REST API v2

Sqare API v2 is a ground-up redesign with consistent resource naming, cursor-based pagination, standard HTTP status codes, and structured error objects on every endpoint. The v1 API remains available until January 2027; a migration guide is available in the developer docs.

New Capabilities

• GraphQL endpoint — query exactly the fields you need across automations, tasks, and integrations in a single round-trip

• Webhooks v2 — real-time event streaming with at-least-once delivery guarantees and automatic retries on 5xx responses

• Idempotency keys — attach an Idempotency-Key header to any mutating request to safely retry without duplicating side effects

• Batch endpoints — create or update up to 100 resources in a single API call

Official SDKs

First-party SDKs are now available for TypeScript / JavaScript (Node.js + edge runtimes) and Python 3.9+. Both are open source on GitHub, fully typed, and ship with built-in retry logic and rate-limit handling. API keys are generated from the Developer Settings page in your dashboard.