Rubric Protocol MCP Server

by 0xsimsio.github.0xsims/rubric-mcpv2.2.2

Attested evidence tools for AI agents: sanctions screening, agent/wallet records, paid via x402.

Node.jsstdioofficial registry

context tax

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security

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cold start

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freshness

Maintained2mo ago

Install Rubric Protocol MCP server

claude mcp add rubric-protocol -e RUBRIC_WALLET_KEY='<rubric-wallet-key>' -e RUBRIC_API_KEY='<rubric-api-key>' -- npx -y @rubric-protocol/mcp-server

{
  "mcpServers": {
    "rubric-protocol": {
      "command": "npx",
      "args": [
        "-y",
        "@rubric-protocol/mcp-server"
      ],
      "env": {
        "RUBRIC_WALLET_KEY": "<rubric-wallet-key>",
        "RUBRIC_API_KEY": "<rubric-api-key>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "rubric-protocol": {
      "command": "npx",
      "args": [
        "-y",
        "@rubric-protocol/mcp-server"
      ],
      "env": {
        "RUBRIC_WALLET_KEY": "<rubric-wallet-key>",
        "RUBRIC_API_KEY": "<rubric-api-key>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "rubric-protocol": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@rubric-protocol/mcp-server"
      ],
      "env": {
        "RUBRIC_WALLET_KEY": "<rubric-wallet-key>",
        "RUBRIC_API_KEY": "<rubric-api-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "rubric-protocol": {
      "command": "npx",
      "args": [
        "-y",
        "@rubric-protocol/mcp-server"
      ],
      "env": {
        "RUBRIC_WALLET_KEY": "<rubric-wallet-key>",
        "RUBRIC_API_KEY": "<rubric-api-key>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
RUBRIC_WALLET_KEY	—	yes	Optional. USDC-on-Base wallet private key enabling paid x402 tools; without it paid tools return setup guidance.
RUBRIC_X402_DAILY_LIMIT	—	—	Optional. Daily spend ceiling in USD for paid tools (default 1.00).
RUBRIC_API_KEY	—	yes	Optional. Rubric developer key for HCS-anchored attestation.
RUBRIC_MCP_MODULES	—	—	Optional. Comma-separated tool modules (default core,x402).

Freshness

Maintained — last maintenance signal 2mo ago. The newest of the signals below sets the band.

Last commit (default branch)
no data · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-07-28 · 2mo ago · official registry · v2.2.2

FAQ

›How do I install the Rubric Protocol MCP server in Claude Code?

Run: claude mcp add rubric-protocol -e RUBRIC_WALLET_KEY='<rubric-wallet-key>' -e RUBRIC_API_KEY='<rubric-api-key>' -- npx -y @rubric-protocol/mcp-server. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Rubric Protocol require an API key?

Yes. It expects RUBRIC_WALLET_KEY, RUBRIC_API_KEY, of which 2 are secrets.

›Can I use Rubric Protocol as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Rubric Protocol in the official MCP registry?

Yes, as io.github.0xsims/rubric-mcp.