Agent A Told Agent B Something. Was It True?

Signed decision traces for every multi-agent systems decision your AI agent makes.

The Problem

When one agent passes a fact to another, that fact is trusted by default. One wrong assertion propagates through the system with no verification chain.

The Solution: A Signed Receipt

Every agent decision produces a cryptographically signed receipt. Immutable. Timestamped. Queryable.

// Every multi-agent systems decision gets a receipt:
{
"receipt_id": "rcpt_multi_agent_systems_8f3a",
"assertion": "agent believed [fact] at decision time",
"verification_score": 0.94,
"evidence_chain": [
{ "source": "context_snapshot", "span": "..." },
{ "source": "policy_state", "version": "2026-03-28T..." }
],
"signature": "ed25519:abc123...",
"timestamp": "2026-03-28T14:32:01Z",
"writer": "agent:multi-v1",
"immutable": true
}

When This Pays For Itself

"A researcher agent passed a wrong figure to an analyst agent. The analyst passed it to the executor. The executor acted. Three handoffs, zero verification."

With VerifiedState, you have the signed receipt. Without it, you have nothing.

Frequently Asked Questions

How does VerifiedState work with multi-agent systems? +

Install the @verifiedstate/sdk package and call client.ingest() after every agent decision. Each decision is cryptographically signed and returns a queryable receipt. Three lines of code to add verified memory to any multi-agent systems workflow.

What does a verified decision trace look like? +

A verified trace includes the assertion (what the agent believed), the evidence chain (what context it had), a verification score, and a cryptographic Ed25519 signature. All timestamped and immutable. Queryable via API.

Is VerifiedState free? +

Yes. The free tier includes 25,000 decision traces per month. No credit card required. Enterprise tiers are available for regulated industries that need higher volumes and compliance features.

Is VerifiedState production-ready? +

VerifiedState is currently in beta. It is suitable for development, testing, and early production workloads. Not yet certified for production use in regulated industries without independent compliance review.

Related Use Cases

Start Building Verified Multi-Agent Systems

Free tier: 25k decision traces/month. No credit card required.

Get Free API Key Read the Docs Talk to Enterprise Sales

Early access · For development and testing · Not certified for production use in regulated industries without independent compliance review