Making Meridian Link's claim that its open-banking APIs are protected by rate limiting provable: limits keyed on IP address only, a credential-stuffing wave of 40 million login requests in a day, a partner retry loop that took the dedicated interface down for 47 minutes, and 47 shadow routes across 1,200 endpoints; the eight-layer throttle stack of duties, inventory, limit design, enforcement, fairness, detection, verification and evidence, with request traffic thinning as it passes each layer; and the rate limiting defensibility file with 429 responses carrying Retry-After, staging tests that prove each limit fires, degrades and recovers, a parity test for third-party providers and a regulator reply built on dated artefacts.

CY-EXPERT-059Expert Level · API Security

API Rate Limiting Defensibility — The Throttle Stack

An expert-level course that turns 'our APIs are protected by rate limiting' into something a regulator, a customer or a third-party provider can check. Work the throttle stack - eight layers a rate limit passes from a default setting to evidence: Duties, Abuse Cases & Risk Mapping; Endpoint Inventory & Cost Classes; Limit Design: Algorithms, Keys & Budgets; Gateway, Service & Data-Layer Enforcement; Client Identity, Quotas & Fairness; Abuse Detection, Bot Management & Response; Verification Testing & Evidence; and Metrics, Customer Commitments & Regulator Dialogue - across one continuous open-banking case, building a single capstone rate limiting defensibility file one component per chapter.

18 hours8 chapters32 lessons225 activities8 labs

What you'll learn

Map every rate limit to the regulatory, security and contractual duties and the OWASP abuse cases it controls, and inventory every routed endpoint with an owner, a sensitivity and a measured cost class.
Design limits with the right algorithm and key, derive budgets from measured backend capacity and cost per request with the arithmetic shown, and enforce them at gateway, mesh, service and data layers with shared counters, correct 429 semantics and signed fail modes.
Register client identities that cannot be cheaply multiplied, publish fair quota tiers with measurable criteria, prove parity with the own channel pair by pair, and detect the automated abuse that stays below every configured limit.
Verify on authorised own staging that each limit fires, degrades and recovers, file every run as reconstructable evidence behind a regression gate, and answer regulators and customers with measured figures, dated citations and a disclosed roadmap.

Price:৳12,000