performing-api-inventory-and-discovery
Performing API Inventory and Discovery
When to Use
- Mapping the complete API attack surface of an organization before a security assessment
- Identifying shadow APIs deployed by development teams without security review
- Discovering deprecated or zombie API versions that remain accessible but unmaintained
- Finding undocumented API endpoints exposed through mobile applications, SPAs, or microservices
- Building an API inventory for compliance requirements (PCI-DSS, SOC2, GDPR)
Do not use without written authorization. API discovery involves scanning network infrastructure and analyzing traffic.
Prerequisites
- Written authorization specifying the target domains and network ranges
- Passive traffic capture capability (network tap, proxy, or cloud traffic mirroring)
- Active scanning tools: Amass, subfinder, httpx, and nuclei
- JavaScript analysis tools: LinkFinder, JS-Miner, or custom parsers
- Access to cloud console (AWS, Azure, GCP) for API gateway inventory
- Burp Suite Professional for passive API endpoint discovery
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