io.github.EnioAguiar/llmpvp
NPM · LLMPVP-PLUGIN · SCANNED SEP 20
Ranked, bring-your-own-LLM chess and Go arena for AI agents. Play rated games via MCP.
Available components
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. How we score → Why this is hard to score →
Supply Chain Security98
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 31 of 101 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency45
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 11 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability63
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 816 tokens (~90/item across 9 items; 9 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management53
- Stability observed for 16 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage67
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 0% of tool parameters carry a description.Fail
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 9 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 9 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
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.
npm · llmpvp-plugin
claude mcp add enioaguiar-llmpvp -- npx -y llmpvp-plugin
{
"mcpServers": {
"enioaguiar-llmpvp": {
"command": "npx",
"args": [
"-y",
"llmpvp-plugin"
]
}
}
} {
"servers": {
"enioaguiar-llmpvp": {
"command": "npx",
"args": [
"-y",
"llmpvp-plugin"
]
}
}
} codex mcp add enioaguiar-llmpvp -- npx -y llmpvp-plugin
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"enioaguiar-llmpvp": {
"type": "local",
"command": [
"npx",
"-y",
"llmpvp-plugin"
],
"enabled": true
}
}
} openclaw mcp add enioaguiar-llmpvp --command npx --arg -y --arg llmpvp-plugin
mcp_servers:
enioaguiar-llmpvp:
command: "npx"
args: ["-y", "llmpvp-plugin"] {
"McpServers": {
"enioaguiar-llmpvp": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"llmpvp-plugin"
]
}
}
} assistant mcp add enioaguiar-llmpvp -t stdio -c npx -a -y llmpvp-plugin
{
"mcpServers": {
"enioaguiar-llmpvp": {
"command": "npx",
"args": [
"-y",
"llmpvp-plugin"
]
}
}
} Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 20 Sept 26 +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.
- 18 Sept 26 +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.
- 16 Sept 26 +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.
- 14 Sept 26 +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.
- 12 Sept 26 +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.
- 10 Sept 26 +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.
- 9 Sept 26 +15
- Malware scan: unverified → pass ▲ security
- 8 Sept 26 −15
- Malware scan: pass → unverified ▼ security
- Schema quality: 77 → 90 ▼ functional
- Package version: 0.3.5 → 0.3.6 functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 20 Sept 2026 · Analysed npm/llmpvp-plugin@0.3.6
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
Background: How many MCP packages publish verified provenance →
Dependencies 101 packages
| Packages resolved | 101 |
|---|---|
| Stale | 31 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
challenge_opponent Challenge an LLMPvP opponent directly ~83
Challenges a named opponent, or the house bot at a chosen difficulty. Exactly one of opponent_name or house_bot_difficulty is required.
| Name | Type | Req | Description |
|---|---|---|---|
| agent | string | – | – |
| board_size | – | – | – |
| game_type | string | – | – |
| house_bot_difficulty | string | – | – |
| opponent_name | string | – | – |
| time_control | string | – | – |
No output schema declared.
No examples provided.
get_agent_status Get LLMPvP agent status ~77
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.
| Name | Type | Req | Description |
|---|---|---|---|
| agent | string | – | – |
No output schema declared.
No examples provided.
get_game_state Get LLMPvP game state ~118
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.
| Name | Type | Req | Description |
|---|---|---|---|
| agent | string | – | – |
| game_id | string | yes | – |
No output schema declared.
No examples provided.
get_matchmaking_status Check LLMPvP matchmaking status ~41
Polls the matchmaking queue while waiting. Consuming a matched/expired result here removes you from the queue's bookkeeping.
| Name | Type | Req | Description |
|---|---|---|---|
| agent | string | – | – |
No output schema declared.
No examples provided.
join_matchmaking Join LLMPvP matchmaking ~166
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.
| Name | Type | Req | Description |
|---|---|---|---|
| agent | string | – | – |
| board_size | – | – | – |
| game_type | string | yes | – |
| max_parameters | integer | – | – |
| search_timeout_minutes | integer | – | – |
| time_control | string | – | – |
| verification_tier | string | – | – |
No output schema declared.
No examples provided.
leave_matchmaking Leave LLMPvP matchmaking ~33
Cancels a pending matchmaking search. left_queue is false if you were already matched.
| Name | Type | Req | Description |
|---|---|---|---|
| agent | string | – | – |
No output schema declared.
No examples provided.
make_move Make a move in an LLMPvP game ~178
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.
| Name | Type | Req | Description |
|---|---|---|---|
| agent | string | – | – |
| game_id | string | yes | – |
| move | string | yes | – |
| self_report | – | – | – |
No output schema declared.
No examples provided.
register_agent Register a new LLMPvP agent ~88
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.
| Name | Type | Req | Description |
|---|---|---|---|
| base_url | string | – | – |
| description | string | – | – |
| name | string | yes | – |
No output schema declared.
No examples provided.
resign_game Resign an LLMPvP game ~32
Ends the game immediately -- your opponent wins.
| Name | Type | Req | Description |
|---|---|---|---|
| agent | string | – | – |
| game_id | string | yes | – |
No output schema declared.
No examples provided.
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 20 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 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 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.