api security audit agent

    1

    Professional API security auditor for identifying BOLA, tenant isolation failures, and OWASP Top 10 risks.

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    api security audit agent

    Example session with this skill installed

    Audit this OpenAPI spec for a multi-tenant fintech app. Pay close attention to the /transfers and /accounts endpoints. We use JWT for auth. [OpenAPI YAML attached]

    • Read your context and instructions
    • Compiled the api security audit
    • Generated the document

    I have completed the security audit of the fintech API specification. The review focused on tenant isolation and authorization flows for financial transactions.

    API Security Audit Report: Fintech Core

    Executive Summary

    The API design has strong authentication foundations but suffers from significant authorization gaps at the object level (BOLA) and lacks sufficient abuse controls for high-frequency transfers.

    Findings Summary

    IDSeverityStatusRisk ClassAttack SurfaceRemediation
    SEC-001CriticalConfirmedAPI1:2023 BOLA/accounts/{id}Enforce server-side ownership check
    SEC-002HighDesign WeaknessAPI4:2023 Resource Consumption/transfersImplement per-tenant rate limiting
    SEC-003MediumEvidence GapAPI2:2023 Broken AuthJWT ValidationVerify RS256 signature enforcement

    Detailed Finding: SEC-001 - Broken Object Level Authorization

    • Status: Confirmed Weakness
    • Affected Operations: GET /accounts/{id}, PATCH /accounts/{id}

    Threat Scenario: An authenticated user can access or modify any account details by incrementing the integer {id} in the URL path. The spec does not indicate a check that the account_id belongs to the tenant_id extracted from the JWT.

    Evidence: The account_id is a simple integer path parameter with no corresponding middleware check defined in the operation summary.

    Remediation: Implement a repository-level filter that includes tenant_id in every SQL query: SELECT * FROM accounts WHERE id = ? AND tenant_id = ?.

    Next steps

    1. Implement the suggested SQL filter for all account-related queries.
    2. Provide the JWT validation middleware source code to resolve the SEC-003 evidence gap.
    3. Define a global rate-limiting policy to mitigate SEC-002.

    api-security-audit-agent.pdf

    PDF · document

    Generated

    Example file from a real run - the skill writes it into your workspace.

    Connects securely to your tools. The creator never sees your data.

    What you get

    Audit OpenAPI or GraphQL specs for OWASP Top 10 vulnerabilities.Verify multi-tenant isolation in API middleware and policy logic.Detect sensitive data exposure in response schemas and error messages.Review webhook signing and SSRF protections in event-driven systems.

    About this skill

    The problem

    Vague security advice doesn't fix bugs. General-purpose LLMs often miss deep authorization flaws, tenant isolation gaps, or broken object-level access in complex API designs.

    What it does

    • Identifies OWASP API Top 10 risks including BOLA, BFLA, and mass assignment.
    • Maps trust boundaries across public, internal, and service-to-service interfaces.
    • Evaluates tenant isolation strategies in database queries and background jobs.
    • Generates a control coverage matrix for authentication, validation, and abuse controls.
    • Produces evidence-based findings that separate confirmed weaknesses from missing documentation.

    Why this beats prompting it yourself

    This skill implements a structured audit methodology that forces evaluation of per-object authorization, not just endpoint access. It prevents the common AI mistake of assuming a framework is secure by default or that TLS solves application-level auth issues.

    Use cases

    • Reviewing OpenAPI/Swagger specs for data exposure before a release.
    • Auditing multi-tenant logic in middleware and policy definitions.
    • Hardening webhook implementations against SSRF and replay attacks.
    • Performing a security gap analysis on legacy internal API documentation.

    Known limitations

    Cannot guarantee runtime security without access to production environment variables or traffic logs. Does not perform destructive testing or live exploitation.

    How to install

    Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.

    ~30 seconds
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    Trust & safety

    Security scanned

    Verified clean 19 days ago

    • Passed all security checks, Safe to install

    Listed19 days ago

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