APIsec vs Intruder: which is better?

Both tools scan externally available APIs without installing agents. The key difference is what each tool validates. middleBrick is a black-box scanner that sends only read‑only methods (GET and HEAD) plus text‑only POST for LLM probes, and it blocks destructive payloads at multiple layers. Intruder supports a broader set of active attack modules, including authenticated brute force, SQL injection, and command injection payloads that involve intrusive operations against the target.

Because middleBrick limits requests to safe methods, it is appropriate for environments with strict change controls or production systems that cannot tolerate write operations. Intruder’s extensive attack library makes it useful for deeper assessments where testers have explicit authorization to probe for injection and logic flaws. Teams that lack the capacity to manage noisy or disruptive scans may prefer the constrained behavior of middleBrick.

Neither tool replaces a human pentester for high‑stakes audits, but their coverage differs in practical ways. middleBrick maps findings to OWASP API Top 10 (2023), PCI‑DSS 4.0, and SOC 2 Type II, while Intruder focuses more on classic web application vulnerabilities. The choice depends on whether your program needs constrained, specification‑aligned scanning or a broader offensive testing surface.

middleBrick explicitly covers the OWASP API Top 10 (2023), including authentication bypass, BOLA and IDOR, BFLA and privilege escalation, property authorization over‑exposure, input validation such as CORS wildcard and dangerous HTTP methods, rate limiting and oversized responses, data exposure including PII and API key leakage, encryption and SSRF, inventory issues like missing versioning, unsafe consumption surface, and LLM/AI security across three scan tiers.

The scanner parses OpenAPI 3.0, 3.1, and Swagger 2.0 with recursive $ref resolution and cross‑references spec definitions against runtime findings. This helps teams identify undefined security schemes, deprecated operations, and sensitive fields that are missing from the spec but exposed in the implementation.

Intruder provides broad vulnerability coverage but does not specialize in API‑centric checks such as JWT misconfigurations, OAuth flows, or LLM adversarial probes. For organizations that need evidence aligned to API‑specific standards, middleBrick provides direct mappings to controls, whereas Intruder requires more manual correlation to frameworks such as PCI‑DSS 4.0 or SOC 2 Type II.

middleBrick supports authenticated scans at the Starter tier and above, with Bearer, API key, Basic auth, and Cookie methods. Domain verification is required, using either a DNS TXT record or an HTTP well‑known file, ensuring that only the domain owner can submit credentials. The scanner forwards a limited header allowlist: Authorization, X‑API‑Key, Cookie, and X‑Custom‑* headers.

Intruder also supports authenticated scans, but its configuration tends to be more flexible and complex, allowing custom login sequences and multi‑factor handling. If your team already has mature test accounts and CI/CD integration for credentialed scans, Intruder may offer fewer restrictions. Teams that want a simpler, governed authentication model with strict domain ownership checks may find middleBrick more predictable.

middleBrick completes scans in under a minute and enforces read‑only methods by default. Continuous monitoring is available in the Pro tier, with scheduled rescans every six hours, daily, weekly, or monthly, plus diff detection that highlights new findings, resolved findings, and score drift. Alerts are rate‑limited to one per hour per API and webhooks are HMAC‑SHA256 signed, with auto‑disable after five consecutive failures.

Intruder provides a wide range of scan templates and can integrate with issue trackers and SIEMs, but its default scans are more aggressive and time‑consuming. If your workflow depends on lightweight, frequent checks and auditable alerting, middleBrick’s monitoring model is designed for low noise. If you need highly customizable scan chains and deeper exploitation support, Intruder may be a better fit.

middleBrick offers a web dashboard for managing scans and viewing score trends, a CLI via an npm package for local runs, a GitHub Action that can fail builds based on score thresholds, an MCP server for AI coding assistants, and a programmatic API for custom integrations. Pro tier compliance reports are provided in formats that support audit evidence collection for frameworks such as PCI‑DSS 4.0 and SOC 2 Type II.

Intruder has a long history in web application scanning and supports a large ecosystem of plugins and integrations. Pricing for Intruder is typically usage‑based, which can become expensive at scale. middleBrick’s tiered pricing is designed for API‑centric programs, with clear caps on scans and API counts. Teams with a small number of APIs and a need for developer‑friendly tooling may prefer middleBrick, whereas large programs with diverse vulnerability management needs might continue to use Intruder for its breadth.