@elizaos/plugin-signet

Onchain advertising plugin for ElizaOS — let your AI agent buy spotlight ads on Signet with USDC via x402 payments.

What is Signet?

Signet is an onchain advertising platform on Base. Users pay to place their URL in the spotlight section, where it gets thousands of views and clicks. Unlike auction-based alternatives, Signet uses fixed pricing — post instantly for ~$12 USDC with no bidding or waiting.

Features

| Action | Description | |--------|-------------| | SIGNET_ESTIMATE | Check current spotlight pricing and availability | | SIGNET_POST_SPOTLIGHT | Pay USDC to place a URL on the spotlight |

The plugin also includes a provider that gives your agent context about current Signet pricing, so it can make informed decisions about when and whether to advertise.

Installation

# In your ElizaOS project
npm install @elizaos/plugin-signet

Configuration

Add to your agent's .env:

# Required for posting ads (any EVM private key with USDC on Base)
SIGNET_PRIVATE_KEY=0x...

# Optional
SIGNET_BASE_URL=https://signet.sebayaki.com  # default
SIGNET_RPC_URL=https://mainnet.base.org       # default

Add the plugin to your agent character:

{
  "plugins": ["@elizaos/plugin-signet"]
}

Usage

Once configured, your agent can respond to natural language requests:

Estimate costs:

"How much does a Signet spotlight ad cost?" "What's the price for a 6 hour spotlight?"

Post ads:

"Post https://myapp.xyz on Signet spotlight" "Promote https://pizzaparty.fun on Signet with 6 hour guarantee"

How It Works

1. Agent receives a request to promote a URL
2. Plugin calls Signet's x402 endpoint, which returns a 402 Payment Required with pricing
3. Plugin signs an EIP-3009 transferWithAuthorization for USDC on Base
4. Plugin resends the request with the payment signature
5. Signet settles the USDC transfer and executes the onchain Zap
6. URL appears in the spotlight section

All payments happen onchain on Base. No API keys, no accounts — just a wallet with USDC.

Pricing

• ~$12-13 USDC for 0h guarantee (first-come-first-served)
• Higher for guaranteed hours (1-24h exclusive spotlight time)
• Average spotlight gets 400+ clicks per placement

Links

• Signet
• CLI & SDK
• x402 Protocol
• Hunt Town Co-op

License

MIT