Yuno

Yuno is a global payment orchestration platform that lets merchants connect to 1,000+ payment methods, PSPs, anti-fraud, and payout providers through a single API and SDK. Its unified checkout, smart routing, and no-code workflows consolidate a company's payment stack, reduce processing fees, and improve approval rates across markets. Yuno exposes payments, checkout sessions, customers, subscriptions, payouts, disputes, reports, banking connectivity, and a PCI Proxy, plus Web/iOS/Android/React Native/Flutter checkout SDKs, an official MCP server, and an agent toolkit for building agentic payment flows. Yuno is certified to PCI DSS v4.0, SOC 2 Type 2, ISO/IEC 27001, ISO/IEC 27701, GDPR, and is a recognized Visa Service Provider.

Yuno publishes 1 API contract indexed on the APIs.io network: Payments API. Tagged areas include Company, Payments, Payment Orchestration, Fintech, and Checkout.

The Yuno catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Yuno’s developer surface includes documentation, API reference, getting-started guide, signup flow, engineering blog, changelog, authentication, and 29 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

49.7/100 developing ▬ flat Agent 30/100 agent ready Front door AI 5/6 prominent Heartbeat 96/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 1 MCP Servers 2 Agent Skills

Company Payments Payment Orchestration Fintech Checkout Payouts Subscription

Kin Score

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

Composite quality — 49.7/100 · developing

Contract Quality 8.3 / 21

Developer Ergonomics 11.6 / 17

Access Clarity 6.3 / 17

Operational Transparency 5.8 / 11

Contract Governance 1.9 / 10

Discoverability 6.1 / 9

Regulatory Posture 5.6 / 15

Agent readiness — 30/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 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 Payments 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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

6 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 39.0 — up to +15.3 composite points
Access Clarity scores 36.8 — up to +12.6 composite points
Contract Governance scores 18.2 — up to +9.8 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/yuno/apis.yml: open an issue on github.com/api-evangelist/yuno 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Stripe App Marketplace and Partner Ecosystem (builders on Stripe)	standard	46.4	-	-
Official SDKs on Packagist, pub.dev and Hex	standard	46.4	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 2

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OpenAPI

measured — observed by APIs.io (published)

APIs 1

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

Yuno Payments API

Core Yuno Payments API — customers, checkout sessions, payments, refunds, captures, subscriptions, payouts, disputes, reports, banking connectivity and PCI Proxy. Header API-key...

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Yuno MCP Server

Local (stdio) MCP server; 6 tools listed.

MCP SERVER

Agent Skills 2

Packaged agent skills for driving this provider's APIs from an AI assistant.

Accept a payment with Yuno

AGENT SKILL

Retrieve and reconcile a payment

AGENT SKILL

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Yuno Webhooks

ASYNCAPI

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Yuno Openapi Overlay

2 actions · update · yuno-openapi-original.json

DERIVED

Security Posture 4

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

Yuno Authentication

apiKey · 3 schemes

SECURITY

Yuno Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Yuno Vulnerability Disclosure

Hackerone · contact published

SECURITY

Yuno Trust Center

GDPR, ISO/IEC 27001, ISO/IEC 27701, PCI DSS, SOC 2 Type 2, Visa Service Provider

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

SignUp

Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

OpenAPI

OpenAPI

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

MCPServer

MCPServer

AgentSkill

AgentSkill

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Conventions

Idempotency

ErrorCatalog

Lifecycle

Conformance

Components

DataModel

Webhooks

Scroll for all 8

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

DeclineCodes

Access & Security 6

Authentication, authorization, and security posture

DomainSecurity

TrustCenter

Compliance

Security

Authentication

VulnerabilityDisclosure

VulnerabilityDisclosure

Operate 3

Status, limits, changes, and where to get help

StatusPage

StatusPage

ChangeLog

ChangeLog

ChangeLog

ChangeLog

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: yuno
name: Yuno
description: Yuno is a global payment orchestration platform that lets merchants connect to 1,000+ payment methods, PSPs,
  anti-fraud, and payout providers through a single API and SDK. Its unified checkout, smart routing, and no-code workflows
  consolidate a company's payment stack, reduce processing fees, and improve approval rates across markets. Yuno exposes payments,
  checkout sessions, customers, subscriptions, payouts, disputes, reports, banking connectivity, and a PCI Proxy, plus Web/iOS/Android/React
  Native/Flutter checkout SDKs, an official MCP server, and an agent toolkit for building agentic payment flows. Yuno is certified
  to PCI DSS v4.0, SOC 2 Type 2, ISO/IEC 27001, ISO/IEC 27701, GDPR, and is a recognized Visa Service Provider.
url: https://raw.githubusercontent.com/api-evangelist/yuno/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
image: https://y.uno/favicon.ico
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
- tiger-global
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-17
x-docs-hosting: vercel
tags:
- Company
- Payments
- Payment Orchestration
- Fintech
- Checkout
- Payouts
- Subscription
tags_raw:
- Company
- Payments
- Payment Orchestration
- Fintech
- Checkout
- Payouts
- Subscriptions
- API
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: Yuno Payments API
  description: Core Yuno Payments API — customers, checkout sessions, payments, refunds, captures, subscriptions, payouts,
    disputes, reports, banking connectivity and PCI Proxy. Header API-key auth with X-Idempotency-Key idempotency.
  humanURL: https://docs.y.uno/reference/getting-started/api-reference-overview
  baseURL: https://api.y.uno
  image: https://y.uno/favicon.ico
  tags:
  - Payments
  - Payment Orchestration
  - Checkout
  properties:
  - type: OpenAPI
    url: openapi/_original/yuno-openapi-original.json
  - type: Documentation
    url: https://docs.y.uno/docs/your-payment-operative-system
  - type: APIReference
    url: https://docs.y.uno/reference/getting-started/api-reference-overview
common:
- type: DomainSecurity
  url: security/yuno-domain-security.yml
- type: Website
  url: https://y.uno
- type: DeveloperPortal
  url: https://docs.y.uno/
- type: Documentation
  url: https://docs.y.uno/docs/your-payment-operative-system
- type: APIReference
  url: https://docs.y.uno/reference/getting-started/api-reference-overview
- type: GettingStarted
  url: https://docs.y.uno/reference/getting-started
- type: SignUp
  url: https://dashboard.y.uno
- type: Blog
  url: https://y.uno/blog
- type: GitHubOrganization
  url: https://github.com/yuno-payments
- type: StatusPage
  url: https://status.y.uno
- type: TermsOfService
  url: https://y.uno/terms-and-conditions
- type: PrivacyPolicy
  url: https://y.uno/privacy
- type: TrustCenter
  url: https://security.y.uno/
- type: Compliance
  url: https://security.y.uno/
- type: Security
  url: https://security.y.uno/
- type: ChangeLog
  url: https://docs.y.uno/changelog
- type: OpenAPI
  url: openapi/_original/yuno-openapi-original.json
- type: LLMsTxt
  url: llms/yuno-llms.txt
- type: Packages
  url: packages/yuno-packages.yml
- type: SDKs
  url: packages/yuno-packages.yml
- type: MCPServer
  url: mcp/yuno-mcp.yml
- type: Authentication
  url: authentication/yuno-authentication.yml
- type: Conventions
  url: conventions/yuno-conventions.yml
- type: Idempotency
  url: conventions/yuno-conventions.yml
- type: ErrorCatalog
  url: errors/yuno-problem-types.yml
- type: DeclineCodes
  url: errors/yuno-decline-codes.yml
- type: Lifecycle
  url: lifecycle/yuno-lifecycle.yml
- type: Sandbox
  url: sandbox/yuno-sandbox.yml
- type: Conformance
  url: conformance/yuno-conformance.yml
- type: VulnerabilityDisclosure
  url: security/yuno-vulnerability-disclosure.yml
- type: Components
  url: components/yuno-components.yml
- type: DataModel
  url: data-model/yuno-data-model.yml
- type: Webhooks
  url: asyncapi/yuno-webhooks.yml
- type: Overlay
  url: overlays/yuno-openapi-overlay.yaml
- type: AgentSkill
  url: skills/_index.yml
- type: ChangeLog
  url: changelog/yuno-changelog.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 23
  pass: local-v1

Yuno API — frequently asked questions

Does Yuno have an API?

Yes. APIs.io lists 1 API from Yuno, including Yuno Payments API.

Is there an OpenAPI specification for the Yuno API?

Yes. APIs.io indexes 1 OpenAPI specification for Yuno, each linked for download from this page.

How do I authenticate with the Yuno API?

Yuno uses bearer-token authentication (apiKey · 3 schemes). The details are profiled on APIs.io as Yuno Authentication.

Does Yuno have an MCP server?

Yes. APIs.io lists 1 MCP server for Yuno: Local (stdio) MCP server; 6 tools listed.

Is the Yuno API ready for AI agents?

Yuno has a Kin Score of 49.7 out of 100 (developing) and an Agent Readiness score of 30.3 (agent-ready), scored by API Evangelist on 2026-11-06.

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