The SigOpt API allows developers to access and integrate the functionality of SigOpt with other applications and websites. Some example API methods include creating and managing experiments, retrieving data and analytics, and managing accounts. SigOpt is an optimization platform that helps users optimize anything through fine-tuning experiments.

The API allows developers to access and integrate the functionality of with other applications and to create new applications. Public documentation is not available; interested developers should contact for more information. is an on-demand roadside assistance application.


The Trackin API allows developers to access and integrate the functionality of Trackin with other applications. Public documentation is not available; interested developers should email for API access. Trackin is an online ordering and delivery management platform for restaurants.

Xero Files

Offered by Xero, an accounting software service, the Files API offers Xero interfaces with members' files and folders. The RESTful API accepts requests in either JSON or XML and authenticates third party apps via OAuth 1. Use the XERO Files API to upload and download files, manage folders, and associate files with other documents like invoices or contacts.

IBM Watson Visual Recognition

The IBM Visual Recognition API analyzes images and video frames in order to understand their content. It is capable of annotating images based solely on their visual content, without users having to describe and tag content manually. The API recognizes visual entities using semantic classifiers based on machine-learning technology.

IBM Watson User Modeling

The IBM User Modeling API uses linguistic analytics to learn peoples' preferences in order to better engage with them. Using the API, developers can derive insights from enterprise data, social media, and other digital communications. The API extracts cognitive and social characteristics, which can help businesses anticipate customer needs and recommend future actions.

IBM Watson Tradeoff Analytics

The IBM Watson Tradeoff Analytics API uses visualizations and recommendations to help users explore tradeoffs when trying to meet conflicting goals. Users can specify their objectives, preferences, and priorities and the service will then filter out the less attractive options, leaving only the best candidate choices. This way, decision makers only need to consider the best options when making their final decision.

IBM Watson Text to Speech

The IBM Text to Speech API allows users to synthesize speech from English or Spanish text. Currently, there is a male voice available for both languages and a female voice for English. The service incorporates the appropriate cadence and intonation into the synthesized speech to help it sound natural. The Text to Speech service can create audio files in .wav or .ogg format.

IBM Watson Speech to Text

The IBM Speech to Text API automatically transcribes English speech to text. Developers can use this API to add speech transcription capabilities to their applications. Speech recognition accuracy is highly dependent on the quality of input audio, and the service can only transcribe words that it knows. Thus, the conversion of speech to text may not be perfect. IBM Speech to Text is part of the Watson Developer Cloud and is currently still in beta.

IBM Watson Relationship Extraction

The IBM Relationship Extraction API enables users to extract useful information - such as people, places, organizations, events, and the relationships between them - from text. This is the beta release of the API, and it may not be supported if a new beta is released or when the service exits beta. As a result, this service is not suggested for production use.