OpenText ArcSight SIEM API
OpenText ArcSight SIEM (Security Information and Event Management) REST API for enterprise security event correlation, threat detection, and compliance reporting. Enables AI agents to manage security event ingestion and correlation for automated threat detection, handle ESM (Enterprise Security Manager) case management and security incident workflow, access real-time active channel query for streaming security event analysis, retrieve correlation rule management for SIEM tuning automation, manage connector integration and log source management for SIEM data pipeline operations, handle active list management for dynamic threat intelligence list updates, access dashboard and report generation for security compliance reporting, retrieve threat intelligence integration and IOC management for threat enrichment, manage user behavioral analytics and anomaly detection alerting, and integrate ArcSight with SOAR platforms, threat intelligence feeds, and ticketing systems.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Enterprise SIEM. FedRAMP, SOC2, ISO27001. OAuth2/API key. US/EU/Global. Security event and correlation data.
⚡ Reliability
Best When
A large enterprise, government agency, or MSSPs wanting AI agents to automate ArcSight SIEM event correlation, case management, correlation rule tuning, threat intelligence integration, and security operations workflow.
Avoid When
SIEM RULE MODIFICATION IN PRODUCTION: Automated correlation rule modification or deletion in production ArcSight environment can create detection blind spots; automated rule changes must go through change management and testing in non-production environment before production deployment. Active list automation for blocking — automated active list updates that trigger network blocking (firewall ACL sync) must include human approval for broad blocking actions; automated blocking of IP ranges without analyst review creates legitimate traffic blocking and operational disruption. Case escalation SLA automation — automated case escalation based on SIEM priority must account for false positive rate; automated escalation of SIEM alerts without analyst triage creates alert fatigue and analyst burnout. Log source management in regulated environments — automated log source addition or modification in PCI-DSS or HIPAA-regulated SIEM environment requires change control documentation; automated log source changes without change control create compliance audit finding.
Use Cases
- • Correlating security events from SOC automation agents
- • Managing SIEM cases from incident response agents
- • Tuning correlation rules from threat detection agents
- • Generating compliance reports from security reporting agents
Not For
- • SMB security without enterprise SIEM requirements
- • Cloud-native log analytics (use Elastic or Splunk Cloud)
- • Endpoint detection and response (use CrowdStrike or SentinelOne)
Interface
Authentication
ArcSight uses API key and OAuth authentication. REST API with JSON and proprietary formats. Waterloo, Ontario HQ (OpenText, NASDAQ: OTEX). Originally HP ArcSight; acquired by Micro Focus 2017; OpenText acquired Micro Focus 2023. Enterprise SIEM leader for 20+ years. FedRAMP authorized. Used by Fortune 500 and government. 6,000+ enterprise customers. Competes with Splunk, IBM QRadar, and Microsoft Sentinel for enterprise SIEM.
Pricing
Waterloo Ontario. OpenText NASDAQ:OTEX. Originally HP ArcSight. Micro Focus acquisition 2017, OpenText acquisition 2023. FedRAMP authorized. 6,000+ enterprise customers. EPS-based licensing.
Agent Metadata
Known Gotchas
- ⚠ CORRELATION RULE CHANGE MANAGEMENT: Automated ArcSight correlation rule modification or deletion must go through formal change management and non-production testing; automated rule changes in production SIEM can create detection blind spots for active threats; implement change control gate for all rule automation
- ⚠ OpenText acquisition API stability — ArcSight has changed ownership three times (HP → Micro Focus → OpenText); API versioning and support policy may have shifted; verify current API support status and migration roadmap before new integration investment
- ⚠ ESM query complexity and timeout — ArcSight ESM complex correlation queries against large event datasets can timeout; automated security analytics queries must include time-bound and field-specific filters; unbounded queries create ESM performance degradation
- ⚠ No webhooks — ArcSight ESM does not support native webhooks for security event push; SOAR integration requires polling active channels or using Forwarding Connector; implement event polling with appropriate interval for SOC SLA requirements
- ⚠ Active list automation blocking risk — automated active list updates that trigger downstream network blocking (via SmartConnector integration) must include rate limiting and human approval gate for broad blocking actions; automated IP blocking without review creates legitimate traffic blocking
- ⚠ On-premise ESM network dependency — ArcSight on-premise ESM API requires network access to ESM server; cloud AI agents need VPN or reverse proxy to access on-premise ArcSight; plan network architecture before cloud-to-on-premise integration
Alternatives
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Scores are editorial opinions as of 2026-03-07.