diff --git a/backend/src/api/start.ts b/backend/src/api/start.ts
index 7d046c12..b4eed63b 100644
--- a/backend/src/api/start.ts
+++ b/backend/src/api/start.ts
@@ -6,6 +6,7 @@ import { initAuth } from "./auth";
 import { initDocs } from "./docs";
 import { initGuildsAPI } from "./guilds";
 import { clientError, error, notFound } from "./responses";
+import { startBackgroundTasks } from "./tasks";
 
 const app = express();
 
@@ -47,3 +48,5 @@ app.use((req, res, next) => {
 
 const port = (process.env.PORT && parseInt(process.env.PORT, 10)) || 3000;
 app.listen(port, "0.0.0.0", () => console.log(`API server listening on port ${port}`)); // tslint:disable-line
+
+startBackgroundTasks();
diff --git a/backend/src/api/tasks.ts b/backend/src/api/tasks.ts
new file mode 100644
index 00000000..6edf218d
--- /dev/null
+++ b/backend/src/api/tasks.ts
@@ -0,0 +1,10 @@
+import { ApiPermissionAssignments } from "../data/ApiPermissionAssignments";
+import { MINUTES } from "../utils";
+
+export function startBackgroundTasks() {
+  // Clear expired API permissions every minute
+  const apiPermissions = new ApiPermissionAssignments();
+  setInterval(() => {
+    apiPermissions.clearExpiredPermissions();
+  }, 1 * MINUTES);
+}
diff --git a/backend/src/data/ApiPermissionAssignments.ts b/backend/src/data/ApiPermissionAssignments.ts
index 29686adc..fc04b61c 100644
--- a/backend/src/data/ApiPermissionAssignments.ts
+++ b/backend/src/data/ApiPermissionAssignments.ts
@@ -55,4 +55,12 @@ export class ApiPermissionAssignments extends BaseRepository {
   removeUser(guildId, userId) {
     return this.apiPermissions.delete({ guild_id: guildId, type: ApiPermissionTypes.User, target_id: userId });
   }
+
+  async clearExpiredPermissions() {
+    await this.apiPermissions
+      .createQueryBuilder()
+      .where("expires_at IS NOT NULL")
+      .andWhere("expires_at <= NOW()")
+      .delete();
+  }
 }
diff --git a/backend/src/data/entities/ApiPermissionAssignment.ts b/backend/src/data/entities/ApiPermissionAssignment.ts
index fcea7595..454fe17c 100644
--- a/backend/src/data/entities/ApiPermissionAssignment.ts
+++ b/backend/src/data/entities/ApiPermissionAssignment.ts
@@ -18,6 +18,9 @@ export class ApiPermissionAssignment {
   @Column("simple-array")
   permissions: string[];
 
+  @Column()
+  expires_at: string;
+
   @ManyToOne(
     type => ApiUserInfo,
     userInfo => userInfo.permissionAssignments,
diff --git a/backend/src/migrations/1630837386329-AddExpiresAtToApiPermissions.ts b/backend/src/migrations/1630837386329-AddExpiresAtToApiPermissions.ts
new file mode 100644
index 00000000..3eb6ea27
--- /dev/null
+++ b/backend/src/migrations/1630837386329-AddExpiresAtToApiPermissions.ts
@@ -0,0 +1,18 @@
+import { MigrationInterface, QueryRunner, TableColumn } from "typeorm";
+
+export class AddExpiresAtToApiPermissions1630837386329 implements MigrationInterface {
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.addColumns("api_permissions", [
+      new TableColumn({
+        name: "expires_at",
+        type: "boolean",
+        isNullable: true,
+        default: null,
+      }),
+    ]);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.dropColumn("api_permissions", "expires_at");
+  }
+}