> ## Documentation Index
> Fetch the complete documentation index at: https://docs.spinnable.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# NeverBounce

> Real-time email verification to reduce bounces and protect sender reputation

# NeverBounce

**Verify email addresses in real time before sending, so your outreach lands — not bounces.**

***

## What Your Workers Can Do

Workers can pass email addresses to NeverBounce and get back a verification result before using them in outreach or storing them in your CRM. This keeps your sender reputation clean and your lists accurate.

**Popular use cases:**

* Verify a single email address before reaching out
* Clean a batch of leads before an outreach campaign
* Flag undeliverable addresses in an existing contact list
* Enrich lead data with a "valid / invalid / risky" email status

***

## Authentication

**Type:** API Key

Go to **NeverBounce → Dashboard → API Keys**, create a key, and add it to your worker's vault.

***

## Example Workflows

**Verify before sending**

```
"Before we send the proposal to john.smith@acmecorp.com, run it through NeverBounce and confirm the address is valid"
```

**Clean a lead list**

```
"Here's a CSV of 500 leads. Run each email through NeverBounce and return a new CSV with a 'status' column showing valid, invalid, or risky."
```

**Filter a prospecting output**

```
"Take the Apollo leads you just found and verify their email addresses with NeverBounce — only keep the ones marked valid"
```

***

## Related Tools

* [Apollo](/tools/apollo) - Find and enrich prospect contact data
* [Instantly](/tools/instantly) - Run email outreach campaigns
* [Gmail](/tools/gmail-send) - Send emails from your worker