A collective list of APIs. Build.

Postmark delivers email triggered by an action in your app. No bulk. That means your app's email isn't stuck waiting behind 500,00 ... Read More

Shippo in an API and dashboard that connects you to multiple shipping providers, simplifying the process of implementing a shippin ... Read More

Cronofy provides a single API for Apple, Exchange, Google, Office 365, and Outlook.com calendars for real-time scheduling ... Read More

Reliable and scalable email delivery platform with SMTP and API. Real-time monitoring service for all your email traffic. Respon ... Read More

The Mapbox Matrix API returns travel times between many points. ... Read More

Hack NYTimes news and information ... Read More

Provides third-party integration with the TweetMeme web service, used to track popular links on Twitter ... Read More

Turn Google Spreadsheets into an API ... Read More

Used by Google products to create short URLs that can be easily shared, tweeted, or emailed to friends. ... Read More

Offers an API that allows developers to build location-aware applications for mobile devices ... Read More

To power location experiences for their users. ... Read More

Channel Messaging API lets your build real-time application. ... Read More

Content Analysis detects, ranks, and resolves entities in unstructured content and classifies a document against our taxonomy ... Read More

Offers premium search and geo API services allowing you to build innovative technology applications quickly and efficiently ... Read More

Visit Rank tells how popular and influential a web domain is. Get a rank for any of 385 million domains. ... Read More

With Yclas API you have a full backend to create adversitements, categories, locations, geolocations and much more in a simple and ... Read More

Local Web Services ... Read More

The Wordnik API lets you request definitions, example sentences, spelling suggestions, related words like synonyms and antonyms, p ... Read More

Is available for non-commercial use by outside developers. Commercial use is possible by prior arrangement. ... Read More

Gather and compare all kinds of interesting data, they weren't really interactive with Gowalla itself. ... Read More

The SMS Service,allows you to send and receive text messages, of up to 160 characters, to and from a mobile phone ... Read More

The Force.com SOAP API (formerly known as the Force.com Web Services API) lets you integrate Force.com applications that can creat ... Read More

Keep your registration forms simple. Optimize your conversions and let us determine the gender of your customers ... Read More

Create the Uber for anything , A small business API for on-demand fulfillment ... Read More

A social platform that both users and developers can interact with, the company has faced some difficulty in gaining ongoing tract ... Read More