BillionVerify for ChatGPT

io.github.billionverify/billionverify-mcp

Email verification for AI agents: verify single or bulk emails, check credits and history.

client:ChatGPT transport:streamable-http runtime:npm tools:11

Install BillionVerify in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://mcp.billionverify.com/mcp

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