# Token Allowance

> Manage ERC20 token approvals and allowances.

- Skill: `xspoonai/token-allowance` (Agent Skill, multi-file: 4 files)
- Install (CLI): `npx skillmds@latest add xspoonai/token-allowance`
- Raw SKILL.md: https://api.skillmd.com/api/skills/xspoonai/token-allowance/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: XSpoonAi (https://skillmd.com/u/xspoonai)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/xspoonai/token-allowance

---


# Token Allowance Manager

A security-focused skill to manage ERC20 token approvals. It allows agents to check current allowances, approve spenders (like DEX routers), and revoke permissions to secure funds.

## Quick Start

```python
# Check if Uniswap Router has access to my USDC
allowance = await agent.run_tool(
    "manage_allowance",
    action="check",
    token_address="0xA0b8...",
    spender_address="0xE592..."
)

# Approve 100 USDC
await agent.run_tool(
    "manage_allowance",
    action="approve",
    token_address="0xA0b8...",
    spender_address="0xE592...",
    amount=100.0
)
```

## Scripts

| Script | Purpose |
|--------|---------|
| [allowance.py](scripts/allowance.py) | Checks and manages ERC20 allowances |

## Environment Variables

| Variable | Required | Description |
|----------|----------|-------------|
| `WEB3_RPC_URL` | Yes | RPC URL for the blockchain |
| `PRIVATE_KEY` | Yes | Required for 'approve' and 'revoke' actions |

## Best Practices

1. Always check allowance before approving (avoid unnecessary txs).
2. Approve exact amounts rather than infinite (security best practice).
3. Revoke allowances for unused DApps to prevent hacks.