AWS Lambda

Last updated: May 15, 2026

Use AWS Lambda when you want Aissist to access internal systems through a controlled API layer.

This works well when you do not want to expose your database or backend systems directly.

With Lambda, you can:

• control exactly what data Aissist can read

• filter or transform the returned data

• expose only the fields and actions you want

How the pattern works

1. Build a small Lambda function for the data or action you want to expose.

2. Publish it through a Function URL or API Gateway.

3. Connect that endpoint through the RESTful API integration.

4. Create actions that call the endpoint.

Example flow

Step 1: write the Lambda function

Create a small function that returns only the data Aissist needs.

This example fetches booking details by booking ID:

import mysql.connector

def lambda_handler(event, context):
    secrets = dict()
    with open("secrets.json") as input_fp:
        secrets = json.load(input_fp)
    
    database = mysql.connector.connect(
        host=secrets["host"],
        database=secrets["database"],
        user=secrets["user"],
        password=secrets["password"]
    )

    query = """ SELECT * FROM cr_booking WHERE id = %s """
    cursor = database.cursor()
    cursor.execute(query, (json.loads(event['body'])["booking_id"],))
    
    column_names = [col[0] for col in cursor.description]
    bookings = [dict(zip(column_names, row)) for row in cursor.fetchall()]
    
    return {"book_details": bookings}

Step 2: package the function

Package the function, dependencies, and any required configuration into a zip file.

1. Install the MySQL connector package:

   pip3 install --target ./packages mysql-connector

2. Create the deployment package:

   cd ./packages
   zip -r ../deployment_package.zip .
   cd ..
   zip deployment_package.zip lambda_function.py
   zip deployment_package.zip secrets.json

Step 3: create the Lambda function in AWS

1. Go to the AWS Lambda Console.

2. Create a new Lambda function.

3. Enable a Function URL for a simple setup, or use API Gateway for stricter control.

4. Upload your deployment_package.zip.

5. Copy the public endpoint URL.

Step 4: connect Lambda to Aissist

Add the endpoint through the RESTful API integration.

Then create actions that call that endpoint.

Use the Lambda Function URL or API Gateway URL as the API endpoint.

Why use AWS Lambda

AWS Lambda is useful because it is:

• Secure — expose only the data and operations you allow

• Scalable — no server management required

• Cost-efficient — pay only when it runs

• Flexible — shape the response for Aissist before it returns

Best practice

Keep each Lambda endpoint focused on one job.

Return only the fields Aissist needs, then test the action in Action Debugger.