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Block

Block, Inc. is a global technology company building economic empowerment tools through a family of products including Square (commerce and payments), Cash App (personal finance and investing), Afterpay (buy now pay later), TIDAL (music streaming), and Spiral (open-source Bitcoin development). The Square API enables developers to build commerce applications with payment processing, order management, catalog, customer engagement, and business operations capabilities.

1 APIs 5 Capabilities 7 Features 61.7 / 100 strong
CommerceCryptocurrencyeCommerceFintechPaymentsPoint Of SaleSquare

API Rating

61.7/ 100
strong
Scored 2026-05-20 · rubric v0.3
Discoverability80.0
Contract Quality66.7
Governance60.5
Operational Transparency52.6
Developer Ergonomics30.4
Commercial Clarity84.2

APIs

Square API

RESTful API for building commerce applications on the Square platform. Provides payment processing, order management, catalog management, customer profiles, loyalty programs, in...

Capabilities

Square API — Catalog

Square API — Catalog. 1 operations. Lead operation: Block Square List Catalog. Self-contained Naftiko capability covering one Block business surface.

Run with Naftiko

Square API — Customers

Square API — Customers. 2 operations. Lead operation: Block Square List Customers. Self-contained Naftiko capability covering one Block business surface.

Run with Naftiko

Square API — Merchants

Square API — Merchants. 1 operations. Lead operation: Block Square List Locations. Self-contained Naftiko capability covering one Block business surface.

Run with Naftiko

Square API — Orders

Square API — Orders. 1 operations. Lead operation: Block Square Create Order. Self-contained Naftiko capability covering one Block business surface.

Run with Naftiko

Square API — Payments

Square API — Payments. 3 operations. Lead operation: Block Square List Payments. Self-contained Naftiko capability covering one Block business surface.

Run with Naftiko

Features

Payment Processing

Accept card-present and card-not-present payments using Square hardware, web, or mobile SDKs with OAuth 2.0 or access token authentication.

Order Management

Create, update, and fulfill orders with line items, discounts, taxes, and service charges across online and in-person channels.

Catalog Management

Manage a unified product catalog with items, variations, modifiers, categories, taxes, and discounts synchronized across all locations.

Customer Engagement

Build customer profiles, loyalty programs, gift cards, and marketing campaigns to drive repeat business and customer retention.

Multi-Location Support

Manage multiple business locations with location-specific inventory, pricing, staff permissions, and reporting.

Webhook Events

Subscribe to real-time webhook events for payments, orders, inventory changes, customer activity, and subscription lifecycle events.

Sandbox Environment

Full sandbox environment with test card numbers, merchant accounts, and simulated hardware for development and testing.

Use Cases

Point of Sale Integration

Retailers and restaurants build custom POS applications using Square's payment, catalog, and order APIs.

eCommerce Checkout

Online stores integrate Square's Web Payments SDK and Orders API to accept payments and manage fulfillment.

Marketplace Payments

Multi-seller marketplaces use Square Connect to route payments to sellers and manage fees through the Payouts API.

Subscription Billing

SaaS and service businesses use Square Subscriptions API for automated recurring billing and invoice management.

Loyalty and Rewards

Businesses implement custom loyalty programs using the Loyalty API to track points, tiers, and reward redemptions.

Integrations

WooCommerce

Official Square extension for WooCommerce synchronizes inventory, products, and payments between WordPress stores and Square.

BigCommerce

Square integration for BigCommerce enables omnichannel selling with synchronized catalog and unified payment processing.

Xero

Square-Xero integration automatically syncs sales transactions and payments to Xero accounting for reconciliation.

QuickBooks

Square connector for QuickBooks Online syncs sales, refunds, and fees to QuickBooks for financial reporting.

Semantic Vocabularies

Block Context

35 classes · 0 properties

JSON-LD

API Governance Rules

Block API Rules

29 rules · 11 errors 15 warnings 3 info

SPECTRAL

Resources

🔗
LinkedIn
LinkedIn
🔗
Website
Website
🔗
Documentation
Documentation
🚀
GettingStarted
GettingStarted
💰
Pricing
Pricing
🟢
StatusPage
StatusPage
💬
Support
Support
👥
GitHubOrganization
GitHubOrganization
📜
TermsOfService
TermsOfService
📜
PrivacyPolicy
PrivacyPolicy
🔗
Login
Login
📦
Square SDKs
SDK
🔗
SpectralRules
SpectralRules
🔗
Vocabulary
Vocabulary

Sources

Raw ↑
aid: block
url: https://raw.githubusercontent.com/api-evangelist/block/refs/heads/main/apis.yml
name: Block
description: Block, Inc. is a global technology company building economic empowerment tools through a family of products including
  Square (commerce and payments), Cash App (personal finance and investing), Afterpay (buy now pay later), TIDAL (music streaming),
  and Spiral (open-source Bitcoin development). The Square API enables developers to build commerce applications with payment
  processing, order management, catalog, customer engagement, and business operations capabilities.
tags:
- Commerce
- Cryptocurrency
- eCommerce
- Fintech
- Payments
- Point Of Sale
- Square
type: Index
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
access: 3rd-Party
created: '2024-09-27'
modified: '2026-05-19'
position: Consuming
specificationVersion: '0.19'
apis:
- aid: block:block-square-api
  name: Square API
  description: RESTful API for building commerce applications on the Square platform. Provides payment processing, order management,
    catalog management, customer profiles, loyalty programs, invoicing, and merchant operations. Supports OAuth 2.0 and personal
    access token authentication. Available in sandbox and production environments.
  humanURL: https://developer.squareup.com/
  tags:
  - Commerce
  - eCommerce
  - Payments
  - Point Of Sale
  - Square
  properties:
  - type: Documentation
    url: https://developer.squareup.com/docs
  - type: OpenAPI
    url: openapi/block-square-api-openapi.yaml
  - type: SpectralRules
    url: rules/block-spectral-rules.yml
  - type: Vocabulary
    url: vocabulary/block-vocabulary.yaml
  - type: NaftikoCapability
    url: capabilities/square-catalog.yaml
  - type: NaftikoCapability
    url: capabilities/square-customers.yaml
  - type: NaftikoCapability
    url: capabilities/square-merchants.yaml
  - type: NaftikoCapability
    url: capabilities/square-orders.yaml
  - type: NaftikoCapability
    url: capabilities/square-payments.yaml
common:
- type: LinkedIn
  url: https://www.linkedin.com/company/joinblock
- type: Website
  url: https://www.block.xyz
- type: Documentation
  url: https://developer.squareup.com/docs
- type: GettingStarted
  url: https://developer.squareup.com/docs/get-started
- type: Pricing
  url: https://squareup.com/us/en/payments/our-rates
- type: StatusPage
  url: https://www.issquareup.com/
- type: Support
  url: https://developer.squareup.com/forums
- type: GitHubOrganization
  url: https://github.com/square
- type: TermsOfService
  url: https://squareup.com/us/en/legal/developer
- type: PrivacyPolicy
  url: https://squareup.com/us/en/legal/privacy
- type: Login
  url: https://developer.squareup.com/apps
- type: SDK
  url: https://developer.squareup.com/docs/sdks
  title: Square SDKs
- type: SpectralRules
  url: rules/block-spectral-rules.yml
- type: Vocabulary
  url: vocabulary/block-vocabulary.yaml
- type: Features
  data:
  - name: Payment Processing
    description: Accept card-present and card-not-present payments using Square hardware, web, or mobile SDKs with OAuth 2.0
      or access token authentication.
  - name: Order Management
    description: Create, update, and fulfill orders with line items, discounts, taxes, and service charges across online and
      in-person channels.
  - name: Catalog Management
    description: Manage a unified product catalog with items, variations, modifiers, categories, taxes, and discounts synchronized
      across all locations.
  - name: Customer Engagement
    description: Build customer profiles, loyalty programs, gift cards, and marketing campaigns to drive repeat business and
      customer retention.
  - name: Multi-Location Support
    description: Manage multiple business locations with location-specific inventory, pricing, staff permissions, and reporting.
  - name: Webhook Events
    description: Subscribe to real-time webhook events for payments, orders, inventory changes, customer activity, and subscription
      lifecycle events.
  - name: Sandbox Environment
    description: Full sandbox environment with test card numbers, merchant accounts, and simulated hardware for development
      and testing.
- type: UseCases
  data:
  - name: Point of Sale Integration
    description: Retailers and restaurants build custom POS applications using Square's payment, catalog, and order APIs.
  - name: eCommerce Checkout
    description: Online stores integrate Square's Web Payments SDK and Orders API to accept payments and manage fulfillment.
  - name: Marketplace Payments
    description: Multi-seller marketplaces use Square Connect to route payments to sellers and manage fees through the Payouts
      API.
  - name: Subscription Billing
    description: SaaS and service businesses use Square Subscriptions API for automated recurring billing and invoice management.
  - name: Loyalty and Rewards
    description: Businesses implement custom loyalty programs using the Loyalty API to track points, tiers, and reward redemptions.
- type: Integrations
  data:
  - name: WooCommerce
    description: Official Square extension for WooCommerce synchronizes inventory, products, and payments between WordPress
      stores and Square.
  - name: BigCommerce
    description: Square integration for BigCommerce enables omnichannel selling with synchronized catalog and unified payment
      processing.
  - name: Xero
    description: Square-Xero integration automatically syncs sales transactions and payments to Xero accounting for reconciliation.
  - name: QuickBooks
    description: Square connector for QuickBooks Online syncs sales, refunds, and fees to QuickBooks for financial reporting.
maintainers:
- FN: Kin Lane
  email: [email protected]