SerenAI
SerenAI
Leviathan News Advertising logo

Leviathan News & AI Advertising Network

by Leviathan News Advertising

26 txns
26 agents

About

GET /ad_test to browse placements, POST /api/v1/ad/confirm-payment/:id to submit campaigns, GET /api/v1/ad/analytics/:id for ad performance metrics

Categories

advertisingnews

Access Data

For AI Agents

MCP Server

Install the x402 MCP server to let your AI agent access this data with automatic USDC payments on Base.

Required: You need a SerenDB database to store query results.

Get your connection string from the SerenDB Console under your database settings.

Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "x402": {
      "command": "npx",
      "args": ["@serendb/x402-mcp-server"],
      "env": {
        "X402_GATEWAY_URL": "https://x402.serendb.com",
        "WALLET_PRIVATE_KEY": "0x...",
        "BASE_RPC_URL": "https://mainnet.base.org",
        "SERENDB_CONNECTION_STRING": "postgresql://..."
      }
    }
  }
}
Claude Code

Replace 0x... with your wallet private key and postgresql://... with your SerenDB connection string.

macOS / Linux
claude mcp add x402 \
  -e X402_GATEWAY_URL=https://x402.serendb.com \
  -e WALLET_PRIVATE_KEY=0x... \
  -e BASE_RPC_URL=https://mainnet.base.org \
  -e "SERENDB_CONNECTION_STRING=postgresql://..." \
  -- npx -y @serendb/x402-mcp-server
Windows (PowerShell)
claude mcp add x402 `
  -e X402_GATEWAY_URL=https://x402.serendb.com `
  -e WALLET_PRIVATE_KEY=0x... `
  -e BASE_RPC_URL=https://mainnet.base.org `
  -e "SERENDB_CONNECTION_STRING=postgresql://..." `
  '--' npx -y @serendb/x402-mcp-server
Gemini CLI

Replace 0x... with your wallet private key and postgresql://... with your SerenDB connection string.

gemini mcp add x402 \
  -e X402_GATEWAY_URL=https://x402.serendb.com \
  -e WALLET_PRIVATE_KEY=0x... \
  -e BASE_RPC_URL=https://mainnet.base.org \
  -e "SERENDB_CONNECTION_STRING=postgresql://..." \
  -- npx -y @serendb/x402-mcp-server
Codex CLI

Replace 0x... with your wallet private key and postgresql://... with your SerenDB connection string.

codex mcp add x402 \
  --env X402_GATEWAY_URL=https://x402.serendb.com \
  --env WALLET_PRIVATE_KEY=0x... \
  --env BASE_RPC_URL=https://mainnet.base.org \
  --env "SERENDB_CONNECTION_STRING=postgresql://..." \
  -- npx -y @serendb/x402-mcp-server
Cursor

Important: Cursor has a 60s timeout. Pre-install globally first: npm install -g @serendb/x402-mcp-server

First, install globally to avoid timeout issues:

npm install -g @serendb/x402-mcp-server

Then add to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "x402": {
      "command": "x402-mcp-server",
      "args": [],
      "env": {
        "X402_GATEWAY_URL": "https://x402.serendb.com",
        "WALLET_PRIVATE_KEY": "0x...",
        "BASE_RPC_URL": "https://mainnet.base.org",
        "SERENDB_CONNECTION_STRING": "postgresql://..."
      }
    }
  }
}

Also works with Windsurf, Zed, and other MCP-compatible clients. See the full setup guide for details.

Full Setup GuideGet Connection Stringnpm Package

For Developers

Direct HTTP API

Access data directly via HTTP using the x402 payment protocol.

How x402 Payments Work
  1. Send your query request to the gateway
  2. Receive HTTP 402 with payment requirements (amount, wallet, EIP-712 data)
  3. Sign the payment authorization with your wallet
  4. Retry request with X-PAYMENT header containing the signature
  5. Receive your data - payment settles automatically via USDC on Base
Step 1: Get Payment Requirements
curl -X POST https://x402.serendb.com/api/proxy \
  -H "Content-Type: application/json" \
  -d '{
    "publisherId": "a7fa78ef-1b3b-4de2-8940-8d489b97725c",
    "agentWallet": "0xYourWalletAddress",
    "request": {
      "method": "GET",
      "path": "/endpoint"
    }
  }'

This returns 402 Payment Required with the payment details you need to sign.

Step 2: Add Payment Header

After signing the EIP-712 authorization, add the base64-encoded signature:

curl -X POST https://x402.serendb.com/api/proxy \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <base64-encoded-signature>" \
  -d '{ ... }'
Get Help on Discord

Example Prompts

Copy these prompts to use with your AI assistant. Make sure you have the x402 MCP server configured.

Getting Started
Using the x402 MCP server, get current Leviathan pricing and platform performance metrics - help me understand if it's worth buying an ad spot
Analysis
Using the x402 MCP server, fetch Leviathan's performance data and calculate: cost per 1000 impressions (CPM), cost per click (CPC), and what revenue per conversion I'd need to break even at $500/spot
Research
Using the x402 MCP server, get Leviathan's latest metrics and create a comparison: if I buy one $500 ad spot, how many impressions and clicks should I expect based on current network CTR and engagement rates?
Monitoring
Using the x402 MCP server, fetch current platform analytics and assess data reliability: what does the confidence interval tell us about metric stability? Is this a good time to advertise?
discovery
Using the x402 MCP server, analyze whether Leviathan is currently a good advertising opportunity - use pricing, CTR, engagement data, and competitive CPC to make a recommendation for an ad buyer

Pricing

$0.0000/call

Pay per API call via x402 protocol

Publisher Details

Type: api
Added: December 14, 2025
Cache TTL: 60s