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Last Updated: 02/01/2026
in Privacy
1. Introduction& Disclaimer Overview Transparency is the foundation of the ID5 ID. To ensure the ID5 ID
Service operates securely and in compliance with global data protection
standards, ID5 requires all partners and their downstream parti...
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Last Updated: 01/19/2026
in Access Identity Graphs
Overview
With the Partner Graph File Transfer, your AWS S3 bucket will be filled at regular time intervals with new and updated Match Partner UIDs coming from the cascading process.
The time interval that ID5 pushes fi...
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Last Updated: 12/10/2025
in Enrich
This guide explains how to use EID (Extended Identifier) information from an ID5 endpoint response to enrich outgoing OpenRTB bid requests for both OpenRTB 2.6 and 2.5.
Identify and Extract EID Data from ID5 Endpoint Response
The necess...
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Last Updated: 12/04/2025
in Get Started Core Value Proposition Prevent data leakage by permissioning user IDs to authorized partners only Ensure compliance with data privacy regulations thanks to ID5’s privacy-by-design technology Identify authenticated and unauthenticated users in a...
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Last Updated: 12/04/2025
in Enrich
Overview Publishers and ad tech partners can choose to use the ID5 Graph to enrich their programmatic transactions with additional data. The Graph enables both probabilistic and deterministic connections between ID5 IDs and Platform Cookie IDs, w...
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Last Updated: 12/04/2025
in Privacy
Overview The Privacy API Opt-out endpoint allows authorized partners to opt out users from ID5 tracking using various privacy identifiers including ID5 ID, MAIDs, email addresses, and hashed emails. The system handles multiple identifier types an...
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Last Updated: 11/26/2025
in Retrieve ID5 IDs Prebid
ID5 Prebid Identity Insights Identity Insights is enabled through ID5's Analytics Adapted for Prebid, available for Prebid.js version 7.27.0 or higher
To help publishers better understand the value of working with ID5, we have launched Ident...
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Last Updated: 11/25/2025
When ID5 provides an ID5 ID, we may also include certain metadata. Below you will find the different types of metadata we support and the values they could contain:
Link Type
A/B Testing Control Group
Link...
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Last Updated: 11/25/2025
in Get Started
Core Value Proposition
Bid on more impressions, track conversion attribution to ultimately improve bidding strategies and campaign performance in all digital advertising environments with the ID5 ID
Enable clients to reach and engage wit...
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Last Updated: 10/08/2025
in Enrich
Overview ID5's Graph can empower ad tech platforms to unlock greater value by connecting users across both cookie-based and cookieless environments. By combining the scale of the ID5 ID footprint with the intelligence of the ID5 Identity Graph, E...