Repo · Safety & guardrails
Jev Shield
Check MCP calls, outputs, and tool descriptions.
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Semantic MCP firewall powered by Jev — screens every tool call, tool result, and tool description with calibrated System One verification. 94% block recall, 0 false positives, ~$0.00002/check.
ai-safetymcpprompt-injectionsecurityvercel-ai-gateway
How builders describe it
Semantic MCP firewall powered by Jev — screens every tool call, tool result, and tool description with calibrated System One verification. 94% block recall, 0 false positives, ~$0.00002/check.
Semantic MCP firewall and agent skill: screens tool calls, tool results, and tool descriptions with TypeSafe Jev via Vercel AI Gateway experimental_evaluate.
Proxy that sits between any MCP client and any stdio MCP server and screens tool calls, tool results and tool descriptions with Jev probabilities, layering deterministic allowlists, semantic checks and session taint tracking over a JSONL audit trail.
The decision Jev makes
Allow, flag or escalate a message, tool call or action.
Where it fits
Screening messages, tool calls and outputs before they cause trouble. Jev gives a fast, calibrated verdict that can sit in front of every request or agent action. All 229 safety & guardrails projects →
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