# Block

**Canonical:** https://apis.io/providers/block/  
**Website:** https://www.block.xyz  
**APIs profiled:** 5

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.

## Kin Score — 42.6 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 42.6).

| Facet | Score |
|---|---|
| Discoverability | 72.2 |
| Contract Quality | 20.0 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 50.0 |
| Developer Ergonomics | 59.5 |
| Commercial Clarity | 32.9 |
| Access Clarity | 32.9 |

Regulatory layer — **Payments**: 48.4 (matched via tags).

## Agent readiness — 52.0 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | yes |
| Idempotency | verified |
| Error Semantics | no |
| OpenAPI Examples | verified |
| Rate Limit Signal | documented |
| Event Surface Described | yes |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (5)

- **Block Catalog API** — Manage product catalog
- **Block Customers API** — Customer management and engagement
- **Block Merchants API** — Merchant and location data
- **Block Orders API** — Create and manage orders
- **Block Payments API** — Process and manage payments

## MCP servers (1)

- **Block MCP Server**

## Agentic access (1)

- **Block Agentic Access** — 8 operations · 3 acting

## Security (2)

- **Block Authentication** — http/oauth2 · 2 schemes
- **Block Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Block Plans Pricing**

## Use cases (5)

- **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.

## Tags

Commerce, Cryptocurrency, E-Commerce, Fintech, Payments, Point-of-Sale, Square

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/block/). Scores are computed from the provider's own public artifacts under a published rubric.