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Adds one or more headers to every request the connection sends. This plugin appends to whatever headers are already on the request, so if a header with the same name is already present, your value is added alongside it rather than replacing it. Use this when an API expects an extra header on each call, such as a tracking tag or an additional content negotiation hint, and you want to keep any value the request already carries.

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Fields

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Headers

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Sample data

This plugin adds fixed headers to outgoing requests rather than transforming entity data, so there is no before/after to show. The example below adds an X-Source header and an extra Accept value to every request the connection makes.
FieldValue
HeadersX-Source = alumio, Accept = application/json