owenlittlejohns / globalentrychecker

A serverless project to regularly check the soonest appointment time for Global Entry using AWS SAM.

Global Entry Checker

A serverless project to regularly check the soonest appointment time for Global Entry using AWS SAM.

Prequisites:

• Docker Desktop
• Python (preferably managed via pyenv or conda).
• The AWS SAM client

Set up a Python environment:

You can use either conda or pyenv to set up a Python environment that will allow SAM to find the requisite version of Python for the lambda runtime (3.9).

Conda:

conda create --name global-entry python=3.9 --channel conda-forge --channel defaults

Deployment

sam build
sam deploy --guided

The SAM template has a number of parameters. These include:

• The project name
• A comma separated list of Global Entry location IDs to query.
• An email address to which the SNS topic will send notifications.

After running sam deploy --guided for the first time, the values entered will be saved in sam-app/samconfig.toml. These values will ensure future invocations find these values.

Note - the SNS subscription confirmation email may be identified as span by an email client.

Determining location IDs for specific locations:

• Navigate to the Global Entry appointment schedule page.
• Determine a location that you want to get updates about.
• Open the Chrome developer tools (or equivalent) and open the Network tab.
• Click on your location of interest.
• Find the new request to the schedulerapi/slots endpoint. The payload of this request will include a locationId.

TODO:

• Tests