Pinion Chain Intel -- OpenClaw Skills

On-chain intelligence, transactions, wallet tools and an AI agent on Base, paywalled via x402 USDC micropayments.

Server: https://pinionos.com/skill/ Price: $0.01 USDC per call (x402 on Base) Free catalog: GET /skill/catalog

Skills

#	Skill	Endpoint	Method	Description
1	balance	/balance/:address	GET	ETH and USDC balances for any Base address
2	tx	/tx/:hash	GET	Decoded transaction details for any Base tx hash
3	price	/price/:token	GET	Current USD price for ETH, USDC, WETH, DAI, USDT, CBETH
4	wallet	/wallet/generate	GET	Generate a fresh Ethereum keypair for Base
5	chat	/chat	POST	Chat with the Pinion AI agent (web search enabled)
6	send	/send	POST	Construct an unsigned ETH or USDC transfer on Base
7	trade	/trade	POST	Get an unsigned swap tx via 1inch aggregator on Base
8	fund	/fund/:address	GET	Wallet balances and funding instructions for Base
9	broadcast	/broadcast	POST	Sign and broadcast an unsigned tx on Base

Each skill has its own SKILL.md in skills/<name>/ with full parameters, example requests and responses.

How x402 Works

1. Client calls a paywalled endpoint (e.g. GET /skill/balance/0x...)
2. Server responds with HTTP 402 and payment requirements (amount, token, network, recipient)
3. Client signs a USDC TransferWithAuthorization (EIP-3009) using their wallet
4. Client retries the request with the X-PAYMENT header containing the signed payment
5. Server verifies the payment via the x402 facilitator, returns the data, and settles the USDC transfer

Every call = 1 real USDC transaction on Base.

Install as OpenClaw Plugin

Copy the pinion-openclaw-skill/ directory into your OpenClaw workspace skills/ folder:

cp -r pinion-openclaw-skill ~/.openclaw/workspace/skills/pinion-chain-intel

Or install from the repo:

git clone https://github.com/chu2bard/pinion-os.git
cp -r pinion-os/pinion-openclaw-skill ~/.openclaw/workspace/skills/pinion-chain-intel

OpenClaw loads skills from workspace/skills/ on the next session. The 8 individual SKILL.md files tell the agent what each skill does, how to call it, and what to expect back.

Use with Pinion OS SDK

npm install pinion-os

import { PinionClient } from "pinion-os";

const pinion = new PinionClient({ privateKey: process.env.PINION_PRIVATE_KEY });
const balance = await pinion.skills.balance("0x101C...");
const price = await pinion.skills.price("ETH");
const chat = await pinion.skills.chat("what is x402?");

The SDK handles x402 payment signing automatically.

Run Your Own Server

git clone https://github.com/chu2bard/pinion-os.git
cd pinion-os
npm install
cp .env.example .env
# Set ADDRESS to your wallet
npm run dev

Configuration

• ADDRESS -- Your wallet address to receive USDC payments
• FACILITATOR_URL -- x402 facilitator (default: https://facilitator.payai.network)
• NETWORK -- base for mainnet, base-sepolia for testnet
• PORT -- Server port (default: 4020)

Directory Structure

pinion-openclaw-skill/
  SKILL.md                  -- this file (index)
  openclaw.plugin.json      -- OpenClaw plugin manifest
  skills/
    balance/SKILL.md        -- balance lookup
    tx/SKILL.md             -- transaction details
    price/SKILL.md          -- token price
    wallet/SKILL.md         -- wallet generation
    chat/SKILL.md           -- AI agent chat
    send/SKILL.md           -- send ETH/USDC
    trade/SKILL.md          -- swap tokens via 1inch
    fund/SKILL.md           -- funding instructions
    broadcast/SKILL.md      -- sign and broadcast tx

Tech Stack

• Express.js with x402-express paymentMiddleware (official Coinbase x402 package)
• Base mainnet RPC for on-chain data
• CoinGecko API for token prices
• 1inch aggregator for swaps
• Anthropic Claude for AI agent chat
• TypeScript

License

MIT