davidski / zestimate-lambda

λ🏠 AWS Lambda function for monitoring Zillow Zestimates

Zestimate Tracker (a/k/a update-zestimate)

Python based AWS Lambda function for checking the Zillow Zestimate of a given property value.

When triggered, this function pulls a CSV from a configured S3 location and the current Zillow Zestimate (including rental estimates) for a specified property. If the date of the last update to the Zestimate is newer than the last date in the file, a message is published to an SNS topic with the new value and the full Zestimate response is appended to the CSV.

Zestimates API documentation: https://bridgedataoutput.com/docs/explorer/zestimates#listZestimates

Expected Environment Variables

• zaddress - Address to track
• zwsid - Bridge Interactive API Server Token (for server-to-server communication)
• bucket_name - S3 bucket name to store Zestimate history
• bucket_key - S3 object name to store Zestimate history
• sns_topic_arn - SNS topic to publish to when new updates available

Deployment

Continuous Deployment is done via the GitHub Actions workflow. Alternatively, the included Makefile will build a ZIP file which can be deployed to AWS Lambda. This ZIP file will include all dependencies (including Pandas, and therefore rather large).

Contributing

This project is governed by a Code of Conduct. By participating in this project you agree to abide by these terms.

License

The MIT License applies.