API Security Testing for REST and GraphQL
API security testing checks whether your APIs let users read or change data they shouldn't. Scantra Security manually tests REST and GraphQL APIs for broken object-level authorisation, authentication flaws, mass assignment and business logic abuse, based on the OWASP API Security Top 10.
Last reviewed 2026-09-29 by the Scantra Security testing team
Talk to our Security Experts
Tell us what needs testing, then pick a 30-minute slot.
Get a tailored scope, timeline and pricing on the call.
Why APIs need dedicated testing
APIs expose your data and business logic directly. Issues like one tenant reading another tenant's records are hard for scanners to detect because they depend on who is making the request.
What our api security testing cover
- Web applications and websites
- REST and GraphQL APIs
- Android and iOS mobile apps
- AWS, Azure and GCP cloud environments
- External and internal networks
What we test in your API
- Object-level and function-level authorisation
- Authentication and token handling
- Mass assignment and input validation
- Rate limiting and resource abuse
- GraphQL introspection and query abuse
How an engagement works
1. Scoping call
A 30-minute call to understand your targets, user roles, environments and deadlines.
2. Written scope and quote
A clear scope, timeline and price based on what actually needs testing.
3. Manual testing
Automated discovery for breadth, then manual testing of logic, access control and authentication.
4. Report and retest
Findings with severity, evidence and remediation, then verification once fixes are in.
What you receive
- Executive summary for leadership, customers and auditors
- Technical findings with severity, evidence and affected assets
- Reproduction steps and developer-focused remediation
- Compliance mapping to ISO 27001, SOC 2, PCI DSS, RBI or SEBI where relevant
- Retest results showing open and resolved findings
Frequently asked questions
Can you test an API on its own?
Yes. Share documentation or a collection and test accounts for each role.
How much does it cost?
Pricing depends on scope: number of targets, user roles and depth of manual testing. Book a call and we will send a quote based on your real scope.
Do you work with teams outside India?
Yes. Testing is mostly remote, so we work with teams across India and internationally.