diff --git a/app/logical/requests/e621.rb b/app/logical/requests/e621.rb
index 6ac6d9f..8a3a2d3 100644
--- a/app/logical/requests/e621.rb
+++ b/app/logical/requests/e621.rb
@@ -5,15 +5,19 @@ module Requests
     include HTTParty
     base_uri "https://e621.net"
 
+    def options
+      opt = Websites.config.httparty_options
+      opt[:headers]["Authorization"] = "Basic #{Base64.strict_encode64("#{Websites.config.e621_username}:#{Websites.config.e621_apikey}")}" if Websites.config.e621_username.present? && Websites.config.e621_apikey.present?
+      opt
+    end
+
     def status
-      r = self.class.get("/posts.json?limit=0", {
-        **Websites.config.httparty_options,
+      r = self.class.get("/posts.json?limit=0", options.deep_merge({
         headers: {
-          **Websites.config.http_headers,
           "User-Agent" => "E621Status/1.0.0 (https://status.e621.ws; \"donovan_dmc\")",
         },
         timeout: 5,
-      })
+      }))
       status = r.code
       if r.code == 503 && r.headers["Content-Type"]&.start_with?("text/html")
         status = 1
@@ -35,11 +39,28 @@ module Requests
       path = "/"
       path = "/posts/#{id}.json" if id
       path = "/posts.json?md5=#{md5}" if md5
-      r = self.class.get(path, Websites.config.httparty_options)
+      r = self.class.get(path, options)
       return nil if r.code != 200
       JSON.parse(r.body)["post"]
     end
 
+    def get_posts_by_tags(tags:, limit: 100, page: 1)
+      path = "/posts.json?tags=#{tags}&limit=#{limit}&page=#{page}"
+      r = self.class.get(path, options)
+      JSON.parse(r.body)["posts"] || []
+    end
+
+    def get_all_posts_by_tags(tags:)
+      posts = []
+      page = 1
+      loop do
+        posts += p = get_posts_by_tags(tags: tags, limit: 320, page: page)
+        break if p.length < 320
+        page += 1
+      end
+      posts
+    end
+
     def get_posts(ids: nil, md5s: nil, status: nil)
       raise(ArgumentError, "ids or md5s must be given") if ids.nil? && md5s.nil?
       path = "/posts.json?"
@@ -48,7 +69,7 @@ module Requests
       path += "%20status:#{status}" if path.include?("tags=") && !status.nil?
       path += "tags=status:#{status}" if !path.include?("tags=") && !status.nil?
       Rails.logger.info("Fetching posts from e621: #{path}") if Rails.env.development?
-      r = self.class.get(path, Websites.config.httparty_options)
+      r = self.class.get(path, options)
       JSON.parse(r.body)["posts"] || []
     end
 
@@ -70,7 +91,7 @@ module Requests
     end
 
     def find_replacement(md5:)
-      r = self.class.get("/post_replacements.json?search[md5]=#{md5}", Websites.config.httparty_options)
+      r = self.class.get("/post_replacements.json?search[md5]=#{md5}", options)
       JSON.parse(r.body)&.first
     end
 
@@ -89,5 +110,17 @@ module Requests
     def self.get_all_posts(**)
       new.get_all_posts(**)
     end
+
+    def self.get_posts_by_tags(**)
+      new.get_posts_by_tags(**)
+    end
+
+    def self.get_all_posts_by_tags(**)
+      new.get_all_posts_by_tags(**)
+    end
+
+    def self.find_replacement(**)
+      new.find_replacement(**)
+    end
   end
 end
diff --git a/config/default_config.rb b/config/default_config.rb
index 2324f37..6aa615f 100644
--- a/config/default_config.rb
+++ b/config/default_config.rb
@@ -254,6 +254,12 @@ module Websites
         base_url:          yiffy2_cdn_url,
       )
     end
+
+    def e621_username
+    end
+
+    def e621_apikey
+    end
   end
 
   class EnvironmentConfiguration