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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pandaGaume
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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.
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.
echoReturns the text it was given, unchanged.
addAdds two numbers and returns the sum.
randomReturns a random number in the half-open interval [min, max).
note_setStores a string value under a key in the in-memory note store.
note_getReads back the value previously stored under a key.
note_listLists every key currently in the note store.
broker_diagnosebroker_guidebroker_infoproviders_listprovider_statusget_electrical_statediagnose_machinereset_baselinestart_machineDisclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
ws: Memory exhaustion DoS from tiny fragments and data chunks
ws: Uninitialized memory disclosure
Vitest: Path Traversal / Arbitrary File Read via @vitest/mocker Redirect Mock
MCP_BROKER_ALLOWED_ORIGINSComma-separated browser origins allowed on the client endpoints. Unset means no browser origin passes. See belowMCP_BROKER_AUTH_ENABLED1 to turn on the OAuth 2.1 resource server (requires the three below)MCP_BROKER_BUNDLE_DIRIf set, serve this directory at /bundleMCP_BROKER_CLIENT_PATHPrefix for raw WS clientsMCP_BROKER_CONFIGPath to a JSON config file (see above)MCP_BROKER_HOSTInterface to bindMCP_BROKER_ISSUERExpected token issuer (defaults to the sole authorization server)MCP_BROKER_JWKSAuthorization server's JWKS URL, used to verify token signaturesMCP_BROKER_LOCALEBCP-47 tag driving the _broker tool descriptionsMCP_BROKER_MCP_PATHPer-slot suffix for Streamable HTTPMCP_BROKER_MESSAGES_PATHPer-slot suffix for legacy SSE postsMCP_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 pathMCP_BROKER_PORTTCP port to listen onMCP_BROKER_PROTOCOLhttp forces plain, https forces TLS, unset auto-detects from cert+keyMCP_BROKER_PROVIDERS_PATHExact path for multiplexed provider WS connections (MultiplexTransport, envelopes)MCP_BROKER_PROVIDER_PATHPrefix for dedicated provider WS connections (DirectTransport, plain frames)MCP_BROKER_PROVIDER_SECRETShared secret every provider must present to occupy a slot. Not gated by auth.enabled: setting it alone turns provider authentication onMCP_BROKER_PROVIDER_TAKEOVERreject, liveness or always when a second provider claims an occupied slotMCP_BROKER_PUBLIC_BASE_URLPublic origin used to build canonical resource URIs, e.g. https://mcp.example.comMCP_BROKER_SSE_PATHPer-slot suffix for the legacy SSE streamMCP_BROKER_STDIO_PROVIDERWhen set, bridge stdin/stdout JSON-RPC to this slot. Use _all, see [Claude Desktop integration](#claude-desktop-integration)MCP_BROKER_TLS_CERTPath to a PEM certificate. Enables HTTPS/WSSMCP_BROKER_TLS_KEYPath to a PEM private key. Enables HTTPS/WSSMCP_BROKER_WWW_DIRIf set, serve this directory at /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.
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