Heirmos for ChatGPT

com.heirmos/memory

Persistent memory shared across Claude, ChatGPT, Grok and other MCP clients.

client:ChatGPT transport:streamable-http

Install Heirmos in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://mcp.heirmos.com/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs