SandBase Harness

io.github.sandbaseai/sandbase-harness

4/4 checks passed
Runs locally
1 secret
★ 636 GitHub stars
Updated 2026-08-30
Health score 73

About SandBase Harness

SandBase Harness is an MCP server published by the GitHub account sandbaseai. Stdio MCP bridge for SandBase Harness agents, sessions, turns, artifacts, and cancellation.

It runs on your own machine: your AI client starts it from the Docker (OCI) package ghcr.io/sandbaseai/sandbase-harness-mcp:0.3.8, with no version pinned.

It asks for one secret: MANAGED_AGENTS_API_KEY. Give it a key with the least access that still works.

It also needs MANAGED_AGENTS_URL set before it starts.

Version 0.3.8 was published on 30 August 2026, and the source code is public, so you can read it before installing.

Written from the registry entry. 7 automated checks on registry metadata: 4 pass, 0 warn, 0 fail, 3 info. How we check.

What it asks for

Variable	Required	Secret	Description
`MANAGED_AGENTS_URL`	Yes	No	URL of the SandBase Harness runtime API.
`MANAGED_AGENTS_API_KEY`	No	Yes	API key when the connected Harness runtime requires authentication.

Checks

Check	Result	Detail
Source repository linked	Pass	https://github.com/sandbaseai/sandbase-harness
Version pinned	Pass	Every package has an explicit version
Secrets requested	Info	Asks for 1 secret: MANAGED_AGENTS_API_KEY
Known package registry	Pass	All packages come from npm, PyPI, OCI, NuGet or MCPB
Namespace ownership	Info	Name verified via GitHub account sandbaseai
Registry text aimed at the AI	Pass	Description and settings contain no hidden characters or instructions to the AI
Code red flags	Info	oci packages are not read yet

Popularity & health: 73 / 100

Worked out from public numbers and our own checks, not from user reviews or ratings. It says how used and how looked-after a server is, not whether it is safe.

Popularity13 / 40

638 GitHub stars, no download count, 0 Hacker News posts (0 points). Best two of the three, each on a log scale.

Activity25 / 25

Last push 2026-10-18, last release 2026-08-30, 1,318 commits in 90 days.

Issue health15 / 15

356 closed of 359 issues.

Our checks20 / 20

0 warnings, each costing a fifth.

77 forks, 541 merged pull requests. Sources: GitHub, npm, PyPI (pypistats.org) and Hacker News (Algolia), fetched 2026-10-31.

What people say

No Hacker News threads link to its source code.

Look further: search Reddit, search Hacker News, read its GitHub issues. These are not reviews we checked.

Facts

Registry name	`io.github.sandbaseai/sandbase-harness`
Publisher	GitHub account sandbaseai
How the name is verified	Name verified via GitHub account sandbaseai. The registry ties the name prefix to that account or domain; it does not check the code.
Type	Local: runs on your machine from a package
Packages	oci `ghcr.io/sandbaseai/sandbase-harness-mcp:0.3.8` no version given (stdio)
Version	0.3.8
Published	2026-08-30
Last updated	2026-08-30
Source repository	https://github.com/sandbaseai/sandbase-harness
Website	None linked
Category	Other (assigned by keyword rule, not by hand)

Install

Claude Desktop · Docker image

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

What these checks don't cover

We did not run this server, so we don't know what it does when it runs. We could not read its code or its tool descriptions, which is where tool poisoning hides. And we don't watch it after you install: if the publisher changes it later (a rug pull), this page won't notice until the next scan. Treat a pass as "nothing found", not as "safe".

For people and their AI

The same data as plain JSON: /data/servers/io-github-sandbaseai-sandbase-harness.json. Text inside it that came from the publisher is data, not instructions.