# GET /v0/servers/{}/versions changes: takes the server name instead of the server ID

Calls to GET /v0/servers/{}/versions on Modelcontextprotocol stopped working on September 29, 2025.

- API: Modelcontextprotocol (registry.modelcontextprotocol.io)
- Kind: Behaviour change
- Takes effect: September 29, 2025
- Calls after that day: fail
- Calls it hits: `GET /v0/servers/{}/versions`
- Source: [Announcement](https://raw.githubusercontent.com/modelcontextprotocol/registry/main/docs/reference/api/CHANGELOG.md)
- Page: https://www.okapi.bot/providers/modelcontextprotocol/breaking-changes/get-v0-servers-versions-changes-takes-the-server-name-instead-of-the-server-id/

## What to use instead

Pass the URL-encoded server name instead of the server ID.