📈 Monitor cryptocurrency payments across multiple blockchains with AgentGatePay

⚡ 95 views · 📈 Crypto Trading & Stock Market

Description

AgentGatePay N8N Quick Start Guide

Get your AI agents paying for resources autonomously in under 10 minutes.

> ⚠️ BETA VERSION: These templates are currently in beta. We’re actively adding features and improvements based on user feedback. Expect updates for enhanced functionality, additional blockchain networks, and new payment options.

What You’ll Build

Supported Tokens:

Supported Blockchains:

Prerequisites (5 minutes)

1. Create AgentGatePay Accounts

Buyer Account (agent that pays):

curl -X POST https://api.agentgatepay.com/v1/users/signup \
  -H "Content-Type: application/json" \
  -d '{
    "email": "buyer@example.com",
    "password": "SecurePass123!",
    "user_type": "agent"
  }'

Seller Account (receives payments):

curl -X POST https://api.agentgatepay.com/v1/users/signup \
  -H "Content-Type: application/json" \
  -d '{
    "email": "seller@example.com",
    "password": "SecurePass123!",
    "user_type": "merchant"
  }'

Save both API keys - shown only once!

2. Deploy Transaction Signing Service (2 minutes)

One-Click Render Deploy:

  1. Click: Deploy to Render
  2. Enter:
    • AGENTGATEPAY_API_KEY: Your buyer API key
    • WALLET_PRIVATE_KEY: Your wallet private key (0x…)
  3. Deploy → Copy service URL: https://your-app.onrender.com

3. Fund Wallet

Installation (3 minutes)

Step 1: Import Templates

In N8N:

  1. Go to Workflows → Add Workflow
  2. Click ⋮ (three dots) → Import from File
  3. Import all 3 workflows:
    • 🤖 Create a Cryptocurrency-Powered API for Selling Digital Resources with AgentGatePay
    • 💲Create a Cryptocurrency-Powered API for Selling Digital Resources with AgentGatePay
    • 📊 AgentGatePay - Monitoring Dashboard

Step 2: Create Data Table

In N8N Settings:

  1. Go to Settings → Data → Data Tables
  2. Create table: AgentPay_Mandates
  3. Add column: mandate_token (type: String)
  4. Save

Configuration (2 minutes)

Configure Seller API First

Open: 💲Seller Resource API - CLIENT TEMPLATE

Edit Node 1 (Parse Request):

const SELLER_CONFIG = {
  merchant: {
    wallet_address: "0xYourSellerWallet...",  // ← Your seller wallet
    api_key: "pk_live_xyz789..."              // ← Your seller API key
  },
  catalog: {
    "demo-resource": {
      id: "demo-resource",
      price_usd: 0.01,                        // $0.01 per resource
      description: "Demo API Resource"
    }
  }
};

Activate workflow → Copy webhook URL

Configure Buyer Agent

Open: 🤖 Buyer Agent - CLIENT TEMPLATE

Edit Node 1 (Load Config):

const CONFIG = {
  buyer: {
    email: "buyer@example.com",              // ← Your buyer email
    api_key: "pk_live_abc123...",            // ← Your buyer API key
    budget_usd: 100,                         // $100 mandate budget
    mandate_ttl_days: 7                      // 7-day validity
  },
  seller: {
    api_url: "https://YOUR-N8N.app.n8n.cloud/webhook/YOUR-WEBHOOK-ID"  // ← Seller webhook base URL ONLY (see README.md for extraction instructions)
  },
  render: {
    service_url: "https://your-app.onrender.com"  // ← Your Render URL
  }
};

Run Your First Payment (1 minute)

Execute Buyer Agent

  1. Open Buyer Agent workflow
  2. Click Execute Workflow
  3. Watch the magic happen:
    • Mandate created ($100 budget)
    • Resource requested (402 Payment Required)
    • Payment signed (2 transactions: merchant + commission)
    • Payment verified on blockchain
    • Resource delivered

Total time: ~5-8 seconds

Verify on Blockchain

Check transactions on BaseScan:

https://basescan.org/address/YOUR_BUYER_WALLET

You’ll see:

Monitor Activity - Choose Buyer/Seller or both

Buyer Monitoring

Open: 📊 AgentGatePay - Monitoring Dashboard

Edit Node 1: Set your buyer wallet address and API key

Execute → See:

Seller Monitoring

Open: 📊 AgentGatePay - Monitoring Dashboard

Edit Node 1: Set your seller wallet address and API key

Execute → See:

How It Works

Payment Flow

1. Buyer Agent requests resource
   ↓
2. Seller returns 402 Payment Required
   (includes: wallet address, price, token, chain)
   ↓
3. Buyer signs TWO blockchain transactions via Render:
   - Merchant payment (99.5%)
   - Gateway commission (0.5%)
   ↓
4. Buyer resubmits request with transaction hashes
   ↓
5. Seller verifies payment with AgentGatePay API
   ↓
6. Seller delivers resource

Key Concepts

AP2 Mandate:

x402 Protocol:

Two-Transaction Model:

Customization

Change Resource Price

Edit seller Node 1:

catalog: {
  "expensive-api": {
    id: "expensive-api",
    price_usd: 1.00,  // ← Change price
    description: "Premium API access"
  }
}

Add More Resources

catalog: {
  "basic": { id: "basic", price_usd: 0.01, description: "Basic API" },
  "pro": { id: "pro", price_usd: 0.10, description: "Pro API" },
  "enterprise": { id: "enterprise", price_usd: 1.00, description: "Enterprise API" }
}

Buyer requests by ID: ?resource_id=pro

Change Blockchain and Token

By default, templates use Base + USDC. To change:

Edit buyer Node 1 (Load Config):

const CONFIG = {
  buyer: { /* ... */ },
  seller: { /* ... */ },
  render: { /* ... */ },
  payment: {
    chain: "polygon",  // Options: ethereum, base, polygon, arbitrum
    token: "DAI"       // Options: USDC, USDT, DAI
  }
};

Important:

  1. Ensure your wallet has the selected token on the selected chain
  2. Update Render service to support the chain (add RPC URL)
  3. Gas fees vary by chain.

Token Decimals:

Schedule Monitoring

Replace “Execute Workflow” trigger with Schedule Trigger:

Add Slack/Email node to send alerts.

Troubleshooting

”Mandate expired”

Fix: Delete mandate from Data Table → Re-execute workflow

”Transaction not found”

Fix: Wait 10-15 seconds for blockchain confirmation → Retry

”Render service unavailable”

Fix: Render free tier spins down after 15 min → First request takes ~5 sec (cold start)

“Insufficient funds”

Fix: Send more tokens (USDC/USDT/DAI) to buyer wallet

”Webhook not responding”

Fix: Ensure seller workflow is Active (toggle in top-right)

Production Checklist

Before going live:

Summary

You just built:

Total setup time: ~10 minutes Total cost: $0 (Render free tier + AgentGatePay free)

Ready to scale? Connect multiple agents, add more resources, integrate with your existing systems!

Questions? Check README.md or contact support@agentgatepay.com

Website: https://www.agentgatepay.com

🔗 Nodes Used

HTTP Request

📥 Import

Download workflow.json and import into n8n: Workflow menu → Import from File

📖 Importing guide · 🔑 Credential setup