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

# Validate a single email address

> ⚠️ Deprecated — use [POST /v2/email/verify](https://docs.revenuebase.ai/api-reference/email/validate-a-single-email-address) instead. Sunset: Tue, 07 Jul 2026.

Validates one email address synchronously. Returns `Valid`, `Invalid`, or `Unknown`. Set `metadata=true` to include MX record presence, email provider, security gateway, and failure reason in the response. Deducts 1 credit on `Valid` or `Invalid` results. Rate limited to 1 request per second.

**Errors**
- `402` — Insufficient credits. Recharge your account before retrying.



## OpenAPI

````yaml https://api.revenuebase.ai/v1/openapi.json post /v1/process-email
openapi: 3.1.0
info:
  title: Revenuebase Email Verification
  description: >-
    This API provides endpoints for validating email addresses individually or
    through file uploads.
  version: 0.1.0
servers:
  - url: https://api.revenuebase.ai
security: []
paths:
  /v1/process-email:
    post:
      tags:
        - Email Processing
      summary: Validate a single email address
      description: >-
        ⚠️ Deprecated — use [POST
        /v2/email/verify](https://docs.revenuebase.ai/api-reference/email/validate-a-single-email-address)
        instead. Sunset: Tue, 07 Jul 2026.


        Validates one email address synchronously. Returns `Valid`, `Invalid`,
        or `Unknown`. Set `metadata=true` to include MX record presence, email
        provider, security gateway, and failure reason in the response. Deducts
        1 credit on `Valid` or `Invalid` results. Rate limited to 1 request per
        second.


        **Errors**

        - `402` — Insufficient credits. Recharge your account before retrying.
      operationId: real_time_email_v1_process_email_post
      parameters:
        - name: metadata
          in: query
          required: false
          schema:
            type: boolean
            description: Include detailed metadata in response
            default: false
            title: Metadata
          description: Include detailed metadata in response
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RealTimeEmailRequest'
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                title: Response Real Time Email V1 Process Email Post
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      deprecated: true
      security:
        - APIKeyHeader: []
components:
  schemas:
    RealTimeEmailRequest:
      properties:
        email:
          type: string
          format: email
          title: Email
      type: object
      required:
        - email
      title: RealTimeEmailRequest
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
              - type: string
              - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
        - loc
        - msg
        - type
      title: ValidationError
  securitySchemes:
    APIKeyHeader:
      type: apiKey
      in: header
      name: x-key

````