SimilarWeb Website Referrals API

whois

Returns well-parsed whois fields in XML and JSON formats. Use it to track domain registrations, check domain name availability, detect credit card fraud, locate users geographically. The service automatically follows the whois registry referral chains until it finds the correct whois registrars with the most complete whois data. Works over basic HTTP and avoices firewall-related problems of accessing Whois servers on port 43.

SeatGeek

SeatGeek is a ticket search site that aggregates sports, concert, and theater ticket listings from over 60 ticketing sites -- including StubHub and TicketsNow. The SeatGeek API provides developers with broad access to the company’s dataset of nearly 100,000 live events. The RESTful API returns requests in JSON, JSONP, and XML and can provide detailed information on venue lat/lon, average ticket price, seating location, and more. SeatGeek has a community portal that keeps a record of all support conversations and is a useful tool when looking to get questions answered. Sites can also monetize their content with SeatGeek's API by registering in SeatGeek's Partner Program. Each time a partner sends a referral to SeatGeek and they purchase a ticket, SeatGeek will pay their partner 50% of the revenue earned on that transaction. Currently users are averaging $11 per sale generated.

Branch Metrics

The Branch SDK Less API under branch metrics is used to track events associated with user and tie back to referring source and generate URL for sharing/referral purposes (optional for tracking shareability/invites/referrals).

Measurely Lymbix

Lymbix launched a new platform that leverages the power of its sentiment and text analytics technology to power an all new content analytics engine. Measure.ly takes on the role of merging your content and social efforts by measuring the real earned media that drives convertable value for your marketing campaign. Focus on the content, influencers, and referrals that perform.