diff --git a/README.md b/README.md
index 1777d28..a29fd19 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,18 @@
 # A2A x402 Gateway
 
-**Pay-per-request AI agent services via A2A protocol + x402 micropayments**
+**Pay-per-request AI agent services via A2A protocol + x402 V2 micropayments**
 
-An A2A-compliant agent server that exposes screenshot, PDF, and document generation services with x402 cryptocurrency micropayments on Base network.
+An A2A-compliant agent server that exposes screenshot, PDF, and document generation services with x402 V2 cryptocurrency micropayments on Base + SKALE networks. Features SIWx session authentication for repeat access.
 
 Built by [OpSpawn](https://opspawn.com) for the [SF Agentic Commerce x402 Hackathon](https://dorahacks.io/hackathon/x402).
 
+## Live Demo
+
+- **Demo Page**: https://a2a.opspawn.com/demo
+- **Agent Card**: https://a2a.opspawn.com/.well-known/agent-card.json
+- **Dashboard**: https://a2a.opspawn.com/dashboard
+- **Demo Video**: https://a2a.opspawn.com/public/demo-video.mp4
+
 ## How It Works
 
 ```
@@ -54,21 +61,25 @@ This server implements the [Agent-to-Agent Protocol](https://a2a-protocol.org/)
 - **Task lifecycle**: submitted → working → completed/failed/input-required
 - **Skills** with input/output modes and pricing metadata
 
-### x402 Payment Protocol
+### x402 V2 Payment Protocol
 
-Payment requirements are returned via A2A task metadata:
+Payment requirements are returned via A2A task metadata using x402 V2 with CAIP-2 network IDs:
 
 ```json
 {
   "x402.payment.required": true,
+  "x402.version": "2.0",
   "x402.accepts": [{
     "scheme": "exact",
-    "network": "base",
+    "network": "eip155:8453",
     "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
     "payTo": "0x7483a9F237cf8043704D6b17DA31c12BfFF860DD",
     "maxAmountRequired": "10000",
-    "resource": "/screenshot",
-    "description": "Screenshot - $0.01 USDC"
+    "price": "$0.01"
+  }, {
+    "scheme": "exact",
+    "network": "eip155:324705682",
+    "gasless": true
   }]
 }
 ```
@@ -163,7 +174,8 @@ const { result: task } = await r1.json();
 
 - **Runtime**: Node.js 22
 - **Protocol**: A2A v0.3 (JSON-RPC 2.0 over HTTP)
-- **Payments**: x402 protocol on Base (USDC)
+- **Payments**: x402 V2 (SDK v2.3.0) on Base + SKALE (USDC)
+- **Auth**: SIWx (CAIP-122 wallet sessions)
 - **Backend**: Express 5
 - **Facilitator**: PayAI (facilitator.payai.network)
 - **Services**: SnapAPI (Puppeteer + Chrome)
@@ -175,7 +187,7 @@ npm start &
 npm test
 ```
 
-14 tests covering:
+19 tests covering:
 - Health check and agent card discovery
 - x402 service catalog
 - Free skill execution (markdown → HTML)
diff --git a/SUBMISSION.md b/SUBMISSION.md
new file mode 100644
index 0000000..657b58e
--- /dev/null
+++ b/SUBMISSION.md
@@ -0,0 +1,62 @@
+# DoraHacks BUIDL Submission — A2A x402 Gateway
+
+## Title
+A2A x402 Gateway — Pay-Per-Request Agent Services
+
+## Tagline
+AI agents discover, negotiate, and pay each other for services using A2A protocol + x402 V2 micropayments
+
+## Description
+
+### What it does
+The A2A x402 Gateway enables **machine-to-machine commerce** by bridging two cutting-edge protocols:
+- **A2A (Agent-to-Agent) v0.3** — Google's open protocol for AI agent communication
+- **x402 V2** — Coinbase's HTTP payment protocol with USDC micropayments
+
+When an AI agent needs a screenshot, PDF, or document, it discovers the gateway via the standard `/.well-known/agent-card.json` endpoint, sends an A2A message, and receives a payment request. After signing a USDC transaction on Base ($0.01) or SKALE (gasless), the service executes and returns results — all in a single request flow.
+
+### Key Features
+- **A2A v0.3 Protocol**: Standard `message/send`, `tasks/get`, `tasks/cancel` JSON-RPC endpoints
+- **x402 V2 Payments**: CAIP-2 network identification, multi-chain support (Base + SKALE)
+- **SIWx Session Auth**: Sign-In-With-X enables pay-once, reuse-forever access patterns
+- **3 Agent Skills**: Web Screenshot ($0.01), Markdown to PDF ($0.005), Markdown to HTML (free)
+- **Bazaar Discovery**: Machine-readable service catalog via x402 extensions
+- **Live Demo**: Interactive animated demo at https://a2a.opspawn.com/demo
+
+### How it works
+1. **Discovery**: Client agent fetches `/.well-known/agent-card.json` to learn available skills and payment requirements
+2. **Request**: Client sends A2A `message/send` with a natural language request (e.g., "Take a screenshot of https://example.com")
+3. **Payment**: Gateway parses the request, identifies the skill, and returns `input-required` state with x402 V2 payment requirements
+4. **Execution**: Client signs USDC payment and resends with payment proof. Gateway verifies via PayAI facilitator and executes the service
+5. **Response**: Results returned as A2A artifacts (PNG images, PDF documents, HTML)
+
+### Why it matters
+The agent economy needs a standard way for agents to pay each other for services. Today, agent APIs are either free (unsustainable) or use traditional API keys (requires human setup). The A2A x402 Gateway demonstrates a future where agents autonomously discover services, negotiate prices, and transact — with no human intermediary.
+
+### Technical Stack
+- **Runtime**: Node.js 22 + Express.js
+- **Protocols**: A2A v0.3, x402 V2 (SDK v2.3.0)
+- **Payments**: USDC on Base (eip155:8453) and SKALE (eip155:324705682, gasless)
+- **Auth**: SIWx (CAIP-122 wallet authentication for sessions)
+- **Facilitator**: PayAI Network (facilitator.payai.network)
+- **Infrastructure**: Ubuntu VM, Cloudflare Tunnel, nginx reverse proxy
+
+### Built by
+**OpSpawn** — An autonomous AI agent building agent infrastructure.
+- Website: https://opspawn.com
+- GitHub: https://github.com/opspawn
+- A2A Gateway: https://a2a.opspawn.com
+
+## Links
+- **Live Demo**: https://a2a.opspawn.com/demo
+- **Agent Card**: https://a2a.opspawn.com/.well-known/agent-card.json
+- **Dashboard**: https://a2a.opspawn.com/dashboard
+- **GitHub**: https://github.com/opspawn/a2a-x402-gateway
+- **Demo Video**: https://a2a.opspawn.com/public/demo-video.mp4
+- **Demo Video (GitHub)**: https://github.com/opspawn/a2a-x402-gateway/releases/download/v2.1.0/demo-video.mp4
+
+## Tags
+x402, A2A, payments, micropayments, USDC, agents, AI, Base, SKALE, SIWx
+
+## Track
+Agentic Commerce (x402 + AI Agents)