# Hermes Prime (pypi · hermes-prime-mcp)

Read-only stdio MCP server for a versioned convention card in Claude Code.

- Trust score: 54/100 (low)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- pypi · `hermes-prime-mcp`: 54/100 (this document), [markdown](https://verifymcp.io/servers/hermes-labs-ai-hermes-prime/hermes-prime-mcp.md), [page](https://verifymcp.io/servers/hermes-labs-ai-hermes-prime/hermes-prime-mcp)

## Channel facts

- Registry: `pypi`
- Package: `hermes-prime-mcp`
- Version: `0.2.1a2`
- 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 2026-09-20.

- **Supply Chain Security**: 50/100
  - Malware scan not yet available for this package.
  - No known CVEs affecting this package version or its production dependencies.
  - Runs setuptools.build_meta at install time, a recognised native-build step with no shell scripting around it.
  - 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 2 days ago).
  - Publishes a security disclosure policy (SECURITY.md).
- **Schema Quality & AI Usability**: 82/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 201 tokens (~100/item across 2 items; 2 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 2 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 3 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 20/100
  - Spec-recency check failed: implements MCP spec 2024-11-05; the latest is 2026-07-28.

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### How do I install the Hermes Prime MCP server?

Hermes Prime runs locally as a PyPI package, launched with uvx hermes-prime-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 hermes-labs-ai-hermes-prime -- uvx hermes-prime-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "hermes-labs-ai-hermes-prime": {
      "command": "uvx",
      "args": [
        "hermes-prime-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "hermes-labs-ai-hermes-prime": {
      "command": "uvx",
      "args": [
        "hermes-prime-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add hermes-labs-ai-hermes-prime -- uvx hermes-prime-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "hermes-labs-ai-hermes-prime": {
      "type": "local",
      "command": [
        "uvx",
        "hermes-prime-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add hermes-labs-ai-hermes-prime --command uvx --arg hermes-prime-mcp
```

### Hermes

```yaml
mcp_servers:
  hermes-labs-ai-hermes-prime:
    command: "uvx"
    args: ["hermes-prime-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "hermes-labs-ai-hermes-prime": {
      "Transport": "stdio",
      "Command": "uvx",
      "Arguments": [
        "hermes-prime-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add hermes-labs-ai-hermes-prime -t stdio -c uvx -a hermes-prime-mcp
```

### Other

```json
{
  "mcpServers": {
    "hermes-labs-ai-hermes-prime": {
      "command": "uvx",
      "args": [
        "hermes-prime-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.

### 2026-09-18 (score 54)

First indexed and scored.

## MCP tools (2)

### `get_conventions` (~114 tokens)

Return the hermes-prime CLAUDE-fragment as raw markdown — the session-priming conventions (grounding triggers, tool map, rules-most-often-forgotten). Optional scope_class returns a scoped fragment from fragments/<scope_class>.md when present; otherwise falls back to the default fragment. Call once at session start to load conventions without polluting CLAUDE.md.

Input parameters:

- `scope_class` (string): Optional scope class (e.g. 'session-init'). Falls back to the default fragment if unknown.

### `list_scopes` (~23 tokens)

List available scoped fragments (one per line). Always includes 'default'.

## Diagnostics

Captured diagnostic sections: Provenance, Install scripts, Dependencies. The full working is on the page: https://verifymcp.io/servers/hermes-labs-ai-hermes-prime/hermes-prime-mcp#diagnostics

## Score history

- 2026-09-20: 54
- 2026-09-19: 54
- 2026-09-18: 54

## Common questions

### What is the Hermes Prime MCP server?

Hermes Prime is an MCP server listed in the public MCP registry as io.github.hermes-labs-ai/hermes-prime. Read-only stdio MCP server for a versioned convention card in Claude Code. This page covers its PyPI package (hermes-prime-mcp).

### Is the Hermes Prime MCP server safe to use?

Hermes Prime scores 54 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 September 2026. 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 Hermes Prime MCP server expose?

Hermes Prime exposes 2 tools: get_conventions, list_scopes. Their descriptions and schemas cost roughly 137 tokens of context every time the server is loaded.

### Is the Hermes Prime MCP server still maintained?

Hermes Prime is still listed as active in the MCP registry. We last reached this channel on 20 September 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 Hermes Prime MCP server under?

Hermes Prime 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

- PyPI project: https://pypi.org/project/hermes-prime-mcp/
- Socket report: https://socket.dev/pypi/package/hermes-prime-mcp
- Repository: https://github.com/hermes-labs-ai/hermes-prime
- Changelog RSS feed: https://verifymcp.io/servers/hermes-labs-ai-hermes-prime/hermes-prime-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/hermes-labs-ai-hermes-prime/hermes-prime-mcp.json
- HTML version of this page: https://verifymcp.io/servers/hermes-labs-ai-hermes-prime/hermes-prime-mcp