Bulk Email Verification for agent
Use this email verification tool in your agent to check your list or selected contacts with Glasser’s data sources.
| Verdict | Catch-all | |
|---|---|---|
| alex@example.com | Deliverable | No |
| old@example.org | Undeliverable | No |
| team@example.net | Unknown | Yes |
| jordan@example.org | Deliverable | No |
| riley@example.com | Deliverable | No |
| info@example.net | Unknown | Yes |
| former@example.org | Undeliverable | No |
| casey@example.com | Deliverable | No |
| alex@example.com | Deliverable | No |
| old@example.org | Undeliverable | No |
| team@example.net | Unknown | Yes |
| jordan@example.org | Deliverable | No |
| riley@example.com | Deliverable | No |
| info@example.net | Unknown | Yes |
| former@example.org | Undeliverable | No |
| casey@example.com | Deliverable | No |
How it works
Check these email addresses. Show the original verdict and flag catch-all domains.
Hunter
LeadMagicYour agent finds the data you need through Glasser.
Why choose Glasser Bulk Email Verification?
Check each mailbox.
Keep the verdict.
Your agent checks addresses with Hunter or LeadMagic through Glasser and brings the results into one list. Keep each source’s verdict alongside the catch-all flags or mail-provider details it returns.
Verify the contacts
you actually need.
Describe which rows qualify: contacts ready for outreach, addresses with no previous check, or a specific segment. Your agent selects those addresses from your list before requesting verification.
set up https://glasser.ai/SKILL.md
Verify only the emails in rows marked Ready for outreach in my spreadsheet. Keep every original column and add the provider's verdict.
Start with a small list.
Pay as you verify.
Use $1 in free credit to try your email list. Each source checks one address per call; your agent can estimate the selected list’s cost before running it. Top up when needed, with no Glasser subscription.
$1Free credit for email verificationFrequently asked
questions.
How does bulk email verification work here?
Your agent organizes the list and calls a verification source for each address. The Hunter and LeadMagic endpoints shown here accept one address per call. The combined report is assembled by your agent.
Is free bulk email verification available?
You can configure and copy the prompt for free. Email verification through Glasser uses paid data calls. Ask your agent to check the current price and estimate the cost for your list.
What does catch-all mean?
A catch-all mail server accepts mail for addresses across a domain, which makes confirming one particular mailbox less conclusive. Keep the flag and the provider's verdict together when reviewing the result.
Can I upload a CSV?
Provide the CSV to an AI agent that supports reading files. Ask it to identify the email column and organize the results. This page supplies the prompt and data-source links; the checks run through your agent.
Where do I use this tool?
Use it in your AI agent after connecting Glasser. Local agents use the Skill and CLI; ChatGPT and Claude.ai use the connection flow in their setup guides. Describe your request, provide the inputs, and let your agent check the available sources.
How much will a task cost?
Glasser provides paid data on a pay-as-you-go basis. Ask your agent to check the selected endpoint's current price and estimate the scope before running the task. Charges for empty results or failed calls depend on that endpoint's terms.
Know which emails need a second look.
set up https://glasser.ai/SKILL.md