Zalo

Zalo is a Vietnamese messaging platform (VNG Corporation). Zalo For Developers documents the Official Account API, the Zalo Notification Service (ZNS) API for template-based transactional messages, the Social API with OAuth v4 user access tokens, and Zalo Mini App.

Zalo is listed with 3 APIs on the APIs.io network. Tagged areas include Company, Messaging, CPaaS, Vietnam, and Notification.

Zalo’s developer surface includes engineering blog, documentation, developer portal, authentication, and 3 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

9.9/100 minimal ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

3 APIs

Company Messaging CPaaS Vietnam Notification

Kin Score

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

Composite quality — 9.9/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 3.6 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 6.1 / 9

Regulatory Posture 1.5 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 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 Telecommunications 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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% 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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
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

12 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Access Clarity scores 0.0 — up to +20.0 composite points
Developer Ergonomics scores 21.4 — up to +15.7 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/zalo/apis.yml: open an issue on github.com/api-evangelist/zalo 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 →

APIs 3

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

Zalo Official Account API

Send and manage messages, followers and content for a Zalo Official Account.

Zalo Notification Service (ZNS) API

Send template-based transactional notification messages to Zalo users by phone number.

Zalo Social API

User login and profile access via OAuth v4 user access tokens.

Security Posture 1

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

Zalo Domain Security

TLSv1.2 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Portal

Portal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: zalo
name: Zalo
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: none
  source:
  - security
  generated: '2026-11-06'
  method: derived
image: https://h5.zdn.vn/static/zalo-site/thumb.jpg
description: Zalo is a Vietnamese messaging platform (VNG Corporation). Zalo For Developers documents the Official Account
  API, the Zalo Notification Service (ZNS) API for template-based transactional messages, the Social API with OAuth v4 user
  access tokens, and Zalo Mini App.
url: https://raw.githubusercontent.com/api-evangelist/zalo/refs/heads/main/apis.yml
x-type: company
x-source: harvest:market-gap
x-tier: profiled
x-tier-reason: harvest
specificationVersion: '0.20'
created: '2026-10-13'
modified: '2026-10-13'
tags:
- Company
- Messaging
- CPaaS
- Vietnam
- Notification
tags_raw:
- Company
- Messaging
- CPaaS
- Vietnam
- Notifications
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Hosts
  url: hosts/zalo-hosts.yml
- type: Blog
  url: https://zalo.me/vi/blog
- type: DomainSecurity
  url: security/zalo-domain-security.yml
- type: Website
  url: https://zalo.me
- type: Documentation
  url: https://developers.zalo.me/docs
- type: Portal
  url: https://developers.zalo.me/
- type: Authentication
  url: https://developers.zalo.me/docs/social-api/tham-khao/user-access-token-v4
apis:
- aid: zalo:official-account-api
  name: Zalo Official Account API
  description: Send and manage messages, followers and content for a Zalo Official Account.
  humanURL: https://developers.zalo.me/docs/official-account/bat-dau/kich-hoat-api
  baseURL: https://openapi.zalo.me
  tags:
  - Messaging
  properties:
  - type: Documentation
    url: https://developers.zalo.me/docs/official-account/bat-dau/kich-hoat-api
- aid: zalo:zns-api
  name: Zalo Notification Service (ZNS) API
  description: Send template-based transactional notification messages to Zalo users by phone number.
  humanURL: https://developers.zalo.me/docs/zalo-notification-service/bat-dau/gioi-thieu-zalo-notification-service-api
  baseURL: https://business.openapi.zalo.me
  tags:
  - Messaging
  properties:
  - type: Documentation
    url: https://developers.zalo.me/docs/zalo-notification-service/bat-dau/gioi-thieu-zalo-notification-service-api
- aid: zalo:social-api
  name: Zalo Social API
  description: User login and profile access via OAuth v4 user access tokens.
  humanURL: https://developers.zalo.me/docs/social-api/tham-khao/user-access-token-v4
  baseURL: https://graph.zalo.me
  tags:
  - Messaging
  properties:
  - type: Documentation
    url: https://developers.zalo.me/docs/social-api/tham-khao/user-access-token-v4
x-coverage:
  state: none
  reason: no-developer-program
  method: derived
  generated: '2026-10-13'
  generator: derive-coverage.py (pre-flight evidence)
  detail: the company publishes no developer documentation host and no machine-readable contract on its own domain
  evidence:
  - url: https://zalo.me
    status: 200
x-enrichment:
  status: enriched
  pass: local-v5
  date: '2026-10-13'

Zalo API — frequently asked questions

Does Zalo have an API?

Yes. APIs.io lists 3 APIs from Zalo, including Zalo Official Account API, Zalo Notification Service (ZNS) API and Zalo Social API.

How do I authenticate with the Zalo API?

Zalo uses bearer-token authentication.

Is the Zalo API ready for AI agents?

Zalo has a Kin Score of 9.9 out of 100 (minimal) and an Agent Readiness score of 2.5 (human-only), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider 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 providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
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.

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