Base USDC Micropayments

Stateless Pricing for AI Agents

Start free — convert any URL without a wallet or credits. Base USDC top-ups are optional.

Free Tier
Dev / Testing / Basic Agents
$0Forever Free
  • ✓Tier 1 Cloudflare Native
  • ✓Tier 2 Self Conversion
  • ✕Tier 3 JS Rendering(Pro)
  • ✕Advanced Extraction (+15~30%)(Pro)
  • ✕Summary mode (mode=summary)(Pro)
  • ✓max_tokens (token budget)(Free)
  • ✓Output formats (markdown / json / toml / yaml / json-ld)(All Free)
  • ✕OpenAPI / Swagger Spec Compression(307 Redirect (Raw))
  • ✓Rate Limit(15 RPM / 1,000 RPD)
  • ✓Cache API TTL(1 Hour)
  • ✓Signups / Logins / Keys(Zero-Friction)
Get Started Free
✨ AI Agent Recommended
Pro Agent
Autonomous AI Agents / Devs
$20USDC Deposit (12,000 reqs)
  • ✓Tier 1 Cloudflare Native
  • ✓Tier 2 Advanced Extraction
  • ✓Tier 3 JS Rendering (Dynamic Web)
  • ✓Advanced Extraction (+15~30%)
  • ✓OpenAPI / Swagger Spec 90% Compression(openapi/swagger.json)
  • ✓Per-Request Cost($0.00166 (~2.1 KRW))
  • ✓Gas Fee Ratio (0.7 USDC basis)(3.5%)
  • ✓Base (EVM) EIP-191 Auth(Stateless)
  • ✓Signups / API Key Management(Zero-Friction)
Topup API Guide
Enterprise
Scale Agent Services
$100USDC Deposit (80,000 reqs)
  • ✓All Pro Agent Features (JS Rendering, OpenAPI/Swagger 90% Compression, etc.)
  • ✓Lowest Per-Req Cost($0.00125 (~1.6 KRW))
  • ✓Gas Fee Ratio (0.7 USDC basis)(0.7% (Minimal))
  • ✓Saved LLM Token Value(~$5,600 Value)
  • ✓Priority Processing Queue
  • ✓Base (EVM) EIP-191 Auth(Stateless)
View API Reference

⚡ Credit Top-up API (POST /v1/topup)

Submit your Base (EVM) wallet address and deposit transaction hash (tx_hash) to top up credits instantly (chain: base):
# Request
curl -X POST "https://aznp-proxy.kerberos79.workers.dev/v1/topup" \ -H "Content-Type: application/json" \ -d '{"wallet": "0x...BaseEVMAddress", "tx_hash": "0x...BaseTxHash", "chain": "base"}'

🤖 Programmatic Wallet & AI Auto-Payment

Enable your AI Agent to generate Base (EVM) wallets and auto-topup USDC when receiving HTTP 402 Payment Required.

View AI Wallet & Auto-Pay Guide →

Frequently Asked Questions (Wallet FAQ)

What is Base (EVM) Wallet-based Stateless Micropayment?

Instead of creating user accounts or API keys, your Base (EVM) wallet address acts as your account ID. Deposit $20 USDC or more on Base, submit your transaction hash, and authenticate requests using EIP-191 / EIP-712 wallet signatures.

How do I top up credits?

Deposit $20 USDC or more, then call POST /v1/topup with your wallet address and transaction hash.

How do I construct the authentication signature header?

Include the wallet headers in your GET request: x-wallet-address, x-timestamp (Unix timestamp), x-chain (base), and x-signature (EIP-191 signature of 'x402:base:{timestamp}' or EIP-712 typed data).

Do I really not need an API key or account?

Yes! There are no stored passwords or API keys to leak. Your agent's private key signs requests dynamically on demand.