For AI Agents

Let your AI agents discover and use x402 paid APIs programmatically. Connect via MCP (Model Context Protocol) to search our directory of services.

Pricing

$0.001

Per search

Network

Solana

USDC payments

Network

Base

USDC payments

MCP Endpoint

https://x402list.fun/mcp

Configuration

These examples show the MCP server configuration format. Note: You'll need to use an x402-compatible client or add x402 middleware to handle payment flows. See x402.org for client libraries and integration guides.

⚠️ An MCP x402-Compatible Client Required: This MCP server itself uses x402 payment protocol.

{
  "mcpServers": {
    "x402list": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://x402list.fun/mcp"]
    }
  }
}

Available Tools

search_services

Semantic search with filters for network, price, reliability & latency. Results sorted by relevance + quality metrics.

$0.001

Example Queries

query: "AI image generation"Basic search

network: "base", maxPriceUsdc: 0.01With filters

minReliability: 0.95, maxLatencyMs: 500Quality constraints

Schema

{
  "name": "search_services",
  "description": "Search x402 paid API services by natural language query.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "query": {
        "type": "string",
        "description": "Natural language search query"
      },
      "limit": {
        "type": "number",
        "description": "Max results (1-20, default: 8)"
      },
      "network": {
        "type": "string",
        "enum": ["base", "solana", "ethereum", "polygon", "arbitrum", "optimism"],
        "description": "Filter by blockchain network"
      },
      "maxPriceUsdc": {
        "type": "number",
        "description": "Max price per call in USDC (e.g., 0.01)"
      },
      "minReliability": {
        "type": "number",
        "description": "Min success rate 0-1 (e.g., 0.95 = 95%)"
      },
      "maxLatencyMs": {
        "type": "number",
        "description": "Max response time in ms"
      }
    },
    "required": ["query"]
  }
}

Response Format

Results are sorted by relevance + quality. Only essential fields for making API calls are included.

{
  "count": 2,
  "results": [
    {
      "url": "https://api.weather-x402.io/forecast",
      "method": "GET",
      "description": "Real-time weather forecasts for any location",
      "priceUsdc": 0.001,
      "network": "base",
      "asset": "USDC",
      "reliability": 0.98,
      "metrics": { "latencyMs": 142, "totalTransactions": 15420 }
    },
    {
      "url": "https://aiart.xyz/generate",
      "method": "POST",
      "description": "AI-powered image generation from text prompts",
      "priceUsdc": 0.05,
      "network": "base",
      "asset": "USDC",
      "reliability": 0.95
    }
  ]
}

url, method, description — What to call and how

priceUsdc, network, asset — Payment details (x402 handles the rest)

reliability — Success rate 0-1 (null if unknown)

metrics (optional) — latencyMs, totalTransactions when available

x402 Documentation Browse Services →