diff --git a/api/src/engine/models/experiment/experiment.model.ts b/api/src/engine/models/experiment/experiment.model.ts
index 97fca531bc44de2dcd3cb9446a3eb453bc4694ac..6de688fa6ad57fd7fa6c1d49389375373919f145 100644
--- a/api/src/engine/models/experiment/experiment.model.ts
+++ b/api/src/engine/models/experiment/experiment.model.ts
@@ -47,6 +47,9 @@ export class Experiment {
   @Field(() => [String], { nullable: true, defaultValue: [] })
   coVariables?: string[];
 
+  @Field(() => [String], { nullable: true, defaultValue: [] })
+  filterVariables?: string[];
+
   @Field()
   algorithm: Algorithm;
 
diff --git a/api/src/schema.gql b/api/src/schema.gql
index 33ba8eafeaa512b7de549cd0ad12ce620b6d533c..c31b047f68f45070441ff0704a28f332145fe14e 100644
--- a/api/src/schema.gql
+++ b/api/src/schema.gql
@@ -146,6 +146,7 @@ type Experiment {
   domain: String!
   variables: [String!]!
   coVariables: [String!]
+  filterVariables: [String!]
   algorithm: Algorithm!
   name: String!
 }
@@ -165,6 +166,7 @@ type PartialExperiment {
   domain: String
   variables: [String!]
   coVariables: [String!]
+  filterVariables: [String!]
   algorithm: Algorithm
   name: String
 }