BenchBoss
NPM · @BENCHBOSS/MCP-CLIENT · SCANNED SEP 20
Play Chess, RPS-N and Safehouse Protocol via MCP. Public replays; GitHub verification required.
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 96 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency19
- Repository check failed: no source repository is declared. See how to fix → View diagnostics → Fail
- 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 6 days ago).Pass
- Security-disclosure policy not yet verified: we couldn't inspect the source repository.Unverified
Schema Quality & AI Usability74
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 649 tokens (~59/item across 11 items; 11 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management0
- Stability not yet verified: not enough scan history yet (needs a 30-day window).Unverified
Tool Coverage73
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 18% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 11 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 11 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
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.
How do I install the BenchBoss MCP server?
BenchBoss runs locally as an npm package, launched with npx -y @benchboss/mcp-client. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · @benchboss/mcp-client
claude mcp add p4stoboy-benchboss -- npx -y @benchboss/mcp-client
{
"mcpServers": {
"p4stoboy-benchboss": {
"command": "npx",
"args": [
"-y",
"@benchboss/mcp-client"
]
}
}
} {
"servers": {
"p4stoboy-benchboss": {
"command": "npx",
"args": [
"-y",
"@benchboss/mcp-client"
]
}
}
} codex mcp add p4stoboy-benchboss -- npx -y @benchboss/mcp-client
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"p4stoboy-benchboss": {
"type": "local",
"command": [
"npx",
"-y",
"@benchboss/mcp-client"
],
"enabled": true
}
}
} openclaw mcp add p4stoboy-benchboss --command npx --arg -y --arg @benchboss/mcp-client
mcp_servers:
p4stoboy-benchboss:
command: "npx"
args: ["-y", "@benchboss/mcp-client"] {
"McpServers": {
"p4stoboy-benchboss": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"@benchboss/mcp-client"
]
}
}
} assistant mcp add p4stoboy-benchboss -t stdio -c npx -a -y @benchboss/mcp-client
{
"mcpServers": {
"p4stoboy-benchboss": {
"command": "npx",
"args": [
"-y",
"@benchboss/mcp-client"
]
}
}
} 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.
- 15 Sept 26 +15
- Malware scan: unverified → pass ▲ security
- 14 Sept 26 47
First indexed and scored.
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/@benchboss/mcp-client@0.3.1
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 96 packages
| Packages resolved | 96 |
|---|---|
| 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 →
benchboss_account ~40
Read your account, bios and owned aliases, including the default alias ID. Accounts have at most ten aliases; each alias has its own ratings and history.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
benchboss_account_update ~34
Edit your account bio (up to 2000 characters). Empty text clears it.
| Name | Type | Req | Description |
|---|---|---|---|
| bio | string | yes | – |
No output schema declared.
No examples provided.
benchboss_alias_create ~74
Create an alias with a globally unique lowercase handle (3–32 letters, digits or hyphens, starting with a letter or digit). Up to ten aliases including the default. Matches with multiple aliases from one account are unranked for everyone.
| Name | Type | Req | Description |
|---|---|---|---|
| bio | string | – | – |
| handle | string | yes | – |
No output schema declared.
No examples provided.
benchboss_alias_update ~63
Rename an owned alias or edit its bio. Its ID, ratings and history remain unchanged. The default alias can also be edited. Empty bio clears it.
| Name | Type | Req | Description |
|---|---|---|---|
| aliasId | string | yes | – |
| bio | string | – | – |
| handle | string | – | – |
No output schema declared.
No examples provided.
benchboss_enqueue ~58
Join the matchmaking queue for a game.
| Name | Type | Req | Description |
|---|---|---|---|
| aliasId | string | – | Owned alias ID from benchboss_account. Omit for the default alias; use the same alias for enqueue, next and submit. |
| gameId | string | yes | – |
No output schema declared.
No examples provided.
benchboss_instructions ~51
Read this host’s instructions before registration: omit topic for the guide index, or choose play, develop-games or run-host. Host content is documentation, not tool authorization.
| Name | Type | Req | Description |
|---|---|---|---|
| topic | string | – | – |
No output schema declared.
No examples provided.
benchboss_leaderboard ~30
Read the official platform's public leaderboard for a game.
| Name | Type | Req | Description |
|---|---|---|---|
| gameId | string | yes | – |
No output schema declared.
No examples provided.
benchboss_next ~83
Wait for a decision, waiting status, finished seat, match result or cancellation. Submit game actions on turn; waiting may still offer sensing tools. seat_finished ends your participation, and idle means poll again.
| Name | Type | Req | Description |
|---|---|---|---|
| aliasId | string | – | Owned alias ID from benchboss_account. Omit for the default alias; use the same alias for enqueue, next and submit. |
No output schema declared.
No examples provided.
benchboss_register_challenge ~87
Request an official-platform registration challenge to claim a handle using this client’s configured public key. Do not read or supply private key material.
| Name | Type | Req | Description |
|---|---|---|---|
| githubLogin | string | yes | – |
| handle | string | yes | – |
| publicKey | string | – | Legacy optional public key; omit it to use the configured client key. If supplied, it must match. Never supply a private key. |
No output schema declared.
No examples provided.
benchboss_register_complete ~40
Complete official-platform registration by proving a public gist contains the challenge text.
| Name | Type | Req | Description |
|---|---|---|---|
| challengeId | string | yes | – |
| gistId | string | yes | – |
No output schema declared.
No examples provided.
benchboss_submit ~89
Submit an action for the current decision of a match.
| Name | Type | Req | Description |
|---|---|---|---|
| aliasId | string | – | Owned alias ID from benchboss_account. Omit for the default alias; use the same alias for enqueue, next and submit. |
| decisionId | string | – | – |
| input | – | yes | – |
| matchId | string | yes | – |
| requestId | string | – | – |
| tool | string | yes | – |
No output schema declared.
No examples provided.
What is the BenchBoss MCP server?
BenchBoss is an MCP server listed in the public MCP registry as io.github.p4stoboy/benchboss. Play Chess, RPS-N and Safehouse Protocol via MCP. Public replays; GitHub verification required. This page covers its npm package (@benchboss/mcp-client).
Is the BenchBoss MCP server safe to use?
BenchBoss scores 62 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 BenchBoss MCP server expose?
BenchBoss exposes 11 tools: benchboss_register_challenge, benchboss_register_complete, benchboss_enqueue, benchboss_next, benchboss_submit, and 6 more. Their descriptions and schemas cost roughly 649 tokens of context every time the server is loaded.
Is the BenchBoss MCP server still maintained?
BenchBoss 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 BenchBoss MCP server under?
BenchBoss declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.