Unified ID 2.0 (UID2)

Unified ID 2.0 is an open-source, deterministic identity framework seeded by The Trade Desk and now governed by the IAB Tech Lab. UID2 resolves hashed email addresses and phone numbers into rotating tokens that publishers, DSPs, SSPs, and measurement vendors can use for addressable advertising without third-party cookies. The EUID variant provides a GDPR-aligned European deployment.

Unified ID 2.0 (UID2) is one of 6 APIs that The Trade Desk publishes on the APIs.io network.

Tagged areas include Identity, Privacy, Open Source, and IAB Tech Lab. The published artifact set on APIs.io includes API documentation and SDKs.

Documentation GitHub

Documentation

https://unifiedid.com/docs/intro

https://github.com/IABTechLab/uid2docs

SDKs

https://github.com/IABTechLab/uid2-operator

Other Resources

https://unifiedid.com

API entry from apis.yml

aid: trade-desk:trade-desk-uid2-api
name: Unified ID 2.0 (UID2)
tags:
- Identity
- Privacy
- Open Source
- IAB Tech Lab
humanURL: https://unifiedid.com
properties:
- url: https://unifiedid.com
  type: Portal
- url: https://unifiedid.com/docs/intro
  type: Documentation
- url: https://github.com/IABTechLab/uid2docs
  type: Documentation
  name: UID2 Documentation Repository
- url: https://github.com/IABTechLab/uid2-operator
  type: SDK
  name: UID2 Operator Reference Implementation
description: Unified ID 2.0 is an open-source, deterministic identity framework seeded by The Trade Desk
  and now governed by the IAB Tech Lab. UID2 resolves hashed email addresses and phone numbers into rotating
  tokens that publishers, DSPs, SSPs, and measurement vendors can use for addressable advertising without
  third-party cookies. The EUID variant provides a GDPR-aligned European deployment.