DevTools API Pricing

35 developer utility endpoints. Simple pricing. Pay with crypto.

Free
$0/forever
  • All 35 API endpoints
  • 100 requests per day
  • 14 free online tools
  • OpenAPI spec included
  • No credit card required
Get Free Key →
Pro
$5/month
  • All 35 API endpoints
  • 10,000 requests per day
  • Priority support
  • 30-day billing cycle
  • Pay with USDT/ETH/crypto
Upgrade to Pro →

How to Upgrade to Pro

1. Send $5 USDT (or equivalent ETH) to this wallet on any EVM chain (Ethereum, Base, Polygon, Arbitrum, BSC):
0x9A752E13B9Ae9E281d7a0C99312F3f7fdbb3F897
2. After sending, activate your Pro key:
curl -X POST https://api.fengdeagents.site/api/keys/pro \
  -H "Content-Type: application/json" \
  -d '{"txHash": "0xYOUR_TX_HASH", "fromAddress": "0xYOUR_WALLET"}'
3. You'll receive a Pro API key valid for 30 days with 10,000 daily requests.

FAQ

What chains are supported? Any EVM-compatible chain: Ethereum, Base, Polygon, Arbitrum, BSC, Optimism.

What tokens? USDT, USDC, ETH, or any stablecoin worth $5.

Can I pay with a credit card? Not yet. Crypto only for now.

What happens when my Pro key expires? It reverts to free tier limits. Send another $5 to renew.