Cheapest GitHub Action for API security

Integrating API security checks into CI/CD can be done with free and paid GitHub Actions. Options range from open source scanners that run black-box tests to commercial SaaS integrations that provide risk scoring and trend tracking. Evaluate tools by scan coverage, pricing model, and how easily they fail or gate merges in your workflows.

Open source tools are often zero-cost but require more setup and maintenance. Many rely on community rulesets and may only cover a subset of the OWASP API Top 10.

• Schemathesis — contract testing against your OpenAPI schema with property-based fuzzing. Supports OpenAPI 3.0, 3.1, and Swagger 2.0.
• Dredd — hook-driven validation against API documentation; useful for ensuring basic contract compliance.
• OWASP ZAP in API mode — active and passive scanning; requires careful configuration to avoid noisy runs in CI.

These tools typically do not provide risk grades, continuous monitoring, or detailed remediation guidance within the GitHub UI.

Several commercial platforms offer a free tier that can be sufficient for small teams or initial adoption. The free limits usually cap scans per month or the number of APIs covered.

• middleBrick — free tier provides 3 scans per month, CLI access, and basic dashboarding. Uses black-box scanning with read-only methods and maps findings to OWASP API Top 10, PCI-DSS 4.0, and SOC 2 Type II.
• Other vendors may offer 50 to 100 scans per month in a free plan, with restrictions on authenticated scanning and reporting depth. Verify whether authentication support and CI/CD integration are included in the free tier.

Free tiers are a practical way to validate workflow integration before committing to paid plans.

For teams needing more API coverage and automation, paid tiers reduce per-scan costs and add CI/CD gating. Compare monthly price, included APIs, and monitoring capabilities.

• middleBrick Starter ($99/month) — covers 15 APIs, monthly scans, dashboard, email alerts, MCP Server, and webhook delivery. Adds authenticated scanning with Bearer, API key, Basic auth, and cookies protected by a domain verification gate.
• middleBrick Pro ($499/month for 100 APIs) — continuous monitoring, diff detection, GitHub Action gates that can fail builds, Slack/Teams alerts, compliance reports aligned to PCI-DSS 4.0 and SOC 2 Type II, and signed webhooks.
• Enterprise tiers ($2,000/month+) provide unlimited APIs, custom rules, SSO, audit logs, SLAs, and dedicated support. Prioritize tools that let you define thresholds for build failures and enforce them consistently across repositories.

When evaluating pricing, model the cost against the number of public and internal APIs you intend to scan continuously.

Use GitHub Actions to gate merges when security scores degrade. Configure the action to fail the build if the risk score drops below a chosen grade or if new high-severity findings appear. Limit which headers are forwarded to the scanner to reduce noise and prevent credential leakage.

uses: middlebrick/action@v1
with:
  url: ${{ secrets.TARGET_URL }}
  threshold: C
  headers: |
    Authorization: ${{ secrets.API_TOKEN }}
    X-API-Key: ${{ secrets.API_KEY }}

Protect credential inputs with repository secrets, and restrict action permissions to the minimum required. Combine API scanning with dependency and secret scanning for layered coverage. Remember that scanners detect issues but do not apply fixes; use the output to triage and assign remediation work.