# Check whether an email address will accept mail before you send

Most email verification tools mean one more account and one more credit pack. contact.verify routes the check across several verification providers from one key: give it an address, get back valid, invalid or unknown, the catch-all flag when known and the mail provider. If one provider cannot decide, the next one is tried.

HTML page: https://www.routergrowth.com/tools/email-finder/verification-tools
Part of: [Email finder tools](https://www.routergrowth.com/tools/email-finder.md)

## The call

[`contact.verify`](https://www.routergrowth.com/catalog/contact.verify): Verify deliverability of a professional email: valid, invalid, or unknown, with catch-all and mail-server details.

Price on this network: $0.002 per verdict. The exact quote is shown before every run.

## What a real run returned

Run on 2026-10-16: 1 records in 8.0 s for $0.00875. Personal fields are masked. One address checked: the first provider could not decide, the second confirmed it as verified in the same run.

| email | status | provider_status | mail_provider |
|---|---|---|---|
| u***@***.com | valid | verified | Other |

## How to do it

1. **Connect RouterGrowth once.** Add the MCP server to Claude, ChatGPT, Claude Code, Codex or Cursor, or call the REST API with your RouterGrowth key.
2. **Pass the address.** contact.verify takes one email. The agent can read it from a CRM export, a sheet or a reply.
3. **Read the verdict.** valid, invalid or unknown, with the provider's own status, catch-all when known and the mail server.
4. **Act on it.** Keep valid, drop invalid, and decide on unknown and catch-all by how much the contact matters.

## Ask it like this

- Verify this address before I send the proposal and tell me if the domain accepts all mail. (`contact.verify`)
- Find this person's work email and verify it with a second provider. (`contact.find`, `contact.verify`)

## Connect

MCP server: `https://api.routergrowth.com/mcp`

```bash
claude mcp add --transport http routergrowth https://api.routergrowth.com/mcp
```

```bash
npm install -g routergrowth && routergrowth setup
routergrowth run -c contact.verify -i '{"email": "a.rivera@example.com"}'
```

```bash
curl -X POST https://api.routergrowth.com/v1/run \
  -H "Authorization: Bearer $ROUTERGROWTH_API_KEY" \
  -d '{"capability": "contact.verify", "input": {"email": "a.rivera@example.com"}}'
```

## Worth knowing

- **Several tools, one bill.** The router tries verification providers cheapest first and stops at the first clear verdict, all on one RouterGrowth balance.
- **Catch-all is not valid.** A catch-all domain accepts every address, so a mailbox can still bounce later. The flag is returned when the provider knows it.
- **No email is sent.** Verification checks the mail server. It does not send a message to the address.

## Questions

### Which verification providers are behind it?

The providers are listed with their live status on this page. The router picks among the ones that are live.

### Am I charged for unknown results?

The call bills per verdict returned. A run where no provider returns a result is not charged.

### Can it verify personal addresses like Gmail?

It checks any address you pass, but large free mail providers often answer unknown because they do not confirm mailboxes.

### Is this better than one tool's dashboard?

It is different: there is no dashboard to upload to. Your agent verifies the address inside the job it is already doing.

## Related

- [Find where to reach a brand from its YouTube channel](https://www.routergrowth.com/tools/email-finder/youtube.md)
- [Read a TikTok brand account's bio, links and contact email](https://www.routergrowth.com/tools/email-finder/tiktok.md)
- [Find the contact details a brand lists on its social profiles](https://www.routergrowth.com/tools/email-finder/social-media.md)
- [Turn the LinkedIn profile you are reading into a verified work email](https://www.routergrowth.com/tools/email-finder/linkedin.md)
- [Get the email and links an Instagram brand account shows](https://www.routergrowth.com/tools/email-finder/instagram.md)
- [Get work emails for the people you want at one company](https://www.routergrowth.com/tools/email-finder/company.md)
- [Find someone's work email from their name and where they work](https://www.routergrowth.com/tools/email-finder/by-name.md)
- [Verify one email address in the middle of a conversation](https://www.routergrowth.com/tools/email-finder/address-verification.md)
- [Verify a whole list of emails without uploading it anywhere](https://www.routergrowth.com/tools/email-finder/bulk-verification-software.md)
- [Verify emails from your own code with one POST request](https://www.routergrowth.com/tools/email-finder/verification-api.md)