JustOnce

ai.justoncePublished by justonce.aiOfficial publisherv1.0.0Updated Oct 24, 2026

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

VerifiedStreamable HTTPWeb executableKnowledge & Memory

Overview

AI-generated overview

JustOnce is a remote, OAuth-secured persistent memory service that gives AI assistants one shared vault across every MCP client.

What you can do
  • Store and recall persistent memory for the assistant across sessions.
  • Share one memory vault between all MCP clients connected to the account.
  • Access the vault through an OAuth-secured remote endpoint.
  • No tool list is published, so the exact read and write operations are not documented here.
When to use it
Useful when you want an assistant to remember context between conversations and keep that memory consistent across several MCP clients or devices, rather than starting fresh each session.
Requirements
A remote MCP endpoint at mcp.justonce.ai over streamable HTTP. OAuth authentication is required, so a JustOnce account is needed. No environment variables or headers are declared.
Before you install
Everything stored in the vault is held by a third-party service and shared across every connected client, so anything written there is visible to all of them. OAuth grants access to your account; review the scopes requested. The published tool list is empty, so confirm what the server can read or change before relying on it.

Installation

In SourceWeft

  1. Open JustOnce in the dashboard and add it to a workspace.
  2. Connect the required credentials. They are stored privately and never shown on public pages.
  3. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/ai.justonce%2Fmemory/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config. The client completes OAuth sign-in on first connect.

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

Tools

0
This server asks you to sign in, so SourceWeft could not read its tools without an account and has not indexed them. What a connected account sees can depend on that account and its permissions.

Version history

1
  1. v1.0.0LatestSep 16, 2026

Score

67% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.