Rakuten Viber

Rakuten Viber is a messaging and calling app. Its developer hub publishes the Viber REST Bot API (chatapi.viber.com/pa) for building bots that send and receive messages, with webhook callbacks and official Node.js and Python SDKs.

Rakuten Viber is listed with 4 APIs on the APIs.io network, including Account API, Messages API, Users API, and 1 more. Tagged areas include Company, Messaging, Chatbots, and Communications.

The Rakuten Viber catalog on APIs.io includes 1 Spectral governance ruleset.

Rakuten Viber’s developer surface includes documentation, support, and 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

18.7/100 emerging ▬ flat Agent 17/100 agent aware Heartbeat 0/100 dormant Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

4 APIs

Company Messaging Chatbots Communications

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 18.7/100 · emerging

Contract Quality 2.3 / 19

Developer Ergonomics 4.3 / 15

Access Clarity 0.8 / 15

Operational Transparency 0.8 / 10

Contract Governance 1.6 / 9

Discoverability 4.7 / 8

Regulatory Posture 2.8 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 17/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the AI & Biometrics regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

11 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 12.2 — up to +22.0 composite points
Access Clarity scores 5.3 — up to +18.9 composite points
Developer Ergonomics scores 28.6 — up to +14.3 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/viber/apis.yml: open an issue on github.com/api-evangelist/viber to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 4

Individual APIs this provider publishes, each with its own machine-readable definition.

Rakuten Viber Account API

The Account API from Rakuten Viber — 1 operation(s) for account.

Rakuten Viber Messages API

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

Rakuten Viber Users API

The Users API from Rakuten Viber — 2 operation(s) for users.

Rakuten Viber Webhooks API

The Webhooks API from Rakuten Viber — 1 operation(s) for webhooks.

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Rakuten Viber API Rules

12 rules · 10 errors 1 warnings 1 info

SPECTRAL

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Viber Domain Security

TLSv1.3 · DMARC

SECURITY

Viber Vulnerability Disclosure

no policy recorded

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

Conformance

Conformance

Build 3

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

Security

Security

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 1

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: viber
name: Rakuten Viber
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
image: https://www.viber.com/app/uploads/social-sharing-image-2026.png
description: Rakuten Viber is a messaging and calling app. Its developer hub publishes the Viber REST Bot API (chatapi.viber.com/pa)
  for building bots that send and receive messages, with webhook callbacks and official Node.js and Python SDKs.
url: https://raw.githubusercontent.com/api-evangelist/viber/refs/heads/main/apis.yml
x-type: company
x-source: harvest:market-gap
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-13 (local-v5; was harvest)
specificationVersion: '0.20'
created: '2026-10-13'
modified: '2026-10-13'
tags:
- Company
- Messaging
- Chatbots
- Communications
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/viber-rules.yml
- type: Conformance
  url: conformance/viber-conformance.yml
- type: Hosts
  url: hosts/viber-hosts.yml
- type: Vendors
  url: vendors/viber-vendors.yml
- type: SDKs
  url: packages/viber-packages.yml
- type: Packages
  url: packages/viber-packages.yml
- type: TermsOfService
  url: https://www.viber.com/en/terms
- type: Security
  url: https://www.viber.com/security/
- type: GitHubOrganization
  url: https://github.com/Viber
- type: Website
  url: https://www.viber.com
- type: DeveloperPortal
  url: https://developers.viber.com/
- type: Documentation
  url: https://developers.viber.com/docs/
- type: Support
  url: https://help.viber.com/hc/en-us
- type: VulnerabilityDisclosure
  url: security/viber-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/viber-domain-security.yml
apis:
- aid: viber:viber-account-api
  name: Rakuten Viber Account API
  description: The Account API from Rakuten Viber — 1 operation(s) for account.
  humanURL: https://developers.viber.com/docs/api/rest-bot-api/
  baseURL: https://chatapi.viber.com/pa
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/viber-account-api-openapi.yml
  - type: Documentation
    url: https://developers.viber.com/docs/api/rest-bot-api/
  - type: SDK
    url: https://developers.viber.com/docs/api/nodejs-bot-api/
  - type: SDK
    url: https://developers.viber.com/docs/api/python-bot-api/
- aid: viber:viber-messages-api
  name: Rakuten Viber Messages API
  description: The Messages API from Rakuten Viber — 2 operation(s) for messages.
  humanURL: https://developers.viber.com/docs/api/rest-bot-api/
  baseURL: https://chatapi.viber.com/pa
  tags:
  - Message
  tags_raw:
  - Messages
  properties:
  - type: OpenAPI
    url: openapi/viber-messages-api-openapi.yml
  - type: Documentation
    url: https://developers.viber.com/docs/api/rest-bot-api/
  - type: SDK
    url: https://developers.viber.com/docs/api/nodejs-bot-api/
  - type: SDK
    url: https://developers.viber.com/docs/api/python-bot-api/
- aid: viber:viber-users-api
  name: Rakuten Viber Users API
  description: The Users API from Rakuten Viber — 2 operation(s) for users.
  humanURL: https://developers.viber.com/docs/api/rest-bot-api/
  baseURL: https://chatapi.viber.com/pa
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/viber-users-api-openapi.yml
  - type: Documentation
    url: https://developers.viber.com/docs/api/rest-bot-api/
  - type: SDK
    url: https://developers.viber.com/docs/api/nodejs-bot-api/
  - type: SDK
    url: https://developers.viber.com/docs/api/python-bot-api/
- aid: viber:viber-webhooks-api
  name: Rakuten Viber Webhooks API
  description: The Webhooks API from Rakuten Viber — 1 operation(s) for webhooks.
  humanURL: https://developers.viber.com/docs/api/rest-bot-api/
  baseURL: https://chatapi.viber.com/pa
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/viber-webhooks-api-openapi.yml
  - type: Documentation
    url: https://developers.viber.com/docs/api/rest-bot-api/
  - type: SDK
    url: https://developers.viber.com/docs/api/nodejs-bot-api/
  - type: SDK
    url: https://developers.viber.com/docs/api/python-bot-api/
x-enrichment:
  date: '2026-10-13'
  status: enriched
  artifacts_added: 13
  pass: local-v5

Rakuten Viber API — frequently asked questions

Does Rakuten Viber have an API?

Yes. APIs.io lists 4 APIs from Rakuten Viber, including Rakuten Viber Account API, Rakuten Viber Messages API and Rakuten Viber Users API, and 1 more.

Is there an OpenAPI specification for the Rakuten Viber API?

Yes. APIs.io indexes 4 OpenAPI specifications for Rakuten Viber, each linked for download from this page.

How do I authenticate with the Rakuten Viber API?

Rakuten Viber uses bearer-token authentication.

Is the Rakuten Viber API ready for AI agents?

Rakuten Viber has a Kin Score of 18.7 out of 100 (emerging) and an Agent Readiness score of 17.3 (agent-aware), scored by API Evangelist on 2026-11-06.

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