FamilySearch Wiki API

Overview
The FamilySearch Wiki API provides developers code-level access to the entire FamilySearch Wiki reference. The goal of this API is to provide direct, high-level access to the data contained in the FamilySearch Wiki databases. Client programs can use the API to login, get data, and post changes. The API uses RESTful calls and supports a wide variety of formats including XML, JSON, PHP, YAML and others.

https://wiki.familysearch.org/en/api.php

Applications Currently Consuming the FamilySearch Wiki API

 * FamilySearch RecordSearch
 * LiveRoots
 * Mobile Tree (Pulling up in a view the wiki)