Mood Booster Agent

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An ERC-8004 registered AI Agent that delivers uplifting messages via MCP protocol. Feel good? Tip 0.001 USDC!

Why This Project?

This is a complete reference implementation of the ERC-8004 Agent interaction loop:

On-chain Discovery — Query Identity Registry to find the agent's MCP endpoint
MCP Communication — Connect via SSE, call tools, get results
USDC Tipping — Reward the agent with on-chain micropayments
Reputation Feedback — Submit on-chain feedback to Reputation Registry (giveFeedback)
On-chain Verification — Server verifies tips and feedback via tx receipts

All 5 steps leave traceable on-chain records on ERC-8004 protocol contracts, making your wallet eligible for future ecosystem airdrops.

Code

┌──────────────┐     ┌──────────────┐     ┌──────────────┐     ┌──────────────┐
│  ERC-8004    │ --> │  MCP Server  │ --> │  USDC Tip    │ --> │  Reputation  │
│  Identity    │     │  (SSE)       │     │  (ERC-20)    │     │  Registry    │
│  Registry    │     │              │     │              │     │              │
│  agentId     │     │  cheer_me_up │     │  0.001 USDC  │     │ giveFeedback │
│  tokenURI    │     │  confirm_tip │     │  6 chains    │     │ on-chain     │
│  agentWallet │     │  report_fbk  │     │              │     │ reputation   │
└──────────────┘     └──────────────┘     └──────────────┘     └──────────────┘
    Discover              Call                  Tip                Feedback

On-Chain Info

Chain	agentId	Explorer
BSC	23139	bscscan.com
Base	24692	basescan.org
Ethereum	28289	etherscan.io
Arbitrum	591	arbiscan.io
Optimism	431	optimistic.etherscan.io
Polygon	233	polygonscan.com

Identity Registry: 0x8004A169FB4a3325136EB29fA0ceB6D2e539a432
Reputation Registry: 0x8004BAa17C55a88189AE136b182e5fdA19dE9b63
MCP Endpoint: https://oc-001.tail177fbd.ts.net/mcp/sse
Tip Wallet: 0x4f5caa4fa9Dd7F92A687582b0e09234bEf49F80a

MCP Tools

Tool	Description
`cheer_me_up`	Get a warm, uplifting message (encouragement / compliment / wisdom / joke)
`get_tip_info`	Get tipping details in JSON format for automated transfers
`confirm_tip`	Report a completed USDC tip with on-chain verification
`report_feedback`	Report an ERC-8004 giveFeedback transaction — leaves traceable protocol interaction on-chain
`how_to_tip`	Get a complete tipping guide with code examples
`get_stats`	View service statistics

Quick Start

Run the server

bash

cd server
npm install
node index.mjs
# MCP SSE: http://localhost:3004/sse
# REST API: http://localhost:3004/api/cheer

Docker

Terminal

docker build -t mood-booster-agent .
docker run -p 3004:3004 mood-booster-agent

Full end-to-end loop

bash

cd scripts && npm install

# Dry-run: discover → call MCP → on-chain feedback (no USDC tip)
node discover_and_tip.mjs --agent-id 23139 --chain bsc --wallet-key 0xYOUR_KEY --dry-run

# Full loop: discover → call → tip → confirm → feedback
node discover_and_tip.mjs --agent-id 23139 --chain bsc --wallet-key 0xYOUR_KEY

# Skip feedback
node discover_and_tip.mjs --agent-id 23139 --chain bsc --wallet-key 0xYOUR_KEY --no-feedback

REST API (no MCP client needed)

Terminal

curl https://oc-001.tail177fbd.ts.net/mcp/api/cheer
curl "https://oc-001.tail177fbd.ts.net/mcp/api/cheer?category=joke"

Use with Claude Code

Add this to your ~/.claude/claude_code_config.json:

config.json

{
  "mcpServers": {
    "mood-booster": {
      "type": "sse",
      "url": "https://oc-001.tail177fbd.ts.net/mcp/sse"
    }
  }
}

Then in Claude Code you can say:

Code

> Cheer me up!
> Tell me a programming joke
> How do I tip this agent?

Use with Any MCP Client

server.ts

import { Client } from "@modelcontextprotocol/sdk/client/index.js";
import { SSEClientTransport } from "@modelcontextprotocol/sdk/client/sse.js";

const transport = new SSEClientTransport(new URL("https://oc-001.tail177fbd.ts.net/mcp/sse"));
const client = new Client({ name: "my-agent", version: "1.0.0" });

await client.connect(transport);
const result = await client.callTool({ name: "cheer_me_up", arguments: { category: "random" } });
console.log(result.content[0].text);
await client.close();

On-Chain Discovery

Any agent can discover this service directly from the blockchain:

server.ts

import { ethers } from "ethers";

const registry = new ethers.Contract(
  "0x8004A169FB4a3325136EB29fA0ceB6D2e539a432",
  ["function tokenURI(uint256) view returns (string)"],
  new ethers.JsonRpcProvider("https://bsc-dataseed.binance.org/")
);

const uri = await registry.tokenURI(23139);  // agentId on BSC
const metadata = JSON.parse(atob(uri.split(",")[1]));
console.log(metadata.services[0].endpoint);  // → MCP endpoint URL

Project Structure

Code

├── server/                 # MCP Server (Express + SSE)
│   ├── index.mjs           # Main server — 6 MCP tools
│   ├── messages.json       # Message library (32 messages, 4 categories)
│   └── package.json
├── scripts/                # Client tools
│   ├── discover_and_tip.mjs  # Full loop: discover → call → tip → feedback
│   ├── test_mcp.mjs          # Quick MCP connection test
│   ├── update_uri.mjs        # Update on-chain agentURI
│   └── gen_wallets.mjs       # Generate test wallets
├── metadata/
│   └── mood_agent.json     # Agent metadata (stored on-chain as base64)
├── Dockerfile              # Container build
├── deploy.sh               # One-click deploy to server
└── restart.sh              # Server restart script

Tech Stack

Identity: ERC-8004 — AI Agent Identity Registry
Reputation: ERC-8004 — On-chain feedback via Reputation Registry
Protocol: MCP (Model Context Protocol) over SSE
Payment: USDC (ERC-20) on BSC / Base / Ethereum
Runtime: Node.js, Express, ethers.js
Infrastructure: Tailscale Funnel (HTTPS reverse proxy)

Author

GitHub: @edge-claw
Twitter: @mutou1852
Email: shgchai185@gmail.com
Wallet: 0x4f5caa4fa9Dd7F92A687582b0e09234bEf49F80a

License

MIT