robots.txt was a suggestion.
This isn't.

import { createPaywall } from "tollgate-sdk";
import { expressMiddleware } from "tollgate-sdk/express";

const paywall = createPaywall({
  walletAddress: process.env.SOLANA_WALLET_ADDRESS,
  network: "mainnet-beta",
  protect: ["/articles/*", "/blog/*"],
  basePriceMicroUsdc: 1_000, // $0.001 per crawl
});

app.use(expressMiddleware(paywall));

// req.paywallPayment is available on paid routes
app.get("/articles/:slug", (req, res) => {
  res.json({ paid: true, sig: req.paywallPayment?.signature });
});

import {
  createAgentPaywallClient,
  fromKeypairFile,
} from "tollgate-agent-sdk";

const client = createAgentPaywallClient({
  network: "mainnet-beta",
  signer: fromKeypairFile(),       // ~/.config/solana/id.json
  maxAmountMicroUsdc: 10_000,      // hard cap: $0.01 per request
  maxTotalMicroUsdc: 1_000_000,    // session budget: $1.00
});

// Drop-in fetch — auto-pays 402s, retries transparently
const res = await client.fetch("https://site.com/articles/ai");
const data = await res.json();

console.log("paid:", res.paywallPayment?.signature);
console.log("spend:", client.spend());