Use Octokit to add a particular webhook to all of your repos (handy for things like chat integration)

octohooks.rb

# This is just a scratchpad after I hacked what I needed in an irb session
require 'octokit'

Octokit.configure do |c|
  c.login = 'searls'
  c.password = 'c0d3b4ssssss!'
end

client = Octokit::Client.new
repos = client.repos #Note, for an org's repos, see `client.orgs.first.rels[:repos].get.data`
repos.each do |repo|
  if repo.permissions.admin
    client.create_hook(repo.full_name, 'web',
      {
        :url => 'https://some/hook/url',
        :content_type => 'json'
      },
      { :active => true }
    )
  end
end