API Security &
Authentication

We map your endpoints, data sensitivity, and trust boundaries, then review current auth against the OWASP API Security Top 10. This produces a prioritized list of real risks rather than a generic checklist.

We pick the right model — OAuth 2.0 for third-party access, JWTs for stateless sessions, API keys for machine-to-machine — and decide between a managed IdP like Auth0 and a self-hosted server. The choice balances control, cost, and how much auth you want to own.

We implement login, token issuance, refresh, and revocation with secure defaults: short token lifetimes, asymmetric signing, and protection against replay. Tokens carry only what they need, so a leaked one exposes as little as possible.

We enforce authorization on every endpoint, including object-level checks that stop one user from reading another's records. Roles, scopes, or attributes are evaluated server-side, never trusted from the client.

We add structured audit logs for sensitive actions and alerts for anomalies like credential stuffing or token abuse. Secrets move into a vault, and headers, CORS, and TLS settings are hardened to close common gaps.

We run automated and manual security tests — fuzzing tokens, attempting privilege escalation, probing for IDOR — before launch. Your developers get clear docs on flows, scopes, and error handling so the security model is actually used correctly.