Email verifier

Skill hunter-io/claude-plugin/skills/email-verifier

Verifies whether an email address is deliverable by checking DNS and SMTP records. Use when the user wants to check if an email is valid, verify an email address, or assess deliverability before sending.From its SKILL.md

Install

npx -y skills add hunter-io/claude-plugin --skill email-verifier

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

One thing to look at

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SKILL.md

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Email Verifier

Check whether an email address is deliverable before you send to it.

Examples

/hunter:email-verifier [email protected]
"Is [email protected] a valid email?"
"Check if [email protected] is deliverable"
"Verify these emails: [email protected], [email protected], [email protected]"
"Can I send to [email protected]?"

Steps

Parse the input. Extract the email address(es).
Call Email-Verifier for each email.
Present the result with an actionable recommendation:

# Verification: [email protected]

| Check | Result |
|-------|--------|
| **Status** | valid |
| **Score** | 91 |
| **MX Records** | Valid |
| **SMTP Check** | Valid |
| **Accept All** | No |
| **Disposable** | No |

## Recommendation
Safe to send. This email address is deliverable with high confidence.

## Next Actions
1. Find more contacts at stripe.com
2. Enrich this contact with personal details

Interpret the result clearly based on the status field:
- valid (score 80+) -> "Safe to send. This email address is deliverable with high confidence."
- accept_all -> "Proceed with caution. This mail server accepts all addresses, so delivery is not guaranteed even though SMTP checks pass."
- unknown -> "Unable to determine deliverability. The mail server didn't respond clearly -- consider sending a low-priority test first."
- invalid (score below 50) -> "Do not send. This address is likely invalid and will bounce."
- Disposable email (disposable: true) -> Add: "This is a disposable/temporary email address. It may stop working at any time."
- Pending (HTTP 202 response) -> "Verification is still in progress. Try again in a few seconds."
For multiple emails, verify each separately and present a summary:

# Verification Summary

| Email | Status | Score | Recommendation |
|-------|--------|-------|----------------|
| [email protected] | valid | 91 | Safe to send |
| [email protected] | accept_all | 62 | Proceed with caution |
| [email protected] | invalid | 12 | Do not send |

**Results:** 1 valid, 1 accept_all, 1 invalid

Credit Cost

Costs 1 verification credit per email — only charged for valid, invalid, or accept_all results.

Success Criteria

Verification status returned with a clear, actionable recommendation the user can act on immediately.