n8n · Agent Guardrails

Add Runtime Guardrails to an n8n Workflow

Stop risky agent actions before they execute.

Redlynr adds a pre-action runtime decision to an n8n workflow. Send the proposed action to Redlynr before execution and route the workflow based on one of three responses:

proceed · slow_down · stop

No custom n8n node required.

How it works

How it works

The starter workflow places Redlynr directly in front of the action you want to protect:

Prepare Action Redlynr Guardrail Decision Router
proceed
Execute the protected action
slow_down
Route for slowdown handling
stop
Block the protected action

The included workflow is intentionally simple so you can replace the example protected action with an API call, AI-agent step, database operation, notification, external tool, or other n8n action.

Starter workflow

Redlynr Guarded Action — n8n Starter Workflow

The downloadable workflow includes:

  • Prepared Redlynr request fields
  • POST request to https://redlynr.com/run
  • X-Trial-Token placeholder
  • Routing for proceed
  • Routing for slow_down
  • Routing for stop
  • Example protected-action branch
  • Example blocked-action branch
No Redlynr credentials or account information are included in the download.
Download Starter Workflow (.json)
Free trial

Try it with 30 free calls

30 free calls — no subscription required

You do not need a subscription to test the integration.

Redlynr provides 30 free /run calls using a trial token. Generate your token, replace YOUR_TENANT_ID and YOUR_TRIAL_TOKEN in the starter workflow, and run it in n8n.

Why before the action?

Why put the guardrail before the action?

Agent and automation failures become expensive when the system acts first and evaluates later.

Redlynr sits before execution and evaluates runtime conditions such as cost pressure, chain depth, steps and retries, repetition, tool fixation, and request volume.

The workflow gets a structured decision before the protected action runs.

Should this action continue?

That is the question Redlynr is designed to answer.

Integration

Built for orchestration, not just n8n

The n8n starter workflow is an implementation example, not a separate Redlynr product.

Redlynr is a REST API and can sit in front of actions executed by:

n8n agent frameworks custom orchestrators API workflows background jobs internal automation

If your system can make an HTTP request before taking an action, it can use Redlynr.

Put a guardrail in front of your next action.

Start with the n8n workflow or integrate the Redlynr API directly.