API authentication hardening

API authentication hardening is a review and reinforcement of how your API checks WHO is calling and WHAT they are allowed: the authentication mechanism (keys/tokens/OAuth), token lifetimes and rotation, access scopes (so a token can do only what is needed), permission checks on EVERY request (not just at entry), protection against brute-forcing (rate limiting, lockouts), secure storage and transmission of secrets (not in the URL, not in logs). Honestly about the scope, this matters: we reduce the risk of unauthorized API access and close found weaknesses — but do NOT promise the API becomes 'unbreakable': security depends on correct implementation across the whole code, and new errors/vulnerabilities can appear. Honestly about the check boundary: this is hardening of authentication/authorization, not a full API pentest or an audit of all business logic (if a deep check is needed, that is a separate large work). Honestly about combinations: for web sessions, cookie protection (758) and CSRF (751/759) are adjacent, for transport — HTTPS (736); strong authentication does not replace them. Honestly about the effect: lower risk, we do NOT guarantee sales growth by itself. Honestly about access: access to the API code and endpoint description is needed. An important boundary: this is API authentication/authorization, while protection against injections in endpoints (753) and general code security are separate. Picture this: instead of 'a leaked key can hit any endpoint without limits' — a token with limited rights, a lifetime and a check on every request. The base price starts from 18,000 ₽; it depends on the number of endpoints and the authentication mechanism.

• A leaked key/token can reach any endpoint without limits.
• Permissions are checked at entry, but not on every request — access bypass.
• Tokens without a lifetime and rotation, no access scopes.
• No brute-force protection; secrets exposed in the URL/logs.

• A review of the authentication mechanism (keys/tokens/OAuth)
• Setting up token lifetimes and rotation
• Introducing access scopes on a least-privilege basis
• Checking permissions on every request (not only at entry)
• Protection against brute-forcing (rate limiting/lockouts)
• Secure storage and transmission of secrets (not in URL/logs)
• Indicating boundaries (not a pentest, depends on implementation)
• Handover and review with you

• Access to the API only with a correct permission check
• Tokens with limited rights and a lifetime
• Harder brute-forcing and abuse of a leaked key
• Reduction of access risk (full security — separate)

• We study the endpoints and current authentication; collect access
• We reinforce tokens/scopes/permission checks/rate limiting, secure secrets
• We check access scenarios, review boundaries with you

• After hardening, will the API definitely not be hacked?

  That cannot be promised. We reduce the risk of unauthorized access and close found authentication/authorization weaknesses, but security depends on correct implementation across the whole code, and new vulnerabilities can appear. This is risk reduction, not a guarantee of 'unbreakability'.

• Is this a full API audit/pentest?

  No. This is hardening of authentication and authorization (who calls and what they are allowed). A full API pentest and an audit of all business logic is a separate, larger and more expensive work. We will honestly say whether hardening is enough for you or you need a deep check.

• Why scopes and a check on every request?

  Scopes limit a token to only the needed rights — a leaked key does less harm. Checking permissions on every request (not just at login) closes access bypass when someone hits an endpoint directly. This is the least-privilege principle — the basis of API security.