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API Gateway

API Gateway is a software which sits in front of API (Application programming Interface) and helps to ensure great performance, high availability and elastic scalability of APIs. In simple words the API Gateway throttling takes all API requests from a client, determines which services are needed, and combines them into a unified, seamless experience for the user.

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What is an API Gateway?

All API requests made by clients are received by an API gateway, which uses request composition, request routing, and protocol translation to direct them to the proper microservice. In order to decide the optimal course of action, it often processes a request by calling numerous microservices and aggregating the responses. It can translate between internal protocols that are utilised and web-incompatible protocols.

An eCommerce website may make use of an API gateway to give mobile users access to an endpoint where they may request all of the product information at once. It calls up a variety of services, such reviews and product information, then merges the output.

Why use an API Gateway?

Enterprise APIs are typically deployed through API gateways. User authentication, API Management, rate limits, and statistics are common duties that API gateways take care of on behalf of a system of API services.

In addition to traffic management, CORS support, authorization, access control, API throttling, monitoring, and API management, API Gateway throttling handles all the tasks involved in accepting and processing hundreds of thousands of concurrent API calls.

An API management service essentially receives a remote request and responds to it. But when you host large-scale APIs, take into account your numerous issues.

You utilise a rate limiter and an authentication service to safeguard your APIs from misuse and abuse.

User Authentication & Rate Limiting

Traffic Analytics & API Routing

Analytics and monitoring tools are added to know how people are using your APIs. You should link to a billing system if your APIs are paid for. If you've chosen a microservices architecture, a single request can require calling hundreds of different services.

Your clients will still want to be able to access all of your services in one location even when you add new API services over time and retire others.

Incoming requests are intercepted by the API gateway throttling and sent to the API management system, which handles a variety of essential functions.

Some common functions of the API gateway include authentication, routing, API throttling, rate limiting, monitoring, analytics, policies, alerts, protocol transformation, aggregation, authorization brokering, and security.

Top 5 Benefits of API Gateway

Adaptive MFA Features

Efficient API management and development

Iterate, test, deploy new versions by running copies of the same API jointly with API Gateway throttling. No minimum fee or prior promises; only pay for API requests and data sent.

Performance at any scale

API Gateway gives API requests/responses with lowest latency. Authorize API calls to verify all backend activities can handle traffic peaks and backend services aren't used often.

Easy monitoring

You can visually track calls to your services by using the API Gateway dashboard to monitor performance metrics, data latency, and error rates for better API management.

RESTful API options

HTTP APIs are an ideal choice as they are 71% cheaper to create than REST APIs. REST APIs are needed for API proxy functionality and administration features in a single solution.

API Protocol Transformation and Brokering

When you need an API management gateway to modify incoming requests before sending them to backend services. The API gateway can modify responses returned from backend services.


API Gateway Logging & Monitoring

Logging and Monitoring

Logging and monitoring tools are added to know how people are using your APIs.

API Gateway Load Balancing

Load Balancing

Load balancing guarantees that no server is overwhelmed by distributing APIs among numerous servers.

API Gateway Rate Limiting

Rate Limiting

The interval between each request from each APIs & amount of requests received within a certain time zone.

API Gateway User Authentication

Authenticate & Authorize

Authentication and Authorization services are used to safeguard your APIs from misuse and abuse.

API Gateway Analytics


Analytics in API Gateway shows the insights about how your APIs are performing and being used.

API Gateway Data Aggregation

Data Aggregation

API Gateway collects raw data and expresses it in a summary form for statistical analysis.

API Gateway Protocol Transformation

Protocol Transformation

Modify API requests from clients before it reaches backend & change the response from integrations before API Gateway responds.

API Gateway Brokering

API Authorization Brokering

API Gateway has an intermediate registration and certification authority that can authenticate APIs.

API Gateway Caching


API Gateway responds from the cache instead of making a new request.

How does API Gateway throttling work?

The API Gateway architecture is depicted in this diagram. The miniOrange API Gateway's ability to accept and process up to hundreds of thousands of API calls simultaneously is depicted in this diagram. These duties include managing traffic, controlling access and authorisation, monitoring, and managing API versions.

For applications, API Gateway serves as the "front door”. There are numerous data exchange processes involved in application usage and testing. Such communication calls for in-depth planning. The API gateway functions as a central platform for accepting different API queries in order to resolve the problem.

Several API calls are combined, authenticated, and directed to the appropriate APIs during the process. It creates an appropriate gateway for requests made by particular microservices in the microservices ecosystem. Additionally, it establishes accessibility and conduct standards. Additionally, API gateways perform tasks including service discovery, API protocol translation, business logic processing, API throttling, cache management, network traffic support, and API monitoring.

API Gateway example:

Let’s take an example to understand the use case. Suppose there is a Banking System, In which there are various APIs involved. But the System takes too much time to load and process data. To overcome this issue, API gateway throttling will be used. The API Gateway will be placed in front of all APIs so that whenever a request is made, the software will respond by calling various microservices and combining the results to choose the fastest way possible. In this scenario, API management will help to boost and accelerate the delivery of the APIs and help to monitor the performance and information of the APIs.

 API Gateway Working