How does webhook signature verification work?

Each webhook configuration has a secret key. SendKit signs every payload with this key. On your end, you verify the signature to confirm the request is authentic.

Can I configure webhooks per campaign?

Yes. Webhooks are set up at the campaign level. Different campaigns can have different endpoints and different event subscriptions.

webhooks

Push campaign events to any endpoint

Fire webhooks when leads are created, added, reply, bounce, or when emails are sent or opened. Per-campaign configuration with signature verification via secret key.

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webhook features

Real-time events, zero polling

Per-campaign configuration

Each campaign can have its own webhook endpoints and event subscriptions. Keep things organized.

Signature verification

Every webhook includes a signature generated from your secret key. Verify that payloads are genuinely from SendKit.

Six event types

lead.created, lead.added, lead.replied, lead.bounced, email.sent, and email.opened. Subscribe to exactly what you need.

Standard HTTP delivery

Webhooks fire to any HTTP endpoint. Works with CRMs, automation platforms, and custom backends.

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integration flow

Events fire, your stack reacts

Add your endpoint URL

Point webhooks at any HTTP endpoint. Works with your CRM, Zapier, Make, n8n, or a custom backend. Each campaign can have its own webhook configuration.

Pick your event types

Subscribe to the events you need: lead.created, lead.added, lead.replied, lead.bounced, email.sent, or email.opened.

Verify with signature

Every webhook payload includes a signature you can verify with your secret key. Confirm that incoming requests are genuinely from SendKit.

CRM sync

Push reply and bounce events to your CRM the moment they happen. Your pipeline always reflects the latest campaign activity.

Custom automations

Trigger n8n or Make workflows when leads reply or emails bounce. Build any post-engagement automation you need.

Data warehouse pipeline

Stream campaign events to your data warehouse for custom reporting or attribution modeling.

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vs polling

Instant delivery, not batch delays

Per-campaign webhooks with signature verification

SendKit webhooks are configured per campaign, not globally. Each endpoint gets a secret key for signature verification so you can confirm payloads are authentic. Six event types cover the full lifecycle of a lead in your campaign.

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SendKit

vs Lemlist

SendKit

Six event types covering the full lead lifecycle

Subscribe to lead.created, lead.added, lead.replied, lead.bounced, email.sent, and email.opened. Configure different events per campaign. Every payload is signed with your secret key so you can verify authenticity on your end.

frequently asked questions

Got questions? We've got answers.

Six events: lead.created, lead.added, lead.replied, lead.bounced, email.sent, and email.opened. Each can be configured independently per campaign.

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