Scan OpenAPI and Swagger files with a static API security scanner that finds authentication, authorization, and error-handling gaps before code reaches production. Aligned to OWASP API Security Top 10 and RFC 7807 with 29+ analysis rules for REST and GraphQL APIs.
Comprehensive SAST analysis with security, syntax, documentation, RFC compliance, versioning, and performance checks
Detect OWASP API Security Top 10 vulnerabilities including injection, broken authentication, and data exposure
Validate error responses follow RFC 7807 Problem Details for HTTP APIs with proper structure
Modern apps run on APIs. Banks, retailers, IoT devices and smart‑city systems all expose data and functionality via APIs. Because APIs reveal application logic and often handle sensitive personal data, they have become a prime target for attackers. Without secure APIs, innovation is impossible. Following security best practices and checking your API design early reduces the risk of breaches and protects your users.
There are several ways to test an API. Comprehensive security combines multiple approaches: static testing of API specifications (SAST for APIs), dynamic testing of running endpoints (DAST) and fuzzing to uncover unexpected weaknesses. Static testing examines your OpenAPI file without executing the API. It helps you identify design flaws early – for example, missing authentication requirements or insecure endpoints – and improve your documentation quality. Dynamic and fuzz tests complement static analysis by checking live implementations; apisast.com specialises in static analysis.
Upload your OpenAPI specification for comprehensive security testing and vulnerability assessment
Professional Static Application Security Testing with 29+ analysis rules across 6 categories
Detect design issues linked to broken authentication, security misconfiguration, excessive data exposure and more. Comprehensive OWASP API Top 10 vulnerability detection.
Ensure your API requires appropriate authentication and restricts operations based on user roles. Validate security schemes and access controls.
Check that descriptions, response examples and contact details are complete and clear. Better documentation helps developers and prevents misuse.
Validate that your error responses follow the problem details format, making it easier for clients to handle errors consistently.
Detect missing version numbers, non‑semantic version strings and absent deprecation notices for better API lifecycle management.
Ensure pagination, compression and caching directives are present and sensible; highlight missing limits that could lead to denial‑of‑service risks.
Upload your OpenAPI specification (JSON or YAML, up to 10 MB) or enter a publicly accessible URL. Select a security profile – choose from a standard scan for everyday APIs or a comprehensive audit for critical services. Receive your report – analysis completes in seconds and provides a list of issues with remediation advice. Your file is processed securely.
This scanner analyses your specification only. It does not send requests to your API, execute code, or guarantee the absence of runtime vulnerabilities. For a complete security posture, combine static analysis with dynamic testing and fuzzing tools and review the OWASP API Security Top 10 guidelines.
It performs static analysis of OpenAPI/Swagger files to find design issues, missing authentication, improper error handling and other weaknesses in the specification. It does not send requests to your API or execute any code.
It identifies potential vulnerabilities related to API design and configuration. It cannot detect runtime bugs, business‑logic flaws or issues that only appear during execution. For comprehensive security, combine static analysis with dynamic testing and fuzzing.
JSON and YAML OpenAPI files (versions 2.0 and 3.x) up to 10 MB. You can upload a file or provide a URL.
Typically less than one minute, depending on the complexity of the API specification.
Yes. The specification is analysed in memory and not saved. No runtime data or API keys are required.
It's a list of the most common API security risks. Our security analysis checks your specification against many of these issues, such as broken authentication and security misconfigurations.
Each reported issue includes a description and recommended remediation steps. The tool's role is to guide you on improving your API design; consult your development team to implement fixes.
An Application Programming Interface exposes functionality and data for other software to consume. APIs enable modern web, mobile and IoT applications.
A standard format (formerly Swagger) used to describe RESTful APIs. It allows automatic generation of documentation and SDKs.
Examination of code or specifications without running them, used to identify design and coding flaws early.
Testing of running applications by sending requests to live endpoints to detect runtime vulnerabilities.
A community‑maintained list of the most critical API security risks, such as broken object level authorisation and broken authentication.
A specification that defines a consistent structure for returning error responses from HTTP APIs (problem details).
Static analysis catches design flaws before they ship. By scanning the OpenAPI contract instead of live endpoints, you can block broken authentication, missing authorization scopes, weak error handling, and leaky metadata at pull-request time. That means fewer production hotfixes, faster audits, and fewer surprises during pen tests.
Upload a JSON or YAML specification, choose a ruleset, and receive a prioritized report in seconds. The scanner evaluates authentication schemes, OAuth scopes, response shapes, pagination, rate limiting headers, and RFC 7807 compliance. It then translates findings into developer-friendly guidance with links to remediation snippets.
1) Upload or fetch
Drag your spec or point to a repo/URL. Versioning tags are detected automatically.
2) Run SAST rules
29+ static checks cover auth, errors, data exposure, pagination, and documentation quality.
3) Ship safely
Share the report, export to CI, and track fixes. Integrations keep the baseline consistent.
Want the full workflow? Learn more about our API security scanner or read how our SAST tools work for APIs.
Each rule maps to OWASP categories so security teams can show traceability. APISAST inspects security schemes, token propagation, rate limiting headers, error contracts, and data exposure to flag issues such as Broken Object Level Authorization (BOLA) and Unsafe Consumption of APIs.
We specifically check for:
You get:
Upload your specification above or bookmark this page to trigger scans directly from CI/CD. Need guidance on rollout? See our guide to SAST testing for APIs or jump to the scanner overview.
When you are ready to benchmark alternatives, compare static and dynamic approaches in the API security scanner comparison or deep-dive into API security SAST tools. For Swagger-specific guidance, head to the OpenAPI security scanner.