mcp-broker (pandaGaume/mcp-broker) is an MCP server listed on the M8ven Trust Index. It scores 74 out of 100, grade C. It declares 15 tools. No publisher has claimed this listing.

Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

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Who stands behind it

pandaGaume

Source: github_repo_search

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Install from

The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.

// key findings
⚠️
Known vulnerabilities in dependencies: 1 high
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
🔐
You'll be asked for 2 credentials: MCP_BROKER_PROVIDER_SECRET, MCP_BROKER_TLS_KEY
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// tools this server exposes15 tools

These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.

echo

Returns the text it was given, unchanged.

add

Adds two numbers and returns the sum.

random

Returns a random number in the half-open interval [min, max).

note_set

Stores a string value under a key in the in-memory note store.

note_get

Reads back the value previously stored under a key.

note_list

Lists every key currently in the note store.

broker_diagnose
broker_guide
broker_info
providers_list
provider_status
get_electrical_state
diagnose_machine
reset_baseline
start_machine
// known CVEs in dependencies1 high2 low

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

highws@8.18.0GHSA-96hv-2xvq-fx4p

ws: Memory exhaustion DoS from tiny fragments and data chunks

ws: Uninitialized memory disclosure

lowvitest@4.1.9GHSA-82fw-gwwq-j7x9

Vitest: Path Traversal / Arbitrary File Read via @vitest/mocker Redirect Mock

Depend on this server? Get alerted when its CVEs change.Watch this server free →
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configMCP_BROKER_ALLOWED_ORIGINSComma-separated browser origins allowed on the client endpoints. Unset means no browser origin passes. See below
configMCP_BROKER_AUTH_ENABLED1 to turn on the OAuth 2.1 resource server (requires the three below)
configMCP_BROKER_BUNDLE_DIRIf set, serve this directory at /bundle
configMCP_BROKER_CLIENT_PATHPrefix for raw WS clients
configMCP_BROKER_CONFIGPath to a JSON config file (see above)
configMCP_BROKER_HOSTInterface to bind
configMCP_BROKER_ISSUERExpected token issuer (defaults to the sole authorization server)
configMCP_BROKER_JWKSAuthorization server's JWKS URL, used to verify token signatures
configMCP_BROKER_LOCALEBCP-47 tag driving the _broker tool descriptions
configMCP_BROKER_MCP_PATHPer-slot suffix for Streamable HTTP
configMCP_BROKER_MESSAGES_PATHPer-slot suffix for legacy SSE posts
configMCP_BROKER_OPEN1 opens the broker root on startup; a /path or a same-origin absolute URL opens that page. Opens only when a static mount actually covers the resolved path
configMCP_BROKER_PORTTCP port to listen on
configMCP_BROKER_PROTOCOLhttp forces plain, https forces TLS, unset auto-detects from cert+key
configMCP_BROKER_PROVIDERS_PATHExact path for multiplexed provider WS connections (MultiplexTransport, envelopes)
configMCP_BROKER_PROVIDER_PATHPrefix for dedicated provider WS connections (DirectTransport, plain frames)
🔐 secretMCP_BROKER_PROVIDER_SECRETShared secret every provider must present to occupy a slot. Not gated by auth.enabled: setting it alone turns provider authentication on
configMCP_BROKER_PROVIDER_TAKEOVERreject, liveness or always when a second provider claims an occupied slot
configMCP_BROKER_PUBLIC_BASE_URLPublic origin used to build canonical resource URIs, e.g. https://mcp.example.com
configMCP_BROKER_SSE_PATHPer-slot suffix for the legacy SSE stream
configMCP_BROKER_STDIO_PROVIDERWhen set, bridge stdin/stdout JSON-RPC to this slot. Use _all, see [Claude Desktop integration](#claude-desktop-integration)
configMCP_BROKER_TLS_CERTPath to a PEM certificate. Enables HTTPS/WSS
🔐 secretMCP_BROKER_TLS_KEYPath to a PEM private key. Enables HTTPS/WSS
configMCP_BROKER_WWW_DIRIf set, serve this directory at /
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

15/15 tools missing one or more hints — echo (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); add (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); random (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +12 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Tool test coverage

7/15 tools referenced in tests (47%)

Write tests that reference each tool by name so every tool has at least one test.

Production dependencies are patched

0 critical, 1 high severity in production deps — ws@8.18.0 (high), ws@8.18.0 (low)

Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.

Domain consistency

npm scope @cyanmycelium doesn't match GitHub owner pandagaume

Use the same org name across GitHub, npm, and your homepage so users can verify the publisher.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 5 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
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commit: bb57ab7ada43e85af4835fbca74cc99e7c1e05a6
code hash: 167eef27d7a9269a0084d9e7f77fb5af472cf2c75452c2512eebf44c4b86afab
view raw JSON →
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