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

# Health check

> Answers `OK` as plain text when the service is up. No API key needed.



## OpenAPI

````yaml /api-reference/email-validation.yaml get /healthz
openapi: 3.0.3
info:
  title: validate.al Email Validation API
  description: >-
    Checks whether an email address can receive mail by asking the domain's mail
    server over SMTP (RCPT TO). No email is sent.
  version: '1.0'
servers:
  - url: https://email.validate.al
security:
  - ApiKeyAuth: []
paths:
  /healthz:
    get:
      summary: Health check
      description: Answers `OK` as plain text when the service is up. No API key needed.
      operationId: healthz
      responses:
        '200':
          description: Service is up.
          content:
            text/plain:
              schema:
                type: string
                example: OK
      security: []
components:
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-API-Key
      description: Your validate.al API key, from the portal (Settings → API Key).

````

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