# Hadron ID API

**Canonical:** https://apis.io/apis/audigent/hadron-id-api/  
**Provider:** Audigent — https://apis.io/providers/audigent/  
**Base URL:** https://id.hadron.ad.gt/api/v1  
**Documentation:** https://docs.prebid.org/dev-docs/modules/userid-submodules/hadron.html

Hadron ID API is one of 4 APIs that [Audigent](https://apis.io/providers/audigent/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Identity, AdTech, and Prebid. The published artifact set on APIs.io includes API documentation.

Public, anonymous identity-resolution endpoint that returns Audigent's cookieless Hadron ID (plus hadronIdv2 and the legacy haloId) for the calling browser. Called by the Prebid.js hadronIdSystem user-id submodule. Accepts a partner_id identifier and consent signals (gdpr, gdprString, us_privacy, gpp, gpp_sid) as query parameters and responds with JSON. No OpenAPI is published; the request contract is legible in the open-source Prebid.js module source.

## Machine-readable artifacts (3)

- **Documentation** — https://docs.prebid.org/dev-docs/modules/userid-submodules/hadron.html
- **SourceCode** — https://github.com/prebid/Prebid.js/blob/master/modules/hadronIdSystem.js
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/audigent/refs/heads/main/apis.yml

## Other Audigent APIs (3)

- [Hadron Real-Time Data (RTD) API](https://apis.io/apis/audigent/hadron-real-time-data-rtd-api/)
- [Hadron Analytics API](https://apis.io/apis/audigent/hadron-analytics-api/)
- [Audigent Platform API](https://apis.io/apis/audigent/audigent-platform-api/)

## Tags

Identity, AdTech, Prebid

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/audigent/hadron-id-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/audigent/.