What is a VMS REST API and webhook integration?
A VMS REST API is the programmable interface that lets external systems manage cameras, subscribe to events, export clips, configure analytics, and pull audit logs from a video management system over HTTP. Webhooks are the push side: the VMS sends a signed, real-time message to a customer endpoint whenever a camera event, AI alert, operator action, or configuration change occurs. Together they let a VMS integrate with physical access control, SIEM/SOAR, building management, and business-intelligence systems instead of running as an island. Secure integrations use OAuth 2.0 or OIDC, enforce rate limits, and verify signed payloads. VMukti exposes REST APIs for camera, event, clip, analytics, and audit operations with OAuth 2.0 / OIDC authentication, a 600 requests-per-minute default limit, and signed webhooks with at-least-once delivery and retry.
Two halves of integration: pull and push
A VMS that cannot integrate becomes a silo. Modern platforms expose two complementary mechanisms. The REST API is the pull side — an external system calls the VMS over HTTP to do something or fetch something. Webhooks are the push side — the VMS calls the external system the instant something happens. Most real integrations use both.
What a REST API lets you do
- Camera management — enrol, configure, and query cameras and their status programmatically.
- Event subscription — register interest in event types (motion, AI alert, tamper) and retrieve them.
- Clip export — request and download evidential clips with metadata for case management.
- Analytics configuration — set zones, rules, and thresholds for AI models without using the UI.
- Audit-log retrieval — pull the immutable action log into a SIEM or compliance system.
What webhooks add
Polling an API for new events is wasteful and slow. A webhook delivers the event the moment it occurs: the VMS sends a signed payload to a customer URL, which lets a SIEM open a ticket, a SOAR runbook execute a response, or an access-control system bookmark a camera — all in real time. Reliable webhook design uses signed payloads (so the receiver can verify authenticity), at-least-once delivery, and automatic retry.
Security and limits
A production integration authenticates with OAuth 2.0 client-credentials (machine-to-machine) or OIDC-federated tokens (operator-driven calls), never with static API keys in the clear. Rate limits protect the platform from runaway clients, and signed webhook payloads protect the receiver from spoofed events. Traffic should run over TLS, ideally on a private link for control-plane calls.
Common integrations
VMS APIs and webhooks most often connect to physical access control (badge swipe drives a camera bookmark and an AI tag), SIEM and SOAR (Splunk, Sentinel, Chronicle, QRadar; Palo Alto XSOAR, Microsoft Defender XDR), building-management systems, and business intelligence for footfall and operational analytics.
How VMukti delivers it
VMukti exposes REST APIs for camera management, event subscription, clip export, analytics configuration, and audit-log retrieval. Authentication is OAuth 2.0 client-credentials or OIDC-federated tokens; the default limit is 600 requests per minute per client with burst handling. Webhooks deliver real-time event push with signed-payload verification, at-least-once delivery, and retry, with native connectors for the major access-control, SIEM, and SOAR platforms — across an ONVIF, hardware-agnostic platform spanning 1,000+ camera models.
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Last reviewed: 2026-06-19