Show HN: Agent Middleware – permits and signed receipts for agent tool calls

Category: security

Tags: agent-security, idempotency, audit-logs, mcp, governance

Score: 5.5/10 (Innovation: 6, Technical: 6, Documentation: 5, Utility: 5)

Agent Middleware is a gateway that adds signed permits, idempotency keys, and offline-verifiable receipts to AI agent tool calls, aiming to prevent duplicate or unauthorized actions like refunds and deployments. It targets the emerging need for governance and auditability in autonomous agent workflows, though its guarantees are limited by downstream tool cooperation and it is currently pre-release.

Target audience: AI engineers, backend developers, platform teams deploying autonomous agents

Repository: https://github.com/agentmiddleware/agent-middleware · Python · Apache-2.0

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