# The IP Similarity API stops working

Calls to GET /v3/similarity/ips/* on GreyNoise API stopped working on January 1, 2026.

- API: GreyNoise API (api.greynoise.io)
- Kind: Endpoint removal
- Announced: July 28, 2025
- Takes effect: January 1, 2026
- Calls after that day: fail
- Calls it hits: `GET /v3/similarity/ips/*`
- Source: [Announcement](https://docs.greynoise.io/docs/v2-v3-api-migration-matrix)
- Page: https://www.okapi.bot/providers/greynoise-api/breaking-changes/the-ip-similarity-api-stops-working/

## What to use instead

GreyNoise names no replacement for IP Similarity: dropping the feature is a product decision.

## GreyNoise API's words

> All endpoints with a new replacment endpoint indicated or noted as being Deprecated will be End of Life (no longer available) as of 1-Jan-2026.