the workflow
  3. Verify the result
  4. Save as tools
  5. Reuse next time

What is WebMCP?

WebMCP is a proposed web API: websites expose JavaScript functions or HTML forms as tools with natural-language descriptions and structured parameters. Agents can discover what a site does, understand the inputs it needs, and call tools in the current page, sharing the user's interface and browser context.

Explore the WebMCP project
  1. 01

    Reuse existing WebMCP

    Open a website and find its Website tools in Site Agent’s WebMCP tab. Switch to Use, describe your task, and the Agent can call the capabilities the site already provides.

  2. 02

    Quickly add WebMCP to a website

    No tools yet? Open WebMCP Builder or switch to Builder and describe your goal. The Agent explores the site, tries its workflows, and saves verified operations as tools. No step-by-step manual, site source changes, or separate MCP server required.

DeepDeck automatically discovers the search_openai WebMCP tool on openai.com

Discover tools the website already offers

On openai.com, DeepDeck automatically discovers search_openai and lists it under Website, ready for the Agent to use.

The X Site Agent in Builder mode reports WebMCP tool creation and verification

The Agent explores, uses, and verifies

On X, set a goal such as search, post reading, or draft editing. Builder explores the live page, tries the workflows, and checks which operations accomplish the task.

The WebMCP tab lists 23 tools for X under Built with DeepDeck

Save the experience as reusable tools

This X example saves verified operations as 23 tools under Built with DeepDeck. Enabled tools load when you return, with source inspection and version rollback available.

Use mode calls WebMCP to prepare a Hello world draft on X without publishing it

Switch to Use and describe your task

Ask “compose a hello world x post” and the Agent calls WebMCP to prepare a Hello, world! 👋 draft. The post is not published; filling and submitting are separate actions.

Clearer capabilities. Faster actions. Fewer tokens.

Computer use typically involves repeated screenshots or page snapshots, finding controls, clicking, and typing. WebMCP describes actions such as search, read a post, or edit a draft as tools the model can call with explicit arguments and read the results.

  • Understand the website

    Tool names, descriptions, and parameters tell the model what the website can do and how to use it.

  • Work faster with fewer tokens

    For tasks covered by tools, fewer page inspections, control lookups, and interaction rounds can reduce execution time and token use.

  • Keep experience for the next task

    Operations the Agent has verified become tools it can call again, helping existing products become easier to use through an agent.

Results depend on the website, tool design, and task. The Agent can still combine tools with browser interaction when needed.

03APP SUPPORT

Supports Apps.

A DeepDeck App is an installable extension with its own window, settings, and AI conversations. Hacker News Reader is a complete example.

Reading, search, sign-in, and AI Actions such as Explain and Summarize all live inside the same App.

04APP SHOWCASE

Apps in action.

An App brings one focused way of working into DeepDeck: a dedicated window for the interface, a Workspace for context, and an Agent at the moments that need reasoning.

The DeepDeck Hacker News Reader App with reading and AI actions
READING + RESEARCHINSTALLABLE

Hacker News Reader

Browse live feeds, search stories, follow complete discussion trees, and ask the Agent to explain or summarize any story, comment, or selection.

  • Live feeds
  • Full threads
  • Explain / Summarize
Install this App View source
The Video Sherlock evidence console for long-running video investigation
LONG-RUNNING INVESTIGATIONINSTALLABLE

Video Sherlock

Turn long-form video investigation into a trackable case, watch work progress, and return to key moments on an evidence timeline.

  • Visible progress
  • Evidence timeline
  • Structured artifacts
Install this App View source

Each App can own its settings, credentials, canonical Harness Sessions, and a source-bound Creator Workspace.

05INSTALL

Install an App in minutes.

No terminal required. DeepDeck inspects the source, package identity, and build command first, then installs only after you approve the plan.

  1. 01
    Download DeepDeck

    Install the latest release and complete first-run setup.

  2. 02
    Open Apps settings

    Go to Settings → Apps and find the install control.

  3. 03
    Choose and paste a source

    Pick either open-source App below and paste its Git address.

  4. 04
    Inspect and confirm

    Choose Inspect source, review the build plan, then Confirm install and restart when prompted.

APP SOURCE

Choose an open-source App and paste its Git address into Install an App plugin

Hacker News Readerhttps://github.com/jo32/dsh-hackernews-reader.git
Video Sherlockhttps://github.com/jo32/dsh-video-sherlock.git

After restart, open the newly installed App from the Apps sidebar.

Download DeepDeck first
BUILD YOUR OWN

Develop from source—or make an App of your own.

Settings → Apps → New App generates a complete Cordis Host / Client starter. Developers can also build and mount a public App source manually.

Read the Apps protocol
Developer: manual install example
git clone https://github.com/jo32/dsh-hackernews-reader.git
cd dsh-hackernews-reader
pnpm install --frozen-lockfile
pnpm check && pnpm test && pnpm build
dsh plugin --profile web add "$PWD"

Run the final command against a DeepDeck-managed web profile so the required App runtime is present.

06VIBE APP

Vibe an App.

Vibe Coding is DeepDeck's AI-assisted app-building workflow. Open it from Hacker News settings to bind the source workspace; describe a change, and the Agent writes code while Bun and Cordis rebuild and hot-reload it.

  1. 1Open CreatorThe source workspace is bound automatically
  2. 2Describe the ideaThe Agent edits the App directly
  3. 3Build and hot-reloadNo DeepDeck restart required
HACKER NEWS / SETTINGSOpen Creator from Vibe Coding
The Vibe Coding entry point in Hacker News App settings
CREATOR / REBUILDThis real build completed in 2007ms
Creator completing the Hacker News App Bun build and hot reload
THAT'S DEEPDECK.

Work simply.
Turn ideas into Apps.

Work, browse, and build. One desktop.

Download DeepDeck
07CHANGELOG

What’s new in DeepDeck.

New capabilities, meaningful improvements, and how to use them. Development previews and published features are labeled separately.

Released

V1.0.38 / BROWSER / WEBMCP

Browser + WebMCP is now available.

Use the Site Agent and WebMCP Builder in v1.0.38 to turn reading, search, editing, and sign-in workflows into reusable website tools.

  • Signed and notarized installers for Apple Silicon and Intel Macs, with in-app updates for existing users.
  • Builder discovers inputs, drafts, and sign-in controls. The Agent reads, edits, fills, and checks, with submission as a separate action.
  • Detect draft and target changes before editing. The Agent continues through native browser input when needed and verifies the page result.
Download latest View source
Development preview

BROWSER / WEBMCP

A dedicated Agent for your websites.

Browser and WebMCP Builder bring the conversation alongside the page, turning discovered website capabilities into tools you can use again.

  • Each website keeps its own Agent conversation, with Use and Builder in the same thread.
  • Discover existing WebMCP tools first. Builder creates missing tools with typed parameters; Apply verifies registration and saves them for that site.
  • Cover sign-in, search, and draft editing. The Agent reads, edits, fills, and checks the result, with filling separate from submitting.
Explore WebMCP View source

This entry describes the source preview before its installer release.