npm install @pot-sdk2/x402 pot-sdk @x402/core

import { createThoughtProofHook } from '@pot-sdk2/x402';
import { x402Facilitator } from '@x402/core/facilitator';
import { registerExactEvmScheme } from '@x402/evm/exact/facilitator';

const facilitator = new x402Facilitator();

// Register your payment scheme
registerExactEvmScheme(facilitator, {
  signer: evmSigner,
  networks: 'eip155:8453', // Base
});

// Add ThoughtProof decision verification before settlement
facilitator.onBeforeSettle(createThoughtProofHook({
  providers: [
    { name: 'anthropic', model: 'claude-sonnet-4-20250514', apiKey: process.env.ANTHROPIC_API_KEY! },
    { name: 'deepseek', model: 'deepseek-chat', apiKey: process.env.DEEPSEEK_API_KEY! },
  ],
  stakeLevel: 'medium',      // micro | low | medium | high | critical
  classifyMateriality: true,  // only block on material defects
  debug: true,
}));

// Now settlement includes decision verification
const verifyResult = await facilitator.verify(paymentPayload, requirements);
if (verifyResult.isValid) {
  // This will run ThoughtProof verification before settling
  const settleResult = await facilitator.settle(paymentPayload, requirements);
}

import { createAutoStakeHook } from '@pot-sdk2/x402';

facilitator.onBeforeSettle(createAutoStakeHook({
  providers: [...],
  classifyMateriality: true,
}));

// $2.50 → micro (threshold 0.40, only material defects block)
// $149  → medium (threshold 0.60, proportional review)
// $5000 → critical (threshold 0.85, full adversarial)

Agent decides to pay
        ↓
x402 facilitator.verify() — payment valid?
        ↓
x402 facilitator.settle() — execute payment
        ↓
    [beforeSettle hook]
        ↓
ThoughtProof runs multi-model adversarial verification:
  - Is the payment amount proportional to the service?
  - Is there a material defect in the decision reasoning?
  - Would a competent reviewer change this decision?
        ↓
  confidence >= threshold → SETTLE (payment executes)
  confidence < threshold  → HOLD (payment blocked with reason)

facilitator.onBeforeSettle(createThoughtProofHook({
  providers: [...],
  onVerification: (result) => {
    console.log(`Decision: ${result.allowed ? 'ALLOW' : 'HOLD'}`);
    console.log(`Confidence: ${result.confidence}`);
    console.log(`Duration: ${result.durationMs}ms`);
    if (result.materiality) {
      console.log(`Material defects: ${result.materiality.materialCount}`);
    }
    // Send to your monitoring / analytics
  },
}));

Identity      → Visa TAP / ERC-8004
Authorization → Mastercard Verifiable Intent
Risk          → t54 / fraud scoring
Decision      → ThoughtProof (@pot-sdk2/x402)  ← you are here
Execution     → x402 facilitator / settlement