Integration · Email
Connect Claude & ChatGPT to Emailvalidation
Ask your AI whether an email address can receive mail before you add it to a list or send a quote. With emailvalidation.io it checks the format, the MX records and the SMTP server, and tells you if the address uses a disposable or free email provider. It can also test whether the domain accepts mail for all addresses (catch-all).
Free plan, no credit card. Takes about a minute.
Try asking
“Is [email protected] a valid address?”
The AI checks the address and tells you whether it is valid and deliverable, with the format, MX and SMTP results.
“Is the email on this signup from a disposable email service?”
It validates the address and reads whether the provider is disposable.
“Check these five leads before I import them.”
It checks each address in turn and lists which look deliverable and which do not.
What your AI can do
Deliverability check
Check the format, MX records and SMTP server to see whether an address is valid and can receive mail.
Disposable and free providers
See whether an address uses a disposable email service or a free mailbox provider.
Catch-all domains
Optionally test whether the domain accepts mail for every address, so you know how much a positive result tells you.
“Is this a company address or a free mailbox?”
It validates the address and reads whether it belongs to a free email provider.
“Does nordicfoods.dk accept mail for any address?”
It runs the check with the catch-all test switched on and reports whether the domain accepts all addresses.
“Before I send this quote, check that [email protected] can receive mail.”
It checks the address's MX records and SMTP server and tells you whether it looks deliverable.
1 tools for Emailvalidation
These tools are switched on when you connect. You can switch any of them off, or require your approval before it runs.
validate_emailCheck whether an email address is valid and deliverable (format, MX records, SMTP check, disposable or free provider). Pass email; set catch_all to 1 to also test whether the domain accepts all addresses.
Set up in three steps
- 1
Pick the app
Create a free PipMCP account and choose Emailvalidation from the app list.
- 2
Paste your key
Paste your emailvalidation.io API key. Sign in to the dashboard at app.emailvalidation.io and copy your API key. If you do not have one, you can register for a free key.
- 3
Add the link to your AI
You get a personal MCP link. Add it to Claude, ChatGPT or Cursor:
- Click your name, then Settings › Connectors › Add custom connector.
- Paste your link as the Remote MCP server URL.
- Switch it on from the + menu in a chat.
Questions
What can the AI do in Emailvalidation?
It can check whether an email address is valid and deliverable. The check covers the format, MX records and SMTP server, and shows whether the address uses a disposable or free provider. On request it also tests whether the domain accepts all addresses.
Does the AI see my Emailvalidation credentials?
No. Your emailvalidation.io API key is encrypted at rest and never shown to the AI. After you save them, they are not shown again, not even to you. The AI only sees the results of the tools it calls.
Can I control what the AI is allowed to do?
Yes. You choose which tools are switched on. The Emailvalidation connection has one tool, which checks an address and does not change anything in your account. Every tool call is logged, so you can see which addresses were checked.
Does it work with ChatGPT?
Yes. In ChatGPT go to Settings › Apps & Connectors › Advanced and turn on Developer mode, then add your PipMCP link. Developer mode needs a paid ChatGPT plan: Plus, Pro, Business or Enterprise. The same link also works in Claude (Settings › Connectors › Add custom connector), Cursor and other MCP clients.
What does it cost?
PipMCP has a free plan with no credit card required. Paid plans bill per completed task. You also need your own emailvalidation.io API key, and you can register for a free one.
What is the catch-all check?
Some domains accept mail for any address, so a normal check cannot tell whether one specific mailbox exists. When you ask for it, the AI also tests whether the domain accepts all addresses, so you can judge the result.
Let your AI work in Emailvalidation today.
Start free. Your key stays encrypted, and you decide what the AI may do.
Connect Emailvalidation freePipMCP is not affiliated with Emailvalidation. Product names are trademarks of their owners.