Adzerk's flexible APIs make it easy to build the exact ad platform you want, in 90% less time than building it from scratch.

Think of Adzerk like a box of Legos: our server-side infrastructure tools let you build, test, and tweak any ad server - with flexibility around pricing, look/feel, targeting, pacing, and much more.

Test the API

How Server-Side Ad Insertion Works


an ad request to Adzerk when you need a decision made (no JavaScript tags needed).

curl -H 'Content-Type:application/json' \
  -X POST \
  -d '{"placements":[{
  "user":{"key":"abc"}}' \


the JSON response from Adzerk that contains info and tracking links for the winning ad.



the content wherever you want, such as your site, app, OOH digital property, etc.


Scalable & Fast Decision Engine

Add thousands of ads & promotions

Adzerk accepts any type of media (image, audio, video, etc)

Ad request

Ping Adzerk server-side when you need to display content

Robust targeting options

The engine filters by targeting rules like geo, user-data, search terms, key/value pairs, etc

Pacing & revenue algorithms

Use pacing tools to ensure campaigns don't go over budget; use auction pricing to maximize revenue and/or relevance

Winner returned in JSON

Adzerk returns the best promotion to display in as low as 50ms

Built for developers. Trusted by enterprises.

Keep building an awesome core business while staying confident Adzerk can support your ad server.

99.99% API Uptime

We’ve been doing this for a decade - we know how to keep the system running

Fast Response Times

Adzerk is all about speed at scale. We can get as low as 50ms response times, even while handling 3B daily requests

Dev Support On Deck

You’ll be teamed with support engineers, software engineers, account managers, and a Slack channel

GDPR Compliance

Our tools are 100% GDPR compliant by default - no need to worry about non-compliance

Enterprise Security

We've got SOC 1 (SSAE 16) certifications, VPCs, and more

Adzerk is the award-winning market leader in server-side promotions

2019 - Most Innovative Tech Company of the Year (Silver)
2019 - G2Crowd Top Ad Serving Tech
2019 - #1 Ad Serving Tech on Capterra
AWS Select-Tier Tech Partner
2019 - Best Place to Work

Ready to build your own server-side ad server?

Adzerk is scalable, fast, and always picks the right promotion to show. They are easily the leading solution in the market.
David Han, VP of Product, Ticketmaster

Learn how Adzerk can help you build your own ad server in weeks, not years

Sign-up and start building