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

# Verify Single Email

> Validate and check the deliverability of a single email address, including catch-all detection, with the Email Verifier API

<Badge color="green">POST</Badge>

```
https://api.enrow.io/email/verify/single
```

Run a single email verification to check its deliverability. Authenticate every request with your [API key](/authentication) in the `x-api-key` header. For batch operations, use the [Verify Bulk Emails](/api-reference/email-verifier/verify-bulk) endpoint.

<Info>
  Enrow performs **determinist verifications** that verify even catch-all emails. This means passing the results through a debouncer afterwards isn't needed.
</Info>

## Request Body

<ParamField body="email" type="string" required>
  The email to verify
</ParamField>

<ParamField body="custom" type="object">
  Custom params that will be returned in the GET response and in the webhook notification.

  <Expandable title="custom object">
    <ParamField body="your_custom_key_name" type="string" default="your_custom_property">
      Custom data of yours
    </ParamField>
  </Expandable>
</ParamField>

<ParamField body="settings" type="object">
  Settings related to this verification.

  <Expandable title="settings properties">
    <ParamField body="webhook" type="string">
      A URL that will be notified through an HTTP POST request once the single verification is finished. See [How Webhooks Work](/how-webhooks-work).
    </ParamField>
  </Expandable>
</ParamField>

## Response

### 200 — Verification initiated

<ResponseField name="message" type="string">
  Confirmation message
</ResponseField>

<ResponseField name="id" type="string">
  Unique identifier for this verification. Use this to retrieve results via the [GET endpoint](/api-reference/email-verifier/get-single-verification).
</ResponseField>

<ResponseField name="credits_used" type="number">
  Number of credits consumed (0.25). See [Credits & billing](/credits-billing) for per-endpoint costs.
</ResponseField>

<ResponseField name="credits" type="object">
  Credit breakdown

  <Expandable title="credits properties">
    <ResponseField name="amount" type="number">
      Credits consumed
    </ResponseField>

    <ResponseField name="source" type="string">
      Credit source: `sub`, `paygo`, or `mixed`
    </ResponseField>

    <ResponseField name="split" type="object">
      Breakdown between subscription and pay-as-you-go credits (`fromSub`, `fromPaygo`)
    </ResponseField>
  </Expandable>
</ResponseField>

### Error Responses

| Code    | Message                                    |
| ------- | ------------------------------------------ |
| **400** | `invalid email format`                     |
| **400** | `invalid JSON input`                       |
| **401** | `No apikey found in the x-api-key headers` |
| **401** | `This apikey is not valid`                 |
| **402** | `Insufficient credits`                     |

<Note>
  On insufficient credits (**402**), the response body is `{ "reason": "...", "success": false }`. See [Error handling](/error-handling) for the full list of status codes and response formats.
</Note>

<RequestExample>
  ```bash cURL theme={null}
  curl --request POST \
    --url https://api.enrow.io/email/verify/single \
    --header 'Content-Type: application/json' \
    --header 'x-api-key: YOUR_API_KEY' \
    --data '{
      "email": "pam.beesly@dundermifflin.com"
    }'
  ```

  ```javascript Node.js theme={null}
  const response = await fetch('https://api.enrow.io/email/verify/single', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'x-api-key': process.env.ENROW_API_KEY
    },
    body: JSON.stringify({
      email: 'pam.beesly@dundermifflin.com'
    })
  });

  const data = await response.json();
  console.log(data.id);
  ```

  ```python Python theme={null}
  import requests
  import os

  url = "https://api.enrow.io/email/verify/single"
  headers = {
      "Content-Type": "application/json",
      "x-api-key": os.getenv("ENROW_API_KEY")
  }
  payload = {
      "email": "pam.beesly@dundermifflin.com"
  }

  response = requests.post(url, json=payload, headers=headers)
  print(response.json())
  ```
</RequestExample>

<ResponseExample>
  ```json Success Response theme={null}
  {
    "message": "Single verification operating",
    "id": "0cf517bc-16e8-45bc-b967-ab9116b3c804",
    "credits_used": 0.25,
    "credits": {
      "amount": 0.25,
      "source": "sub",
      "split": { "fromPaygo": 0, "fromSub": 0.25 }
    }
  }
  ```

  ```json Error Response theme={null}
  {
    "message": "..."
  }
  ```
</ResponseExample>

## Next steps

<CardGroup cols={2}>
  <Card title="Get the result" icon="inbox" href="/api-reference/email-verifier/get-single-verification">
    Retrieve the verification result using the `id`.
  </Card>

  <Card title="Verify emails in bulk" icon="layer-group" href="/api-reference/email-verifier/verify-bulk">
    Verify many email addresses in a single request.
  </Card>

  <Card title="Authentication" icon="key" href="/authentication">
    How to pass your API key in the x-api-key header.
  </Card>

  <Card title="Webhooks" icon="bell" href="/how-webhooks-work">
    Get notified automatically when a verification completes.
  </Card>
</CardGroup>