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

# Reactions

> Add or remove a reaction to a WhatsApp message

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## OpenAPI

````yaml openapi-send POST /whatsapp/reactions
openapi: 3.0.0
info:
  version: v2026.2.26
  title: Sending API
servers:
  - url: https://api.contiguity.com/send
security: []
paths:
  /whatsapp/reactions:
    post:
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                to:
                  type: string
                  description: Recipient's WhatsApp number. Must be in E.164 format.
                  example: '+1234567890'
                action:
                  type: string
                  enum:
                    - add
                    - remove
                  description: Whether to add or remove a reaction
                  example: add
                reaction:
                  type: string
                  nullable: true
                  description: >-
                    The emoji reaction to send (e.g., '👍', '❤️', or
                    :thumbs_up:, :heart:, :haha: etc.)
                  example: 👍
                message:
                  type: string
                  nullable: true
                  description: >-
                    Provide either a WhatsApp ID, or complete content of the
                    message to react to.
                  example: wa_1234567890
              required:
                - to
                - action
      responses:
        '200':
          description: Add or remove a reaction to a WhatsApp message
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: string
                    example: req_xxxxxxxxxxxxxxxx
                  timestamp:
                    type: number
                    example: 1772129047728
                  api_version:
                    type: string
                    example: v2026.2.26
                  object:
                    type: string
                    example: response
                  data:
                    type: object
                    properties:
                      status:
                        type: string
                        description: Status of the reaction.
                        example: added
                      message:
                        type: string
                        description: Text description of the completed action.
                        example: Reaction added for +1 555 555 5555
                    required:
                      - status
                      - message
                required:
                  - id
                  - timestamp
                  - api_version
                  - object
                  - data
        '400':
          description: Bad Request
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: string
                    example: err_xxxxxxxxxxxxxxxx
                  timestamp:
                    type: number
                    example: 1772129047728
                  api_version:
                    type: string
                    example: v2026.2.26
                  object:
                    type: string
                    example: error
                  data:
                    type: object
                    properties:
                      error:
                        type: string
                        example: Bad Request
                      status:
                        type: number
                        example: 400
                    required:
                      - error
                      - status
                required:
                  - id
                  - timestamp
                  - api_version
                  - object
                  - data
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: string
                    example: err_xxxxxxxxxxxxxxxx
                  timestamp:
                    type: number
                    example: 1772129047728
                  api_version:
                    type: string
                    example: v2026.2.26
                  object:
                    type: string
                    example: error
                  data:
                    type: object
                    properties:
                      error:
                        type: string
                        example: Unauthorized
                      status:
                        type: number
                        example: 401
                    required:
                      - error
                      - status
                required:
                  - id
                  - timestamp
                  - api_version
                  - object
                  - data
        '403':
          description: Forbidden
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: string
                    example: err_xxxxxxxxxxxxxxxx
                  timestamp:
                    type: number
                    example: 1772129047728
                  api_version:
                    type: string
                    example: v2026.2.26
                  object:
                    type: string
                    example: error
                  data:
                    type: object
                    properties:
                      error:
                        type: string
                        example: Forbidden
                      status:
                        type: number
                        example: 403
                    required:
                      - error
                      - status
                required:
                  - id
                  - timestamp
                  - api_version
                  - object
                  - data
        '500':
          description: Internal Server Error
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: string
                    example: err_xxxxxxxxxxxxxxxx
                  timestamp:
                    type: number
                    example: 1772129047728
                  api_version:
                    type: string
                    example: v2026.2.26
                  object:
                    type: string
                    example: error
                  data:
                    type: object
                    properties:
                      error:
                        type: string
                        example: Internal Server Error
                      status:
                        type: number
                        example: 500
                    required:
                      - error
                      - status
                required:
                  - id
                  - timestamp
                  - api_version
                  - object
                  - data
      security:
        - bearerAuth: []
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer

````