Crystal MCP Server: Install & Setup

Install Crystal in Claude Code

Claude Code

claude mcp add --transport http crystal https://crystal-api-118881845105.us-east5.run.app/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "crystal": {
      "url": "https://crystal-api-118881845105.us-east5.run.app/mcp"
    }
  }
}

Frequently asked questions

What does the Crystal MCP server do?

Self-curating memory your AI tools share: provenance, verified citations, and trust tiers.

Is the Crystal MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Crystal run locally or remotely?

Remote. Hosted by the provider. You connect with a URL, nothing to install.

How do I add Crystal to Claude Code?

Run: claude mcp add --transport http crystal https://crystal-api-118881845105.us-east5.run.app/mcp

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