AppSentinels named a leader and outperformer in 2025 GigaOm Radar for API Security – View the Report

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Discover Every API Across Your Entire Attack Surface

Automatically discover and inventory every API across your environment, uncover hidden attack surfaces, and continuously monitor, assess, and secure them.

See API Discovery & Posture Management in Action

From Unknown APIs to a Fully Governed Inventory

Continuously discover, classify, and monitor every API across your environment, turning an unmanaged attack surface into a governed, risk-ranked inventory.

Automated API Discovery & Classification

  • Complete API inventory: Discovers LLM, shadow, orphan, and unused APIs across your environment, in real time.
  • Authentication and privilege mapping: Classifies APIs by unauthenticated access, sensitive data, and admin-level privilege.
  • Change and drift detection: Flags new, modified, or deprecated APIs the moment they change.
  • Third-party visibility: Extends discovery to partner and supply-chain APIs outside your codebase.

Sensitive & PII Exposure Detection

  • Automatic PII identification: Scans live traffic to flag PII, payment data, and other sensitive fields.
  • Data flow mapping: Traces where sensitive data enters, moves, and exits across APIs.
  • Exposure risk alerts: Flags sensitive data moving without adequate auth or encryption.
  • Compliance-ready visibility: Maps exposure to PCI DSS, GDPR, and HIPAA for audit reporting.

Auto-Generated Specs & Governance Insights

  • Auto-generated OpenAPI specs: Builds accurate specs directly from observed traffic, no manual work.
  • Governance gap detection: Flags APIs that break naming conventions or approved schemas.
  • Misconfiguration insights: Surfaces missing auth, weak rate limits, and verbose errors early.
  • Spec-to-runtime conformance: Checks live behavior against approved specs to catch drift.

Real-Time API Risk Scoring

  • Dynamic risk scoring: Scores every API in real time by exposure, sensitivity, and impact.
  • Prioritized remediation: Ranks APIs so teams fix the highest-risk ones first.
  • Continuous reassessment: Recalculates risk as APIs and traffic patterns change.
  • Business Logic Graph context: Ties scores to the workflows and data each API touches.

Stop Guessing What’s Running in
Your API Estate

Get a live view of every API, its risk score, and its exposure, in one platform

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Frequently Asked Questions

What is API discovery and posture management?
API discovery and posture management is the continuous process of finding every API across an environment, classifying it by risk factors like authentication and data sensitivity, and monitoring its configuration over time. AppSentinels automates this end to end, replacing periodic manual audits with real-time visibility into the full API attack surface.
AppSentinels analyzes live API traffic rather than relying on registered inventories or developer-submitted lists. This lets it surface shadow APIs never documented, orphan APIs left behind after ownership changes, and unused endpoints still exposed but no longer maintained, all without requiring code instrumentation.
Yes. AppSentinels inspects request and response payloads as traffic flows through your APIs, identifying PII, payment data, and other sensitive fields the moment they appear. Exposure is flagged immediately rather than discovered during a periodic scan or after an incident.
Yes. AppSentinels classifies LLM and AI APIs alongside traditional REST and internal APIs as part of the same discovery process, extending visibility to model endpoints, agent tool calls, and MCP-connected services that legacy API inventories typically miss.
AppSentinels calculates risk by combining exposure factors such as authentication status and public reachability, the sensitivity of data an API handles, and the likely business impact if it were compromised. The score recalculates automatically as APIs change, so prioritization always reflects current conditions rather than a point-in-time assessment.