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

# Download the OpenAPI document



## OpenAPI

````yaml /openapi.json get /openapi.json
openapi: 3.1.0
info:
  title: GreenTick Developer API
  version: 1.0.0
  summary: WhatsApp messaging, contacts, workflows, and webhooks
  description: >-
    Use GreenTick's REST API to send WhatsApp messages, synchronize contacts,
    trigger workflows, and receive signed event webhooks. Each API key belongs
    to one connected phone number.
  contact:
    name: GreenTick Support
    url: https://greentick.ai
servers:
  - url: https://api.greentick.ai/v1
    description: GreenTick API v1
security: []
tags:
  - name: System
    description: Health and API metadata
  - name: Messages
    description: Send WhatsApp messages
  - name: Conversations
    description: List inbox threads and fetch message history
  - name: Templates
    description: Discover approved templates and their variables
  - name: Contacts
    description: Synchronize customer contacts
  - name: Labels
    description: Contact label catalog for the connected phone number
  - name: Attributes
    description: Contact custom attribute definitions for the connected phone number
  - name: Phone numbers
    description: WhatsApp sending line for this phone number
  - name: Automations
    description: List enrollable automations and start one for a contact
  - name: Workflow hooks
    description: Trigger GreenTick automations from external systems
  - name: Webhooks
    description: Subscribe Zapier, Make.com, or your own server to GreenTick events
  - name: API key
    description: Check the Bearer API key and account timezone
  - name: MCP platform
    description: Limits, usage, and shared connector behavior
  - name: Media
    description: Host customer-supplied files
  - name: Workflows
    description: Create, publish, and export automations
  - name: Flows
    description: WhatsApp Flows
  - name: AI bots
    description: AI bots and knowledge
  - name: Broadcasts
    description: Template broadcasts
  - name: Catalogs
    description: Commerce catalogs, products, and orders
  - name: Ads
    description: Click-to-WhatsApp ads and conversions
paths:
  /openapi.json:
    get:
      tags:
        - System
      summary: Download the OpenAPI document
      responses:
        '200':
          description: OpenAPI 3.1 JSON document
      security: []

````

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