Checkout

Checkout is a global payments platform offering a suite of APIs and tools that enable businesses to accept, process, and manage online payments. It provides unified payments API, hosted payment pages, mobile SDKs, fraud detection, authentication, issuing, payouts, and advanced features like AI-driven intelligent acceptance and real‑time account updates. Checkout serves enterprises across e‑commerce, marketplaces, travel, gaming, fintech, and more, delivering high‑performance, secure, and scalable payment solutions worldwide.

Checkout is listed with 2 APIs on the APIs.io network. Tagged areas include Payments, Fintech, API, E-commerce, and Global.

The Checkout catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 1 Spectral governance ruleset.

Checkout’s developer surface includes authentication, support, signup flow, pricing, engineering blog, getting-started guide, documentation, and 24 more developer resources.

🌐 Visit website 📡 Source on GitHub
57.2/100 strong Agent 35/100 agent ready Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0
2 APIs
PaymentsFintechAPIE-commerceGlobal

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0
Composite quality — 57.2/100 · strong
Contract Quality 11.2 / 21
Developer Ergonomics 9.3 / 17
Access Clarity 8.9 / 17
Operational Transparency 4.4 / 11
Contract Governance 8.1 / 10
Discoverability 5.2 / 9
Regulatory Posture 4.8 / 15
Agent readiness — 35/100 · 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 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 6 / 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 6 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 6 / 6
Agentic Commerce Well-Known Document 0 / 5
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 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/.
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 github.com/api-evangelist/checkout: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 2

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

Checkout API

Checkout API provides payment processing endpoints as documented in the API reference.

Checkout API

Checkout API as documented publicly: 4 operations. Contract generated from the documentation by API Evangelist (2026-10-08); not the provider's own document.

Event Specifications 1

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

Checkout Webhooks

ASYNCAPI

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Checkout Context

1 classes · 3 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Checkout API Rules

10 rules · 8 errors 1 warnings 1 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

PostRequest

3 properties

JSON SCHEMA

Security Posture 3

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

Checkout Authentication

1 scheme

SECURITY

Checkout Domain Security

TLSv1.3 · DMARC

SECURITY

Checkout Vulnerability Disclosure

Bugcrowd

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

SignUp
SignUp
 GettingStarted
GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt
 WellKnown
WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral
Spectral
 JSONLD
JSONLD
 Vocabulary
Vocabulary
 Webhooks
Webhooks
 DataModel
DataModel
 Conformance
Conformance

Build 3

SDKs, sample code, and the tooling you integrate with

SDKs
SDKs
 Packages
Packages
 GitHubOrganization
GitHubOrganization

Access & Security 5

Authentication, authorization, and security posture

Security
Security
 Authentication
Authentication
 TrustCenter
TrustCenter
 VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support
Support
 StatusPage
StatusPage

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy
 Pricing
Pricing

Company 3

The organization behind the API

Newsroom
Newsroom
 Blog
Blog
 Website
Website

Other 3

Properties that don't map to a standard resource type

Hosts
Hosts
 Vendors
Vendors
 Leadership
Leadership

Source (apis.yml)

apis.yml Raw ↑ 
aid: checkout
name: Checkout
image: https://cdn.prod.website-files.com/64db80a5e88c6b1723ff760b/67e2bd4ddf0a87a1400c020d_website-thumbnail.jpg
description: Checkout is a global payments platform offering a suite of APIs and tools that enable businesses to accept, process,
  and manage online payments. It provides unified payments API, hosted payment pages, mobile SDKs, fraud detection, authentication,
  issuing, payouts, and advanced features like AI-driven intelligent acceptance and real‑time account updates. Checkout serves
  enterprises across e‑commerce, marketplaces, travel, gaming, fintech, and more, delivering high‑performance, secure, and
  scalable payment solutions worldwide.
url: https://raw.githubusercontent.com/api-evangelist/checkout/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-08 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-08'
modified: '2026-10-08'
tags:
- Payments
- Fintech
- API
- E-commerce
- Global
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/checkout-rules.yml
- type: JSONLD
  url: json-ld/checkout-context.jsonld
- type: Vocabulary
  url: vocabulary/checkout-vocabulary.yml
- type: Webhooks
  url: asyncapi/checkout-webhooks.yml
- type: DataModel
  url: data-model/checkout-data-model.yml
- type: Security
  url: security/checkout-vulnerability-disclosure.yml
- type: Authentication
  url: authentication/checkout-authentication.yml
- type: Conformance
  url: conformance/checkout-conformance.yml
- type: LLMsTxt
  url: llms/checkout-llms.txt
- type: WellKnown
  url: well-known/checkout-well-known.yml
- type: Hosts
  url: hosts/checkout-hosts.yml
- type: Vendors
  url: vendors/checkout-vendors.yml
- type: SDKs
  url: packages/checkout-packages.yml
- type: Packages
  url: packages/checkout-packages.yml
- type: TrustCenter
  url: https://trust.checkout.com/
- type: TermsOfService
  url: https://www.checkout.com/legal/terms-and-policies
- type: Support
  url: https://support.checkout.com
- type: StatusPage
  url: https://identity.checkout.com/app/statuspage_saml/exk1izzuix2ptvgqk0h8/sso/saml?SAMLRequest=fZLLbsIwEEV%2FJTuvnPfDWASJFlVFoioC2kU3yHUcYkHskHEQ5eubhFJoFyws2dK9Z%2B7MeAis3FV03JhCLcS%2BEWCsMYCojdTqUStoSlEvRX2QXLwtZikqjKmAOk7JFNsIGwwzDVTdVWoHoD0t0OFnJ7ImLVAq1tGuXpkJZaT5snkh%2BFY3xua6dFhVOVfcuueI49aTp1Mjj35lDpv91i3IbxVkPemaiz57inK2g7bgdJKidZKLgISej3MS%2BTgUCcHEHeQ49qIwicmAhTFppQCNmKq2pjIp8l0%2Fxp6LXbLyXBpFNAw%2BkDWvtdFc7x6kyqTapKipFdUMJFDFSgHUcLocv8yob7v08ywC%2BrxazfH8dblC1ruooW%2B%2BFSDrWO4U0C78fRK7rODWUt33VD9R0WjYqWnfXj26DJ2TjAwGcY4zPw9xyLiHSRb7mLOM5V4SBBn%2Fv86hcws6v%2F7%2BldE3&RelayState=https%3A%2F%2Fcheckout-services.statuspage.io%2F&SigAlg=http%3A%2F%2Fwww.w3.org%2F2001%2F04%2Fxmldsig-more%23rsa-sha256&Signature=bc0Uml1jiH3UR8BJDHFDVIDwkTg%2FUMkz1HyfQJZTSgjFUDb87cGZFo1HnSVjCjNyGnb7P756QWVdqy%2B5S3SSaAbVDOcaMPjm3dXbajeGe8EIb3CfyIEUdyOeoJ6caRoqTjo0zzsRIzOma4x6jYv6wJIwPGVGNJ1ZZ3uISuSoom4sGoYtBGbcQpYxsXdgFcDB6pqSl%2FVpgAoaZRjodT%2FlaeDPTFSNqXY4Z3lunCl0iKSkhEQ80epunGS9gWMPdv%2Bp%2F%2FFl6YdKHWV8vsN3Jgh0uZIfino1gE42Bt9tQDNasLU04pP7Yvr6nR4x%2Bpo9Kgm0b2Uee27rCRxpYaU9PVuvDQ%3D%3D
- type: SignUp
  url: https://www.checkout.com/events/register-interest-padel
- type: PrivacyPolicy
  url: https://www.checkout.com/legal/privacy-notice
- type: Pricing
  url: https://www.checkout.com/pricing
- type: Newsroom
  url: https://www.checkout.com/newsroom
- type: Leadership
  url: https://www.checkout.com/leadership
- type: Blog
  url: https://www.checkout.com/blog
- type: GettingStarted
  url: https://www.checkout.com/docs/card-issuing/card-program-setup
- type: Documentation
  url: https://docs.checkout.com/
- type: APIReference
  url: https://api-reference.checkout.com/
- type: GitHubOrganization
  url: https://github.com/checkout
- type: VulnerabilityDisclosure
  url: security/checkout-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/checkout-domain-security.yml
- type: Website
  url: https://www.checkout.com
apis:
- name: Checkout API
  description: Checkout API provides payment processing endpoints as documented in the API reference.
  humanURL: https://api-reference.checkout.com/
  aid: checkout:checkout-api-2
- aid: checkout:checkout-api
  name: Checkout API
  description: 'Checkout API as documented publicly: 4 operations. Contract generated from the documentation by API Evangelist
    (2026-10-08); not

    the provider''s own document.'
  humanURL: https://www.checkout.com/docs/resources/api-authentication/api-keys
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/checkout-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/checkout-post-request-schema.json
x-coverage:
  state: gated
  reason: partner-login
  method: derived
  generated: '2026-10-08'
  generator: derive-coverage.py (pre-flight evidence)
  detail: the company serves an API surface but requires credentials before any description of it can be read
  evidence:
  - url: https://identity.checkout.com/mcp
    status: 403
  - url: https://www.checkout.com
    status: 200
x-enrichment:
  date: '2026-10-08'
  status: enriched
  artifacts_added: 20
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

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