💸 Bonanza x402 Adapter

Spending firewall meets the HTTP 402 payment protocol

Bonanza x402 brings policy-based spending controls to the x402 payment protocol. Every payment request goes through a firewall that checks budgets, risk scores, vendor allowlists, and approval queues — before money moves.

Why?

AI agents are starting to spend real money via the x402 protocol. But x402 alone doesn't answer:

• "Is this payment within budget?"
• "Is this vendor trusted?"
• "Should a human approve this?"
• "What's the risk level of this transaction?"

Bonanza x402 adds these guardrails. Think of it as ulimit for agent payments — but with Stripe checkout, crypto wallets, and approval flows.

Quick Start

pip install bonanza-x402

Basic: Wrap any x402 payment with a budget

from bonanza_x402 import Firewall, Policy

# Define your spending policy
policy = Policy(
    max_spend_usd=10.00,          # Hard limit per session
    daily_budget_usd=50.00,       # Daily cap
    allowed_networks=["base"],     # Only Base chain
    allowed_tokens=["usdc"],      # Only USDC
    require_approval_above=5.00,  # Human approval above $5
    trusted_vendors=["api.weather.com", "api.data.gov"],
)

# Create the firewall
firewall = Firewall(policy=policy)

# Check before paying
result = firewall.evaluate(
    amount=3.50,
    vendor="api.weather.com",
    network="base",
    token="usdc",
    description="Weather API call"
)

if result.approved:
    print(f"✅ Payment approved: {result.reason}")
else:
    print(f"❌ Payment blocked: {result.reason}")
    if result.requires_approval:
        print(f"⏳ Awaiting human approval: {result.approval_url}")

With x402 Protocol Integration

import x402
from bonanza_x402 import Firewall, Policy

# Set up x402 client
client = x402.Client()

# Set up Bonanza firewall
firewall = Firewall(Policy(
    max_spend_usd=25.00,
    trusted_vendors=["api.premium-data.com"],
    require_approval_above=10.00,
))

# Wrap x402 calls with firewall
response = client.get(
    "https://api.premium-data.com/v1/analysis",
    payment_config=x402.PaymentConfig(
        max_amount=5.00,
        network="base",
    ),
    # Bonanza intercepts before payment is sent
    pre_payment_hook=firewall.x402_hook(),
)

Stripe Checkout Fallback

For payments that need human approval, Bonanza creates a Stripe Checkout session:

from bonanza_x402 import Firewall, Policy, StripeConfig

firewall = Firewall(
    policy=Policy(
        max_spend_usd=100.00,
        require_approval_above=25.00,
    ),
    stripe=StripeConfig(
        api_key="sk_live_...",
        success_url="https://your-app.com/success",
        cancel_url="https://your-app.com/cancel",
    ),
)

result = firewall.evaluate(amount=50.00, vendor="api.expensive-ai.com")
# result.approved = False
# result.checkout_url = "https://checkout.stripe.com/pay/cs_live_..."

Policy Rules

Firewall Result

@dataclass
class FirewallResult:
    approved: bool           # Whether the payment is allowed
    reason: str              # Human-readable explanation
    risk_score: float        # 0-1 risk assessment
    requires_approval: bool  # Whether human approval is needed
    approval_url: str | None # Stripe checkout URL if approval needed
    transaction_id: str      # Unique ID for audit trail
    metadata: dict           # Additional context

Audit Trail

Every evaluation is logged:

# Get audit log
entries = firewall.audit_log()

for entry in entries:
    print(f"{entry.timestamp} | {entry.amount} | {entry.vendor} | {entry.decision} | {entry.reason}")

CLI

# Evaluate a payment
bonanza-x402 evaluate --amount 5.00 --vendor api.weather.com --network base

# Check policy status
bonanza-x402 policy show

# View audit log
bonanza-x402 audit log

# Create a test checkout
bonanza-x402 checkout --amount 10.00 --stripe-key sk_test_...

Architecture

┌─────────────┐     ┌──────────────────────┐     ┌─────────────┐
│  AI Agent   │────▶│  Bonanza Firewall    │────▶│  x402 Proto  │
│             │     │                      │     │  (Payment)   │
└─────────────┘     │  ┌──────────────┐   │     └─────────────┘
                    │  │ Policy Check  │   │
                    │  ├──────────────┤   │     ┌─────────────┐
                    │  │ Risk Score    │───┼────▶│  Stripe      │
                    │  ├──────────────┤   │     │  (Approval)  │
                    │  │ Vendor List   │   │     └─────────────┘
                    │  ├──────────────┤   │
                    │  │ Budget Check  │   │     ┌─────────────┐
                    │  └──────────────┘   │────▶│  Audit Log   │
                    └──────────────────────┘     └─────────────┘

Comparison

Requirements

• Python 3.10+
• x402>=2.0 (optional, for protocol integration)
• stripe>=5.0 (optional, for checkout fallback)
• solana>=0.30 (optional, for Solana payments)

License

Apache License 2.0 — see LICENSE for details.

Links

• Website: bonanza-labs.com
• Live Demo: bonanza-labs.com/firewall
• x402 Protocol: github.com/x402-foundation/x402
• Agent Wallet: github.com/c6zks4gssn-droid/bonanza-labs-website

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