Agent verification infrastructure

Prove every agent action before it happens.

Define what your agents may mean and do as an ontology. We compile it into a gate on every LLM tool call — with a readable proof of why it passed, failed, or needs a human.

Get the gate See a proof trace

The problem

Prompts are not a control plane.

Production agents call tools that charge cards, mutate systems of record, and message customers. Teams either keep agents in a sandbox forever or ship and hope.

There is no compile-to-gate path — until now.

How it works

Author. Compile. Gate.

Velstack is agent automation and verification infrastructure. You write policy once. We sit in front of any tool call and return a decision you can audit.

  1. 01

    Author

    Policy as ontology: entities, allowed actions, constraints, evidence requirements.

  2. 02

    Compile

    Verification compiler turns policy into runtime gate artifacts.

  3. 03

    Gate

    SDK wraps each tool call → pass / fail / needs-human + proof trace.

Three-step flow: author policy as ontology, compile to gate artifacts, gate each tool call with pass, fail, or needs-human plus proof trace.

Product surfaces

Four parts of the gate path.

Ontology / policy language

Typed meaning and allowed actions — what agents may mean and do.

Verification compiler

Policy → gate artifacts. Versioned, testable, reproducible.

Runtime gate (SDK)

Wrap tool calls; get pass / fail / needs-human + proof.

Control plane

Versions, traces, human-approval queues, audit export.

Who it's for

Platform teams already running agents with write-capable tools.

Buying trigger: the first tool call that can charge, refund, book, delete, escalate, or send — and someone asks how do we prove that was allowed?

  • Head of Platform / Staff+ eng — owns the agent runtime
  • Security / GRC — economic or blocking buyer; not alone
  • Ops / Support lead — pain owner / champion

Mechanized trust for agents other people already run — not another agent. Not prompt-only governance. A gate on the call path with evidence.

Proof trace

Disallowed path blocked. Allowed path passes.

Mini demo: a refund tool call fails without manager approval, then passes when approval evidence is present — with a readable proof of which rule fired.

Side-by-side proof traces: refund tool call fails without manager approval, then passes when approval evidence is present.

Get started

Ship agents that can write — without shipping hope.

Start with one gated tool call. Design partners welcome — early stage, building with teams who feel the blast radius.

Talk to us Start with one gated tool call

support@velstack.ai