# Amazon Lex endpoints and quotas
<a name="lex"></a>

To connect programmatically to an AWS service, you use an endpoint. AWS services offer the following endpoint types in some or all of the AWS Regions that the service supports: IPv4 endpoints, dual-stack endpoints, and FIPS endpoints. Some services provide global endpoints. For more information, see [AWS service endpoints](rande.md).

Service quotas, also referred to as limits, are the maximum number of service resources or operations for your AWS account. For more information, see [AWS service quotas](aws_service_limits.md).

The following are the service endpoints and service quotas for this service.

## V2 service endpoints
<a name="lexv2_region"></a>

### Model building endpoints
<a name="lexv2_region_model_building"></a>


| Region Name | Region | Endpoint | Protocol | 
| --- | --- | --- | --- | 
| US East (N. Virginia) | us-east-1 |  models-v2-lex.us-east-1.amazonaws.com  | HTTPS | 
| US West (Oregon) | us-west-2 |  models-v2-lex.us-west-2.amazonaws.com  | HTTPS | 
| Africa (Cape Town) | af-south-1 |  models-v2-lex.af-south-1.amazonaws.com  | HTTPS | 
| Asia Pacific (Seoul) | ap-northeast-2 |  models-v2-lex.ap-northeast-2.amazonaws.com  | HTTPS | 
| Asia Pacific (Singapore) | ap-southeast-1 |  models-v2-lex.ap-southeast-1.amazonaws.com  | HTTPS | 
| Asia Pacific (Sydney) | ap-southeast-2 |  models-v2-lex.ap-southeast-2.amazonaws.com  | HTTPS | 
| Asia Pacific (Tokyo) | ap-northeast-1 |  models-v2-lex.ap-northeast-1.amazonaws.com  | HTTPS | 
| Canada (Central) | ca-central-1 |  models-v2-lex.ca-central-1.amazonaws.com  | HTTPS | 
| Europe (Frankfurt) | eu-central-1 |  models-v2-lex.eu-central-1.amazonaws.com  | HTTPS | 
| Europe (Ireland) | eu-west-1 |  models-v2-lex.eu-west-1.amazonaws.com  | HTTPS | 
| Europe (London) | eu-west-2 |  models-v2-lex.eu-west-2.amazonaws.com  | HTTPS | 
|  AWS GovCloud (US-West) | us-gov-west-1 |  models-v2-lex.us-gov-west-1.amazonaws.com  | HTTPS | 

### Runtime endpoints
<a name="lexv2_region_model_building"></a>


| Region Name | Region | Endpoint | Protocol | 
| --- | --- | --- | --- | 
| US East (N. Virginia) | us-east-1 |  runtime-v2-lex.us-east-1.amazonaws.com  | HTTPS | 
| US West (Oregon) | us-west-2 |  runtime-v2-lex.us-west-2.amazonaws.com  | HTTPS | 
| Africa (Cape Town) | af-south-1 |  runtime-v2-lex.af-south-1.amazonaws.com  | HTTPS | 
| Asia Pacific (Seoul) | ap-northeast-2 |  runtime-v2-lex.ap-northeast-2.amazonaws.com  | HTTPS | 
| Asia Pacific (Singapore) | ap-southeast-1 |  runtime-v2-lex.ap-southeast-1.amazonaws.com  | HTTPS | 
| Asia Pacific (Sydney) | ap-southeast-2 |  runtime-v2-lex.ap-southeast-2.amazonaws.com  | HTTPS | 
| Asia Pacific (Tokyo) | ap-northeast-1 |  runtime-v2-lex.ap-northeast-1.amazonaws.com  | HTTPS | 
| Canada (Central) | ca-central-1 |  runtime-v2-lex.ca-central-1.amazonaws.com  | HTTPS | 
| Europe (Frankfurt) | eu-central-1 |  runtime-v2-lex.eu-central-1.amazonaws.com  | HTTPS | 
| Europe (Ireland) | eu-west-1 |  runtime-v2-lex.eu-west-1.amazonaws.com  | HTTPS | 
| Europe (London) | eu-west-2 |  runtime-v2-lex.eu-west-2.amazonaws.com  | HTTPS | 
|  AWS GovCloud (US-West) | us-gov-west-1 |  runtime-v2-lex.us-gov-west-1.amazonaws.com  | HTTPS | 

## Service quotas
<a name="quotas-lex"></a>


| Name | Default | Adjustable | Description | 
| --- | --- | --- | --- | 
| Bot channel associations per bot alias (V2) | Each supported Region: 10 | No | The maximum number of bot channel associations that you can create per bot alias in this account in the current Region. | 
| Bots per account (V2) | Each supported Region: 100 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/lex/quotas/L-36FA8BD2)  | The maximum number of bots that you can create in this account in the current Region. | 
| Characters per custom slot type value (V2) | Each supported Region: 500 | No | The maximum number of characters that you can have per custom slot type value in this account in the current Region. | 
| Characters per sample utterance (V2) | Each supported Region: 500 | No | The maximum number of characters that you can have per intent or slot sample utterance in this account in the current Region. | 
| Custom slot type values and synonyms per bot locale (V2) | Each supported Region: 50,000 | No | The maximum number of custom slot type values and synonyms that you can have per locale per bot in this account in the current Region. | 
| Custom slot types per bot locale (V2) | Each supported Region: 100 | No | The maximum number of custom slot types that you can create per locale per bot in this account in the current Region. | 
| Sample utterances per intent (V2) | Each supported Region: 1,500 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/lex/quotas/L-ED50DA7C)  | The maximum number of sample utterances that you can create per intent in this account in the current Region. | 
| Sample utterances per slot (V2) | Each supported Region: 10 |  [Yes](https://console.aws.amazon.com/servicequotas/home/services/lex/quotas/L-77D6C60C)  | The maximum number of sample utterances that you can create per slot in this account in the current Region. | 
| Slots per bot locale (V2) | Each supported Region: 2,000 | No | The maximum number of slots that you can create per locale per bot in this account in the current Region. | 
| Slots per intent (V2) | Each supported Region: 100 | No | The maximum number of slots that you can create per intent in this account in the current Region. | 
| Total characters in sample utterances per bot locale (V2) | Each supported Region: 200,000 | No | The maximum number of characters that you can use per locale per bot for all intent and slot sample utterances in this account in the current Region. | 
| Values and synonyms per custom slot type (V2) | Each supported Region: 10,000 | No | The maximum number of values and synonyms that you can have per custom slot type in this account in the current Region. | 
| Versions per bot (V2) | Each supported Region: 100 | No | The maximum number of versions that you can create per bot in this account in the current Region. |