Anchor Browser supports X402 cryptocurrency payments for browser sessions when you have insufficient credits. This allows you to pay for sessions using cryptocurrency wallets.

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How It Works

  1. Attempt Session Creation: Try to create a browser session
  2. Credit Check: System checks if you have sufficient credits
  3. Payment Prompt: If Error 402 is returned, you’re prompted to connect a wallet
  4. Automatic Payment: Payment is processed automatically through your wallet
  5. Session Creation: Session is created immediately after successful payment

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Using X402 Payments via API

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Prerequisites

  1. Install Coinbase Wallet: Currently only Coinbase Wallet is supported
  2. Get Funds: Ensure your wallet has USDC on the Base mainnet network
  3. Set Up WalletConnect: Configure WalletConnect for wallet connection

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API Usage Example

When you make a session creation request without sufficient credits, the system will:
  1. Return a 402 (Payment Required) status
  2. Include payment details in the response
  3. Your client can automatically handle the payment using X402
  4. Retry the request with payment headers
Here’s a Python example using the x402 library: 
import os, json, requests
from eth_account import Account
from x402.clients.requests import x402_requests

ENDPOINT = "https://api.anchorbrowser.io/v1/sessions"
BODY = {}

key = os.getenv("PRIVATE_KEY") or exit("Set PRIVATE_KEY=0x...")
pre = requests.post(ENDPOINT, json=BODY, timeout=30)
if pre.status_code == 200:
    print(json.dumps(pre.json(), indent=2))
    exit()

price = int(pre.json()["accepts"][0]["maxAmountRequired"])

res = x402_requests(Account.from_key(key)).post(ENDPOINT, json=BODY, timeout=60)
print(json.dumps(res.json(), indent=2))

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Pricing

  • Price per Session: $0.50 USDC
  • Network: Base mainnet only
  • Payment Method: USDC via X402 protocol

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