Expel Managed Security REST API
Expel managed security operations REST API for enterprises to programmatically access Expel's transparent MDR service data — enabling AI agents to retrieve security investigations, manage remediation actions, access incident timelines, and integrate Expel SOC findings with enterprise security tools through Expel's WorkbenchTM platform API. Enables AI agents to manage investigation management for Expel security investigation retrieval and status tracking automation, handle remediation management for approved remediation action status and tracking automation, access alert management for raw security alert and investigation-linked alert retrieval automation, retrieve organization management for enterprise organization and integration configuration automation, manage comment management for investigation communication and analyst note retrieval automation, handle integration management for connected security tool and data source configuration automation, access vendor device management for integrated security vendor and device inventory automation, retrieve timeline management for investigation activity and decision timeline audit automation, manage notification management for investigation update and remediation approval webhook automation, and integrate Expel with SIEM, EDR, cloud security, and ITSM platforms for transparent MDR integration.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Transparent MDR. SOC2, GDPR. API key. US. Security investigation and analyst decision data.
⚡ Reliability
Best When
An enterprise security team with active Expel MDR service wanting AI agents to integrate Expel investigation data, remediation tracking, and SOC findings with internal security tools and ITSM platforms.
Avoid When
EXPEL MDR SERVICE IS REQUIRED: Expel API is exclusive to Expel MDR service customers; automated standalone-API assumption creates service_not_found for organizations without Expel service agreement; automated must have active Expel MDR service contract. REMEDIATION ACTIONS REQUIRE APPROVAL: Expel presents remediation recommendations; automated auto-remediate assumption creates unauthorized_action for remediation attempted without required customer approval through Expel Workbench; automated must implement remediation approval workflow. API REFLECTS EXPEL SOC DECISIONS: Expel investigation data reflects human SOC analyst decisions and context; automated rule-based assumption creates context_loss for integrations not preserving Expel analyst reasoning in escalation workflows; automated must preserve Expel investigation context in ITSM tickets. INTEGRATION CONNECTIONS REQUIRE CONFIGURATION: Expel needs configured connections to customer security tools (EDR, SIEM, cloud); automated instant-visibility assumption creates blind_spot for detection coverage from tools not yet connected to Expel platform; automated must verify all security tools are connected to Expel.
Use Cases
- • Retrieving Expel security investigations for correlation with internal security workflows for SOC automation agents
- • Tracking Expel remediation action approvals and completions for incident response automation agents
- • Integrating Expel MDR findings with internal ITSM for service ticket management automation agents
- • Auditing investigation timelines and analyst decisions for security governance automation agents
Not For
- • Self-managed SOC without Expel service (Expel API requires active Expel MDR service; organizations building their own SOC use SIEM platforms directly)
- • Threat intelligence platform replacement (Expel provides threat context within investigations; dedicated TIP platforms serve enterprise threat intelligence)
- • Compliance reporting platform (Expel monitors security threats; GRC platforms serve compliance framework management)
Interface
Authentication
Expel uses API key for Managed Security REST API. REST API with JSON. Herndon, VA HQ. Founded 2016 by Dave Merkel, Peter Silberman, and Justin Lundy. Raised $158M+. Products: Expel MDR (endpoint, cloud, SIEM, SaaS monitoring), Expel Workbench (SOC platform). Transparent MDR model showing all analyst work. 500+ customers. Industries: financial services, healthcare, technology, retail. Competes with Arctic Wolf, eSentire, and Deepwatch for enterprise transparent MDR.
Pricing
Herndon VA. $158M raised. 500+ customers. Annual MDR service subscription. Transparent SOC model.
Agent Metadata
Known Gotchas
- ⚠ INVESTIGATION STATUS LIFECYCLE: Expel investigations progress through open → in_progress → closed states with analyst comments at each stage; automated binary-open-closed assumption creates workflow_mismatch for integrations not handling investigation state transitions; automated must track investigation lifecycle transitions for accurate ITSM synchronization
- ⚠ REMEDIATION APPROVAL IS CUSTOMER ACTION: Expel presents remediation actions requiring customer approval in Workbench; automated auto-approve assumption creates action_not_executed for remediations pending customer approval; automated must implement approval notification and tracking workflow
- ⚠ CURSOR PAGINATION IS REQUIRED: Expel API uses cursor-based pagination for large result sets; automated page-number assumption creates missing_investigations for pagination not using Expel's cursor tokens; automated must use returned cursor tokens for correct pagination
- ⚠ WEBHOOK SIGNATURES MUST BE VALIDATED: Expel webhooks include HMAC signature for verification; automated skip-validation assumption creates security_risk for webhook processing without signature validation; automated must validate HMAC signature on all Expel webhook deliveries
- ⚠ INTEGRATION HEALTH AFFECTS COVERAGE: Expel investigation coverage depends on connected security tool health; automated stable-coverage assumption creates detection_gap for periods when connected tools (EDR, SIEM) have connectivity issues; automated should monitor Expel vendor device health status
Alternatives
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Scores are editorial opinions as of 2026-03-07.