SERVER

umbriel

Rank #30,335

io.github.ObscuritySRL/umbriel

See and drive a whole Windows machine from Bun — apps, input, screen, OCR, registry, OS — via MCP.

8 versions

2 GitHub stars

by ObscuritySRL (2 servers)View repository ↗

First listed

Jun 18, 2026

Last publish date

Jun 27, 2026

PURPOSE

What you can do with umbriel

umbriel is a Model Context Protocol (MCP) server published by ObscuritySRL. It ranks #30,335 of 144,396 active servers on MCP Toplist, and its repository has 2 GitHub stars. umbriel is listed across 3 registries — Official MCP, PulseMCP and Glama, with 8 tracked versions. It was first listed on Jun 18, 2026 and most recently updated on Jun 27, 2026.

Not verifiedMCP Toplist has not yet written a checked profile for this server, so the paragraph above is assembled from registry data only. The repository README is the authority on what it does.

CAPABILITIES AND LIMITATIONS

What umbriel can and cannot do

Not verifiedMCP Toplist has not catalogued this server's tools or limitations. The repository README lists them.

REQUIREMENTS

What you need before using umbriel

DeclaredNo credentialsNo credentials declared

The registry listing declares no required environment variables or authentication. This is declared metadata, not a verified install — the repository README is the authority.

Declared by Glama, last synced Oct 16, 2026. Not independently verified by MCP Toplist.

Declared in the registry install config

UMBRIEL_PROFILE · optional
UMBRIEL_OS · optional
UMBRIEL_ALLOW · optional
UMBRIEL_DENY · optional
UMBRIEL_CURSOR · optional
UMBRIEL_FS_ROOT · optional
UMBRIEL_TRACE · optional
UMBRIEL_FFI_TRACE · optional
UMBRIEL_AUDIT · optional
UMBRIEL_REDACT · optional

INSTALLATION AND FIRST TASK

Connect umbriel and confirm it works

npm package

claude mcp add umbriel -e "UMBRIEL_PROFILE=<your UMBRIEL_PROFILE>" -e "UMBRIEL_OS=<your UMBRIEL_OS>" -e "UMBRIEL_ALLOW=<your UMBRIEL_ALLOW>" -e "UMBRIEL_DENY=<your UMBRIEL_DENY>" -e "UMBRIEL_CURSOR=<your UMBRIEL_CURSOR>" -e "UMBRIEL_FS_ROOT=<your UMBRIEL_FS_ROOT>" -e "UMBRIEL_TRACE=<your UMBRIEL_TRACE>" -e "UMBRIEL_FFI_TRACE=<your UMBRIEL_FFI_TRACE>" -e "UMBRIEL_AUDIT=<your UMBRIEL_AUDIT>" -e "UMBRIEL_REDACT=<your UMBRIEL_REDACT>" -- npx -y umbriel

Replace each placeholder with your own value before saving.

npm package

[mcp_servers.umbriel]
command = "npx"
args = ["-y", "umbriel"]

[mcp_servers.umbriel.env]
UMBRIEL_PROFILE = "<your UMBRIEL_PROFILE>"
UMBRIEL_OS = "<your UMBRIEL_OS>"
UMBRIEL_ALLOW = "<your UMBRIEL_ALLOW>"
UMBRIEL_DENY = "<your UMBRIEL_DENY>"
UMBRIEL_CURSOR = "<your UMBRIEL_CURSOR>"
UMBRIEL_FS_ROOT = "<your UMBRIEL_FS_ROOT>"
UMBRIEL_TRACE = "<your UMBRIEL_TRACE>"
UMBRIEL_FFI_TRACE = "<your UMBRIEL_FFI_TRACE>"
UMBRIEL_AUDIT = "<your UMBRIEL_AUDIT>"
UMBRIEL_REDACT = "<your UMBRIEL_REDACT>"

Add to ~/.codex/config.toml. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "umbriel": {
      "command": "npx",
      "args": [
        "-y",
        "umbriel"
      ],
      "env": {
        "UMBRIEL_PROFILE": "<your UMBRIEL_PROFILE>",
        "UMBRIEL_OS": "<your UMBRIEL_OS>",
        "UMBRIEL_ALLOW": "<your UMBRIEL_ALLOW>",
        "UMBRIEL_DENY": "<your UMBRIEL_DENY>",
        "UMBRIEL_CURSOR": "<your UMBRIEL_CURSOR>",
        "UMBRIEL_FS_ROOT": "<your UMBRIEL_FS_ROOT>",
        "UMBRIEL_TRACE": "<your UMBRIEL_TRACE>",
        "UMBRIEL_FFI_TRACE": "<your UMBRIEL_FFI_TRACE>",
        "UMBRIEL_AUDIT": "<your UMBRIEL_AUDIT>",
        "UMBRIEL_REDACT": "<your UMBRIEL_REDACT>"
      }
    }
  }
}

Add to claude_desktop_config.json (Settings → Developer → Edit Config). Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "umbriel": {
      "command": "npx",
      "args": [
        "-y",
        "umbriel"
      ],
      "env": {
        "UMBRIEL_PROFILE": "<your UMBRIEL_PROFILE>",
        "UMBRIEL_OS": "<your UMBRIEL_OS>",
        "UMBRIEL_ALLOW": "<your UMBRIEL_ALLOW>",
        "UMBRIEL_DENY": "<your UMBRIEL_DENY>",
        "UMBRIEL_CURSOR": "<your UMBRIEL_CURSOR>",
        "UMBRIEL_FS_ROOT": "<your UMBRIEL_FS_ROOT>",
        "UMBRIEL_TRACE": "<your UMBRIEL_TRACE>",
        "UMBRIEL_FFI_TRACE": "<your UMBRIEL_FFI_TRACE>",
        "UMBRIEL_AUDIT": "<your UMBRIEL_AUDIT>",
        "UMBRIEL_REDACT": "<your UMBRIEL_REDACT>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). Replace each placeholder with your own value before saving.

npm package

{
  "servers": {
    "umbriel": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "umbriel"
      ],
      "env": {
        "UMBRIEL_PROFILE": "<your UMBRIEL_PROFILE>",
        "UMBRIEL_OS": "<your UMBRIEL_OS>",
        "UMBRIEL_ALLOW": "<your UMBRIEL_ALLOW>",
        "UMBRIEL_DENY": "<your UMBRIEL_DENY>",
        "UMBRIEL_CURSOR": "<your UMBRIEL_CURSOR>",
        "UMBRIEL_FS_ROOT": "<your UMBRIEL_FS_ROOT>",
        "UMBRIEL_TRACE": "<your UMBRIEL_TRACE>",
        "UMBRIEL_FFI_TRACE": "<your UMBRIEL_FFI_TRACE>",
        "UMBRIEL_AUDIT": "<your UMBRIEL_AUDIT>",
        "UMBRIEL_REDACT": "<your UMBRIEL_REDACT>"
      }
    }
  }
}

Save as .vscode/mcp.json in your workspace. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "umbriel": {
      "command": "npx",
      "args": [
        "-y",
        "umbriel"
      ],
      "env": {
        "UMBRIEL_PROFILE": "<your UMBRIEL_PROFILE>",
        "UMBRIEL_OS": "<your UMBRIEL_OS>",
        "UMBRIEL_ALLOW": "<your UMBRIEL_ALLOW>",
        "UMBRIEL_DENY": "<your UMBRIEL_DENY>",
        "UMBRIEL_CURSOR": "<your UMBRIEL_CURSOR>",
        "UMBRIEL_FS_ROOT": "<your UMBRIEL_FS_ROOT>",
        "UMBRIEL_TRACE": "<your UMBRIEL_TRACE>",
        "UMBRIEL_FFI_TRACE": "<your UMBRIEL_FFI_TRACE>",
        "UMBRIEL_AUDIT": "<your UMBRIEL_AUDIT>",
        "UMBRIEL_REDACT": "<your UMBRIEL_REDACT>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json. Replace each placeholder with your own value before saving.

npm package

{
  "mcpServers": {
    "umbriel": {
      "command": "npx",
      "args": [
        "-y",
        "umbriel"
      ],
      "env": {
        "UMBRIEL_PROFILE": "<your UMBRIEL_PROFILE>",
        "UMBRIEL_OS": "<your UMBRIEL_OS>",
        "UMBRIEL_ALLOW": "<your UMBRIEL_ALLOW>",
        "UMBRIEL_DENY": "<your UMBRIEL_DENY>",
        "UMBRIEL_CURSOR": "<your UMBRIEL_CURSOR>",
        "UMBRIEL_FS_ROOT": "<your UMBRIEL_FS_ROOT>",
        "UMBRIEL_TRACE": "<your UMBRIEL_TRACE>",
        "UMBRIEL_FFI_TRACE": "<your UMBRIEL_FFI_TRACE>",
        "UMBRIEL_AUDIT": "<your UMBRIEL_AUDIT>",
        "UMBRIEL_REDACT": "<your UMBRIEL_REDACT>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

First successful task

After adding the config, ask your client to list this server's tools. A tool list confirms the connection; an empty list or an error means the server did not start or needs credentials.

ALTERNATIVES

When to choose another server

Other servers by ObscuritySRL

Bun Win32#2,859

View all ObscuritySRL servers →

No task-specific alternatives are catalogued for umbrielyet; the list above is its publisher's other servers.

MAINTENANCE AND EVIDENCE

What changed, and when this was checked

First listed: Jun 18, 2026
Latest version published: Jun 27, 2026
Version history: 8 versions tracked (below)
Requirements evidence: Declared by Glama, last synced Oct 16, 2026. Not independently verified by MCP Toplist.
Profile checked: Not yet — purpose, capabilities and requirements above come from registry data only
Ranking data as of: Oct 16, 2026

Registry sightings

Official MCP ↗listed since Jun 20, 2026 · still listed
PulseMCP ↗listed since Jun 20, 2026 · still listed
Glama ↗listed since Jul 31, 2026 · still listed

Do you maintain umbriel? to correct or enrich this profile.

VERSIONS

Available versions (8)

Version	Published
1.14.0	Jun 27, 2026
1.13.0	Jun 24, 2026
1.12.0	Jun 22, 2026
1.11.1	Jun 21, 2026
1.11.0	Jun 21, 2026
1.10.1	Jun 20, 2026
1.9.3	Jun 18, 2026
1.9.2	Jun 18, 2026

STANDING

#30,335of 144,396 active serversTop 25%

Ranks ahead of 114,061 of 144,396 servers on MCP Toplist.

BADGE

Show your rank

Maintain this server? Add the live rank badge to your README — it updates automatically as the leaderboard changes.

Markdown

[![MCP Toplist](https://mcptoplist.com/badge/io.github.ObscuritySRL%2Fumbriel.svg)](https://mcptoplist.com/server/io.github.ObscuritySRL%2Fumbriel)

HTML

<a href="https://mcptoplist.com/server/io.github.ObscuritySRL%2Fumbriel"><img src="https://mcptoplist.com/badge/io.github.ObscuritySRL%2Fumbriel.svg" alt="MCP Toplist: Top 25% of 144,396" /></a>

Variants: append ?metric=score or ?metric=stars to the image URL.

FAQ

Frequently asked questions

Who maintains umbriel?: umbriel is maintained by ObscuritySRL, which publishes 2 MCP servers (20 total versions) tracked on MCP Toplist.
Is umbriel listed on the Official MCP Registry?: Yes — umbriel is listed on the Official MCP Registry, alongside PulseMCP and Glama.
How many versions does umbriel have?: MCP Toplist tracks 8 versions of umbriel, most recently published on Jun 27, 2026.
Where can I find the source code for umbriel?: The source code for umbriel is hosted at github.com/obscuritysrl/umbriel.

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