# Harness (npm · @autonomous-ai/harness-mcp)

Start Claude Code and Codex agents the person can watch, wait for them and read their answers.

- Trust score: 71/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-22

## Components

- mcpb · `harness-mcp.mcpb`: 41/100, [markdown](https://verifymcp.io/servers/ai-autonomous-harness-harness/harness-mcp.md), [page](https://verifymcp.io/servers/ai-autonomous-harness-harness/harness-mcp)
- npm · `@autonomous-ai/harness-mcp`: 71/100 (this document), [markdown](https://verifymcp.io/servers/ai-autonomous-harness-harness/autonomous-ai-harness-mcp.md), [page](https://verifymcp.io/servers/ai-autonomous-harness-harness/autonomous-ai-harness-mcp)

## Channel facts

- Registry: `npm`
- Package: `@autonomous-ai/harness-mcp`
- Version: `0.2.0`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-10-22.

- **Supply Chain Security**: 100/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - No production dependencies, so there is no dependency health to assess.
- **Provenance & Transparency**: 48/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 3 days ago).
  - Publishes a security disclosure policy (SECURITY.md).
- **Schema Quality & AI Usability**: 66/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 223 tokens (~223/item across 1 items; 1 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 10/100
  - Stability observed for 3 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 1 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 2 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the Harness MCP server?

Harness runs locally as an npm package, launched with npx -y @autonomous-ai/harness-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add ai-autonomous-harness-harness -- npx -y @autonomous-ai/harness-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "ai-autonomous-harness-harness": {
      "command": "npx",
      "args": [
        "-y",
        "@autonomous-ai/harness-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "ai-autonomous-harness-harness": {
      "command": "npx",
      "args": [
        "-y",
        "@autonomous-ai/harness-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add ai-autonomous-harness-harness -- npx -y @autonomous-ai/harness-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "ai-autonomous-harness-harness": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@autonomous-ai/harness-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add ai-autonomous-harness-harness --command npx --arg -y --arg @autonomous-ai/harness-mcp
```

### Hermes

```yaml
mcp_servers:
  ai-autonomous-harness-harness:
    command: "npx"
    args: ["-y", "@autonomous-ai/harness-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "ai-autonomous-harness-harness": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "@autonomous-ai/harness-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add ai-autonomous-harness-harness -t stdio -c npx -a -y @autonomous-ai/harness-mcp
```

### Other

```json
{
  "mcpServers": {
    "ai-autonomous-harness-harness": {
      "command": "npx",
      "args": [
        "-y",
        "@autonomous-ai/harness-mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-10-22 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-20 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 0 to 3. That category is still filling its 30-day observation window: 0 days of observed history at the previous scan, 1 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-19 (score 69)

First indexed and scored.

## MCP tools (1)

### `harness_setup` (~39 tokens)

Harness is not installed here. Call this for how to install it, which gives you tools to start, wait for, read and close other coding agents.

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/ai-autonomous-harness-harness/autonomous-ai-harness-mcp#diagnostics

## Score history

- 2026-10-22: 71
- 2026-10-21: 70
- 2026-10-20: 70
- 2026-10-19: 69

## Common questions

### What is the Harness MCP server?

Harness is an MCP server listed in the public MCP registry as ai.autonomous.harness/harness. Start Claude Code and Codex agents the person can watch, wait for them and read their answers. This page covers its npm package (@autonomous-ai/harness-mcp).

### Is the Harness MCP server safe to use?

Harness scores 71 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 22 October 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Harness MCP server expose?

Harness exposes 1 tool: harness_setup. Their descriptions and schemas cost roughly 39 tokens of context every time the server is loaded.

### Is the Harness MCP server still maintained?

Harness is still listed as active in the MCP registry. We last reached this channel on 22 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the Harness MCP server under?

Harness declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/@autonomous-ai/harness-mcp
- Socket report: https://socket.dev/npm/package/@autonomous-ai/harness-mcp
- Repository: https://github.com/autonomous-ai/openharness
- Website: https://harness.autonomous.ai/agents
- Changelog RSS feed: https://verifymcp.io/servers/ai-autonomous-harness-harness/autonomous-ai-harness-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/ai-autonomous-harness-harness/autonomous-ai-harness-mcp.json
- HTML version of this page: https://verifymcp.io/servers/ai-autonomous-harness-harness/autonomous-ai-harness-mcp