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pay-for-service

Make a paid API request to an x402 endpoint with automatic USDC payment. Use when you or the user want to call a paid API, make an x402 request, use a paid service, or pay for an API call. Use after finding a service with search-for-service.

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查看安装方法

包含的文件(2)

  • SKILL.md2.9 KB
  • _meta.json281 B

SKILL.md(原文)

安装前可以查看交给 AI 代理的指令内容。

Making Paid x402 Requests

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

Confirm wallet is initialized and authed

npx awal@latest status

If the wallet is not authenticated, refer to the authenticate-wallet skill.

Command Syntax

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

Options

OptionDescription
-X, --method <method>HTTP method (default: GET)
-d, --data <json>Request body as JSON string
-q, --query <params>Query parameters as JSON string
-h, --headers <json>Custom HTTP headers as JSON string
--max-amount <amount>Max payment in USDC atomic units (1000000 = $1.00)
--correlation-id <id>Group related operations
--jsonOutput as JSON

USDC Amounts

X402 uses USDC atomic units (6 decimals):

Atomic UnitsUSD
1000000$1.00
100000$0.10
50000$0.05
10000$0.01

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

Examples

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

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

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

Prerequisites

  • Must be authenticated (npx awal@latest status to check, see authenticate-wallet skill)
  • Wallet must have sufficient USDC balance (npx awal@latest balance to check)
  • If you don't know the endpoint URL, use the search-for-service skill to find services first

Error Handling

  • "Not authenticated" - Run awal auth login <email> first, or see authenticate-wallet skill
  • "No X402 payment requirements found" - URL may not be an x402 endpoint; use search-for-service to find valid endpoints
  • "Insufficient balance" - Fund wallet with USDC; see fund skill

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