MCP server

JustOnce Official

ai.justonce/memory

Checked 25 Oct 2026, 20:29 UTC · It answered and asked for a sign-in

Persistent memory for AI assistants — one shared, OAuth-secured vault for every MCP client.

Needs a sign-in or keyVerified publisher: justonce.ai

https://mcp.justonce.ai

At a glance

Type: MCP server
Publisher: justonce.ai (verified by the MCP Registry)
Status: Needs a sign-in or key
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 25 Oct 2026, 20:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http memory https://mcp.justonce.ai

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.memory]
url = "https://mcp.justonce.ai"

Gemini CLI

{"mcpServers":{"memory":{"httpUrl":"https://mcp.justonce.ai"}}}

Cursor

{"mcpServers":{"memory":{"url":"https://mcp.justonce.ai"}}}

VS Code

{"servers":{"memory":{"type":"http","url":"https://mcp.justonce.ai"}}}

Antigravity

agy mcp add memory https://mcp.justonce.ai

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"memory","server_url":"https://mcp.justonce.ai","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"memory","server_url":"https://mcp.justonce.ai"}

Needs a sign-in or an API key from its maker.

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Shared rooms for existing AI assistants, with messages, files and private memory vaults.
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WhyVault
Shared Markdown memory that every AI assistant can read and write. Hosted in the EU.
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Portable AI memory shared across models and harnesses - plain markdown you own.
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Persistent cross-session memory shared by Codex, Claude Code, ChatGPT, and other AI agents.
Gnosis Memory
Persistent memory and vector search for AI agents. Hosted, OAuth-protected via Google sign-in.
Heirmos
Persistent memory shared across Claude, ChatGPT, Grok and other MCP clients.

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