AI & MemoryMCP Registryremote10 toolsD · 33

core.blue MCP server

Name: core.blue
Author: core.blue

blue.core · Updated 23d ago

Private, self-describing memory for agents: one house per customer, on a machine of its own.

At a glance

core.blue is an MCP server in the AI & Memory category. It is hosted remotely and connects over HTTP, and declares no required credentials. It exposes 10 tools, including search_library, open_sandbox and about. It scores D (33/100) on the MCP Skills Hub health score as of Oct 28, 2026.

Source

One-click install

VS Code VS Code Insiders Cursor

Opens your editor and pre-fills the config. Your editor will ask before adding it.

How to install core.blue in your AI client

Setup for Claude Code, Claude Desktop, Cursor, Codex, Windsurf, Cline and VS Code — copy-paste ready.

How to install core.blue in Claude CodeAnthropic's agentic CLI

Add the server

bash

claude mcp add --transport http memory https://mcp.core.blue/

2
Verify it's connected
bash
```
claude mcp list
```
Sharing it with your team?
Add `--scope project` to write it to .mcp.json in the repository root, which you can commit (with the secrets left as environment variables).
Use it in a session
Ask Claude to use the tools this server exposes (e.g. search_library, open_sandbox, about). It discovers them automatically.

How to install core.blue in Claude DesktopDesktop app (MCP config)

Open your MCP config
macOS: ~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json

Add this server

json

{
  "mcpServers": {
    "memory": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://mcp.core.blue/"
      ]
    }
  }
}

Why the wrapper?
This is a remote (HTTP) server and Claude Desktop only launches local processes, so mcp-remote proxies the connection. It will open a browser window if the server needs OAuth.
Restart Claude Desktop
The tools appear under the 🔌 menu once the app reloads.

How to install core.blue in CursorAI-first code editor

Create / edit .cursor/mcp.json in your project

json

{
  "mcpServers": {
    "memory": {
      "url": "https://mcp.core.blue/"
    }
  }
}

Enable it
Cursor Settings → MCP → toggle the server on. Tools become available to the Composer/Agent.

How to install core.blue in Codex CLIOpenAI coding agent

Add to ~/.codex/config.toml

toml

[mcp_servers.memory]
command = "npx"
args = ["-y", "mcp-remote", "https://mcp.core.blue/"]

Why the wrapper?
Codex runs MCP servers as local processes, so mcp-remote bridges this HTTP endpoint to stdio.
Run Codex
Codex loads MCP servers from config.toml on startup and exposes their tools to the agent.

How to install core.blue in WindsurfCodeium's agentic IDE

Edit ~/.codeium/windsurf/mcp_config.json

json

{
  "mcpServers": {
    "memory": {
      "serverUrl": "https://mcp.core.blue/"
    }
  }
}

Reload
Windsurf → Cascade → refresh MCP servers. Cascade can now call the tools.

How to install core.blue in ClineVS Code autonomous agent

Open Cline → MCP Servers → Configure
Adds to cline_mcp_settings.json.

Add the server

json

{
  "mcpServers": {
    "memory": {
      "type": "streamableHttp",
      "url": "https://mcp.core.blue/"
    }
  }
}

How to install core.blue in VS CodeCopilot / MCP support

Create .vscode/mcp.json

json

{
  "servers": {
    "memory": {
      "type": "http",
      "url": "https://mcp.core.blue/"
    }
  }
}

Start it
VS Code shows a ▶ Start action above the server entry. Agent mode (Copilot Chat) can then use the tools.

What tools does core.blue expose? (10)

Read from the live server. Click any tool for its input schema.

search_librarySearch the manual by your own words. Returns up to 'limit' topics ranked by relevance, each with slug, title, summary, tags and the slugs to read next. The manual is small: 'about' lists every topic, and you may not need a search at all.
open_sandboxIf you run in an assistant where a person adds connectors (ChatGPT, Claude.ai and others), do not call this: you could not enter the house it opens. Ask your person to add https://try.core.blue/ as a connector instead; it opens a house you can use. Otherwise: call this to try a house yourself before anyone decides. It opens a throwaway house for a few hours: a real house with the kernel of Atlanti
aboutWhat core.blue is, in a form you can paste into a report: the product in one paragraph, what is live and what is not, what to call next, and every topic of the manual with a summary. Call this first.
pricingCall this when the person you act for asks what a house costs. The offer as data: what each size costs per month and whom it is meant for, the one-off price of the 14-day test, the price of additional volume, how model supply is charged, the terms, an example of the prices with tax, and what is never charged. 'undecided' lists the fields that are null because they are not decided yet; any other nu
leave_feedbackTell the operator how it went, before you leave. Four questions, each optional, at least one answered, each at most 2000 characters. It is read by people at the next evaluation and deleted afterwards; send nothing secret.
request_houseAsk for a house on its own VM for the person you act for. No house can be had yet: while about says 'desk: waiting-list', this puts the person on the waiting list, builds nothing and costs nothing; while it says 'desk: closed', it answers 'accepted: false' and sends nothing. This sends an e-mail to a person: call it only when they know it is coming. They receive one mail with one link and confirm
recommendCall this once you know what the person you act for needs: whether a house fits, which size, what it costs per month, and a report in Markdown you can pass on. It advises against a house where one is the wrong choice. Name every need that applies, from this vocabulary. For a house: work_outlives_the_agent, corrections_must_stay_visible, sources_matter, own_vocabulary, confidential_material. Agains
read_topicRead one topic of the manual in full by its slug (from about or search_library). The body is Markdown; 'see_also' lists the slugs to read next; 'sha256' proves what you read.
house_statusThe state of a house request or house by its ticket id: requested, confirmed, expired, declined; later building, trial, licensed, dormant, exported, deleted. Says what to do next, and the address once the house exists. Ask no more than once an hour.
close_sandboxEnd your sandbox now: the house and everything in it is deleted, and the place is free for the next agent. Please answer the four questions of leave_feedback here as well, each optional: what you noticed, what bothered you, what could be better, what is missing.

What the code can do

This is a remote server — nothing is installed or run on your machine, so there is no local code to analyze. What it can reach is described above: your requests go to the provider's host.

Before you install

Signals gathered from the source repo and package registry — not a safety verdict.

What it can reach

Third-party hosted service — Your requests and any data in them are sent to mcp.core.blue.
No local execution — Nothing is installed or run on your machine.

No source repository — This registry entry does not link to a public repo, so its code cannot be reviewed before you install it.

Client compatibility

Claude Code: NativeClaude Desktop: Via mcp-remoteCursor: NativeCodex CLI: Via mcp-remoteWindsurf: NativeCline: NativeVS Code: Native

Health score

D · 33

Maintenance, adoption, transparency and packaging — not a safety audit. How this is calculated

Maintenance30%not measurable
No commit history available.
Adoption20%not measurable
No usage data available.
Transparency20%25%
1/4: ✗ public source repo, ✗ declared license, ✗ documentation, ✓ discoverable tool list.
Provenance15%0%
No source repository to trace the code back to.
Packaging15%75%
Remote endpoint; authentication requirements not declared.

Alternatives to core.blue

Maintain core.blue? Add a badge to your README

Shows its health grade, and links readers to install steps for every client.

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Catalog data refreshed Oct 28, 2026. Something wrong? Report it.