Yunpian

Yunpian (杭州云片网络科技有限公司) provides cloud communication services, offering SMS, voice, and WhatsApp messaging APIs for developers worldwide. Their platform supports domestic and international SMS, super SMS with multimedia, 5G smart messaging, and enterprise solutions like YCloud. They emphasize security with certifications such as ISO27001 and CMMI3, and provide extensive SDKs, documentation, and support for rapid integration.

Yunpian is listed with 1 API on the APIs.io network. Tagged areas include Company, SMS, Cloud Communications, API Platform, and China.

Yunpian’s developer surface includes documentation, engineering blog, pricing, and 8 more developer resources.

🌐 Visit website📡 Profile data on GitHub
12.3/100 emerging Agent 3/100 human only Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →
1 API
CompanySMSCloud CommunicationsAPI PlatformChina

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0
Composite quality — 12.3/100 · emerging
Contract Quality 0.0 / 21
Developer Ergonomics 3.2 / 17
Access Clarity 4.0 / 17
Operational Transparency 0.6 / 11
Contract Governance 0.0 / 10
Discoverability 4.6 / 9
Regulatory Posture 0.8 / 15
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 12 / 12
Machine-Readable Auth 0 / 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
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/.
Show this score on your site. Kin Score badge preview for Yunpian It updates itself when the score changes. Paste this where you link to your API docs: 
<a href="https://apis.io/providers/yunpian/"><img src="https://apis.io/badge/yunpian/card.svg" alt="Yunpian on APIs.io — Kin Score by API Evangelist"></a>
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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
  • Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
  • Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
  • 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)
  • A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
  • Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
12 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
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/yunpian/apis.yml: open an issue on github.com/api-evangelist/yunpian 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 1

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

Yunpian SMS API

SMS, voice and messaging API documented at the developer docs.

Security Posture 1

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

Yunpian Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login
Login

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Build 3

SDKs, sample code, and the tooling you integrate with

SDKs
SDKs
 Packages
Packages
 GitHubOrganization
GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Commercial 1

Pricing, plans, and the legal terms of use

Pricing
Pricing

Company 3

The organization behind the API

Website
Website
 Blog
Blog
 About
About

Other 1

Properties that don't map to a standard resource type

Hosts
Hosts

Source (apis.yml)

apis.yml Raw ↑ 
aid: yunpian
name: Yunpian
description: Yunpian (杭州云片网络科技有限公司) provides cloud communication services, offering SMS, voice, and WhatsApp messaging APIs
  for developers worldwide. Their platform supports domestic and international SMS, super SMS with multimedia, 5G smart messaging,
  and enterprise solutions like YCloud. They emphasize security with certifications such as ISO27001 and CMMI3, and provide
  extensive SDKs, documentation, and support for rapid integration.
url: https://raw.githubusercontent.com/api-evangelist/yunpian/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-27 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-27'
modified: '2026-10-27'
tags:
- Company
- SMS
- Cloud Communications
- API Platform
- China
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Hosts
  url: hosts/yunpian-hosts.yml
- type: SDKs
  url: packages/yunpian-packages.yml
- type: Packages
  url: packages/yunpian-packages.yml
- type: Login
  url: https://www.yunpian.com/solution/login
- type: GitHubOrganization
  url: https://github.com/yunpian
- type: DomainSecurity
  url: security/yunpian-domain-security.yml
- type: Website
  url: https://www.yunpian.com/
- type: Documentation
  url: https://www.yunpian.com/dev-doc
- type: Blog
  url: https://www.yunpian.com/blog
- type: Pricing
  url: https://www.yunpian.com/price
- type: About
  url: https://www.yunpian.com/about
apis:
- name: Yunpian SMS API
  description: SMS, voice and messaging API documented at the developer docs.
  humanURL: https://www.yunpian.com/dev-doc
  baseURL: null
  aid: yunpian:yunpian-sms-api
x-submission-probe: 301 (-> https://www.yunpian.com) 2026-10-25
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Developer documentation at https://www.yunpian.com/dev-doc is a JavaScript‑rendered single‑page app with no machine‑readable
    spec.
  evidence:
  - url: https://www.yunpian.com/dev-doc
    status: 200
  checked: '2026-10-27'
x-enrichment:
  date: '2026-10-27'
  status: enriched
  artifacts_added: 8
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Yunpian API — frequently asked questions

Does Yunpian have an API?

Yes. APIs.io lists 1 API from Yunpian, including Yunpian SMS API.

Is the Yunpian API ready for AI agents?

Yunpian has a Kin Score of 12.3 out of 100 (emerging) and an Agent Readiness score of 3.1 (human-only), scored by API Evangelist on 2026-10-31.

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