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🦀 ClawHub

gstable-ai-payment

by @d5c5ceb0

GStable AI Payment Protocol - enables AI Agents to discover, negotiate, and execute cryptocurrency payments on behalf of users

Versionv1.0.0

Downloads787

Stars⭐ 1

#clawhub

View on ClawHub →

TERMINAL

clawhub install gstable-ai-payment

📖 About This Skill

name: gstable-ai-payment description: "GStable AI Payment Protocol - enables AI Agents to discover, negotiate, and execute cryptocurrency payments on behalf of users" metadata: {"openclaw":{"emoji":"💰","homepage":"https://docs.gstable.io/zh-Hans/docs/category/ai-payment-protocol","primaryEnv":"WALLET_PRIVATE_KEY","requires":{"env":["WALLET_PRIVATE_KEY"]},"install":[{"id":"uv-install","kind":"shell","command":"uv sync","label":"Install gstable-ai-payment CLI (uv)"}]},"clawdbot":{"emoji":"💰","homepage":"https://docs.gstable.io/zh-Hans/docs/category/ai-payment-protocol","primaryEnv":"WALLET_PRIVATE_KEY","requires":{"env":["WALLET_PRIVATE_KEY"]},"install":[{"id":"uv-install","kind":"shell","command":"uv sync","label":"Install gstable-ai-payment CLI (uv)"}]}}

GStable AI Payment Skill

An OpenClaw skill that enables AI Agents to discover, negotiate, and execute cryptocurrency payments on behalf of users.

Features

🔗 Retrieve payment link details and supported tokens

📝 Create payment sessions (EIP-712 signatures)

🔍 Query payment session status

💰 Check native and ERC20 balances

💳 Prepare payments and generate on-chain transaction calldata

✅ Check and automatically approve tokens

⚡ Execute on-chain payment transactions

🚀 One-command payment (pay) with automatic approval handling

🔐 Secure EIP-712 signing (private key stored in environment variables)

⛓️ Multi-chain support (Polygon, Ethereum, Arbitrum, Base)

Installation

clawhub install gstable-ai-payment
cd ~/.openclaw/workspace/skills/gstable-ai-payment
uv sync

Configuration

Set environment variables:

# Required: wallet private key used to sign EIP-712 messages and send transactions
export WALLET_PRIVATE_KEY=0x...your_private_key_here...
Optional: GStable API base URL (default: https://aipay.gstable.io/api/v1)
export GSTABLE_API_BASE_URL=https://aipay.gstable.io/api/v1
Optional: default payer email
export DEFAULT_PAYER_EMAIL=user@example.com

⚠️ Security note: Never commit private keys to version control.

Quick Start

1. Get payment link details

# Payment link formats:
- https://pay.gstable.io/link/
- https://aipay.gstable.io/api/v1/payment/link/
Example 1
uv run scripts/gstable-ai-payment.py get_link lnk_BUDBgiGTWejFs8v0FbdpR3iJ83CG1tua
Example 2
uv run scripts/gstable-ai-payment.py get_link lnk_QTAfGfyqAZHGSm9NKLhtjNYu8dNHRpGh

2. Create payment session

uv run scripts/gstable-ai-payment.py create_session lnk_BUDBgiGTWejFs8v0FbdpR3iJ83CG1tua 137 USDC

3. One-command payment (recommended)

uv run scripts/gstable-ai-payment.py pay lnk_BUDBgiGTWejFs8v0FbdpR3iJ83CG1tua 137 USDC user@example.com

All Commands

# Get payment link details
uv run scripts/gstable-ai-payment.py get_link 
Create payment session
uv run scripts/gstable-ai-payment.py create_session    [payer]
uv run scripts/gstable-ai-payment.py create_session lnk_xxx 137 USDC
uv run scripts/gstable-ai-payment.py create_session lnk_xxx 137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359
Get session status
uv run scripts/gstable-ai-payment.py get_session 
Check native/ERC20 balance
uv run scripts/gstable-ai-payment.py balance  [token_address] [wallet]
Prepare payment (generate calldata)
uv run scripts/gstable-ai-payment.py prepare    [email]
Execute on-chain transaction
uv run scripts/gstable-ai-payment.py execute   
Check token allowance
uv run scripts/gstable-ai-payment.py allowance   
Approve token for payment contract
uv run scripts/gstable-ai-payment.py approve    [amount]
One-command payment (full flow, automatic approval)
uv run scripts/gstable-ai-payment.py pay    [email]
Show wallet address
uv run scripts/gstable-ai-payment.py wallet

Supported Chains

| Chain | Chain ID | Tokens | |-------|----------|------| | Polygon | 137 | USDC, USDT | | Ethereum | 1 | USDC, USDT | | Arbitrum | 42161 | USDC | | Base | 8453 | USDC |

Use uv run scripts/gstable-ai-payment.py get_link to see exactly which chains and tokens are supported for a specific payment link.

Usage Examples

Complete payment flow

# Payment link: https://pay.gstable.io/link/lnk_BUDBgiGTWejFs8v0FbdpR3iJ83CG1tua
Option 1: one-command payment (recommended)
uv run scripts/gstable-ai-payment.py pay lnk_BUDBgiGTWejFs8v0FbdpR3iJ83CG1tua 137 USDC user@example.com
Output:
Step 1/5: Getting payment link details...
Step 2/5: Creating payment session...
Step 3/5: Preparing payment...
Step 4/5: Checking token allowance...
Step 5/5: Executing on-chain payment transaction...
✅ Payment completed!
{ "linkId": "lnk_BUDBgiGTWejFs8v0FbdpR3iJ83CG1tua", "sessionId": "sess_xxx", "txHash": "0x..." }
Option 2: run step by step
1) Get payment link details
uv run scripts/gstable-ai-payment.py get_link lnk_BUDBgiGTWejFs8v0FbdpR3iJ83CG1tua
Returns payment link details in JSON format
2) Create payment session
uv run scripts/gstable-ai-payment.py create_session lnk_BUDBgiGTWejFs8v0FbdpR3iJ83CG1tua 137 USDC
Output: { "sessionId": "sess_abc123", ... }
3) Prepare payment
uv run scripts/gstable-ai-payment.py prepare sess_abc123 137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 user@example.com
Output: { "executionChainId": "137", "executorContract": "0x...", "calldata": "0x..." }
4) Check and approve allowance (if needed)
uv run scripts/gstable-ai-payment.py allowance 137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 0x...
uv run scripts/gstable-ai-payment.py approve 137 0x3c499c542cef5e3811e1192ce70d8cc03d5c3359 0x...
5) Execute on-chain transaction
uv run scripts/gstable-ai-payment.py execute 137 0x... 0x...
Output: { "status": "submitted", "txHash": "0x..." }

Agent interaction example

User: "I want to pay this: https://pay.gstable.io/link/lnk_BUDBgiGTWejFs8v0FbdpR3iJ83CG1tua" Agent: [uv run scripts/gstable-ai-payment.py get_link lnk_BUDBgiGTWejFs8v0FbdpR3iJ83CG1tua] "This is a payment link. You can pay with USDC on Polygon. Which network would you like to use?" User: "Use Polygon"

Agent: [uv run scripts/gstable-ai-payment.py pay lnk_BUDBgiGTWejFs8v0FbdpR3iJ83CG1tua 137 USDC] "✅ Payment completed! Transaction hash: 0x..."

Payment Flow

┌─────────────────┐ │ User shares link│ └────────┬────────┘ │ ▼ ┌─────────────────┐ │ get_link │ ──► Get product and payment options └────────┬────────┘ │ ▼ ┌─────────────────┐ │ User picks token│ └────────┬────────┘ │ ▼ ┌─────────────────┐ │ create_session │ ──► Create session (EIP-712 signature) └────────┬────────┘ │ ▼ ┌─────────────────┐ │ prepare │ ──► Get transaction calldata (EIP-712 signature) └────────┬────────┘ │ ▼ ┌─────────────────┐ │ allowance │ ──► Check token allowance └────────┬────────┘ │ ▼ (if insufficient) ┌─────────────────┐ │ approve │ ──► Approve token for payment contract └────────┬────────┘ │ ▼ ┌─────────────────┐ │ execute │ ──► Send on-chain transaction └────────┬────────┘ │ ▼ ┌─────────────────┐ │ ✅ Payment done │ └─────────────────┘

Or use the pay command to complete everything in one step.

Environment Variables

| Variable | Required | Description | |------|------|------| | WALLET_PRIVATE_KEY | ✅ | Wallet private key used to sign EIP-712 messages and execute transactions (0x prefix) | | GSTABLE_API_BASE_URL | ❌ | GStable API base URL (default: https://aipay.gstable.io/api/v1) | | DEFAULT_PAYER_EMAIL | ❌ | Default payer email | | RPC_URL_POLYGON | ❌ | Polygon RPC URL (default: https://polygon-rpc.com) | | RPC_URL_ETHEREUM | ❌ | Ethereum RPC URL (default: https://eth.llamarpc.com) | | RPC_URL_ARBITRUM | ❌ | Arbitrum RPC URL (default: https://arb1.arbitrum.io/rpc) | | RPC_URL_BASE | ❌ | Base RPC URL (default: https://mainnet.base.org) |

Troubleshooting

"WALLET_PRIVATE_KEY not set"

export WALLET_PRIVATE_KEY=0x...

"Token not supported"

# Check supported tokens first
uv run scripts/gstable-ai-payment.py get_link

"Session expired"

# Recreate session
uv run scripts/gstable-ai-payment.py create_session

"No RPC URL configured for chain"

# Set RPC URL for the corresponding chain
export RPC_URL_POLYGON=https://polygon-rpc.com

"Gas estimation failed" or "Transaction failed"

Ensure the wallet has enough native token (e.g., MATIC) to pay gas fees

Ensure the wallet has enough token balance to complete the payment

Check whether the token has been approved for the payment contract

Resources

GStable AI Payment Protocol: https://docs.gstable.io/zh-Hans/docs/category/ai-payment-protocol

GStable AI Agent Integration: https://docs.gstable.io/zh-Hans/docs/category/ai-agent-integration

GitHub: https://github.com/gstable/gstable-ai-payment-skill

License

MIT

💡 Examples