SERVER

SandBase Harness

Rank #447

io.github.sandbaseai/sandbase-harness

Stdio MCP bridge for SandBase Harness agents, sessions, turns, artifacts, and cancellation.

2 versions

639 GitHub stars

by sandbaseai (2 servers)View repository ↗

First listed

Aug 19, 2026

Last publish date

Aug 30, 2026

PURPOSE

What you can do with SandBase Harness

SandBase Harness is a Model Context Protocol (MCP) server published by sandbaseai. It ranks #447 of 144,396 active servers on MCP Toplist, and its repository has 639 GitHub stars. SandBase Harness is listed on Official MCP, with 2 tracked versions. It was first listed on Aug 19, 2026 and most recently updated on Aug 30, 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 SandBase Harness 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 SandBase Harness

DeclaredAPI keyCredentials declared

The registry listing declares required configuration before first use — typically an API key, token or connection string set via environment variables.

Declared by the Official MCP Registry, last synced Oct 16, 2026. Not independently verified by MCP Toplist.

Declared in the registry install config

MANAGED_AGENTS_URL · required
MANAGED_AGENTS_API_KEY · optional

INSTALLATION AND FIRST TASK

Connect SandBase Harness and confirm it works

Docker image

claude mcp add sandbase-harness -e "MANAGED_AGENTS_URL=<your MANAGED_AGENTS_URL>" -e "MANAGED_AGENTS_API_KEY=<your MANAGED_AGENTS_API_KEY>" -- docker run -i --rm ghcr.io/sandbaseai/sandbase-harness-mcp:0.3.8

Replace each placeholder with your own value before saving.

Docker image

[mcp_servers.sandbase-harness]
command = "docker"
args = ["run", "-i", "--rm", "ghcr.io/sandbaseai/sandbase-harness-mcp:0.3.8"]

[mcp_servers.sandbase-harness.env]
MANAGED_AGENTS_URL = "<your MANAGED_AGENTS_URL>"
MANAGED_AGENTS_API_KEY = "<your MANAGED_AGENTS_API_KEY>"

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

Docker image

{
  "mcpServers": {
    "sandbase-harness": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/sandbaseai/sandbase-harness-mcp:0.3.8"
      ],
      "env": {
        "MANAGED_AGENTS_URL": "<your MANAGED_AGENTS_URL>",
        "MANAGED_AGENTS_API_KEY": "<your MANAGED_AGENTS_API_KEY>"
      }
    }
  }
}

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

Docker image

{
  "mcpServers": {
    "sandbase-harness": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/sandbaseai/sandbase-harness-mcp:0.3.8"
      ],
      "env": {
        "MANAGED_AGENTS_URL": "<your MANAGED_AGENTS_URL>",
        "MANAGED_AGENTS_API_KEY": "<your MANAGED_AGENTS_API_KEY>"
      }
    }
  }
}

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

Docker image

{
  "servers": {
    "sandbase-harness": {
      "type": "stdio",
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/sandbaseai/sandbase-harness-mcp:0.3.8"
      ],
      "env": {
        "MANAGED_AGENTS_URL": "<your MANAGED_AGENTS_URL>",
        "MANAGED_AGENTS_API_KEY": "<your MANAGED_AGENTS_API_KEY>"
      }
    }
  }
}

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

Docker image

{
  "mcpServers": {
    "sandbase-harness": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/sandbaseai/sandbase-harness-mcp:0.3.8"
      ],
      "env": {
        "MANAGED_AGENTS_URL": "<your MANAGED_AGENTS_URL>",
        "MANAGED_AGENTS_API_KEY": "<your MANAGED_AGENTS_API_KEY>"
      }
    }
  }
}

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

Docker image

{
  "mcpServers": {
    "sandbase-harness": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/sandbaseai/sandbase-harness-mcp:0.3.8"
      ],
      "env": {
        "MANAGED_AGENTS_URL": "<your MANAGED_AGENTS_URL>",
        "MANAGED_AGENTS_API_KEY": "<your MANAGED_AGENTS_API_KEY>"
      }
    }
  }
}

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 sandbaseai

SandBase#2,714

View all sandbaseai servers →

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

MAINTENANCE AND EVIDENCE

What changed, and when this was checked

First listed: Aug 19, 2026
Latest version published: Aug 30, 2026
Version history: 2 versions tracked (below)
Requirements evidence: Declared by the Official MCP Registry, 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: Aug 30, 2026

Registry sightings

Official MCP ↗listed since Aug 19, 2026 · still listed

Do you maintain SandBase Harness? to correct or enrich this profile.

VERSIONS

Available versions (2)

Version	Published
0.3.8	Aug 30, 2026
0.3.4	Aug 19, 2026

STANDING

#447of 144,396 active serversTop 0.5%

Ranks ahead of 143,949 of 144,396 servers on MCP Toplist.

Recent momentum

+71GitHub stars since Aug 24 (+11%)

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.sandbaseai%2Fsandbase-harness.svg)](https://mcptoplist.com/server/io.github.sandbaseai%2Fsandbase-harness)

HTML

<a href="https://mcptoplist.com/server/io.github.sandbaseai%2Fsandbase-harness"><img src="https://mcptoplist.com/badge/io.github.sandbaseai%2Fsandbase-harness.svg" alt="MCP Toplist: Top 1% of 144,396" /></a>

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

FAQ

Frequently asked questions

Who maintains SandBase Harness?: SandBase Harness is maintained by sandbaseai, which publishes 2 MCP servers (3 total versions) tracked on MCP Toplist.
Is SandBase Harness listed on the Official MCP Registry?: Yes — SandBase Harness is listed on the Official MCP Registry.
How many versions does SandBase Harness have?: MCP Toplist tracks 2 versions of SandBase Harness, most recently published on Aug 30, 2026.
Where can I find the source code for SandBase Harness?: The source code for SandBase Harness is hosted at github.com/sandbaseai/sandbase-harness.

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