Fastify plugin to add response debug headers.

fastify, fastify-plugin, debug
npm install fastify-debug-headers@3.0.3



Package Dependencies Build Coverage

Fastify plugin to add response debug headers.


Just run:

npm install fastify-debug-headers --save


Register as a plugin, optional providing any of the following options:

  • prefix: The prefix to use for the headers. Default is Fastify.
  • servedBy: If to add a X-Fastify-Served-By header with the hostname of the machine which processed the request. Default is true.
  • requestId: If to add a X-Fastify-Request-Id header with the request id. Default is true.
  • responseTime: If to add a X-Fastify-Response-Time header with the response time in milliseconds. Default is true.

Once registered, the plugin will add the headers as described above.

ESM Only

This package only supports to be directly imported in a ESM context.

For informations on how to use it in a CommonJS context, please check this page.

Contributing to fastify-debug-headers

  • Check out the latest master to make sure the feature hasn't been implemented or the bug hasn't been fixed yet.
  • Check out the issue tracker to make sure someone already hasn't requested it and/or contributed it.
  • Fork the project.
  • Start a feature/bugfix branch.
  • Commit and push until you are happy with your contribution.
  • Make sure to add tests for it. This is important so I don't break it in a future version unintentionally.


Copyright (C) 2019 and above Shogun (

Licensed under the ISC license, which can be found at