With Amazon API Gateway, you only pay when your APIs are in use. There are no minimum fees or upfront commitments. For HTTP APIs and REST APIs, you pay only for the API calls you receive and the amount of data transferred out. There are no data transfer out charges for Private APIs. However, AWS PrivateLink charges apply when using Private APIs in API Gateway. API Gateway also provides optional data caching charged at an hourly rate that varies based on the cache size you select. For WebSocket APIs, you only pay when your APIs are in use based on number of messages sent and received and connection minutes.
The API Gateway free tier includes one million HTTP API calls, one million REST API calls, one million messages, and 750,000 connection minutes per month for up to 12 months.
HTTP API: A RESTful API that is optimized for serverless workloads. Pay only for the API calls you receive.
REST API: A RESTful API that offers API proxy functionality and management features in a single solution. Pay only for the API calls you receive.
WebSocket API: Maintains a persistent connection between connected clients to enable real-time message communication. Pay for messages transferred and connection minutes.
Free Tier
The Amazon API Gateway free tier includes one million API calls received for REST APIs, one million API calls received for HTTP APIs, and one million messages and 750,000 connection minutes for WebSocket APIs per month for up to 12 months. If you exceed this number of calls per month, you will be charged the API Gateway usage rates.
1M REST API CALLS RECEIVED | 1M HTTP API CALLS RECEIVED | 1M MESSAGES | 750,000 CONNECTION MINUTES
per month
These free tier offers are only available to new AWS customers, and are available for 12 months following your AWS sign-up date. When your 12 month free usage term expires or if your application use exceeds the tiers, you simply pay standard, pay-as-you-go service rates.
HTTP APIs
Pay only for the API calls you receive and the amount of data transferred out. For HTTP APIs, the API Gateway free tier includes one million API calls per month for up to 12 months.
REST APIs
Pay only for the API calls you receive and the amount of data transferred out. There are no data transfer out charges for Private APIs. However, AWS PrivateLink charges apply when using Private APIs in API Gateway. API Gateway also provides optional data caching charged at an hourly rate that varies based on the cache size you select. For REST APIs, the API Gateway free tier includes one million API calls per month for up to 12 months.
WebSocket APIs
Pay only for messages sent and received and the total number of connection minutes. You may send and receive messages up to 128 kilobytes (KB) in size. Messages are metered in 32 KB increments. So, a 33 KB message is metered as two messages.
For WebSocket APIs, the API Gateway free tier includes one million messages (sent or received) and 750,000 connection minutes for up to 12 months.
Additional Charges
You may incur additional charges if you use API Gateway in conjunction with other AWS services or transfer data out of AWS. For details on AWS service pricing, see the pricing section of the relevant AWS service detail pages. Links to pricing for some of the commonly used services are listed below.
If you use external data transfers, you will be charged at the EC2 data transfer rate
Includes pricing for each hour that your VPC endpoint is provisioned in each Availability Zone
Includes pricing for requests and duration
Includes pricing for metrics and dashboards
Pricing Examples
HTTP APIs
Pricing Example 1: An API is used in a Serverless Web Application that invokes Lambda to return dynamic webpage content. The site gets 10,000 page loads per minute. Each API request is 12KB and the response is 46 KB.
10,000 page loads/minute * 60 minutes/hour * 24 hours/day * 30 days/month / 1,000,000 = 432 million requests per month.
300 million * $1.00/million = $300
132 million * $0.90/million = $118.8
Total = $418.8 ($0.97 per million)
Pricing Example 2: An API is used for uploading data into your HTTPS backend. The API is called 25 times per minute to upload documents. Each document is, on average, 4.5 MB in size.
25 call/minute * 60 minutes/hour * 24 hours/day * 30 days/month * 4.5 MB/512 KB/request = 9,720,000 requests per month * $1/million = $9.72
Total = $9.72
REST APIs
Edge Optimized and Regional APIs
An Edge Optimized or Regional API receives five million API calls per month, with each API call returning responses of 3 kilobytes (KB) in size with no caching.
Example below reflects pricing for US East (N. Virginia, Ohio), US West (Oregon), Asia Pacific (Mumbai)
Amazon API Gateway API call charges = 5 million * $3.50/million = $17.50
Total size of data transfers = 3 KB * 5 million = 15 million/KB = 14.3 GB
Amazon API Gateway data transfer charges = 14.3 GB * $0.09 = $1.29
Total Amazon API Gateway charges = $17.50 + $1.29 = $18.79
Edge Optimized and Regional APIs
An Edge Optimized or Regional API receives 15 billion API calls per month, with each API call returning responses of 4 kilobytes (KB) in size with no caching.
Example below reflects pricing for US East (N. Virginia, Ohio), US West (Oregon), Asia Pacific (Mumbai)
Amazon API Gateway API call charges = 333 million * $3.50/million = $1,165.50
667 million * $2.80/million = $1,867.60
14 billion * $2.38/million = $33,320.00
Total Amazon API call charges = $1,165.50 + $1,867.60 + $33,320.00 = $36,353.10
Total size of data transfers = 4 KB * 15 billion = 57,220.46 GB
Amazon API Gateway data transfer charges = 57,220.46 GB * $0.09 = $5,149.84
Total Amazon API Gateway charges = $36,353.10 + $5,149.84 = $41,502.94
Private APIs
A Private API receives five million API calls, with each API call having a request size of 0.3 kilobytes (KB) and returning responses of 3 kilobytes (KB). A VPC endpoint is provisioned in 1 Availability Zone (AZ) for the whole month (720 hours).
Example below reflects pricing for US East, US West (Oregon)
Amazon API Gateway API call charges = 5 million * $3.50/million = $17.50
Total Amazon API Gateway charges = $17.50
Total size of data transfers (Request + Response) = (3 KB + 0.3 KB) * 5 million = 16.5 million/KB = 15.7 GB
VPC Endpoint charges = 720 hours * $0.01/AZ/hr = $7.20
VPC Endpoint data processing charges = 15.7 GB * $0.01/GB = $0.16
Total Amazon VPC (AWS PrivateLink) charges = $7.20 + $0.16 = $7.36
Total charges = $17.50 + $7.36 = $24.86
Pricing Example with Caching Required (US East, US West, EU (Ireland))
If your API needs 1.5 GB of cache for its data, you can provision a 1.6 GB cache at $0.038/hr.
$0.038 * 24 = $0.912/day
WebSocket APIs
Chat Application: 1000 users are connected to the chat application for 12 hours in a day. Each user sends 100 messages and receives 500 messages per day. Each message size is 3KB.
Example below reflects pricing in US East (N. Virginia)
Messaging Cost
Total messages per month = (100 (sent msgs) + 500 (received msgs)) * 1000 (users) * 30 (days) = 18M
Total messaging cost = 18,000,000/1,000,000 * $1.00 (per million) = $18
Connectivity Cost
Total connection minutes per month = 1000 (users) * 12 (hrs) * 60 (mins) * 30 (days) = 21,600,000
Total connectivity cost = 21,600,000/1,000,000 * 0.25 (cost per million) = $5.40
Total Cost = $18 (Messaging cost) + $5.40 (Connectivity cost) = $23.40
Additional pricing resources
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