# Signifyd Sale (Checkout) API

**Canonical:** https://apis.io/apis/signifyd/signifyd-sale-api/  
**Provider:** Signifyd — https://apis.io/providers/signifyd/  
**Documentation:** https://developer.signifyd.com/main/reference

Signifyd Sale (Checkout) API is one of 8 APIs that [Signifyd](https://apis.io/providers/signifyd/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Sale, Checkout, Fraud, Order, and E-Commerce. The published artifact set on APIs.io includes API documentation and a getting-started guide.

Submit checkout and sale events to Signifyd's Commerce Protection Platform for real-time fraud and chargeback risk evaluation. The Checkout flow supports pre-authorization screening, while the Sale flow handles post-authorization order submission. Responses return a guarantee decision — ACCEPT, HOLD, or REJECT — typically within hundreds of milliseconds, with results delivered synchronously and/or via the ORDER_CHECKPOINT_ACTION_UPDATE webhook.

## Machine-readable artifacts (3)

- **Documentation** — https://developer.signifyd.com/main/reference
- **GettingStarted** — https://developer.signifyd.com/main/docs/getting-started
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/signifyd/refs/heads/main/apis.yml

## Other Signifyd APIs (7)

- [Signifyd Transaction API](https://apis.io/apis/signifyd/signifyd-transaction-api/)
- [Signifyd Decisions API](https://apis.io/apis/signifyd/signifyd-decisions-api/)
- [Signifyd Feedback API](https://apis.io/apis/signifyd/signifyd-feedback-api/)
- [Signifyd Returns API](https://apis.io/apis/signifyd/signifyd-returns-api/)
- [Signifyd Sales Tax API](https://apis.io/apis/signifyd/signifyd-sales-tax-api/)
- [Signifyd Account Protection API](https://apis.io/apis/signifyd/signifyd-account-protection-api/)
- [Signifyd Webhooks API](https://apis.io/apis/signifyd/signifyd-webhooks-api/)

## Tags

Sale, Checkout, Fraud, Order, E-Commerce

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/signifyd/signifyd-sale-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/signifyd/.