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**To update an API mapping**
The following ``update-api-mapping`` example changes an API mapping for a custom domain name. As a result, the base URL using the custom domain name for the specified API and stage becomes ``https://api.example.com/dev``. ::
aws apigatewayv2 update-api-mapping \
--api-id a1b2c3d4 \
--stage dev \
--domain-name api.example.com \
--api-mapping-id 0qzs2sy7bh \
--api-mapping-key dev
Output::
{
"ApiId": "a1b2c3d4",
"ApiMappingId": "0qzs2sy7bh",
"ApiMappingKey": "dev"
"Stage": "dev"
}
For more information, see `Setting up a regional custom domain name in API Gateway <https://docs.aws.amazon.com/apigateway/latest/developerguide/apigateway-regional-api-custom-domain-create.html>`__ in the *Amazon API Gateway Developer Guide*.