MCP server

Arca Official

build.arca.mcp/arca-mcp-server

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

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

Needs an API keyVerified publisher: arca.build

https://mcp.arca.build

At a glance

Type: MCP server
Publisher: arca.build (verified by the MCP Registry)
Status: Needs an API key
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 arca-mcp-server https://mcp.arca.build

Claude Desktop

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

Codex (config.toml)

[mcp_servers.arca-mcp-server]
url = "https://mcp.arca.build"

Gemini CLI

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

Cursor

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

VS Code

{"servers":{"arca-mcp-server":{"type":"http","url":"https://mcp.arca.build"}}}

Antigravity

agy mcp add arca-mcp-server https://mcp.arca.build

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":"arca-mcp-server","server_url":"https://mcp.arca.build","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"arca-mcp-server","server_url":"https://mcp.arca.build"}

Needs an API key or token from its maker, usually added as a header in the setup.

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