# AWS HealthLake endpoints and quotas
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The following topics contain information about AWS HealthLake service endpoints and quotas.

**Topics**
+ [Service endpoints](#reference-healthlake-endpoints)
+ [Service quotas](#reference-healthlake-quotas)

## Service endpoints
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A service endpoint is a URL that identifies a host and port as the entry point for a web service. Every web service request contains an endpoint. Most AWS services provide endpoints for specific Regions to enable faster connectivity. The following table lists the service endpoints for AWS HealthLake.

[\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/healthlake/latest/devguide/reference-healthlake-endpoints-quotas.html)

## Service quotas
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Service quotas are defined as the maximum value for resources, actions, and items in your AWS account.

**Note**  
For adjustable quotas, you can request a quota increase using the [Service Quotas console](https://console.aws.amazon.com/servicequotas/). For more information, see [Requesting a quota increase](https://docs.aws.amazon.com/servicequotas/latest/userguide/request-quota-increase.html) in the *Service Quotas User Guide*.  
Sync Write API rate proportionally increases with payload size, with each 1KB increment consuming additional capacity (e.g., a 4KB payload uses 4x write capacity). Setting the optional `x-amz-fhir-history-consistency-level` header to `strong` doubles the write capacity consumption per resource.  
Resources within Bundles follow standard read/write limits based on 1 KB payload size. Bundle type *transaction* consumes twice the write capacity compared to type *batch*, meaning *batch* Bundles can process twice as many resources per second as transaction Bundles.

The following table lists the default quotas for AWS HealthLake.

[\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/healthlake/latest/devguide/reference-healthlake-endpoints-quotas.html)