InterceptAI · open source

The SQL firewall for AI agents.

Your AI agent should not hold a database connection. Terminus does, and decides what every query is allowed to run. An open-source, default-deny MCP server (or HTTP sidecar): per-agent identity, a verifiable audit trail, and a safe rewrite when it says no. Guard what your agents do, not just what they say.

Attack success 46.7%0.0% Same model, same attacks, run with and without Terminus. Enforced, none succeeded.
Legitimate work blocked 0.0% Benign agent queries wrongly denied across a 300-query corpus. It does not get in the way.
Decision latency <2ms p99 In-process decision on the validation harness. It sits in the request path without being felt.

How it works

Default-deny on every query. Allow, deny, or a safer rewrite, before anything runs.

Unbypassable by construction.

Terminus runs as the MCP server your agent calls, exposing only query and execute. The agent never receives a connection string; the executor alone holds credentials and runs nothing the policy engine did not already allow. High-risk writes wait for a human.

Govern the action.

A default-deny policy, schema and column whitelist, and smuggling detection, gated by per-agent identity. Each agent can only run what you allowed it.

Provable, not just logged.

Every decision lands in a tamper-evident, independently verifiable audit chain. Raw SQL is never stored, only a keyed digest. The evidence an EU AI Act or SOC 2 auditor asks for.

Fix, do not just block.

A deny returns a policy-compliant rewrite, re-validated through the same engine, so the agent retries and keeps working instead of failing blind.

Open core

Read every line. Self-host it. Put it in your critical path without depending on anyone.

The enforcement core is free and open under AGPL-3.0: the sidecar, the MCP enforcement point, the policy engine, per-agent identity, remediation, and the local verifiable audit chain. A security control you cannot read is a security control you cannot trust.

The commercial Terminus control plane is for teams operating this across a fleet: a least-privilege autopilot that learns each agent's access and tightens its policy for you, central approvals, and an audit witness that routes to your own SIEM. On the roadmap.

Design partner program

It is early. The first design partner is free.

If your team is giving an AI agent broad-read or write access to a production database, put Terminus in front of it and see what it catches. Free, in exchange for public feedback and a few warm intros.