SandBase Harness MCP Server

Name: SandBase Harness MCP Server
Author: io.github.sandbaseai

io.github.sandbaseai/sandbase-harness

Repository Registry

What is the SandBase Harness MCP server?

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

How to install SandBase Harness

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

MANAGED_AGENTS_URL
required
URL of the SandBase Harness runtime API.
MANAGED_AGENTS_API_KEY
secret
API key when the connected Harness runtime requires authentication.

Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "sandbase-harness": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/sandbaseai/sandbase-harness-mcp:0.3.4"
      ],
      "env": {
        "MANAGED_AGENTS_URL": "<YOUR_MANAGED_AGENTS_URL>",
        "MANAGED_AGENTS_API_KEY": "<YOUR_MANAGED_AGENTS_API_KEY>"
      }
    }
  }
}

Cursor

~/.cursor/mcp.json

{
  "mcpServers": {
    "sandbase-harness": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/sandbaseai/sandbase-harness-mcp:0.3.4"
      ],
      "env": {
        "MANAGED_AGENTS_URL": "<YOUR_MANAGED_AGENTS_URL>",
        "MANAGED_AGENTS_API_KEY": "<YOUR_MANAGED_AGENTS_API_KEY>"
      }
    }
  }
}

Windsurf

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "sandbase-harness": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/sandbaseai/sandbase-harness-mcp:0.3.4"
      ],
      "env": {
        "MANAGED_AGENTS_URL": "<YOUR_MANAGED_AGENTS_URL>",
        "MANAGED_AGENTS_API_KEY": "<YOUR_MANAGED_AGENTS_API_KEY>"
      }
    }
  }
}

VS Code

.vscode/mcp.json

{
  "servers": {
    "sandbase-harness": {
      "type": "stdio",
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/sandbaseai/sandbase-harness-mcp:0.3.4"
      ],
      "env": {
        "MANAGED_AGENTS_URL": "<YOUR_MANAGED_AGENTS_URL>",
        "MANAGED_AGENTS_API_KEY": "<YOUR_MANAGED_AGENTS_API_KEY>"
      }
    }
  }
}

Claude Code

claude mcp add sandbase-harness --env MANAGED_AGENTS_URL=<YOUR_MANAGED_AGENTS_URL> --env MANAGED_AGENTS_API_KEY=<YOUR_MANAGED_AGENTS_API_KEY> -- docker run -i --rm ghcr.io/sandbaseai/sandbase-harness-mcp:0.3.4