/agentic-wallet

Making Paid x402 Requests

Use the npx awal@2.12.1 x402 pay command to call paid API endpoints with automatic USDC payment on Base.

If the wallet is not authenticated, see references/auth.md.

Command Syntax

npx awal@2.12.1 x402 pay <url> [-X <method>] [-d <json>] [-q <params>] [-h <json>] [--max-amount <n>] [--json]

Options

USDC Amounts

X402 uses USDC atomic units (6 decimals):

IMPORTANT: Always single-quote amounts that use $ to prevent bash variable expansion (e.g. '$1.00' not $1.00).

Input Validation

Before constructing the command, validate all user-provided values to prevent shell injection:

• url: Must be a valid URL starting with https:// or http://. Reject if it contains spaces, semicolons, pipes, backticks, or shell metacharacters.
• data (-d): Must be valid JSON. Always wrap in single quotes to prevent shell expansion.
• max-amount: Must be a positive integer (^\d+$).

Do not pass unvalidated user input into the command.

Examples

# Make a GET request (auto-pays)
npx awal@2.12.1 x402 pay https://example.com/api/weather

# Make a POST request with body
npx awal@2.12.1 x402 pay https://example.com/api/sentiment -X POST -d '{"text": "I love this product"}'

# Limit max payment to $0.10
npx awal@2.12.1 x402 pay https://example.com/api/data --max-amount 100000

Prerequisites

• Must be authenticated (npx awal@2.12.1 status to check; see references/auth.md)
• Wallet must have sufficient USDC balance (npx awal@2.12.1 balance to check; see references/fund.md to top up)
• If you don't know the endpoint URL, see references/x402-search.md to find services first

Error Handling

• "Not authenticated" - See references/auth.md
• "No X402 payment requirements found" - URL may not be an x402 endpoint; see references/x402-search.md to find valid endpoints
• "Insufficient balance" - See references/fund.md