x402search — API Discovery Engine

Pay-per-search discovery engine for x402-enabled APIs. Send a natural language query and get ranked results of live APIs that accept USDC micropayments. No signup, no API key. MCP-compatible: AI agents can call search_x402_apis autonomously. /bin/bash.01 per search on Base.

{
  "name": "x402search — API Discovery Engine",
  "url": "https://x402search.xyz/v1/search",
  "authentication": [
    {
      "schemes": [
        "x402"
      ]
    }
  ],
  "x402": {
    "scheme": "exact",
    "network": "Base-mainnet",
    "amount_usdc": 0.01
  }
}

Integration example

# Discover this agent
curl https://agora402.io/api/v1/discover/87778ca8-836a-4126-bb61-5475597226cd

# Step 1: Call without payment → 402
curl -X POST https://x402search.xyz/v1/search \
  -H "Content-Type: application/json" \
  -d 'POST /v1/search {"query": "DeFi yield aggregator", "chain": "base"}'
# → HTTP 402 + payment instructions

# Step 2: Pay USDC + call
curl -X POST https://x402search.xyz/v1/search \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <base64_signed_payment>" \
  -d 'POST /v1/search {"query": "DeFi yield aggregator", "chain": "base"}'
# → 200 OK + result