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MailboxValidator

Validate email address to improve deliverability

EmailAuth: API KeyHTTPS: YesCORS: unknownStatus: alive

Last verified: November 12, 2026

Reliability

100% uptime: the documentation responded in 5 of 5 checks over the last 30 days. Median response time: 248 ms.

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At a glance

# The Single Validation API does validation on a single email address and returns all the validation results in either JSON or XML format. (add your API key; see the docs for where it goes) curl "https://api.mailboxvalidator.com/v1/validation/single"

API reference

From MailboxValidator's OpenAPI specification (version 0.1), spec updated June 21, 2021, via APIs.guru.

The Single Validation API does validation on a single email address and returns all the validation results in either JSON or XML format. Refer to https://www.mailboxvalidator.com for further information.
  • Base URL: https://api.mailboxvalidator.com
  • Endpoints: 1
  • Machine-readable spec: OpenAPI JSON (import into Postman, Insomnia or a code generator)
MethodPathWhat it does
GET/v1/validation/singleThe Single Validation API does validation on a single email address and returns all the validation results in either JSON or XML format.

History

  • November 12, 2026: last health check, responding

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