# API Release - v3.9.0

> write_off_category field and filter, interior_color null filtering, NeoVIN reliability and caching improvements, an updated status page, and Stats API deprecation.



## New features

1. **Added field** **write_off_category****:**
2. Added write_off_category as a filter and response field in the API to enhance query capabilities.
3. **Interior Color Null Filtering**
4. Enabled filtering by null values for interior_color in the US Active Search API for improved data refinement.
5. Interior color - [Marketcheck API](https://apidocs.marketcheck.com/#66148123-97ae-4989-b161-386662adea8c)



## Optimizations

1. **NeoVIN Service Optimization -**
2. Optimized the NeoVIN API to reduce occurrences of 500 status codes, enhancing resilience and service reliability.
3. **Updated Status Page**
4. Updated [status.marketcheck.com](status.marketcheck.com) to cover new endpoints in the Marketcheck API, ensuring transparency and real-time status updates.
5. **Cache Improvements**
6. Optimized caching for searchable listings to reduce latency and improve query response times.



## Other changes

1. **Deprecations:**
2. **Stats API -** Marked Stats API as deprecated