Attribution-Reporting-Eligible header

The HTTP Attribution-Reporting-Eligible request header indicates that the corresponding response is eligible to register an attribution source or trigger.

This header is never set manually and is instead sent by the browser in response to various HTML element or JavaScript request settings. Depending on the allowed registrations specified in the Attribution-Reporting-Eligible value, the server is expected to respond with either an Attribution-Reporting-Register-Source or Attribution-Reporting-Register-Trigger header to complete the registration of an attribution source or trigger, respectively.

See the Attribution Reporting API for more details.

Header type	[Request header](https://developer.mozilla.org/en-US/docs/Glossary/Request%20header)
[Forbidden request header](https://developer.mozilla.org/en-US/docs/Glossary/Forbidden%20request%20header)	No

Syntax

Attribution-Reporting-Eligible: <allowed-registrations>

Directives

• <allowed-registrations>
  • : A structured-header dictionary representing the registrations allowed in the corresponding response. Possible keys are:
    • event-source
      • : An event-based attribution source can be registered.
    • navigation-source
      • : A navigation-based attribution source can be registered.
    • trigger
      • : An attribution trigger can be registered.

Every response in a redirect chain can register at most one source or one trigger.

Examples

Attribution-Reporting-Eligible: trigger

Specifications

Browser compatibility

See also

• Attribution-Reporting-Register-Source
• Attribution-Reporting-Register-Trigger
• Attribution Reporting API