B20 Check for ChatGPT

com.b20check/b20check

Verify B20 tokens on Base: issuer powers, imposter detection, signed EIP-712 verdicts.

client:ChatGPT transport:streamable-http runtime:npm tools:2

Install B20 Check in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://b20check.com/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs