---
title: "Check an email address"
method: POST
path: "/v1/check/email"
tags: ["Checks"]
---

# Check an email address

`POST /v1/check/email`

## Request

- Base URL: `https://api.kaidn.io`
- URL: `https://api.kaidn.io/v1/check/email`
- Auth: API key in header `x-api-key`

Disposable-domain, MX and address-integrity checks for one address.

## Request body

- object
  - `email` string, required

## Response `200`

Success.

- object: Success.
  - `email` object
    - `fraud_score` number, required
    - `is_disposable` boolean
    - `mx_valid` boolean
    - `catch_all` boolean
    - `looks_gibberish` boolean
    - `has_plus_tag` boolean
    - `canonical` string, nullable
    - `is_aliased` boolean
    - `alias_tricks` string[]
    - `is_malformed` boolean
    - `reject_reason` string, nullable
    - `recent_abuse` boolean
  - `reputation` object
    - `recent_abuse` boolean
    - `network_risk` number
    - `network_operators` integer
    - `honeypot_hits` integer
  - `summary` string

## Other responses

- `400`: The request body or query string failed validation.
- `401`: Missing or invalid API key.
- `429`: Rate limit exceeded. Back off and retry.
- `500`: Unexpected server error.

---

[API](https://skmtc.dev/kaidn/apis/kaidn-api.md) · [All operations](https://skmtc.dev/kaidn/apis/kaidn-api/llms.txt) · [OpenAPI document](https://skmtc.dev/kaidn/apis/kaidn-api/revisions/6f0706942d0e?raw)