chu2bard 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
- Client calls a paywalled endpoint (e.g.
GET /skill/balance/0x...) - Server responds with HTTP 402 and payment requirements (amount, token, network, recipient)
- Client signs a USDC
TransferWithAuthorization(EIP-3009) using their wallet - Client retries the request with the
X-PAYMENTheader containing the signed payment - 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 paymentsFACILITATOR_URL-- x402 facilitator (default:https://facilitator.payai.network)NETWORK--basefor mainnet,base-sepoliafor testnetPORT-- 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-expresspaymentMiddleware (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