> ## Documentation Index > Fetch the complete documentation index at: https://mandatez.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Introduction > What is MandateZ and why does it exist ⚡ The Vercel breach (April 19, 2026) was prevented by MandateZ governance. [Read the full analysis →](/vercel-breach) # What is MandateZ? MandateZ is the neutral, cross-vendor trust infrastructure layer for AI agents. Every AI agent needs a mandate — a cryptographically signed authorization that defines its identity, what it is permitted to do, and a tamper-proof log of everything it has done. ## The Problem AI agents are autonomous. They read emails, write to databases, call APIs, and make payments — often without human oversight. Companies deploying agents have no standardized way to: * **Prove** which agent did what * **Enforce** what agents are and are not allowed to do * **Produce** compliance audit trails on demand * **Trust** agents from other companies ## How MandateZ Solves It Every agent action flows through a single spine: the **Agent Event Stream**. ``` Agent Action → Policy Check → Oversight Gate → Sign Event → Emit to Stream ``` Each event is: * **Identified** — every agent has a unique ID and Ed25519 keypair * **Signed** — every action produces a cryptographically signed event * **Enforced** — policy rules allow, block, or flag actions before they execute * **Auditable** — the event stream is your compliance audit trail ## Works With Everything MandateZ is vendor-neutral by design. It works with: * **LangChain** — callback handler for LLM and tool tracking * **n8n** — workflow execution hooks * **AutoGen** — coming soon * **CrewAI** — coming soon * **Any agent framework** — the SDK wraps any async action No single platform (OpenAI, Anthropic, AWS) can be this layer without a conflict of interest. MandateZ is neutral infrastructure. ## Open Protocol The [MandateZ Protocol Specification](/protocol) defines the wire format, signing algorithm, policy semantics, and transport contract as an open standard. Any developer can build a conforming implementation in any language.