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Crystal

io.github.EraHQ/crystal v1.0.0
Official Registry git

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

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Install connect over streamable-http

Run in your terminal 
claude mcp add crystal --transport http https://crystal-api-118881845105.us-east5.run.app/mcp
Add to ~/.cursor/mcp.json 
{
  "mcpServers": {
    "crystal": {
      "url": "https://crystal-api-118881845105.us-east5.run.app/mcp"
    }
  }
}
Add to Cursor →
Add to ~/.codeium/windsurf/mcp_config.json 
{
  "mcpServers": {
    "crystal": {
      "serverUrl": "https://crystal-api-118881845105.us-east5.run.app/mcp"
    }
  }
}
Add to .vscode/mcp.json 
{
  "servers": {
    "crystal": {
      "type": "http",
      "url": "https://crystal-api-118881845105.us-east5.run.app/mcp"
    }
  }
}
Add to VS Code →
Add to cline_mcp_settings.json 
{
  "mcpServers": {
    "crystal": {
      "url": "https://crystal-api-118881845105.us-east5.run.app/mcp"
    }
  }
}
Add to claude_desktop_config.json 
{
  "mcpServers": {
    "crystal": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://crystal-api-118881845105.us-east5.run.app/mcp"
      ]
    }
  }
}

Remote endpoints

TransportURLAuth headers
streamable-http https://crystal-api-118881845105.us-east5.run.app/mcp none

Agent reviews

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