# ChatGPT Integration: Email Validation

URL: https://email-validation.org/integrations/chatgpt/
Updated: 2026-11-06

> Documentation index: https://email-validation.org/llms.txt

Ask ChatGPT whether an address can receive mail, or have it sort a short list, through our MCP server. ChatGPT connects to it as an app in developer mode and you sign in on our site, so there is no key to paste.

[Read the full setup guide](https://email-validation.org/docs/mcp/#chatgpt) [Create an account](https://email-validation.org/signin/)

- Status: Setup guide
- You sign in, no key to paste

**ChatGPT app** Developer mode

Create app

```text
Name             email-validation.org
MCP server URL   https://api.email-validation.org/mcp
Authentication   OAuth

EU data residency: https://api-eu.email-validation.org/mcp
```

## At a glance.

- **Status**: **Setup guide.** Not listed on a marketplace yet: you set it up yourself in a few steps, below and in the full guide.
- **For**: ChatGPT users on the web who check addresses as they work: before adding a contact, answering a lead or cleaning a short list.
- **You need**: A ChatGPT plan with developer mode (Plus, Pro, Business, Enterprise or Edu, on the web) and an account on our site. In a Business, Enterprise or Edu workspace, an admin has to allow developer mode first.
- **Costs**: 1 credit = 1 validated address, as with any API request. Free: unknown results, API errors, malformed addresses and test addresses on sandbox.email-validation.org.
- **Full guide**: [Read the full setup guide](https://email-validation.org/docs/mcp/#chatgpt)

## Typical uses.

- **Check one address**: Paste an address into the chat and ask if you can send to it. ChatGPT answers with its status, reason and the recommended action.
- **Check a list**: Paste a few addresses and it checks each one. For a longer list it can start a bulk job and report the counts by status, with a sign-in that allows Bulk; the results file is in your dashboard.
- **Read your balance**: Ask how many credits you have left and when the next ones expire. Reading the balance is free.

## Set it up. 4 steps.

The short version of the [full setup guide](https://email-validation.org/docs/mcp/#chatgpt), which stays the reference when a step does not match what you see.

1. **Turn on developer mode**: In ChatGPT, open Settings, Apps, Advanced settings and turn on Developer mode.
2. **Create the app**: Click Create app, enter a name and `https://api.email-validation.org/mcp` as the server URL, and choose OAuth as the authentication.
3. **Sign in and allow it**: ChatGPT sends you to our site: sign in, check the permissions it asks for and allow it.
4. **Turn it on in a chat**: Open the + menu of the message box, choose Developer mode and turn the app on. Then ask it to validate `accepted@sandbox.email-validation.org`.

## Good to know.

- ChatGPT asks you to confirm each check and each bulk job before it runs, because they spend credits.
- A signed-in app has no daily credit cap: it can spend up to your whole balance. Disconnect it at any time under [API keys](https://email-validation.org/app/api-keys/), in Connected apps.
- ChatGPT cannot send a fixed API key to an MCP server, so it always uses the sign-in.
- Try it first with `accepted@sandbox.email-validation.org` and the other [test addresses](https://email-validation.org/docs/test-addresses/): each returns the result its name says and costs nothing.

## Related

- [The full ChatGPT setup guide](https://email-validation.org/docs/mcp/#chatgpt)
- [The MCP server: tools, limits and security](https://email-validation.org/integrations/mcp/)
- [How the sign-in works](https://email-validation.org/docs/mcp/#sign-in)
- [Claude integration](https://email-validation.org/integrations/claude/)
- [All integrations](https://email-validation.org/integrations/)