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Rakuten Viber Messages API

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

Rakuten Viber Messages API is one of 4 APIs that Rakuten Viber publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Message. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and SDKs.

This API exposes 2 operations across 2 paths. It is described by OpenAPI 3.2.0, at version 2026-10-13.

Requests are made against a single base URL, https://chatapi.viber.com/pa.

2 operations 2 paths 0 schemas 2 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
2026-10-13
Base URL
https://chatapi.viber.com/pa
Authentication
API Key
Resource Areas
1

Authentication & Security 1

Rakuten Viber Messages API declares 1 security scheme for authenticating requests. An API key is passed in the header as X-Viber-Auth-Token (ViberAuthToken). By default, every request must be authenticated.

Paths & Operations 2

Across 2 paths, the API surfaces 2 operations — 2 POST. Each is listed below with its method, path, parameters, and response codes.

Messages 2
POST
/send_message
Send a message to a subscribed user
sendMessage body → 200
POST
/broadcast_message
Broadcast a message to up to 300 subscribed users
broadcastMessage body → 200

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

viber-messages-api-openapi.yml Raw ↑

Other APIs Rakuten Viber publishes across the network.

Rakuten Viber Account API
Rakuten Viber Users API
Rakuten Viber Webhooks API
Where this information came from

This is an independent, third-party profile of Rakuten Viber Messages API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

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