# Sailthru JavaScript API (Personalization Engine)

**Canonical:** https://apis.io/apis/sailthru/sailthru-js-api/  
**Provider:** Sailthru — https://apis.io/providers/sailthru/  
**Base URL:** https://ak.sail-horizon.com  
**Documentation:** https://products.zetaglobal.com/sailthru/Content/developers/api-client/javascript.html

Sailthru JavaScript API (Personalization Engine) is one of 2 APIs that [Sailthru](https://apis.io/providers/sailthru/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Personalization, JavaScript, and Web. The published artifact set on APIs.io includes API documentation.

The client-side Sailthru JavaScript tag (spm.v1.min.js, served from ak.sail-horizon.com) used for on-site behavior tracking, content-library sync, userSignUp/userSignUpConfirm calls and on-site personalization. It is the browser counterpart to the server-side API and is loaded as a script rather than called over REST.

## Machine-readable artifacts (1)

- **Documentation** — https://products.zetaglobal.com/sailthru/Content/developers/api-client/javascript.html

## Other Sailthru APIs (1)

- [Sailthru API](https://apis.io/apis/sailthru/sailthru-api/)

## Tags

Personalization, JavaScript, Web

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