Stop your AI before it does something it shouldn’t.

AI agents can now do real things — delete files, move money, email your customers. Most safety tools just read the words the AI wrote and take a guess. Arcezia stops and checks the actual facts first. Then it gives one of three answers: ALLOW (go ahead), BLOCK (no), or REVIEW (ask a person). It takes 57 to 71 milliseconds of checking, depending on the run, and every answer comes with a receipt you can check later.

pip install arcezia

Your agent doesn’t write text anymore. It takes actions.

It runs commands, edits files, calls APIs, moves money, deploys to production. Everything guarding it still reads text — the prompt and the reply. But a perfectly innocent request, “show me recent login stats”, can produce an action that deletes a table. The words look fine. The consequence is irreversible.

Every action your agents take is already in one of two states. Either you are trusting that the agent did the right thing and finding out afterwards, or you have proof the action was allowed before it ran — a deterministic verdict and a signed certificate you can hand to an auditor. There is no third state. The only question is which one you can prove.

Real failures from production, 2024–2026

Each one is a sequence of tool calls that looked fine in isolation.

• An AI coding agent deleted a production database mid-session.
• AI coding assistants wrote secrets to debug logs, committed them, and shipped them to the remote.
• An airline chatbot offered a refund policy that did not exist. A tribunal ordered the airline to honour it.

Four checks. Each one catches what the others miss.

• The gate — every action is checked before it runs.
• The memory — what happened earlier in the session still counts.
• The double-check — the evidence is verified outside the agent.
• The look-ahead — where this sequence of steps ends up.

Works with the tools you already use

LangChain, OpenAI function calling, Anthropic tool use, CrewAI, AutoGen, LlamaIndex, and MCP for Claude Code and Cursor. Covers database operations, payments, email, filesystem, PII and API calls.

Read more

• Developer documentation — install the SDK and verify your first tool call
• The AI agent fabrication benchmark
• The AI agent refunded $2,400 for an order that never existed

Arcezia is in private beta. Not SOC 2 audited yet — we say so before you ask.

Unpacking...