MCP server

Nexus Catalyst Official

com.nexus-catalyst/nexus-catalyst

Checked 26 Oct 2026, 08:29 UTC · It answered and asked for a sign-in

Cross-tool persistent memory and context for AI assistants over MCP.

Signs in with your accountVerified publisher: nexus-catalyst.com

https://mcp.nexus-catalyst.com

At a glance

Type: MCP server
Publisher: nexus-catalyst.com (verified by the MCP Registry)
Status: Signs in with your account
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 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 nexus-catalyst https://mcp.nexus-catalyst.com

Claude Desktop

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

Codex (config.toml)

[mcp_servers.nexus-catalyst]
url = "https://mcp.nexus-catalyst.com"

Gemini CLI

{"mcpServers":{"nexus-catalyst":{"httpUrl":"https://mcp.nexus-catalyst.com"}}}

Cursor

{"mcpServers":{"nexus-catalyst":{"url":"https://mcp.nexus-catalyst.com"}}}

VS Code

{"servers":{"nexus-catalyst":{"type":"http","url":"https://mcp.nexus-catalyst.com"}}}

Antigravity

agy mcp add nexus-catalyst https://mcp.nexus-catalyst.com

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":"nexus-catalyst","server_url":"https://mcp.nexus-catalyst.com","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"nexus-catalyst","server_url":"https://mcp.nexus-catalyst.com"}

Signs in with your account: your agent app opens a sign-in page the first time you use it.

CanaryGuard 402
Deterministic prompt-injection detection & sanitization for AI agents via x402 on Base.
ContextStream
Persistent memory and cross-session learning for AI coding assistants (hosted remote MCP).
STEM — Persistent AI Memory
Persistent memory and shared context across compatible AI assistants, with account-scoped OAuth.
Memoize — persistent agent memory
Persistent cross-session memory shared by Codex, Claude Code, ChatGPT, and other AI agents.
Kagura Memory Cloud
Persistent memory for AI assistants: store, search, and connect knowledge across conversations.
JustOnce
Persistent memory for AI assistants — one shared, OAuth-secured vault for every MCP client.
Brainbox
Persistent, portable memory for AI assistants — your private memory graph, from any MCP client.
Engram
Persistent, verbatim, searchable memory for AI assistants — one memory across every MCP client.

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