An API that resists the obvious attacks.
Authentication and rate limiting, input validation and output sanitization, abuse detection, and monitoring for the patterns no honest caller produces. The boundary work that decides whether a leaked key or a probing script becomes an incident — or a non-event.
Your API is your real attack surface — not your UI.
The front end is the part you design for people. The API is the part attackers design for. They skip the buttons, ignore your client-side checks, and talk to the endpoints directly with a script — at machine speed, with no assumptions about how the app is “supposed” to be used. Everything you trusted the UI to enforce has to live on the server: who the caller is, what they're allowed to do, how much, and whether the input is anything like what you asked for. We build that boundary properly — auth and rate limits, validation and sanitization, abuse detection and monitoring — so the obvious attacks bounce off it.
The API has become the thing worth protecting.
Each prompt has the same answer — controls at the endpoint, not trust in the client.
- 01
Your product is the API
Controls built for direct callers, not assumed from a browser that isn't there.
- 02
You've seen abuse attempts
Rate limits, lockouts, and anomaly rules that turn a probe into a non-event.
- 03
A pen test is on the calendar
The obvious doors closed first, so the testers find the subtle things.
- 04
Partners and third parties call you
Scoped keys, per-partner quotas, and logging that shows exactly who did what.
- 05
A leaked key keeps you up at night
Rotation, revocation, and quotas so one credential can't drain the whole system.
The boundary that holds without a browser.
Enforced at the endpoint, where the caller actually is.
Auth & rate limits
Every endpoint knows the caller, their scope, and their budget.
Validation framework
Schemas, size limits, and sanitization at the boundary.
Abuse detection
Anomaly rules, bot defense, and lockouts on real patterns.
Monitoring
Signals, alerts, and logging that catch trouble as it happens.
Five layers a request has to get through.
- 1Authenticate
- 2Rate limit
- 3Validate
- 4Detect abuse
- 5Monitor
No single check stops everything, so a request has to pass all of them. A call that gets past auth still meets a rate limit; what gets past the limit still has to be valid; what looks valid still gets watched for abuse — and whatever slips through, monitoring sees while it's happening.
Know who's calling, and how much they can.
Every endpoint should be able to answer two questions: who is this, and what are they allowed to do — including how much. We design auth so identity and scope are checked at the endpoint, not inferred from a token that was valid earlier, then layer rate limits and quotas per key and per route. So a leaked credential or a runaway integration meets a ceiling instead of an open tap.
- Identity and scope checked at every endpoint
- Per-key and per-route rate limits
- Quotas that cap a leaked or greedy caller
- Key rotation and revocation built in
Accept exactly what you documented.
Past the boundary, nothing is trusted until it's checked. We build a validation framework around schemas — types, ranges, lengths, required fields — that rejects the unexpected rather than coercing it, with size limits so one request can't exhaust memory and output sanitization so dirty data doesn't come back out as an injection. The API ends up with a narrow, well-defined contract and no quiet side doors.
- Schema validation on every request
- Reject the unexpected, don't coerce it
- Size limits against resource exhaustion
- Output sanitization to stop injections
Spot the traffic no honest caller produces.
Abuse usually looks different from real use if you watch the right signals: a key suddenly enumerating IDs, a burst of failed logins across many accounts, replays of a request that should only work once. We build anomaly rules and bot defenses around the behaviours that matter for your API, add replay protection and lockouts, and wire it into monitoring so you catch it live — not in the post-incident write-up.
- Anomaly rules tuned to your real traffic
- Bot defense and credential-stuffing lockouts
- Replay protection for once-only requests
- Alerts and logging to catch it as it happens
From open endpoint to defended boundary.
Map the surface
We inventory your endpoints, callers, and data, and find where direct access actually puts you at risk.
Lock the access
Auth, scopes, rate limits, and quotas designed so every call is identified and budgeted.
Build the validation
A schema-based validation framework with size limits and output sanitization at the boundary.
Add abuse detection
Anomaly rules, bot defense, replay protection, and lockouts wired into monitoring and alerts.
Prep and watch
Pen-test preparation, plus logging and dashboards so the API stays observable as it grows.
The API stopped being something you could leave open.
Your API is the product
Customers and integrations talk to your endpoints directly, so the API — not the UI — is what has to be hardened.
You've had abuse attempts
Scraping, credential stuffing, or a probing script has already shown up, and you'd rather not wait for the next one to land.
A pen test is coming
You want the obvious findings fixed before the testers arrive, so their time goes on the issues that are actually hard to find.
Practical controls, used with judgement.
The things teams ask first.
Harden the API before it's probed.
Tell us what your API exposes and what's prompting the focus — abuse you've seen, a pen test on the calendar, or partners about to plug in. We'll map the surface and put auth, validation, abuse detection, and monitoring in place that keep the obvious attacks from ever landing.