diff --git a/lib/greenhouse_io/api.rb b/lib/greenhouse_io/api.rb
index ec521de..6aca5e1 100644
--- a/lib/greenhouse_io/api.rb
+++ b/lib/greenhouse_io/api.rb
@@ -8,6 +8,14 @@ def post_response(url, options)
       self.class.post(url, options)
     end
 
+    def patch_response(url, options)
+      self.class.patch(url, options)
+    end
+
+    def delete_response(url, options)
+      self.class.delete(url, options)
+    end
+
     def parse_json(response)
       JSON.parse(response.body, symbolize_names: GreenhouseIo.configuration.symbolize_keys)
     end
diff --git a/lib/greenhouse_io/api/client.rb b/lib/greenhouse_io/api/client.rb
index 453d52d..7dd2ff0 100644
--- a/lib/greenhouse_io/api/client.rb
+++ b/lib/greenhouse_io/api/client.rb
@@ -32,6 +32,19 @@ def activity_feed(id, options = {})
       get_from_harvest_api "/candidates/#{id}/activity_feed", options
     end
 
+    def create_candidate(candidate_hash, on_behalf_of)
+      post_to_harvest_api \
+        "/candidates",
+        candidate_hash,
+        { 'On-Behalf-Of' => on_behalf_of.to_s }
+    end
+
+    def delete_candidate(candidate_id, on_behalf_of)
+      delete_with_harvest_api \
+        "/candidates/#{candidate_id}",
+        { 'On-Behalf-Of' => on_behalf_of.to_s }
+    end
+
     def create_candidate_note(candidate_id, note_hash, on_behalf_of)
       post_to_harvest_api(
         "/candidates/#{candidate_id}/activity_feed/notes",
@@ -96,7 +109,7 @@ def permitted_options(options)
 
     def get_from_harvest_api(url, options = {})
       response = get_response(url, {
-        :query => permitted_options(options), 
+        :query => permitted_options(options),
         :basic_auth => basic_auth
       })
 
@@ -105,7 +118,7 @@ def get_from_harvest_api(url, options = {})
       if response.code == 200
         parse_json(response)
       else
-        raise GreenhouseIo::Error.new(response.code)
+        raise GreenhouseIo::Error.new("Response code: #{response.code}, message: #{response.body}")
       end
     end
 
@@ -120,8 +133,45 @@ def post_to_harvest_api(url, body, headers)
 
       if response.code == 200
         parse_json(response)
+      elsif response.code == 201
+        parse_json(response)
+      else
+        raise GreenhouseIo::Error.new("Response code: #{response.code}, message: #{response.body}")
+      end
+    end
+
+    def patch_with_harvest_api(url, body, headers)
+      response = patch_response(url, {
+        :body => JSON.dump(body),
+        :basic_auth => basic_auth,
+        :headers => headers
+      })
+
+      set_headers_info(response.headers)
+
+      if response.code == 200
+        parse_json(response)
+      elsif response.code == 201
+        parse_json(response)
+      else
+        raise GreenhouseIo::Error.new("Response code: #{response.code}, message: #{response.body}")
+      end
+    end
+
+    def delete_with_harvest_api(url, headers)
+      response = delete_response(url, {
+        :basic_auth => basic_auth,
+        :headers => headers
+      })
+
+      set_headers_info(response.headers)
+
+      if response.code == 200
+        parse_json(response)
+      elsif response.code == 201
+        parse_json(response)
       else
-        raise GreenhouseIo::Error.new(response.code)
+        raise GreenhouseIo::Error.new("Response code: #{response.code}, message: #{response.body}")
       end
     end