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OpenAPI Specification

openapi: 3.2.0
info:
  title: IntoDNS.AI System API
  description: Public DNS security and email deliverability analysis API. Analyze SPF, DKIM, DMARC, DNSSEC, MTA-STS, BIMI, SMTP STARTTLS, FCrDNS, blacklists, and more with deterministic results and optional AI explanations.
  version: 2.0.0
  contact:
    name: IntoDNS.AI Support
    url: https://intodns.ai
    email: support@cobytes.com
  license:
    name: Proprietary
    url: https://intodns.ai/terms
servers:
- url: https://intodns.ai/api
  description: Production server
security: []
tags:
- name: System
paths:
  /health:
    get:
      tags:
      - System
      summary: Health check
      description: Check API health status.
      operationId: healthCheck
      responses:
        '200':
          description: Service is healthy
          content:
            application/json:
              schema:
                type: object
                properties:
                  status:
                    type: string
                    example: ok
                  timestamp:
                    type: string
                    format: date-time
components:
  securitySchemes:
    SessionCookie:
      type: apiKey
      in: cookie
      name: __Secure-authjs.session-token
      description: Auth.js JWT session established by signing in at https://intodns.ai/login. On HTTPS the cookie is HttpOnly, Secure, SameSite=Lax, Path=/. Local HTTP development uses authjs.session-token without Secure. Auth.js manages cookies and numbered chunks when needed. This is browser session authentication, not an API key or bearer token; do not construct tokens or share session cookies with AI assistants. OpenAPI 3 represents cookie authentication with type apiKey.
x-access:
  authentication: None for public diagnostics; POST /ai/explain and POST /ai/fix require a signed-in free account using an Auth.js session cookie.
  publicEndpoints: Public DNS, email, blacklist, quick-scan, Everything Report, report snapshot, and record generator endpoints are free and available without signup or API keys for normal diagnostic use. Generous abuse protection may return HTTP 429 with Retry-After for bursts and write-style snapshot creation.
  canonicalApiOrigin: https://intodns.ai/api
  invalidApiOrigins:
  - https://api.intodns.io
  - https://intodns.io/api-docs/v1
  invalidApiExamples:
  - https://api.intodns.io/v1/domain/{domain}
  - https://api.intodns.io/v1/domain/example.com
  llmDiscovery: 'LLM discovery files are static and cacheable: /llms.txt, /llms-full.txt, /llms.json, /llm/api.md.'
  protection: Costly write-style or AI/raw-message endpoints may return HTTP 429 with Retry-After if abuse protection triggers.