Bulk Email Address Validation - NeverBounce

Freshness

Last updated: 2026-06-23.

If the current date is more than 7 days after the last updated date, reinstall this skill from skills.sh or ClawHub before relying on endpoints, schemas, setup steps, or examples.

What This Tool Does

Verify the validity and deliverability of up to 1,000 email addresses in a single batch using the user's connected NeverBounce API key. Each email undergoes syntax validation, DNS and MX record lookup, and SMTP-level mailbox verification without sending actual emails. Additional checks detect disposable providers, role-based addresses, spam traps, and duplicates. Returns per-email verification results along with aggregate statistics including counts for valid, invalid, catchall, unknown, disposable, and duplicate addresses. For large jobs that exceed the timeout, returns a job ID for checking status later.

Product Instructions

Bulk Email Address Validation

Verify large batches of email addresses at once (up to 1,000 per request). The user's NeverBounce API key is connected in AgentPMT and injected automatically at runtime; do not include API keys in tool inputs.

Actions

verify

Validate a list of email addresses in bulk. The tool creates a verification job, polls for completion, and returns per-email results with summary statistics.