# Arca

> Use this tool when you need to securely store and manage sensitive data, semantic memory, and skills for your AI systems, providing a private data vault for organized information retrieval and utilization. It solves problems related to data privacy, organization, and accessibility, allowing for efficient skill and knowledge management. Ideal for applications requiring secure and structured data storage, Arca accepts structured data as input and provides organized information as output.

Canonical page: https://skillsregistry.net/skills/build-arca-mcp-arca-mcp-server  
JSON: https://api.skillsregistry.net/v1/skills/build-arca-mcp-arca-mcp-server

## Description

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

## Trust

- **Trust score (0–1):** 0.30
- **Verification tier:** unverified
- **Last scanned:** 2026-09-02

## Facts

- **Version:** 0.0.1
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** other
- **Updated:** 2026-09-02

## Source

- **Source listing:** [MCP Registry](https://registry.modelcontextprotocol.io/v0/servers/build.arca.mcp%2Farca-mcp-server)

## Use it

MCP endpoint published by the skill: `https://mcp.arca.build`

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "build-arca-mcp-arca-mcp-server"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/build-arca-mcp-arca-mcp-server` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/build-arca-mcp-arca-mcp-server/pull`

---
SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt