diff --git a/keyserver/src/utils/redis-cache.js b/keyserver/src/utils/redis-cache.js
--- a/keyserver/src/utils/redis-cache.js
+++ b/keyserver/src/utils/redis-cache.js
@@ -4,6 +4,7 @@
 import redis from 'redis';
 
 import type { NeynarChannel } from 'lib/types/farcaster-types.js';
+import type { Identity } from 'lib/types/identity-service-types.js';
 
 import { redisConfig } from '../socket/redis.js';
 
@@ -44,6 +45,37 @@
       });
     });
   }
+
+  setUserIdentity(userID: string, userIdentity: Identity): Promise<void> {
+    const stringifiedUserIdentity = JSON.stringify(userIdentity);
+    return new Promise((resolve, reject) => {
+      this.cacheClient.set(
+        `user:${userID}`,
+        stringifiedUserIdentity,
+        'EX',
+        60, // item expires after 1 minute
+        err => {
+          if (err) {
+            return reject(err);
+          }
+          return resolve();
+        },
+      );
+    });
+  }
+
+  getUserIdentity(userID: string): Promise<?Identity> {
+    return new Promise((resolve, reject) => {
+      this.cacheClient.get(`user:${userID}`, (err, result) => {
+        if (err) {
+          return reject(err);
+        }
+        // Reset the expiration when the cached data is successfully retrieved
+        this.cacheClient.expire(`user:${userID}`, 60);
+        return resolve(result ? JSON.parse(result) : null);
+      });
+    });
+  }
 }
 
 const redisCache: RedisCache = new RedisCache();