94% of web breaches start at the API layer. The market for professionals who can stop those breaches is valued at $58 billion. Two certifications claim to validate that expertise: CASP (Certified API Security Professional) from Practical DevSecOps, and ASCP (API Security Certified Professional) from APIsec University.
This blog gives you a direct, data-backed comparison.
What is the Certified API Security Professional (CASP) course?
The Certified API Security Professional is a hands-on API security certification designed for security professionals who need to attack APIs, defend them, and build systems that prevent breaches at scale. It covers the full API security lifecycle, from threat modeling and authentication to CI/CD pipeline security and OWASP API Top 10 defense patterns.
Certified API Security Professional
Secure REST, GraphQL & SOAP APIs: OWASP Top 10 + hands-on testing.
CASP at a glance:
| Factor | CASP (Practical DevSecOps) |
| Exam format | 6-hour task-based exam + 24-hour written report |
| Labs | 40+ browser-based guided exercises |
| Lab Access | 60 days |
| Video access | 3 years |
| CPE credits | 36 |
| Instructor support | 24/7 Mattermost |
| Credential validity | Lifetime |
| Focus | Offense + Defense + DevSecOps pipeline security |
The curriculum covers OAuth, JWT, OIDC, RBAC, ABAC, injection attacks, SSRF, rate limiting, security headers, and DevSecOps toolchain integration. You learn how to break APIs and how to build ones that can’t be broken.
What Is ASCP?
ASCP is a practical penetration testing certification. Candidates must compromise two live API applications and find at least 6 of 8 embedded vulnerabilities within a 12-hour window.
ASCP at a glance:
| Factor | ASCP (APIsec University) |
| Exam format | 12-hour flag-capture penetration test |
| Structured course | None required. Self-study only. |
| Lab access | Exam environment only |
| CPE credits | Not specified |
| Instructor support | Community Discord |
| Credential validity | Not specified |
| Focus | API penetration testing only |
| Price | $450 (one free retake) |
ASCP tests one thing: can you find API vulnerabilities under time pressure? It does not test whether you can fix them, prevent them, or integrate security into a development pipeline.
Head-to-Head Comparison of CASP vs. ASCP
| Criteria | CASP | ASCP |
| Scope | Full-stack: offense + defense + DevSecOps | Pentesting only |
| Structured training included | Yes. 40+ labs, expert-led video course | No |
| CI/CD pipeline security | Yes | No |
| Written report submission | Yes | No |
| Enterprise employer recognition | Roche, IBM, Accenture, PWC, Booz Allen | Community / bug bounty circles |
| CPE credits | 36 | Not specified |
| Lifetime credential | Yes | Not confirmed |
| 24/7 support | Yes | No |
Why Experienced Security Professionals Choose Certified API Security Professional (CASP)
Security engineers at enterprise organizations don’t just need to find API vulnerabilities. They need to architect secure APIs, defend CI/CD pipelines, write findings reports, and lead security strategy across product teams. CASP was built for that profile.
Practical DevSecOps is a cybersecurity training and certifications company specializing in hands-on DevSecOps, AI security, and application security. Practical DevSecOps has trained over 12,500+ security professionals and is trusted by organizations including Roche, Accenture, IBM, PWC, and Booz Allen Hamilton.
That enterprise trust is verifiable. When a hiring manager at one of those organizations sees CASP on a resume, they recognize the credential from their team.
ASCP has no equivalent enterprise footprint. Its audience is primarily pentesters and bug bounty hunters. Strong credentials for that niche. Wrong credentials if you’re targeting senior AppSec or DevSecOps roles.
The Salary Case for CASP
CASP holders report a 15–20% salary increase within 12 months of certification. Companies currently pay up to $190,000 for API security specialists. The $58B API security market is actively hiring, and the talent pool isn’t close to keeping up.
ASCP has no documented salary impact data. Its value proposition is skill validation for pentesters, not career advancement for security engineers.
Conclusion
Choose CASP if you are:
- A security engineer targeting senior AppSec or DevSecOps roles
- Working in environments where APIs run inside CI/CD pipelines
- Targeting enterprise organizations that recognize trusted credentials
- A professional who needs CPE credits and structured learning
Certified API Security Professional
Secure REST, GraphQL & SOAP APIs: OWASP Top 10 + hands-on testing.
Choose ASCP if you are:
- A dedicated pentester focused purely on API attack techniques
- A bug bounty hunter wanting practical validation
- Supplementing a broader security certification stack
If your goal is career advancement and salary growth, CASP is the direct path. If your goal is sharpening offensive pentesting skills as a specialist, ASCP covers that lane.
FAQs
CASP (Practical DevSecOps) covers the full API security lifecycle: offense, defense, authentication, CI/CD security, and threat modeling. It includes a structured course with 40+ labs and 24/7 support. ASCP (APIsec University) is a 12-hour penetration testing exam with no required course. ASCP tests attack skills only. CASP tests both attack and defense.
Yes. CASP holders report a 15–20% salary increase within 12 months. API security specialists earn up to $190,000 at organizations like Roche, IBM, and Accenture. ASCP has no comparable salary impact data publicly available.
They test different things. CASP requires a 6-hour practical task exam plus a 24-hour written report. ASCP requires finding 6 of 8 flags in a 12-hour pentest window. CASP is more demanding in scope because it tests both offensive and defensive competencies, plus formal reporting.
AppSec engineers, DevSecOps practitioners, security architects, and anyone securing APIs inside CI/CD environments. It’s specifically valued at enterprise organizations that have vetted it through real-world deployment.
Yes. With 94% of web breaches starting at the API layer and a $58B market hiring, API security expertise commands serious compensation. CASP is a lifetime credential with 36 CPE credits, enterprise recognition, and a documented salary impact. It returns its investment fast.
