ListBouncer

Connectors

Use ListBouncer in Claude and ChatGPT

Ask Claude or ChatGPT to check an address or clean a list, and it uses ListBouncer to get the answer.

You can check email addresses and clean lists without leaving Claude or ChatGPT. Just ask, and the assistant uses ListBouncer to get the answer. It's the same checks, the same results and the same credits as your dashboard.

What you can ask

  • "Is jane@gmial.com a real address?"
  • "Check these 40 sign-ups from today before I add them to my newsletter." (paste the addresses)
  • "How did my last clean go? Which addresses should I remove?"
  • "How many ListBouncer credits do I have left?"

You'll see whether an address will bounce, why, and the likely fix for a typo.

Add ListBouncer to Claude

You need a ListBouncer account. If you don't have one yet, create one first. New accounts get 100 free credits.

  1. In Claude, open Settings, then Customize, then Connectors.
  2. Click Add, then Add custom connector.
  3. Name it ListBouncer and paste this address:
https://listbouncer.com/mcp
  1. Click Add, then Connect.
  2. Sign in to ListBouncer if asked, and click Allow.

That's it. Start a new chat and ask away.

Add ListBouncer to ChatGPT

  1. In ChatGPT, open Plugins in the sidebar.
  2. Click Add, then Add custom MCP server.
  3. Name it ListBouncer and paste the same address:
https://listbouncer.com/mcp
  1. Leave Authentication on OAuth, tick the box to continue, and click Create as a plugin.
  2. Sign in to ListBouncer if asked, and click Allow.

If you'd like an icon, you can download ours. It fits ChatGPT's size limit.

What the assistant can do with it

Tool What it does Credits
Check one email address Checks a single address and explains the result 1, only when we get a definite answer
Clean a list of email addresses Cleans up to 1,000 addresses pasted into the chat 1 per unique address
Check a clean's progress Shows how far a clean has got and the totals when it's done Free
Get the addresses from a clean Lists the addresses in one group, such as the ones that will bounce Free
Recent cleans Lists your 10 most recent cleans Free
Credit balance Shows how many credits you have left Free

Duplicates, broken rows and Unknown results are free, just like in the dashboard. Cleans you start in Claude or ChatGPT show up in your dashboard, so you can download the full results there too.

For bigger lists, upload the file on Clean a list. There's no 1,000 limit there.

You stay in control

  • Claude and ChatGPT ask before they use ListBouncer. You can allow each use or turn on "always allow".
  • Before cleaning a list, the assistant is asked to tell you how many credits it will use and check with you first.
  • The connection only reaches your own ListBouncer account: your cleans, their results and your balance. It can't buy credits or change your settings.
  • To stop it, disconnect or remove ListBouncer in Claude's connector settings or ChatGPT's Plugins page.

For developers

Using Claude Code, Cursor or another tool that connects to MCP servers? Point it at https://listbouncer.com/mcp and send an API key from your API keys page as a header:

Authorization: Bearer lb_live_…

Prefer to call us from your own code? See the API docs.