DDoS Protection for APIs and SaaS

Why APIs are harder to protect

Protecting API services is trickier than protecting traditional websites, because the threat is not only malicious attack but also abuse by legitimate users:

• CAPTCHAs cannot be applied — API clients are programs, not browsers, so human-verification challenges do not translate directly.
• One tenant can take down everyone — a single customer's buggy script can exhaust the platform's entire quota.
• Attacks look like normal traffic — high-frequency API calls are the business's normal mode of operation.
• Webhooks are a weak point — callback endpoints often lack authentication, making them a natural entry point.

Typical API platform risks

Risk	Symptom	Defense
Endpoint flooding	A single endpoint hit at high frequency	Per-endpoint rate baselines
Quota abuse	Valid keys used far beyond intent	Per-key / per-tenant quota control
Scraping	Automated tools bulk-extracting data	Behavioral fingerprinting + sequence analysis
Webhook flooding	Spoofed callbacks hitting internal endpoints	Source validation + signature verification

How AwayDDoS protects APIs

1. Tiered throttling: global → tenant → endpoint

We establish three levels of rate control: global to keep the platform from being overwhelmed, tenant-level to stop one customer from taking down everyone, and endpoint-level to protect expensive routes precisely. A trigger at any layer does not affect normal traffic at the others.

2. Multi-tenant isolation and fair scheduling

When one tenant's traffic turns anomalous, policies apply only to that tenant — everyone else is unaffected. This is critical for SaaS platforms: one customer's problem must not become everyone's outage.

3. Machine-learned behavior baselines

We model normal call patterns per endpoint (QPS, parameter distribution, source distribution, temporal signature) and auto-degrade when traffic deviates — queueing, serving cache, or requiring re-authentication. See CC Attack vs DDoS.

4. Webhook and callback protection

Callback endpoints require mandatory source validation and signature verification, with rate limiting on anomalous call patterns — preventing attackers from penetrating internal systems through spoofed callbacks.

Why API teams choose us

• No reliance on CAPTCHAs — policies designed for programmatic clients that do not break API automation.
• Endpoint-level precision — not blunt global rate limiting, but targeted protection for the routes that matter.
• Long-lived connections and WebSocket support — covering modern API patterns.
• Fixed pricing, never blackholed — API downtime cascades to every customer, so blackholing is simply unacceptable.

Recommended deployment

API businesses typically combine DNS steering (effective in minutes) with GRE / BGP tunnels to protect internal service communication. If your APIs run in your own racks, tunnels cover all ports and protocols at once. See the deployment comparison.