Afterpay

Afterpay (acquired by Block / Square) is a buy-now-pay-later platform offering Pay-in-4 installments at thousands of merchants. APIs for merchants to integrate via Square or direct.

Afterpay publishes 3 APIs on the APIs.io network. Tagged areas include Fintech, BNPL, Payments, Consumer, and Block.

🌐 Visit website 📡 Source on GitHub

19.7/100 emerging ▬ flat Agent 18/100 agent aware Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

3 APIs

FintechBNPLPaymentsConsumerBlock

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 19.7/100 · emerging

Contract Quality 9.2 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 2.2 / 17

Operational Transparency 0.9 / 11

Contract Governance 0.0 / 10

Discoverability 6.1 / 9

Regulatory Posture 2.8 / 15

Agent readiness — 18/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 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

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.

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/. This rating is computed from github.com/api-evangelist/afterpay: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 3

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

GraphQL 1

GraphQL schemas published by this provider.

Rate Limits 1

Documented rate limits and quota policies.

Afterpay Rate Limits

1 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LlmsText

LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 2

The organization behind the API

LinkedIn

Website

Website

Source (apis.yml)

aid: afterpay
url: https://raw.githubusercontent.com/api-evangelist/afterpay/refs/heads/main/apis.yml
name: Afterpay
kind: company
description: Afterpay (acquired by Block / Square) is a buy-now-pay-later platform offering Pay-in-4 installments at thousands
  of merchants. APIs for merchants to integrate via Square or direct.
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/afterpay.png
tags:
- Fintech
- BNPL
- Payments
- Consumer
- Block
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.23'
apis:
- name: Afterpay Checkout API
  description: Create and confirm Afterpay checkouts for merchant integrations.
  humanURL: https://developers.afterpay.com/afterpay-online/reference
  baseURL: https://api.afterpay.com
  tags:
  - Checkout
  - BNPL
  properties:
  - type: Documentation
    url: https://developers.afterpay.com/afterpay-online/reference
  - url: graphql/afterpay-graphql.md
    type: GraphQL
- name: Afterpay Payments API
  description: Auth, capture, void and refund Afterpay payments.
  humanURL: https://developers.afterpay.com/afterpay-online/reference
  baseURL: https://api.afterpay.com
  tags:
  - Payments
  properties:
  - type: Documentation
    url: https://developers.afterpay.com/afterpay-online/reference
- name: Afterpay Configuration API
  description: Retrieve merchant-level configuration and supported regions.
  humanURL: https://developers.afterpay.com/afterpay-online/reference
  baseURL: https://api.afterpay.com
  tags:
  - Configuration
  properties:
  - type: Documentation
    url: https://developers.afterpay.com/afterpay-online/reference
common:
- type: VulnerabilityDisclosure
  url: security/afterpay-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/afterpay-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/afterpay
- type: LinkedIn
  url: https://www.linkedin.com/company/afterpay-com-au
- type: Website
  url: https://www.afterpay.com/
- type: Plans
  url: plans/afterpay-plans-pricing.yml
- type: RateLimits
  url: rate-limits/afterpay-rate-limits.yml
- type: FinOps
  url: finops/afterpay-finops.yml
- type: LlmsText
  url: https://developers.afterpay.com/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Afterpay

Kin Score

APIs 3

Afterpay Checkout API

Afterpay Payments API

Afterpay Configuration API

GraphQL 1

Afterpay GraphQL Schema

Pricing Plans 1

Afterpay Plans Pricing

Rate Limits 1

Afterpay Rate Limits

FinOps 1

Afterpay Finops

Security Posture 2

Afterpay Domain Security

Afterpay Vulnerability Disclosure

Resources