how can implement alexa api in my web site change speech to text can you help or share a link
Hi Avinash. Alexa Skills Kit does not provide skill developers with access to users' audio. As such, it's not possible to create a "calling" skill.
That said, your second question seems to be that what you really want is a service that you can use on your web-site to transcribe a user's voice input to text. Although this is not supported by Alexa, you might instead be interested in the AWS service, "Amazon Transcribe":
If you have any followup questions regarding Amazon Transcribe, please reach out to AWS either directly or by visiting the AWS Transcribe forums:
Using DynamoDB to store objects 1 Answer