Policy evaluation engine
The validation engine evaluates every proposed action against versioned policy before execution. Deterministic. The same action evaluated twice against the same policy always returns the same decision.
DataCrawl sits before execution in any system that moves data or takes actions — and evaluates whether what is about to happen should happen.
The most pressing application of that infrastructure right now is AI agents. Agents that issue refunds, update records and send communications on your behalf — with no verification layer between intention and execution.
DataCrawl changes that. One integration point. Works with any agent or automation. Nothing gets rebuilt.
Free tier available. No credit card required.
Action proposed
Agent, workflow or system submits what it intends to do.
Validation engine runs
Policy evaluated. Decision returned before anything executes.
Audit trail written
Trace ID, policy version, payload and outcome retained.
The architecture
The core is simple: observe what normal looks like, detect when something deviates, repair what is safe to repair and enforce a decision before execution. This architecture applies anywhere data moves through a system without a human in the loop.
The engine learns what correct payloads and actions look like from real traffic. No hand-written schema required. The baseline emerges from the system's own behaviour over time.
Every subsequent payload is compared against the baseline. Missing fields, type changes, value drift and structural differences each produce a deviation score. A high score means something has meaningfully changed.
Where deviations are unambiguous — a number arriving as a string, a required field missing with a known safe default — the engine corrects the payload automatically and logs every change made.
Payloads that cannot be repaired with confidence are held for human review or blocked outright depending on enforcement mode. Nothing ambiguous reaches execution.
The enforcement mode determines how strict the engine is. Log-only captures everything without blocking. Conservative applies confident repairs and holds the rest. Strict blocks anything that does not pass cleanly.
The application
Agents are not just sending data through a pipeline. They are proposing actions — issuing refunds, updating customer records, triggering downstream systems — at machine speed, with no human between intention and execution.
The validation engine that catches payload drift in a webhook is the same engine that catches an agent trying to issue a $2,400 refund it was never authorized to approve. The architecture is the same. The stakes are higher.
Without the validation layer
With the validation layer
What the audit trail captures
Teams are deploying agents that issue refunds, update records and send communications on their behalf. Most have no validation layer between the agent and execution.
An agent issues a $2,400 refund in 50 milliseconds. You find out from the customer. By then, the action is done.
Five agents from three different frameworks means five separate guardrail implementations with no shared policy, no shared audit trail, and no shared anything.
Which agent? Which version? Which policy was active? What data did it have? Without a validation layer, these questions do not have answers.
The question is not whether you trust your AI agents. It is whether you have infrastructure to verify that trust, action by action, at runtime.
Applying the architecture to AI agents
The agent registry, typed action contracts and approval workflows are how the validation engine surfaces when applied to AI. One integration point. Nothing gets rebuilt.
Connect any agent to DataCrawl via API. LangChain, AutoGen, n8n workflows, custom scripts. Assign capabilities and risk tier. The agent receives a key. The agent code itself does not change.
Typed action policies map to the validation engine's enforcement rules. ISSUE_REFUND under $50 passes autonomously. Over $50 requires approval. Policy is versioned and evaluated deterministically every time.
The agent submits a proposed action. The engine evaluates it and returns a structured decision: ALLOW, REQUIRE_APPROVAL, ESCALATE or DENY. Every decision is logged with a trace ID and the exact policy version that evaluated it.
Four capabilities that come directly from applying the validation architecture to agent deployments.
The validation engine evaluates every proposed action against versioned policy before execution. Deterministic. The same action evaluated twice against the same policy always returns the same decision.
High-risk actions do not auto-execute. They pause for a human reviewer who sees the full payload, the policy that flagged it and the agent that proposed it. One click to approve or deny. The engine waits.
Agents are registered as first-class identities in the system. Each one carries a defined set of authorized action types, a risk tier and a key. Actions outside the registered scope are blocked before validation even runs.
Every evaluation writes a record: trace ID, agent identity, action payload, the policy snapshot that was active at that exact moment and the outcome. Not a log — a reproducible record of why a decision was made.
Observability tools record what happened. Agent-side guardrails protect one agent at a time. Neither is a validation layer that sits before execution across your entire agent fleet.
| Approach | Scope | Agent registry | Policy engine | Approval flow | Audit trail | Framework-agnostic | Reality |
|---|---|---|---|---|---|---|---|
| No governance (status quo) | Your risk | ✘ | ✘ | ✘ | ✘ | ✔ | Agents act. You find out from a customer. Then you dig through logs and guess what happened. |
| Agent-side guardrails | Per-agent | ✘ | ~ | ✘ | ✘ | ✘ | Works only on agents you built. No shared policy. No central audit. Five agents means five different guardrail systems. |
| LLM observability (LangSmith, Langfuse) | Trace only | ✘ | ✘ | ✘ | ~ | ~ | Tells you what happened after. Cannot stop an action before it executes. No approval chain. |
| Custom approval workflows | Internal | ✘ | ~ | ~ | ~ | ✘ | Brittle. Tied to one framework. No policy versioning. Breaks when agents change. Becomes its own maintenance burden. |
| DataCrawl | Early | ✔ | ✔ | ✔ | ✔ | ✔ | Purpose-built validation infrastructure. Sits before execution. Works with any agent framework. Every decision is traced and versioned. |
Governance requirements are not asking for agent-side guardrails. They are asking for verifiable oversight infrastructure. That is what DataCrawl provides.
EU AI Act
Human oversight of high-risk AI decisions
Article 9 requires human oversight mechanisms. The approval workflow in DataCrawl is that mechanism — an interruption point before execution where a human makes the call.
SOC 2 Type II
Audit trail retention and access controls
Every governance decision is logged with the exact policy version that evaluated it. One export provides the full evidence trail an auditor needs.
ISO 42001
AI management system requirements
Risk tiering, policy versioning and agent capability controls map directly to ISO 42001's AI governance management requirements without additional tooling.
Questions about the architecture, the agent application and how DataCrawl fits into your existing stack.
Still have questions?
Get started
A validation layer between your agents and execution is not a future project. It is the missing piece in what you are already deploying. One integration point. No rebuild required.
Free tier available · No credit card required · Works with any agent framework