B2A MCP Server

Intelligence layer for AI agent capability discovery. When an agent hits its ceiling, B2A finds, matches, and orchestrates external services to break through.

Not a marketplace. Not a catalog. The brain that knows what you need when you don't.

What it does

• Discovers x402 services across 200+ ecosystem partners using keyword + Claude semantic matching
• Verifies AI outputs with adversarial auditing (score, grade, issues, gaps)
• Enhances outputs by combining verification with service discovery — tells you exactly which services can fix each gap
• Calls x402 services directly (with internal auth or x402 payment)

Tools

| Tool | Cost | Description | |------|------|-------------| | b2a_discover | Free | Find services matching a capability gap | | b2a_verify | ~$0.01 API | Adversarial verification with gap detection | | b2a_enhance | ~$0.02 API | Verify + discover services for each gap | | b2a_browse | Free | Browse the x402 ecosystem catalog | | b2a_call | Varies | Call any x402 service endpoint |

Setup

Claude Code

claude mcp add b2a -- node C:/Users/PC/b2a-mcp-server/dist/index.js

Or add to ~/.claude/settings.json:

{
  "mcpServers": {
    "b2a": {
      "command": "node",
      "args": ["C:/Users/PC/b2a-mcp-server/dist/index.js"],
      "env": {
        "ANTHROPIC_API_KEY": "your-key-here"
      }
    }
  }
}

Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "b2a": {
      "command": "node",
      "args": ["C:/Users/PC/b2a-mcp-server/dist/index.js"],
      "env": {
        "ANTHROPIC_API_KEY": "your-key-here"
      }
    }
  }
}

Build

npm install
npm run build

Architecture

Agent hits ceiling
    |
    v
b2a_verify — "here's what's wrong and what's missing"
    |
    v
b2a_discover — "these services can fill each gap"
    |
    v
b2a_call — "here's the result from that service"
    |
    v
Agent breaks through

Core engine extracted from Checkpoint402 v0.3.0 capability discovery protocol.

x402 Ecosystem

200+ services indexed from the x402 ecosystem. Categories:

• 75 Services/Endpoints — callable APIs (risk analysis, market data, AI tools)
• 68 Infrastructure & Tooling — SDKs, facilitators, platforms
• 30 Facilitators — payment processors
• 23 Client-Side Integrations — wallets, browser extensions

License

MIT