API security testing

Protect the interfaces behind
your product.

REST and GraphQL testing for authorization, object access, token handling, schema abuse, and rate limits. We test the interfaces your product, partners and mobile clients actually run on.

BOLABFLAmass assignmentexcessive data exposureJWTrate limits

Your API is the real attack surface. It identifies BOLA, BFLA, mass assignment, excessive data exposure, JWT validation gaps, and the abuse paths automated checks miss, then proves each one against your endpoints. Every finding is exploited, ranked by impact, and written so an engineer can act on it the same day.

What we actually test

A scanner confirms an endpoint responds. It cannot tell you that one user can read another user's orders by changing an ID, that a hidden admin field is writable, or that a token still validates after the role behind it changed. That is the work.

  • Object level authorization: BOLA and IDOR across every resource an ID or reference can reach
  • Function level authorization: BFLA, role boundary abuse, and privileged actions exposed to lower roles
  • Mass assignment and excessive data exposure: writable fields you never meant to expose, and responses that leak more than the client shows
  • Token and session handling: JWT validation, algorithm and signature abuse, expiry, scope and replay
  • Schema and query abuse: GraphQL introspection, nested and batched queries, injection, and rate limit bypass

What you get

  • Validated role boundaries across users, tenants and partners, proven with real requests
  • Secure public and partner APIs, tested the way an external integrator or attacker would call them
  • Live findings the moment we confirm them, not a PDF weeks later
  • Remediation guidance your engineers can ship, not a generic reference link
  • Free retest and verified closure once the fix is deployed
  • An auditor ready report mapped to SOC 2, ISO 27001 and customer security reviews

How the engagement runs

You buy a pool of testing hours and spend them where the risk is, across this and your other surfaces. We scope the endpoints, exploit manually against real authorization boundaries, surface findings live, prioritize by impact, report for each audience, and retest until closure is proven. No blind box, no theatre.

Review my scope

Other surfaces we test