Summary
Before your agent approves a token or interacts with an unfamiliar contract, you need to know if it's a proxy, an EIP-7702 delegated EOA, or flagged for unlimited allowances. This server exposes two tools: check_contract() runs risk analysis on any address (contract vs EOA, upgrade patterns, ERC20 metadata) and check_approval() audits existing token allowances for the unlimited approval vector that drives most drains. It works over public JSON-RPC on Base and Ethereum with zero dependencies or signing. If you're building agents that touch DeFi, this is the pre-interaction sanity check you bolt on first. Also available as a pay-per-call x402 HTTP endpoint at $0.005 USDC.
Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →
On Capafy, your Skill runs online 24/7 as an agent product, and you get paid every time someone uses it.
Start earning →
An agent that runs the SEO playbooks that move rankings and ships PRs you control.
Get founding access →
Connect Claude to +800M contacts, +150M companies. Find & Enrich leads in chat.
Try For Free →Featured
Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →On Capafy, your Skill runs online 24/7 as an agent product, and you get paid every time someone uses it.
Start earning →An agent that runs the SEO playbooks that move rankings and ships PRs you control.
Get founding access →Connect Claude to +800M contacts, +150M companies. Find & Enrich leads in chat.
Try For Free →Registryactive
Packageghcr.io/eltociear/contract-guard-mcp:mcp-1.1.0
TransportSTDIO
UpdatedJun 8, 2026
