OpenClaw

simmer-x402

Make x402 payments to access paid APIs and gated content. Use when a skill needs to fetch data from x402-gated endpoints (like Kaito mindshare API, Simmer premium endpoints, or any x402 provider). Handles 402 Payment Required responses automatically using USDC on Base.

adlai880 来源安装数☆ 0 仓库 Stars

查看来源 ↗安装与使用 SKILL.md ↗

安装与使用

请根据来源仓库和你的 AI 工具说明安装此技能。先阅读技能文件和依赖要求，再添加到工作流。

SkillHub CLI

skillhub install adlai88/simmer-x402

打开来源仓库，查看说明和兼容环境后，按来源提供的命令或步骤安装。

将来源链接提供给你的 Agent，让它先读取说明、核对依赖，并向你说明将执行的安装步骤。

查看来源 ↗使用指南

技能说明

x402 Payments

Pay for x402-gated APIs using USDC on Base. This skill enables agents to autonomously make crypto payments when accessing paid web resources.

When to Use This Skill

Use this skill when:

A skill or agent needs to fetch data from an x402-gated API (e.g., Kaito mindshare)
You encounter HTTP 402 Payment Required responses
You need to check your Base wallet balance (USDC + ETH)
You want to pay for Simmer premium endpoints beyond free tier rate limits

Setup

Set your wallet private key
```
export EVM_PRIVATE_KEY=0x...your_private_key...
```
Falls back to WALLET_PRIVATE_KEY if EVM_PRIVATE_KEY is not set (same key Simmer/Polymarket users already have). Your EVM address works on all chains — Polygon for trading, Base for x402 payments.
Fund with USDC on Base
- Send USDC to your wallet address on Base network
- x402 payments on Base are fully gasless — you only need USDC, no ETH
Install dependencies
```
pip install x402[httpx,evm]
```

Quick Commands

Command	Description
`python x402_cli.py balance`	Check USDC and ETH balances on Base
`python x402_cli.py fetch <url>`	Fetch URL with automatic x402 payment
`python x402_cli.py fetch <url> --json`	Same but output raw JSON only
`python x402_cli.py fetch <url> --dry-run`	Show payment info without paying
`python x402_cli.py fetch <url> --max 5.00`	Override max payment limit
`python x402_cli.py rpc <network> <method> [params...]`	Make RPC call via Quicknode x402

Examples

Check balance

python x402_cli.py balance

x402 Wallet Balance
==============================
Address: 0x1234...5678
Network: Base Mainnet

USDC:  $42.50
ETH:   0.000000 ETH

Fetch free endpoint (no payment needed)

python x402_cli.py fetch "https://api.kaito.ai/api/v1/tokens" --json

Fetch Kaito mindshare data ($0.02/data point via x402)

python x402...

来源信息

Source: github
Repository: openclaw/skills
Path: skills/adlai88/simmer-x402
Version: —
Commit: 11d58af784dd2948c9f38d9c8f869c107512a1c1
分类来源: rules
状态: active
可见性: public

这些信息来自收录时的来源分析，可能滞后；使用前请核对最新来源文件。

来源内容

SKILL.md

# x402 Payments

Pay for x402-gated APIs using USDC on Base. This skill enables agents to autonomously make crypto payments when accessing paid web resources.

## When to Use This Skill

Use this skill when:
- A skill or agent needs to fetch data from an x402-gated API (e.g., Kaito mindshare)
- You encounter HTTP 402 Payment Required responses
- You need to check your Base wallet balance (USDC + ETH)
- You want to pay for Simmer premium endpoints beyond free tier rate limits

## Setup

1. **Set your wallet private key**
   ```bash
   export EVM_PRIVATE_KEY=0x...your_private_key...
   ```
   Falls back to `WALLET_PRIVATE_KEY` if `EVM_PRIVATE_KEY` is not set (same key Simmer/Polymarket users already have). Your EVM address works on all chains — Polygon for trading, Base for x402 payments.

2. **Fund with USDC on Base**
   - Send USDC to your wallet address on Base network
   - x402 payments on Base are fully gasless — you only need USDC, no ETH

3. **Install dependencies**
   ```bash
   pip install x402[httpx,evm]
   ```

## Quick Commands

| Command | Description |
|---------|-------------|
| `python x402_cli.py balance` | Check USDC and ETH balances on Base |
| `python x402_cli.py fetch <url>` | Fetch URL with automatic x402 payment |
| `python x402_cli.py fetch <url> --json` | Same but output raw JSON only |
| `python x402_cli.py fetch <url> --dry-run` | Show payment info without paying |
| `python x402_cli.py fetch <url> --max 5.00` | Override max payment limit |
| `python x402_cli.py rpc <network> <method> [params...]` | Make RPC call via Quicknode x402 |

## Examples

### Check balance
```bash
python x402_cli.py balance
```
```
x402 Wallet Balance
==============================
Address: 0x1234...5678
Network: Base Mainnet

USDC:  $42.50
ETH:   0.000000 ETH
```

### Fetch free endpoint (no payment needed)
```bash
python x402_cli.py fetch "https://api.kaito.ai/api/v1/tokens" --json
```

### Fetch Kaito mindshare data ($0.02/data point via x402)
```bash
python x402...

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