diff --git a/etc/firebase-admin.remote-config.api.md b/etc/firebase-admin.remote-config.api.md
index 1a19d1bb6c..675fdf54a3 100644
--- a/etc/firebase-admin.remote-config.api.md
+++ b/etc/firebase-admin.remote-config.api.md
@@ -55,6 +55,7 @@ export interface ExperimentParameterValue {
 // @public
 export interface ExperimentValue {
     experimentId: string;
+    exposurePercent?: number;
     variantValue: ExperimentVariantValue[];
 }
 
diff --git a/src/remote-config/remote-config-api.ts b/src/remote-config/remote-config-api.ts
index 6566fe231e..0f2648d797 100644
--- a/src/remote-config/remote-config-api.ts
+++ b/src/remote-config/remote-config-api.ts
@@ -451,6 +451,12 @@ export interface ExperimentValue {
    * served by the Experiment.
    */
   variantValue: ExperimentVariantValue[];
+
+  /**
+   * The percentage of users included in the Experiment, represented as a number
+   * between 0 and 100.
+   */
+  exposurePercent?: number;
 }
 
 /**
diff --git a/test/unit/remote-config/remote-config.spec.ts b/test/unit/remote-config/remote-config.spec.ts
index 74d277290e..a4c04119cc 100644
--- a/test/unit/remote-config/remote-config.spec.ts
+++ b/test/unit/remote-config/remote-config.spec.ts
@@ -134,7 +134,8 @@ describe('RemoteConfig', () => {
               variantValue: [
                 { variantId: 'variant_A', value: 'true' },
                 { variantId: 'variant_B', noChange: true }
-              ]
+              ],
+              exposurePercent: 25,
             }
           }
         },
@@ -233,7 +234,8 @@ describe('RemoteConfig', () => {
               variantValue: [
                 { variantId: 'variant_A', value: 'true' },
                 { variantId: 'variant_B', noChange: true }
-              ]
+              ],
+              exposurePercent: 25,
             }
           }
         },
@@ -652,6 +654,7 @@ describe('RemoteConfig', () => {
       expect(p4.conditionalValues).to.not.be.undefined;
       const experimentParam = p4.conditionalValues!['ios'] as ExperimentParameterValue;
       expect(experimentParam.experimentValue.experimentId).to.equal('experiment_1');
+      expect(experimentParam.experimentValue.exposurePercent).to.equal(25);
       expect(experimentParam.experimentValue.variantValue.length).to.equal(2);
       expect(experimentParam.experimentValue.variantValue[0]).to.deep.equal({ variantId: 'variant_A', value: 'true' });
       expect(experimentParam.experimentValue.variantValue[1]).to.deep.equal({ variantId: 'variant_B', noChange: true });