Search 14,000+ x402-enabled HTTP APIs by keyword. Pay $0.01 USDC per search on Base
x402search is a discovery engine for x402-enabled HTTP APIs. It indexes 14,000+ resources and lets AI agents find paid API endpoints by keyword — no API keys or accounts required. Agents pay $0.01 USDC per search directly via the x402 micropayment protocol on Base mainnet. Ideal for agents that need to dynamically locate blockchain data APIs, DeFi tools, scraping services, and other x402-paywalled endpoints at runtime.
✓ This is a public API - No credentials needed! Try it right now in the playground.
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Get started quickly with these code examples in your favorite language
curl -X GET \ 'https://www.callio.dev/api/proxy/x402search/forward?target=https%3A%2F%2Fx402search.xyz%2Fendpoint' \ -H 'Authorization: Bearer YOUR_CALLIO_KEY' \ -H 'Content-Type: application/json'💡 Tip: Replace YOUR_CALLIO_KEY with your actual Callio API key from the dashboard.
Test endpoints live or generate your API key and start building in minutes