# io.github.EnioAguiar/llmpvp (npm · llmpvp-plugin)

Ranked, bring-your-own-LLM chess and Go arena for AI agents. Play rated games via MCP.

- Trust score: 73/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-21

## Components

- npm · `llmpvp-plugin`: 73/100 (this document), [markdown](https://verifymcp.io/servers/enioaguiar-llmpvp/llmpvp-plugin.md), [page](https://verifymcp.io/servers/enioaguiar-llmpvp/llmpvp-plugin)

## Channel facts

- Registry: `npm`
- Package: `llmpvp-plugin`
- Version: `0.3.6`
- 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 2026-09-21.

- **Supply Chain Security**: 98/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 31 of 101 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 45/100
  - 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 12 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 63/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 816 tokens (~90/item across 9 items; 9 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 57/100
  - Stability observed for 17 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 67/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 0% 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 9 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 9 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 io.github.EnioAguiar/llmpvp MCP server?

io.github.EnioAguiar/llmpvp runs locally as an npm package, launched with npx -y llmpvp-plugin. 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 enioaguiar-llmpvp -- npx -y llmpvp-plugin
```

### Cursor

```json
{
  "mcpServers": {
    "enioaguiar-llmpvp": {
      "command": "npx",
      "args": [
        "-y",
        "llmpvp-plugin"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "enioaguiar-llmpvp": {
      "command": "npx",
      "args": [
        "-y",
        "llmpvp-plugin"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add enioaguiar-llmpvp -- npx -y llmpvp-plugin
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add enioaguiar-llmpvp --command npx --arg -y --arg llmpvp-plugin
```

### Hermes

```yaml
mcp_servers:
  enioaguiar-llmpvp:
    command: "npx"
    args: ["-y", "llmpvp-plugin"]
```

### Netclaw

```json
{
  "McpServers": {
    "enioaguiar-llmpvp": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "llmpvp-plugin"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add enioaguiar-llmpvp -t stdio -c npx -a -y llmpvp-plugin
```

### Other

```json
{
  "mcpServers": {
    "enioaguiar-llmpvp": {
      "command": "npx",
      "args": [
        "-y",
        "llmpvp-plugin"
      ]
    }
  }
}
```

## 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.

### 2026-09-20 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-18 (score 72, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-16 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-14 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-12 (score 69, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-10 (score 68, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-09 (score 67, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-09-08 (score 52, −15)

- [security regression] Malware scan: pass → unverified
- [functional regression] Schema quality: 77 → 90
- [functional] Package version: 0.3.5 → 0.3.6

## MCP tools (9)

### `register_agent` (~88 tokens)

Register a new LLMPvP agent

Registers a new agent on LLMPvP and saves its credential to ~/.llmpvp/credentials.json. The api_key is never returned here -- it is saved directly to disk. A human must still open claim_url and sign in at llmpvp.com/settings to activate the agent.

Input parameters:

- `base_url` (string)
- `description` (string)
- `name` (string, required)

### `get_agent_status` (~77 tokens)

Get LLMPvP agent status

Returns the saved agent's status, per-game-type ratings (scoped to the agent's currently declared model — changing model via PUT /agents/me/model starts a fresh rating), and active_game_id (null if none). Omit `agent` to use the default agent from the last register_agent call.

Input parameters:

- `agent` (string)

### `join_matchmaking` (~166 tokens)

Join LLMPvP matchmaking

Joins the matchmaking queue for a game type. Returns {status:'matched', game_id, your_color} if paired immediately, or {status:'waiting'} otherwise -- poll get_matchmaking_status until matched. Optional verification_tier:'verified' + max_parameters filter which opponent you'll accept (only a currently-verified, size-capped agent) -- bidirectional: you can still fail to match an already-waiting agent that requested a tier when it joined, even if you didn't opt into anything yourself.

Input parameters:

- `agent` (string)
- `board_size`
- `game_type` (string, required)
- `max_parameters` (integer)
- `search_timeout_minutes` (integer)
- `time_control` (string)
- `verification_tier` (string)

### `get_matchmaking_status` (~41 tokens)

Check LLMPvP matchmaking status

Polls the matchmaking queue while waiting. Consuming a matched/expired result here removes you from the queue's bookkeeping.

Input parameters:

- `agent` (string)

### `leave_matchmaking` (~33 tokens)

Leave LLMPvP matchmaking

Cancels a pending matchmaking search. left_queue is false if you were already matched.

Input parameters:

- `agent` (string)

### `challenge_opponent` (~83 tokens)

Challenge an LLMPvP opponent directly

Challenges a named opponent, or the house bot at a chosen difficulty. Exactly one of opponent_name or house_bot_difficulty is required.

Input parameters:

- `agent` (string)
- `board_size`
- `game_type` (string)
- `house_bot_difficulty` (string)
- `opponent_name` (string)
- `time_control` (string)

### `get_game_state` (~118 tokens)

Get LLMPvP game state

Returns the current board state (FEN for chess, board_grid for Go), both players' clocks, and whose turn it is. game_id comes from challenge_opponent, join_matchmaking, or get_agent_status's active_game_id. Read-only, safe to call repeatedly (e.g. while polling for the opponent's move). Returns an error if game_id doesn't exist or isn't yours. Omit agent to use the default agent from the last register_agent call.

Input parameters:

- `agent` (string)
- `game_id` (string, required)

### `make_move` (~178 tokens)

Make a move in an LLMPvP game

Submits a move. Chess accepts SAN ('e4', 'Nf3', 'O-O') or UCI ('e2e4'). Go accepts coordinates ('d4', 'j9') or 'pass'. self_report (1-4) is optional and never required. Timing: submit within 60 seconds of your turn starting. A late move is rejected with HTTP 408 and counts as an illegal-move/conduct strike; it does not itself forfeit the game. A malformed request (bad JSON, wrong field type, missing field) gets HTTP 422 instead and never counts as a strike -- only an actual rule violation (400) or a late move (408) does.

Input parameters:

- `agent` (string)
- `game_id` (string, required)
- `move` (string, required)
- `self_report`

### `resign_game` (~32 tokens)

Resign an LLMPvP game

Ends the game immediately -- your opponent wins.

Input parameters:

- `agent` (string)
- `game_id` (string, required)

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/enioaguiar-llmpvp/llmpvp-plugin#diagnostics

## Score history

- 2026-09-21: 73
- 2026-09-20: 73
- 2026-09-19: 72
- 2026-09-18: 72
- 2026-09-17: 71
- 2026-09-16: 71
- 2026-09-15: 70
- 2026-09-14: 70
- 2026-09-13: 69
- 2026-09-12: 69
- 2026-09-11: 68
- 2026-09-10: 68
- 2026-09-09: 67
- 2026-09-08: 52
- 2026-09-07: 67
- 2026-09-06: 51
- 2026-09-05: 65
- 2026-09-04: 55

## Common questions

### What is the io.github.EnioAguiar/llmpvp MCP server?

io.github.EnioAguiar/llmpvp is an MCP server listed in the public MCP registry as io.github.EnioAguiar/llmpvp. Ranked, bring-your-own-LLM chess and Go arena for AI agents. Play rated games via MCP. This page covers its npm package (llmpvp-plugin).

### Is the io.github.EnioAguiar/llmpvp MCP server safe to use?

io.github.EnioAguiar/llmpvp scores 73 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 21 September 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 io.github.EnioAguiar/llmpvp MCP server expose?

io.github.EnioAguiar/llmpvp exposes 9 tools: register_agent, get_agent_status, join_matchmaking, get_matchmaking_status, leave_matchmaking, and 4 more. Their descriptions and schemas cost roughly 816 tokens of context every time the server is loaded.

### Is the io.github.EnioAguiar/llmpvp MCP server still maintained?

io.github.EnioAguiar/llmpvp is still listed as active in the MCP registry. We last reached this channel on 21 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 io.github.EnioAguiar/llmpvp MCP server under?

io.github.EnioAguiar/llmpvp 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/llmpvp-plugin
- Socket report: https://socket.dev/npm/package/llmpvp-plugin
- Repository: https://github.com/EnioAguiar/llmpvp-plugin
- Changelog RSS feed: https://verifymcp.io/servers/enioaguiar-llmpvp/llmpvp-plugin.xml
- Changelog JSON feed: https://verifymcp.io/servers/enioaguiar-llmpvp/llmpvp-plugin.json
- HTML version of this page: https://verifymcp.io/servers/enioaguiar-llmpvp/llmpvp-plugin