ABS Core MCP Server

The ABS Core Model Context Protocol (MCP) server exposes governable tools to any MCP-compliant agent (Claude Desktop, Cursor, Windsurf, OpenClaw).

Unlike standard tool libraries, every tool exposed by the ABS MCP server is wrapped in a Policy Guard. This means execution is intercepted, logged, and evaluated against your governance rules before it touches sensitive systems.

Installation

Run the MCP server as a Docker container or Node.js process alongside your agent.

docker run -p 3000:3000 ghcr.io/abscore/mcp-server:latest

Available Tools

The following tools are available in the banking-edition preset:

`transfer_pix`

Executes a PIX transfer. Critical Risk.

Policy: financial-transfer-limit (e.g., Max R$ 5,000.00)
Schema:
- amount (number): Value in BRL.
- pixKey (string): Target PIX key.
- description (string): Transfer description.

{
  "name": "transfer_pix",
  "arguments": {
    "amount": 1500.00,
    "pixKey": "[email protected]",
    "description": "Payment for services"
  }
}

`query_customer`

Access sensitive customer data (CRM). High Risk.

Policy: lgpd-pii-access (Requires Justification)
Schema:
- cpf (string): Customer CPF (11 digits).

Returns redacted data if policy is violated or if user lacks permissions.

`query_balance`

Checks account balance. Low Risk.

Policy: data-access
Schema:
- accountId (string): Internal Account ID.

Integration

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "abs-core": {
      "command": "docker",
      "args": ["run", "-i", "--rm", "ghcr.io/abscore/mcp-server:latest"]
    }
  }
}

OpenClaw

Native integration via mcp-bridge.

const agent = new OpenClaw({
  mcp: ["http://localhost:3000/sse"]
});

MCP Integration