Best alternative to Prompt Security

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What middleBrick covers

  • Black-box API scanning with risk score and prioritized findings
  • Read-only methods only, no agents or SDK integration required
  • Detection aligned to OWASP API Top 10 (2023), SOC 2, and PCI-DSS
  • OpenAPI 3.x and Swagger 2.0 parsing with $ref resolution
  • Authenticated scans with Bearer, API key, Basic auth, and cookies
  • Continuous monitoring with scheduled rescans and webhook alerts

Scope and approach compared to prompt security tools

Best alternative to Prompt Security for API risk is a black-box API security scanner that submits read-only requests to an endpoint and returns a risk score with prioritized findings. Unlike prompt-based security analysis that relies on natural language instructions, this approach tests the live API surface directly, detecting implementation-level issues rather than speculative prompt injection paths.

Detection coverage aligned to standards

The scanner maps findings to OWASP API Top 10 (2023), supports audit evidence for SOC 2 Type II, and aligns with requirements of PCI-DSS 4.0. Coverage spans authentication bypass, JWT misconfigurations, Broken Object Level Authorization, Broken Function Level Authorization, sensitive data exposure, input validation issues, rate limiting weaknesses, SSRF indicators, and inventory management gaps. It also includes 18 LLM/AI security probe categories such as system prompt extraction, instruction override, and token smuggling.

Operational characteristics and constraints

Scans complete in under a minute using read-only methods (GET and HEAD) plus text-only POST for LLM probes. OpenAPI 3.0, 3.1, and Swagger 2.0 specs are parsed with recursive $ref resolution, and findings are cross-referenced against the specification to identify undefined security schemes or deprecated operations. Destructive payloads are never sent; private IPs, localhost, and cloud metadata endpoints are blocked at multiple layers. The tool does not fix, patch, or remediate findings, and it does not perform active SQL injection or command injection testing.

Authentication, authorization, and safe scanning

Authenticated scanning supports Bearer tokens, API keys, Basic auth, and cookies, gated by domain verification via DNS TXT record or an HTTP well-known file to ensure only domain owners can scan with credentials. The scanner forwards a limited header allowlist: Authorization, X-API-Key, Cookie, and X-Custom-* headers. Continuous monitoring options include scheduled rescans, diff detection across scans, email alerts rate-limited to one per hour per API, and HMAC-SHA256 signed webhooks with auto-disable after five consecutive failures.

Product offerings and integration options

The Web Dashboard provides scan management, report viewing, score trend tracking, and downloadable branded compliance PDFs. The CLI npm package supports commands such as middlebrick scan <url> with JSON or text output. A GitHub Action can gate CI/CD, failing the build when the score drops below a set threshold. An MCP server enables scanning from AI coding assistants, and a programmatic API client supports custom integrations.

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Frequently Asked Questions

Does this replace a human pentester for high-stakes audits?
No. The scanner detects and reports with remediation guidance but does not replace a human pentester for high-stakes audits.
What authentication methods are supported for authenticated scans?
Bearer tokens, API keys, Basic auth, and cookies. Domain verification is required before credentials are accepted.
Can the scanner detect business logic vulnerabilities?
No. Business logic vulnerabilities require domain context and human analysis; the scanner does not detect them.
How long is scan data retained after cancellation?
Customer scan data is deletable on demand and purged within 30 days of cancellation. It is never sold or used for model training.
Does the scanner test for SQL injection or command injection?
No. Active SQL injection or command injection testing is outside scope due to the need for intrusive payloads.

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