Rakuten Viber

Rakuten Viber Messages API

The Messages API from Rakuten Viber — 2 operation(s) for messages.

Documentation GitHub OpenAPI

Operations 2

POST /send_message Send a message to a subscribed user #

POST /broadcast_message Broadcast a message to up to 300 subscribed users #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this

find_apisBrowse and filter every API in the catalog.
get_api_artifactsOne API's artifacts, grouped by type.
get_openapiThe primary OpenAPI for this API.
find_similar_apisAPIs that look like this one.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This API

curl "https://apis.io/api/v1/apis/viber:viber-messages-api"

All apis

curl "https://apis.io/api/v1/apis?limit=25"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

openapi: 3.2.0
info:
  title: Viber REST Bot Messages API
  description: GENERATED FROM DOCUMENTATION by API Evangelist. Viber publishes no machine-readable contract; every operation below was read from the "Resource URL" blocks of https://developers.viber.com/docs/api/rest-bot-api/ on 2026-10-13. All calls are HTTPS POST with a JSON body and the X-Viber-Auth-Token header. Responses carry status (0 = success) and status_message.
  version: '2026-10-13'
  x-generated-from: documentation
  x-generated-by: api-evangelist (hand-read from docs; generate-contract-from-docs.py found no verbatim METHOD /path pattern)
  x-source: https://developers.viber.com/docs/api/rest-bot-api/
  x-last-validated: '2026-10-13'
servers:
- url: https://chatapi.viber.com/pa
security:
- ViberAuthToken: []
tags:
- name: Messages
paths:
  /send_message:
    post:
      operationId: sendMessage
      summary: Send a message to a subscribed user
      tags:
      - Messages
      description: Maximum total JSON size of the request is 30kb.
      x-source: https://developers.viber.com/docs/api/rest-bot-api/#send-message
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          $ref: '#/components/responses/Status'
  /broadcast_message:
    post:
      operationId: broadcastMessage
      summary: Broadcast a message to up to 300 subscribed users
      tags:
      - Messages
      description: Same parameters as send_message plus broadcast_list (max 300). Rate limit of 500 requests in a 10 seconds window.
      x-source: https://developers.viber.com/docs/api/rest-bot-api/#broadcast-message
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - broadcast_list
              additionalProperties: true
              properties:
                broadcast_list:
                  type: array
                  maxItems: 300
                  items:
                    type: string
      responses:
        '200':
          $ref: '#/components/responses/Status'
components:
  responses:
    Status:
      description: Action result; status 0 for success, otherwise an error code
      content:
        application/json:
          schema:
            type: object
            properties:
              status:
                type: integer
              status_message:
                type: string
            additionalProperties: true
  securitySchemes:
    ViberAuthToken:
      type: apiKey
      in: header
      name: X-Viber-Auth-Token