Understanding AWS API Gateway Pricing

If you’re considering using Amazon Web Services (AWS) for your organization’s cloud infrastructure, you may be wondering about the pricing model for their API Gateway service. AWS is well-known for offering a wide range of services at competitive prices, and API Gateway is no exception. In this guide, we’ll dive into the details of AWS API Gateway pricing to help you better understand how much it might cost your organization to use this popular service.

Understanding AWS API Gateway Pricing

What is AWS API Gateway?

First, let’s review what exactly AWS API Gateway is and why it’s such an important component of many companies’ cloud infrastructure. In brief, AWS API Gateway provides a fully managed service for creating, publishing, maintaining, monitoring, and securing application programming interfaces (APIs). It makes it easy to create APIs that can access data or functionality from other AWS services like Lambda functions, DynamoDB tables or S3 buckets along with non-AWS services like on-premises web apps or third-party APIs.

Using API Gateway enables developers to design and develop scalable RESTful or WebSocket-based APIs quickly and easily without worrying about the underlying servers’ management. They can also monitor their APIs’ usage and generate custom metrics.

How Does AWS Price Its API Gateway Service?

Like most cloud-based services offered by Amazon Web Services, there are a few factors that contribute to the overall cost of using the AWS API Gateway service. These include:

Number of Requests Per Month:

The number of requests made to your APIs per month will have an impact on your overall cost because there is a charge per million requests made to your endpoints each month. If you have high-traffic public-facing APIs used by a large number of users across multiple applications or websites, then you will likely see higher costs associated with this metric.

It’s worth noting that if you’re using HTTP APIs (as opposed to REST APIs), then there are separate pricing tiers based on the amount of data transferred in and out of your APIs. HTTP APIs provide performance improvements over REST APIs, but come with their own pricing model.

Data Transfer Out:

Another factor that contributes to the overall cost of using AWS API Gateway is the amount of data transferred out from your APIs per month. You will be charged for the amount of data transferred out from your API endpoints to external clients (internet) at a tiered rate based on monthly usage volume.

WebSocket Time:

If you use WebSocket-based APIs with AWS API Gateway, you’ll also be charged for the amount of time that a WebSocket connection is established using Amazon’s servers. The pricing model for WebSocket time depends on how many hours are spent on making WebSocket connection requests per month.

Caching Capacity:

AWS API Gateway also provides caching functionality to reduce latency when retrieving data from backend services. If you choose to enable caching with API Gateway, you will be charged based on the size (in GB) of the cache memory and data transfer used by your cached responses each month.

Additional Features:

Finally, several additional features may impact how much it costs to use AWS API Gateway services. These include access logs, request/response transformations, usage plans and throttling features.

How Can You Estimate Your AWS API Gateway Costs?

To get an idea about how much it might cost your organization to use AWS’ API Gateway service, you can estimate your monthly bill using Amazon’s Simple Monthly Calculator. The calculator asks for some basic information about your expected usage patterns like number of requests, payload size etc., then estimates both upfront costs and ongoing monthly charges associated with these factors.

Keep in mind though that this estimation tool doesn’t capture all possible factors like number of users or applications using them or scaling architecture – so don’t rely solely on it without talking to experienced professionals who often use custom scripts or third-party tools for accurate cost estimates.

Additionally, because you only pay for what you use with AWS services, it’s generally a good idea to start small and adjust your usage as necessary based on actual traffic and usage patterns.


In summary, AWS API Gateway is a highly valuable service for creating, maintaining, monitoring and securing APIs. It offers competitive pricing structure based on various factors like number of requests, data transfer out or cache memory required. Although estimating costs can be challenging because of the many variables involved in pricing models, by following best practices around serverless architecture and keeping an eye on actual usage patterns over time will enable users to glean much value at lower prices from the service they choose to consume.


What is AWS API Gateway Pricing?

AWS API Gateway Pricing is a pricing model for the Amazon Web Services (AWS) platform that allows users to create, deploy, and manage APIs. This pricing model includes a variety of pricing options, including pay-per-request, data transfer out, caching, and tiered pricing based on usage.

How is Pay-per-Request Pricing Calculated?

Pay-per-Request pricing is calculated as $3.50 per million requests for the first one billion requests per month. This rate drops to $0.70 per million requests after the first billion requests each month.

What is Data Transfer Out Pricing?

Data Transfer Out pricing refers to the cost associated with transferring data from your API Gateway service out to the internet or other AWS regions. The first gigabyte of data transfer out is free each month, with additional data transfer costing between $0.05 and $0.09 per gigabyte depending on the AWS region you are using.

What is Caching in AWS API Gateway Pricing?

Caching in AWS API Gateway Pricing refers to the process of storing frequently requested data in memory so that it can be more quickly retrieved when needed. This can help reduce costs related to processing and bandwidth usage by keeping responses cached closer to users or applications that request them frequently.

How Does Tiered Pricing Work in AWS API Gateway Pricing?

Tiered pricing in AWS API Gateway Pricing operates under a graduated scale which charges progressively lower rates based upon higher levels of usage within a defined timeframe such as daily or monthly cycles.

How much does caching cost in AWS API Gateway?

The cost of caching in AWS API Gateway varies based on the cache size used, with prices ranging from $0.84/month for a 500 MB cache up to $336/month for a 200 GB cache.

What is the AWS free tier pricing of API Gateway?

The AWS free tier pricing for API Gateway includes up to 1 million API calls per month and 100 MB of data transfer out per month. Additional usage beyond these limits will result in charges according to the pay-per-request or data transfer out pricing model.

What are the benefits of using AWS API Gateway?

Using AWS API Gateway can provide numerous benefits, including simplified development and management of APIs, scalable performance, built-in security features, integration with other AWS services, and flexible pricing options that can help reduce costs over time.

How can I estimate my usage and costs with AWS API Gateway Pricing?

To estimate usage and costs with AWS API Gateway Pricing, you can use the Amazon Web Services Simple Monthly Calculator which allows you to enter expected usage metrics such as requests per month, data transferred out per month, caching size required, etc., to calculate estimated monthly cost.

What are some best practices for optimizing AWS API Gateway Pricing?

Some best practices for optimizing AWS API Gateway Pricing include setting up caching to reduce the number of requests made to back-end systems or databases, using compression to reduce bandwidth requirements, minimizing unnecessary headers or cookies sent in responses from your backend systems and setting request throttling limits appropriate for your intended application use cases.

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