How to get an API from textract custom adapter to connect to Flutter

Hi,

As per my understanding, you are trying to create a mobile app which can upload documents for analysis. These would be the steps:

1. Creating adapters, I assume you already done this.
2. Test the inference.
3. Create a Lambda function which can trigger this inference, refer this for some examples of how you can use AWS SDK
4. Since you are looking for an API key to execute this Lambda funcrtion, you can add a trigger from API Gateway to Lambda, refer this.. You can chose the authentication style which suits you - from an API key to Cognito etc.

Thanks, Rama

Try to use this doc to create an extractor in Python.

https://docs.aws.amazon.com/textract/latest/dg/lambda.html

Here is on adapters:https://docs.aws.amazon.com/textract/latest/dg/textract-adapters-tutorial.html