Arca

by mcp.arca.build · build.arca.mcp/arca-mcp-server

Arca is a private data vault where your AI stores your structured data, semantic memory and skills.

Online, needs sign-inRemote
Website
Category
Knowledge and memory
Connection
Remote (HTTP)
Tools
Shown after sign-in
Status
Online, needs sign-in

Connect it to your AI

Claude Code

claude mcp add --transport http arca-mcp-server https://mcp.arca.build/

Claude, ChatGPT, Cursor and other apps

Add it as a custom connector with this URL (Streamable HTTP):

https://mcp.arca.build/

This server expects extra headers, usually an API key from its maker.

Cursor, VS Code and other apps (mcp.json)

{
  "mcpServers": {
    "arca-mcp-server": {
      "url": "https://mcp.arca.build/"
    }
  }
}

Questions

What is the Arca MCP server?

Arca is a private data vault where your AI stores your structured data, semantic memory and skills. It is made by mcp.arca.build and listed in the official MCP Registry as build.arca.mcp/arca-mcp-server. MCP (Model Context Protocol) is the open standard that lets AI apps like Claude, ChatGPT and Cursor use outside tools.

How do I add Arca to Claude?

In the Claude app or claude.ai, open Settings, then Connectors, choose "Add custom connector" and paste https://mcp.arca.build/. In Claude Code, run: claude mcp add --transport http arca-mcp-server https://mcp.arca.build/

How do I add Arca to ChatGPT?

ChatGPT can use remote MCP servers as connectors. In ChatGPT settings, under Apps and Connectors, turn on developer mode if asked, create a new connector and paste https://mcp.arca.build/.

How do I add Arca to Cursor?

Open Cursor settings, go to MCP, choose "Add new MCP server" (or edit ~/.cursor/mcp.json) and add: { "mcpServers": { "arca-mcp-server": { "url": "https://mcp.arca.build/" } } }

Does Arca work right now?

It is online and asks you to sign in before it lists its tools, which is normal for servers tied to an account.

Is this your server? Get the badge for your README
chen.media/mcp badge

Markdown (GitHub README)

[![Listed on chen.media/mcp](https://chen.media/mcp/badge/build-arca-mcp-arca-mcp-server.svg)](https://chen.media/mcp/build-arca-mcp-arca-mcp-server)

HTML (switches to dark mode on its own)

<a href="https://chen.media/mcp/build-arca-mcp-arca-mcp-server"><picture><source media="(prefers-color-scheme: dark)" srcset="https://chen.media/mcp/badge/build-arca-mcp-arca-mcp-server.svg?theme=dark"><img src="https://chen.media/mcp/badge/build-arca-mcp-arca-mcp-server.svg" alt="Listed on chen.media/mcp" height="40"></picture></a>

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