Alternatives to 42Crunch for CISO API inventory heatmap

For CISOs maintaining an accurate API inventory, the primary requirement is a repeatable way to assign a meaningful risk score and surface the most urgent issues first. middleBrick assigns a letter grade from A to F and returns prioritized findings so teams can focus remediation effort where it matters most. The scanner evaluates 12 categories aligned to the OWASP API Top 10 2023, including authentication bypass, broken object level authorization, excess data exposure, and injection surfaces. Each finding includes severity, location, and concise remediation guidance that maps findings to the relevant control objective.

Because the approach is black-box, the scanner validates runtime behavior without requiring source code, agents, or SDK integration. It supports any language, framework, or cloud deployment and completes in under a minute using read-only methods plus text-only POST for LLM probes. Detection coverage includes authentication misconfigurations such as JWT alg=none or missing claims, BOLA and IDOR via sequential ID and adjacent ID probing, BFLA and privilege escalation attempts, property over-exposure, input validation issues like CORS wildcard with credentials, and unsafe consumption of excessive third-party URLs. The LLM security module runs 18 adversarial probes across Quick, Standard, and Deep tiers to assess system prompt extraction, jailbreak techniques, data exfiltration, token smuggling, and indirect prompt injection.

middleBrick parses OpenAPI 3.0, 3.1, and Swagger 2.0 documents with recursive $ref resolution, then cross-references spec definitions against live runtime behavior. This highlights undefined security schemes, deprecated operations, sensitive fields in responses, and missing pagination that may contribute to data exposure or performance issues. The correlation helps CISOs verify that published contracts reflect actual behavior and supports audit evidence for controls described in SOC 2 Type II and PCI-DSS 4.0. Note that the tool surfaces findings relevant to these frameworks but does not certify compliance.

Authenticated scans are available from the Starter tier onward, supporting Bearer tokens, API keys, Basic auth, and cookies. Access requires domain verification via DNS TXT record or an HTTP well-known file so that only the domain owner can submit credentials. When credentials are provided, the scanner forwards a strict header allowlist limited to Authorization, X-API-Key, Cookie, and X-Custom-* headers. This design reduces noise and enforces a consistent security posture across inventory scans.

Pro tier adds continuous monitoring with scheduled rescans every 6 hours, daily, weekly, or monthly. It performs diff detection across scans to highlight new findings, resolved findings, and score drift, ensuring that changes in the API surface are noticed promptly. Alerts are rate-limited to one per hour per API and can be delivered via email or HMAC-SHA256 signed webhooks that auto-disable after five consecutive failures. This helps CISOs maintain an up-to-date inventory and demonstrate progress in reducing the API risk profile over time.