Nessus / Tenable.io Vulnerability Scanner API
Tenable.io REST API (Nessus-powered) for vulnerability management platform. Enables AI agents to manage vulnerability scan creation, scheduling, and configuration, handle scan result retrieval and vulnerability data processing, access asset inventory and discovery management, retrieve CVE and vulnerability severity scoring data, manage compliance policy scan configuration and results, handle remediation workflow and ticket integration, access vulnerability trend and risk score analytics, retrieve plugin update and policy configuration data, manage scan template and policy management, and integrate vulnerability data with SIEM, SOAR, CMDB, and ticketing platforms for remediation workflows.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Vulnerability management. SOC2, ISO27001, FedRAMP. API key pair. US/EU. Asset vulnerability and CVE scan data.
⚡ Reliability
Best When
An enterprise using Tenable.io or Nessus Pro wants AI agents to automate scan orchestration, vulnerability triage, remediation ticket creation, risk scoring, and CMDB asset synchronization.
Avoid When
OPERATIONAL RISK: Automated vulnerability scans on production systems can cause service disruptions — safe scan templates and change management windows are required. Automated scanning of third-party infrastructure without authorization is illegal.
Use Cases
- • Automating vulnerability scan scheduling from security operations agents
- • Processing scan results for remediation prioritization from SecOps agents
- • Integrating vulnerability data with ServiceNow from remediation workflow agents
- • Monitoring asset vulnerability trends from risk management agents
Not For
- • Web application DAST scanning without network vulnerability focus (use Burp Suite/ZAP)
- • Source code scanning without infrastructure vulnerability context
- • Consumer vulnerability tools without enterprise VM platform requirements
Interface
Authentication
Tenable.io uses API key authentication with X-ApiKeys header (accessKey and secretKey pair). Account-level API keys from platform settings. Developer documentation at developer.tenable.com. Python SDK (pytenable). No native webhooks — polling for scan completion. Nessus (on-premises) and Tenable.io (cloud) use same API pattern. Tenable.sc (SecurityCenter) has separate API.
Pricing
Columbia, Maryland. Founded 2002. NASDAQ: TENB. Vulnerability management market leader. $700M+ annual revenue. Nessus scanner has 2M+ installations. Tenable.io cloud platform for enterprise VM. Tenable OT Security for industrial. 44,000+ customers globally. Competes with Qualys and Rapid7 for enterprise VM.
Agent Metadata
Known Gotchas
- ⚠ OPERATIONAL RISK: Vulnerability scans on production systems can cause service disruptions — always use safe scan templates and change management windows
- ⚠ Scan completion is async — launch scan returns scan ID; poll status endpoint for completion before retrieving results
- ⚠ Rate limit documented (200/min) — implement request throttling for bulk scan operations
- ⚠ Two API keys required — accessKey and secretKey both required in X-ApiKeys header; both must be valid
- ⚠ Nessus vs Tenable.io vs Tenable.sc — three separate products with related but different APIs; verify target platform
- ⚠ No native webhooks — implement polling loop with exponential backoff for scan completion detection
Alternatives
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Scores are editorial opinions as of 2026-03-07.