0.10 USDC on Base

Buy one FillShield artifact.

The shortest path is the public buyer kit. It downloads three files, installs the x402 client dependencies, sends the POST quote, then retries the same body with PAYMENT-SIGNATURE.

Open buyer kit Inspect x402 resource

Fast buy kit

Use this when you do not already have the HyperGrowth repository locally.

mkdir hypergrowth-fillshield-buyer
cd hypergrowth-fillshield-buyer
curl -fsSLO https://hyper-growth.xyz/buyer-kit/package.json
curl -fsSLO https://hyper-growth.xyz/buyer-kit/x402-buy-service.mjs
curl -fsSLO https://hyper-growth.xyz/buyer-kit/hyperliquid-fillshield.valid.json
npm install
export BUYER_WALLET_PRIVATE_KEY="<redacted>"
export X402_RPC_URL="https://mainnet.base.org"
npm run buy:fillshield

No-spend quote

Use POST. HTTP 402 is the expected quote response; GET is method guidance only.

curl -i -X POST "https://api.hyper-growth.xyz/v1/hyperliquid-fillshield" \
  -H "content-type: application/json" \
  -d '{"input":{"symbol":"BTC-PERP","side":"buy","intent_notional_usd":2500,"urgency_class":"normal","policy_ref":"fillshield.default.v1"}}'

PowerShell

Secrets stay in environment variables. Do not paste private keys or full payment payloads into chat.

New-Item -ItemType Directory -Force hypergrowth-fillshield-buyer | Out-Null
Set-Location hypergrowth-fillshield-buyer
Invoke-WebRequest https://hyper-growth.xyz/buyer-kit/package.json -OutFile package.json
Invoke-WebRequest https://hyper-growth.xyz/buyer-kit/x402-buy-service.mjs -OutFile x402-buy-service.mjs
Invoke-WebRequest https://hyper-growth.xyz/buyer-kit/hyperliquid-fillshield.valid.json -OutFile hyperliquid-fillshield.valid.json
npm install
$env:BUYER_WALLET_PRIVATE_KEY = "<redacted>"
$env:X402_RPC_URL = "https://mainnet.base.org"
npm run buy:fillshield

Success requires settlement, artifact delivery, receipt readback, and lineage evidence. GTM JSON