Email Validation — Verify Deliverability, Mailbox & Catch-All ✅

Email Validation — Verify Deliverability, Mailbox & Catch-All ✅ No API Key

Validate any email address and get clear deliverability signals — a valid / invalid result, whether the mailbox actually exists, catch-all detection, the mail provider and a confidence level. Powered by the Neuralverge API. No API key or account required.

Ideal for cleaning lists before a send, cutting bounce rates, protecting sender reputation, and validating signups, leads and CRM records.

✨ Why this Actor

• ✅ Real deliverability verdict — valid / invalid plus a plain-English message such as "Mailbox exists".
• 🪤 Catch-all detection — flags catch-all domains that accept anything, so you can weight the result accordingly.
• 🏷️ Provider & confidence — see which mail provider hosts the address and how confident the check is.
• 🔑 No API key or account — the check runs on the Neuralverge backend.
• ⚡ Real-time & structured — a fresh verdict each run, ready for a spreadsheet, CRM or AI pipeline.

🔧 How it works

1. Provide an email address — e.g. steve@builder.io.
2. Run the Actor. The validation happens on the Neuralverge backend.
3. Get one flat dataset row per address — 6 columns, all at the top level (email, result, message, isCatchAll, provider, confidence, …). Export to CSV, JSON or Excel, or pull it over the Apify API.

Input

One email per run.

Field	Type	Notes
email	string	The email address to validate.

{
  "email": "steve@builder.io"
}

What you'll receive

One flat row per address. Every field sits at the top level of the row, so the Output tab shows a single table with all 6 columns — there are no views to switch between. Exports (CSV, JSON, XML, Excel) contain exactly the same fields.

Columns: email, result, message, isCatchAll, provider, confidence.

Nulls are normal. The column set is the same on every run, so a field the source does not expose for this address comes back null rather than disappearing — a spreadsheet or CRM mapping built on one run keeps working on the next.

Example output (real run)

A real dataset row, shown in full.

{
  "email": "steve@builder.io",
  "result": "valid",
  "message": "Mailbox exists",
  "isCatchAll": false,
  "provider": "GOOGLE",
  "confidence": "medium"
}

When nothing is found

A check that runs but returns no verdict still writes a row, so a batch never silently loses an input:

Column	Value
your query fields	echoed back exactly as submitted
found	false
message	why nothing was returned

Filter these out with found != false (or drop rows where message is set). This row is billed as one result — see Pricing.

Pricing

Pay per event — $0.001 per verdict ($1 per 1,000) written to the dataset. There is no run fee and no start fee.

Event	Price	Charged
Actor start	free	never
Failed run — invalid input, API error, timeout	free	never
Row written to the dataset	$0.001 ($1 / 1,000)	every row, including the "no result" row

A completed check is billed as one verdict, whatever it says. When the source returns nothing, the Actor writes one explicit no-result row — the address you submitted plus found: false and a message explaining it — and that row is charged at the normal per-verdict price. A run that fails (missing input, bad key, upstream error) writes no row and costs $0.00.

Pricing is on top of your Apify platform usage.

Rate limit

There is a ceiling on how fast one Apify account can pull from the Neuralverge backend: 10 requests per second for this Actor, counted separately from the other Neuralverge Actors. One run is normally one request, so this is about how many runs you start at once, not about the size of a single run — at typical run times that is dozens of runs in flight at once, which is well above ordinary use.

Updated August 2026: this ceiling was doubled from 5 to 10 requests per second. Bulk jobs that used to hit 429s now go through.

Above the ceiling the backend answers HTTP 429. The Actor waits out the Retry-After it asks for and retries a few times before giving up; a run that does give up writes no row and is not charged.

If you need a higher rate for a bulk job, get in touch.

Free plan limits

Users on any paid Apify plan are not affected by anything in this section.

On the Apify Free plan this Actor may be started 5 time(s) per calendar month per user. A run that finds nothing still counts, because the lookup is performed either way. Every Neuralverge Actor carries its own allowance — running one never uses up another's. When a limit is reached the Actor stops gracefully with a status message naming it; everything resets on the 1st of every month, and any paid Apify plan removes all of it.

Integrations & API

Results are stored in a standard Apify dataset — export as CSV, JSON, XML or Excel, or fetch on demand through the Apify API. The Actor also plugs into Apify's integrations (Make, Zapier, n8n, webhooks) and can be called from any MCP client.

FAQ

Do I need an account or API key? No. The validation runs on the Neuralverge backend.

What does result mean? valid means the address looks deliverable and the mailbox was resolved; invalid means it was not. Always read it together with isCatchAll and confidence.

What is a catch-all domain? A domain configured to accept mail for any address. On such domains a valid result is less certain, because the server won't reject unknown mailboxes.

Am I charged if nothing is found? Yes — a check that ran is billed as one verdict even when the source returned nothing, and you get a no result row that says so. A run that fails (missing input, API error, timeout) writes no row and is not charged.

Can I validate a whole list? Run one email per run and collect the rows in the dataset, or drive the Actor from Apify's integrations to process a list.

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Disclaimer: This Actor is an independent tool. Use the results in compliance with applicable laws (e.g. GDPR, CAN-SPAM) and only where you have a lawful basis.