What are webhooks and what can they do

Webhooks let you send your social data — posts, reactions, comments, contacts, job changes, and AI Agent outputs — to any external system in real time. If you can accept an HTTP POST request, you can receive data from your Signals.

Written By Kevin Lawrie

Last updated About 24 hours ago

The core idea

Every time your Signal runs and finds something new, a webhook can instantly push that data to a URL you control. Your CRM, your data warehouse, your custom app, your automation platform — anything that can receive a JSON payload over HTTPS can be a webhook destination.

Unlike the built-in integrations (HubSpot, Instantly, Smartlead, etc.) which push contacts in a structured way to specific platforms, webhooks are open-ended. You decide what happens with the data on the receiving end.

What can be sent via webhook

Webhooks can carry every type of data your Signals produce:

		Data type When it's sent Format
Posts	As each post is discovered by a Signal	One HTTP call per post
Reactions	When Capture Post Reactions runs	Batched — up to 50 per call
Comments	When Capture Post Comments runs	Batched — up to 50 per call
Enriched contacts	When a contact is saved and enriched	One HTTP call per contact
Job changes	When a job change is detected	One HTTP call per change
YouTube videos	When a YouTube Signal finds new videos	One HTTP call per video
Reddit posts	When a Reddit Signal finds new posts	One HTTP call per post
AI Agent outputs	When an AI Agent Send to Webhook action fires	One HTTP call per item processed

How webhooks work

Webhooks accept any valid HTTPS endpoint. The platform sends structured JSON payloads via HTTP POST to the URL you provide. Use them for custom apps, automation platforms (Make, Zapier, n8n), data warehouses, CRMs, or any system that can receive an HTTP request — including Clay.

Where webhooks fit in the platform

Webhooks are created once in Integrations → Webhooks and then assigned wherever you need them:

Signal Configure step — assign a webhook to receive posts, reactions, comments, contacts, or job changes as the Signal runs
Contacts manager — manually push selected contacts to a webhook
AI Agent actions — fire a webhook when an agent's conditional rule is triggered, with the AI's output included in the payload

Failure handling

If a webhook endpoint returns an error or is unreachable, the platform retries delivery. After 3 consecutive failures, the webhook is automatically disabled and you receive an alert email. Re-enable it from Integrations → Webhooks once your endpoint is back up.

All webhooks require HTTPS endpoints.