Your systems hear about it the moment it happens.
Nucleus delivers signed events on job completion and endpoint activity to your HTTPS endpoint. Every delivery is retried until your server acknowledges it.
Every event, signed
Each delivery carries an HMAC-SHA256 signature computed from your secret, so your handler verifies the request came from Nucleus.
Retried until acknowledged
A delivery that receives anything other than a 2xx is retried with exponential backoff for up to 72 hours.
One registration, every resource
Subscribe to job, checkpoint and endpoint events from a single webhook endpoint, scoped by an admin key.
Every event your systems can listen for
A fine-tuning job emits events as it moves through its lifecycle. Register your endpoint for the events you care about, and Nucleus calls it each time one fires.
Results from LLMs powered by Nucleus
incidents past their four-hour SLA
sweep of the tracking feed
downtime prevented this month
Every incident past its four-hour SLA, escalated by name
Every shipment two days past ETA, found before the customer called
Line 3's next failure, booked into the maintenance window
What webhooks include
Events
- Job lifecycle: queued, running, succeeded, failed, cancelled
- Checkpoint events: created, published
- Endpoint events: created, scaled, deleted
Security
- HMAC-SHA256 signed payloads
- HTTPS endpoints only
- Admin scope required to register
Delivery
- Exponential backoff retries
- Retries for up to 72 hours
- Stable event IDs for deduplication
Webhooks
Webhooks are included with the platform. There is no separate charge for event deliveries.
Pick your path
Harness
Permissions, scoped keys and audit
On-Premise Deployment
Our GPU servers, your site
Tool use
Your private APIs as skills
MCP
Your model in your tools
RAG
Answers from your documents
Go deeper
Wire your systems into the platform.
Start receiving signed events the moment your jobs complete.