McpVanguard
A security proxy and active firewall for the Model Context Protocol that protects host systems from malicious intent, prompt injection, and data exfiltration. It acts as an interception layer between AI agents and tools, providing real-time verification and multi-layered defense mechanisms.
Limited view. Automated analysis covers part of this stack. Findings reflect what we verified. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
Limited view: static analysis for Python is partially covered.
How we verified
Verified is a snapshot. Live keeps it current, and builds your track record.
⚡ Connect GitHub → continuous verification on every pushwhy connect →Who stands behind it
provnai
Source: Glama
Claim it to get a verified publisher badge, a free copy of our full audit findings, and direct contact for any high-priority issues we find. Or connect your repo for our deepest verification, Live Monitored: read-only, revoke anytime. What we access →
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.
VANGUARD_PYTHONVIRTUAL_ENVDEMO_POISONED_METADATAVANGUARD_TOOL_CAPABILITIES_JSONVANGUARD_TRUSTED_SERVER_SIGNERS_FILEVANGUARD_TRUSTED_SERVER_SIGNERVANGUARD_API_KEYexport ="replace-with-a-long-random-secret"VANGUARD_ALLOWED_IPSVANGUARD_ALLOWED_ORIGINSVANGUARD_REQUIRE_ORIGINVANGUARD_EXPECTED_BEARER_ISSUERVANGUARD_EXPECTED_BEARER_AUDIENCEVANGUARD_REQUIRED_BEARER_CLAIMSVANGUARD_REQUIRED_BEARER_SCOPESVANGUARD_BEARER_SCOPE_MATCHVANGUARD_BEARER_CLAIM_POLICYVANGUARD_BIND_STREAMABLE_SESSIONSVANGUARD_TRUST_PROXY_HEADERSVANGUARD_TRUSTED_PROXY_IPSVANGUARD_MAX_CONCURRENT_SSEVANGUARD_MAX_GLOBAL_CONNECTIONSVANGUARD_SSE_RATE_LIMITVANGUARD_SSE_MAX_BODY_BYTESVANGUARD_LOG_FILEVANGUARD_AUDIT_FORMATVANGUARD_FINGERPRINT_SECRETVANGUARD_MAX_STREAMABLE_SESSIONSVANGUARD_SSE_HEARTBEAT_SECSVANGUARD_JWKS_CACHE_TTL_SECSVANGUARD_AUTH_MODEVANGUARD_JWKS_FILEVANGUARD_JWKS_JSONVANGUARD_JWKS_URLVANGUARD_OAUTH_DISCOVERY_URLVANGUARD_AUTH_CLOCK_SKEW_SECSVANGUARD_DISCOVERY_CACHE_TTL_SECSVANGUARD_JWKS_REFRESH_ON_KID_MISSVANGUARD_OAUTH_HTTP_TIMEOUT_SECSVANGUARD_BEHAVIORAL_ENABLEDVANGUARD_BEH_READ_LIMITVANGUARD_BEH_LIST_LIMITVANGUARD_BEH_NETWORK_LIMITVANGUARD_BEH_FLOOD_LIMITVANGUARD_BEH_PAYLOAD_LIMITVANGUARD_STRICT_REDISVANGUARD_BLOCK_ENUMERATIONVANGUARD_ENTROPY_HIGHVANGUARD_ENTROPY_BLOCKVANGUARD_ENTROPY_PENALTYVANGUARD_REDIS_URLVANGUARD_SENSITIVE_PATHSVANGUARD_PROFILEVANGUARD_TRUSTED_CAPABILITY_SIGNERS_FILEVANGUARD_TRUSTED_CAPABILITY_SIGNERVANGUARD_MCP_PROTOCOL_PROFILEVANGUARD_SEMANTIC_ENABLEDVANGUARD_OLLAMA_URLOllama Local execution, no API key requiredVANGUARD_OLLAMA_MODELVANGUARD_FLEET_URLVANGUARD_FLEET_SYNC_INTERVALVANGUARD_ALLOW_UNSIGNED_FLEETVANGUARD_MANAGEMENT_PLANE_MODEVANGUARD_REDACT_REVIEW_EXCERPTSVANGUARD_REVIEW_WEBHOOK_URLVANGUARD_REVIEW_WEBHOOK_SECRETVANGUARD_TRUSTED_PROVENANCE_SIGNERS_FILEVANGUARD_TRUSTED_PROVENANCE_SIGNERVANGUARD_DISABLE_UVLOOPNIXPACKSVANGUARD_LOG_LEVELVANGUARD_RULES_DIRVANGUARD_MANAGEMENT_TOOLS_ENABLEDVANGUARD_BLOCK_THRESHOLDVANGUARD_WARN_THRESHOLDVANGUARD_MODEVANGUARD_EXPOSE_BLOCK_REASONVANGUARD_MAX_STRING_LENVANGUARD_RECEIPTS_ENABLEDVANGUARD_RECEIPT_LOG_FILEVANGUARD_RECEIPT_TRANSPORTVANGUARD_RECEIPT_REDACTION_MODEVANGUARD_RECEIPT_CHAIN_ENABLEDVANGUARD_RECEIPT_EXTENSIONS_ENABLEDVANGUARD_METADATA_INSPECTION_ENABLEDVANGUARD_METADATA_POLICYVANGUARD_SERVER_MANIFEST_FILEVANGUARD_SERVER_MANIFEST_SIGNATURE_FILEVANGUARD_SERVER_MANIFEST_POLICYVANGUARD_SERVER_TRUST_POLICYVANGUARD_SERVER_MANIFEST_HASH_EXECUTABLEVANGUARD_SERVER_PROVENANCE_FILEVANGUARD_SERVER_PROVENANCE_SIGNATURE_FILEVANGUARD_SERVER_PROVENANCE_POLICYVANGUARD_REQUIRED_PROVENANCE_BUILDERSVANGUARD_SERVER_ARTIFACT_SIGNATURE_FILEVANGUARD_SERVER_ARTIFACT_POLICYVANGUARD_ALLOWED_SUPPLIER_IDSVANGUARD_SERVER_SIGSTORE_BUNDLE_FILEVANGUARD_SERVER_SIGSTORE_POLICYVANGUARD_ALLOWED_SIGSTORE_CERT_FINGERPRINTSVANGUARD_ALLOWED_SIGSTORE_IDENTITIESVANGUARD_ALLOWED_SIGSTORE_OIDC_ISSUERSVANGUARD_ALLOWED_SIGSTORE_BUILD_SIGNER_URISVANGUARD_ALLOWED_SIGSTORE_SOURCE_REPOSITORIESVANGUARD_ALLOWED_SIGSTORE_SOURCE_REFSVANGUARD_ALLOWED_SIGSTORE_SOURCE_DIGESTSVANGUARD_ALLOWED_SIGSTORE_BUILD_TRIGGERSVANGUARD_ALLOWED_SIGSTORE_TLOG_KEY_IDSVANGUARD_ALLOWED_SIGSTORE_GITHUB_REPOSITORIESVANGUARD_ALLOWED_SIGSTORE_GITHUB_REFSVANGUARD_ALLOWED_SIGSTORE_GITHUB_SHASVANGUARD_ALLOWED_SIGSTORE_GITHUB_TRIGGERSVANGUARD_ALLOWED_SIGSTORE_GITHUB_WORKFLOW_NAMESVANGUARD_SIGSTORE_TLOG_POLICYVANGUARD_CAPABILITY_MANIFEST_FILEVANGUARD_CAPABILITY_MANIFEST_SIGNATURE_FILEVANGUARD_CAPABILITY_TRUST_POLICYVANGUARD_CAPABILITY_MANIFEST_POLICYVANGUARD_AUTH_WARNING_TOOL_POLICYVANGUARD_DESTRUCTIVE_TOOL_AUTH_POLICYVANGUARD_REQUIRED_DESTRUCTIVE_ROLESVANGUARD_REQUIRED_DESTRUCTIVE_SCOPESVANGUARD_MAX_TOOL_CALLS_PER_MINUTEVANGUARD_MAX_RISKY_CALLS_PER_SESSIONVANGUARD_MAX_BLOCKED_ATTEMPTS_PER_SESSIONVANGUARD_ALLOWED_SERVER_COMMANDSIf you operate a hosted template or shared gateway, set to restrict which upstream MCP server executables McpVanguard may spawn.VANGUARD_SEMANTIC_FAIL_CLOSEDVANGUARD_DEFAULT_POLICYVANGUARD_REGEX_ENGINEVANGUARD_OPENAI_API_KEYOpenAI Default model: gpt-4o-miniVANGUARD_OPENAI_MODELVANGUARD_OPENAI_BASE_URLVANGUARD_MINIMAX_API_KEYVANGUARD_MINIMAX_MODELVANGUARD_MINIMAX_BASE_URLVANGUARD_SEMANTIC_CUSTOM_KEYUniversal Custom , related custom vars Fast inference providers such as Groq or DeepSeekVANGUARD_SEMANTIC_CUSTOM_MODELVANGUARD_SEMANTIC_CUSTOM_URLVANGUARD_SEMANTIC_THRESHOLD_BLOCKVANGUARD_SEMANTIC_THRESHOLD_WARNVANGUARD_SEMANTIC_TIMEOUT_SECSVANGUARD_SESSION_TTLVANGUARD_TRUSTED_SIGNERS_FILEVANGUARD_TRUSTED_SIGNERVANGUARD_TRUSTED_SUPPLIER_SIGNERS_FILEVANGUARD_TRUSTED_SUPPLIER_SIGNERVANGUARD_VEX_URLVANGUARD_VEX_API_URLVANGUARD_VEX_KEYVANGUARD_VEX_JWTVANGUARD_VEX_AGENT_IDPORTTool 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
6/6 tools missing one or more hints — handle_call_tool (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); list_dir (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); read_file (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +3 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 handlers catch errors
Only 0/1 tool handlers wrap calls in try/catch (0%)
Wrap each tool handler body in try/catch and return a structured error response.
Tests exist
No test files found
Add tests that exercise each declared tool.
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.
[](https://m8ven.ai/mcp/provnai/mcpvanguard)?variant=verified to the badge URL.Vetting this one by hand? Tool Check is an MCP that scores other MCPs. Add it once and ask Claude, ChatGPT, or any MCP client to grade a server, surface CVEs, check the publisher, and suggest safer alternatives — before you install.
https://m8ven.ai/api/mcp/tool-check