How do I set up Sentnl?

Enter your work email on the home page to generate a unique secure webhook URL, add an HTTP POST request action as the final step of your automation passing your AI text output in the body, and Sentnl will monitor for empty blocks or soft failures and email you immediately if a fix is required.

Which workflow automation platforms does Sentnl integrate with?

Sentnl integrates with Zapier, Make, n8n, and custom API scripts.

What is the free tier limit?

The free tier supports up to 500 client transactions per month with no credit card required and no expiration date.

Developer Tools

Sentnl

Protect your client retainers from silent AI failures

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Sentnl at a glance

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Sentnl metrics

Inspection sheet for sentnl.tech: Ahrefs Domain Rating and Majestic link metrics, with the delta since the last inspection.
Metric	Value
Domain Rating	2 +2 (up) since last check
Trust Flow	0 no change since last check
Citation Flow	5 no change since last check
Referring domains	20 no change since last check
External backlinks	24 no change since last check

Domain Rating by Ahrefs inspected 16 Oct 2026, adjusted 12 Oct 2026. Majestic inspected 6 Oct 2026, adjusted 6 Oct 2026. Link data: Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.

Sentnl domain diagnostics

Public RDAP record, last read 16 Oct 2026, 14:20 UTC.
Domain age	23 days
Registered	24 Sep 2026
Expires	24 Sep 2027
Registrar	Tucows Domains Inc.
DNSSEC	Not signed

Run the full check on sentnl.tech

Monitoring service that catches soft failures and empty responses in automated AI workflows before clients notice problems.

Overview

A look at sentnl.tech

Sentnl is a webhook-based monitoring service designed for AI agencies, freelancers, and automation builders. It monitors automated AI workflows in real time and alerts users instantly when issues occur, such as empty responses or refusal patterns from language models. The service integrates with workflow automation platforms like Zapier, Make, and n8n by adding a final HTTP POST request step. It detects empty or missing outputs, AI refusal patterns with phrases like "As an AI" or "I am unable to fulfill," and token limit errors, sending immediate notification emails with diagnostic information. The free tier supports up to 500 transactions per month with no credit card required and no expiration date.

Feature notes

Real-time transaction monitoring
Empty output detection
Instant email notifications
5-minute webhook setup
Integration with major automation platforms
No database required
Free tier with 500 transactions monthly

Pricing

Pricing model: Freemium

Free: 500 transactions per month, no credit card required

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FAQ

How do I set up Sentnl?: Enter your work email on the home page to generate a unique secure webhook URL, add an HTTP POST request action as the final step of your automation passing your AI text output in the body, and Sentnl will monitor for empty blocks or soft failures and email you immediately if a fix is required.
Which workflow automation platforms does Sentnl integrate with?: Sentnl integrates with Zapier, Make, n8n, and custom API scripts.
What is the free tier limit?: The free tier supports up to 500 client transactions per month with no credit card required and no expiration date.

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