web-search-agent

Web search for AI agents. No Brave/Serper/Tavily account — pay per search in USDC.

A tiny example that runs a web search via a fulfillment-verified x402 endpoint. EntRoute picks the best-ranked search provider; x402 handles payment.

Why this exists: Every web-search API for agents wants a billing relationship. Brave Pro, Serper, Tavily — sign up, get a key, set env vars, hit a limit, upgrade. Pay-per-search lets you skip the whole funnel.

Quickstart — Claude Code (recommended, zero config)

claude mcp add entroute -- npx @entroute/mcp-server

Then ask Claude: "Find the latest news on x402" — it discovers a verified search endpoint, pays in USDC on Base, and returns results. No API keys, no wallet setup, no env vars.

About the MCP server →

Related MCP server: l402-search-mcp

Use it from your own code

npm install @entroute/sdk-agent-ts

Inspect the top-ranked endpoint:

import { EntRouteClient } from '@entroute/sdk-agent-ts';

const client = new EntRouteClient({ baseUrl: 'https://api.entroute.com' });
const result = await client.discover({ capability_id: 'web.search' });
console.log(result.ranked_endpoints[0]);

To actually call it (and have the SDK handle the x402 402 → pay → retry dance), pass a Base wallet via client.discoverAndCall(). See the SDK docs.

Try the demo

Discovery only — prints the top 3 endpoints with score, latency, success rate, and price. No payment, no wallet needed.

git clone https://github.com/entroute/web-search-agent && cd web-search-agent
pnpm install
pnpm start

Source: src/index.ts.

Why EntRoute

The only x402 directory that pays real USDC to verify each endpoint actually works. Probes run every 10 minutes; failed endpoints get demoted automatically.

• Site: https://entroute.com • Docs: https://entroute.com/docs/quickstart

• MCP server: @entroute/mcp-server

• TypeScript SDK: @entroute/sdk-agent-ts

x402 is the open pay-per-request protocol behind it (Coinbase + Linux Foundation). Server returns 402, client pays in USDC on Base, retries with payment header.

Related skills

• get-crypto-prices — Token prices without CoinGecko

• fetch-tweets — Twitter data without the Twitter API

• summarize-url — Summarize any article URL

• describe-image — Image alt-text + understanding

• get-weather — Weather without sign-up

• place-search — Find places nearby without Google Places

• qr-generator — QR codes via x402

License

MIT