disban-io Check API

openapi: 3.2.0
info:
  title: Disban Check API
  version: 1.0.0
  description: 'Email-domain classification API (Free beta). Free plan: 2,000 checks per UTC month. No payment or automatic billing. Check credits are metered per successful domain, including cache hits. Plan changes retain usage.'
servers:
- url: https://disban.io
tags:
- name: Check
paths:
  /api/check:
    post:
      operationId: checkDomain
      parameters:
      - name: realtime
        in: query
        schema:
          type: boolean
        description: false uses stored fresh evidence only; true waits for bounded live routing. Omit to preserve the standard verification flow.
      security:
      - bearerAuth: []
      - sessionCookie: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                input:
                  type: string
                  example: sharklasers.com
              required:
              - input
      responses:
        '200':
          description: Classification; consumes one credit
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Verdict'
        '400':
          description: Request could not be completed
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Request could not be completed
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '403':
          description: Request could not be completed
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '409':
          description: Request could not be completed
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '413':
          description: Request could not be completed
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '415':
          description: Request could not be completed
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '429':
          description: Rate or quota limit; honor Retry-After
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          headers:
            Retry-After:
              schema:
                type: integer
              description: Seconds until retry
        '502':
          description: Request could not be completed
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '503':
          description: Request could not be completed
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      tags:
      - Check
      summary: Check domain
      x-summary-source: derived
components:
  schemas:
    Verdict:
      type: object
      properties:
        domain:
          type: string
        category:
          type: string
          enum:
          - disposable
          - free
          - alias
          - testing
          - parked
          - unknown
        reason:
          type: string
        status:
          type: integer
          const: 200
        email:
          type:
          - string
          - 'null'
          description: Request-only echo; never persisted in history.
        normalized_email:
          type:
          - string
          - 'null'
          description: Domain normalized; local-part case preserved. Null for domain-only requests and history.
        domain_authority:
          type:
          - number
          - 'null'
        domain_age_in_days:
          type:
          - integer
          - 'null'
        mx:
          type:
          - boolean
          - 'null'
          description: Fresh explicit non-null MX present. False for Null MX or confirmed absence; null when unverified. False does not exclude implicit SMTP routing.
        mx_records:
          type:
          - array
          - 'null'
          items:
            type: object
            properties:
              hostname:
                type: string
              priority:
                type:
                - integer
                - 'null'
            required:
            - hostname
            - priority
        mx_providers:
          type:
          - array
          - 'null'
          items:
            type: object
            properties:
              slug:
                type: string
              type:
                type: string
              grade:
                type:
                - string
                - 'null'
            required:
            - slug
            - type
            - grade
        spf:
          type:
          - string
          - 'null'
        dmarc:
          type:
          - string
          - 'null'
        public_domain:
          type:
          - boolean
          - 'null'
        relay_domain:
          type:
          - boolean
          - 'null'
        free_subdomain:
          type:
          - boolean
          - 'null'
        alias:
          type:
          - boolean
          - 'null'
        role_account:
          type:
          - boolean
          - 'null'
        spam:
          type:
          - boolean
          - 'null'
        did_you_mean:
          type:
          - string
          - 'null'
        disposable:
          type:
          - boolean
          - 'null'
          description: Null for unresolved classification; never treat null as clean.
        cached:
          type: boolean
        historical_disposable:
          type: boolean
          description: Records existing list or reviewed seed history, independently of current classification. Can be true for currently confirmed disposable services; it is not a low-confidence flag and is not proof of current operation.
        mail_routing:
          type: object
          properties:
            status:
              type: string
              enum:
              - routable
              - invalid
              - unknown
            reason:
              type: string
            observed_at:
              type: string
              format: date-time
            expires_at:
              type: string
              format: date-time
            review_required:
              type: boolean
          required:
          - status
          - reason
        matched_on:
          type: string
        latency_ms:
          type: number
      required:
      - domain
      - category
      - reason
    Error:
      type: object
      properties:
        error:
          type: string
        code:
          type: string
        retry_after:
          type: integer
      required:
      - error
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: dbn_ API key; check, batch, inbound check webhook and read-only subscription
    sessionCookie:
      type: apiKey
      in: cookie
      name: disban_session