diff --git a/server/src/schema/mutations/AddPrizeToCompetition.js b/server/src/schema/mutations/AddPrizeToCompetition.js
new file mode 100644
index 000000000..194141ea7
--- /dev/null
+++ b/server/src/schema/mutations/AddPrizeToCompetition.js
@@ -0,0 +1,50 @@
+import {
+  GraphQLNonNull,
+  GraphQLID,
+  GraphQLInt,
+  GraphQLString
+} from 'graphql'
+import { CompetitionType } from '../types'
+import Competition from '../../models/competition'
+
+const args = {
+  codeName: { type: new GraphQLNonNull(GraphQLID) },
+  position: { type: new GraphQLNonNull(GraphQLInt) },
+  algoPrize: { type: new GraphQLNonNull(GraphQLString) }
+}
+
+const resolve = (parent, { codeName, position, algoPrize }, context) => {
+  // let authIdOnSession = context.user.sub
+  return new Promise((resolve, reject) => {
+    Competition.findOne({ codeName }).exec((err, competition) => {
+      if (err) reject(err)
+      else {
+        if (competition.prizes.some(prize => prize.position === position)) {
+          // need to add an error message here TODO
+          resolve(competition)
+        } else {
+          competition.prizes.push({
+            position,
+            algoPrize
+          })
+          competition.save((err) => {
+            if (err) reject(err)
+            else {
+              resolve(competition)
+            }
+          })
+        }
+      }
+    })
+  })
+}
+
+const mutation = {
+  addPrizeToCompetition: {
+    type: CompetitionType,
+    args,
+    resolve
+  }
+}
+
+export default mutation
diff --git a/server/src/schema/mutations/index.js b/server/src/schema/mutations/index.js
index 6c076c8b9..fc37f8426 100644
--- a/server/src/schema/mutations/index.js
+++ b/server/src/schema/mutations/index.js
@@ -8,6 +8,7 @@ import RegisterToCompetitionMutation from './RegisterToCompetition'
 import EditParticipantOfCompetitionMutation from './EditParticipantOfCompetition'
 import AddRuleToCompetitionMutation from './AddRuleToCompetition'
 import EditRuleOfCompetitionMutation from './EditRuleOfCompetition'
+import AddPrizeToCompetitionMutation from './AddPrizeToCompetition'
 
 const Mutation = new GraphQLObjectType({
   name: 'Mutation',
@@ -17,7 +18,8 @@ const Mutation = new GraphQLObjectType({
     RegisterToCompetitionMutation,
     EditParticipantOfCompetitionMutation,
     AddRuleToCompetitionMutation,
-    EditRuleOfCompetitionMutation
+    EditRuleOfCompetitionMutation,
+    AddPrizeToCompetitionMutation
   )
 })