What is Signet and how does it secure MCP requests?

Signet's an open-source lib for crypto-signing AI agent tool calls over MCP. Agents sign requests; servers verify and co-sign responses — full bilateral proof.

How do I add Signet verification to my MCP server?

Import verifyRequest, pass request with trustedKeys and maxAge. Three lines in your handler. Rejects fakes instantly.

Does Signet work with popular AI agent frameworks?

Yep — framework-agnostic. Hooks into any MCP handler. LangGraph, CrewAI, drop it in.

🤖 AI Dev Tools

Signet Closes the Loop: Now Servers Can Actually Trust AI Agent Requests

AI agents are everywhere, firing off tool calls via MCP. But were those requests really from your agent? Signet's new bilateral signing fixes that broken trust chain overnight.

theAIcatchup Apr 08, 2026 3 min read

Diagram showing bilateral signing flow between AI agent and MCP server in Signet

⚡ Key Takeaways

Signet evolves from one-sided agent signing to full bilateral verification in days. 𝕏
Servers verify MCP requests in 3 lines, catching spoofs, replays, and tampering. 𝕏
This sets the HTTPS precedent for AI agent-tool trust — expect rapid adoption. 𝕏

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Originally reported by dev.to

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