diff --git a/lib/types/crypto-types.js b/lib/types/crypto-types.js
--- a/lib/types/crypto-types.js
+++ b/lib/types/crypto-types.js
@@ -121,3 +121,9 @@
   PREKEY: 0,
   TEXT: 1,
 });
+
+export type OlmAPI = {
+  +initializeCryptoAccount: () => Promise<void>,
+  +encrypt: (content: string, deviceID: string) => Promise<string>,
+  +decrypt: (encryptedContent: string, deviceID: string) => Promise<string>,
+};
diff --git a/lib/utils/config.js b/lib/utils/config.js
--- a/lib/utils/config.js
+++ b/lib/utils/config.js
@@ -9,6 +9,7 @@
 } from '../keyserver-conn/keyserver-conn-types.js';
 import type { InitialNotifMessageOptions } from '../shared/crypto-utils.js';
 import type { LogInActionSource } from '../types/account-types.js';
+import type { OlmAPI } from '../types/crypto-types.js';
 import type { PlatformDetails } from '../types/device-types.js';
 
 export type Config = {
@@ -27,6 +28,7 @@
   +calendarRangeInactivityLimit: ?number,
   +platformDetails: PlatformDetails,
   +authoritativeKeyserverID: string,
+  +olmAPI: OlmAPI,
 };
 
 let registeredConfig: ?Config = null;
diff --git a/native/config.js b/native/config.js
--- a/native/config.js
+++ b/native/config.js
@@ -6,6 +6,7 @@
 
 import { resolveKeyserverSessionInvalidationUsingNativeCredentials } from './account/legacy-recover-keyserver-session.js';
 import { authoritativeKeyserverID } from './authoritative-keyserver.js';
+import { olmAPI } from './crypto/olm-api.js';
 import { persistConfig, codeVersion } from './redux/persist.js';
 
 registerConfig({
@@ -18,4 +19,5 @@
     stateVersion: persistConfig.version,
   },
   authoritativeKeyserverID,
+  olmAPI,
 });
diff --git a/native/crypto/olm-api.js b/native/crypto/olm-api.js
new file mode 100644
--- /dev/null
+++ b/native/crypto/olm-api.js
@@ -0,0 +1,15 @@
+// @flow
+
+import type { OlmAPI } from 'lib/types/crypto-types';
+
+import { commCoreModule } from '../native-modules.js';
+
+const olmAPI: OlmAPI = {
+  async initializeCryptoAccount(): Promise<void> {
+    await commCoreModule.initializeCryptoAccount();
+  },
+  encrypt: commCoreModule.encrypt,
+  decrypt: commCoreModule.decrypt,
+};
+
+export { olmAPI };
diff --git a/web/app.react.js b/web/app.react.js
--- a/web/app.react.js
+++ b/web/app.react.js
@@ -45,6 +45,7 @@
 import { EditModalProvider } from './chat/edit-message-provider.js';
 import { MemberListSidebarProvider } from './chat/member-list-sidebar/member-list-sidebar-provider.react.js';
 import NavigationArrows from './components/navigation-arrows.react.js';
+import { olmAPI } from './crypto/olm-api.js';
 import { initOpaque } from './crypto/opaque-utils.js';
 import { getDatabaseModule } from './database/database-module-provider.js';
 import electron from './electron.js';
@@ -104,6 +105,7 @@
     ...desktopDetails,
   },
   authoritativeKeyserverID,
+  olmAPI,
 });
 
 const versionBroadcast = new BroadcastChannel('comm_version');
diff --git a/web/crypto/olm-api.js b/web/crypto/olm-api.js
new file mode 100644
--- /dev/null
+++ b/web/crypto/olm-api.js
@@ -0,0 +1,47 @@
+// @flow
+
+import olm from '@commapp/olm';
+import type { Account, Session } from '@commapp/olm';
+
+import {
+  type OlmAPI,
+  olmEncryptedMessageTypes,
+} from 'lib/types/crypto-types.js';
+
+// methods below are just mocks to SQLite API
+// implement proper methods tracked in ENG-6462
+// eslint-disable-next-line no-unused-vars
+function getOlmAccount(): Account {
+  return new olm.Account();
+}
+// eslint-disable-next-line no-unused-vars
+function getOlmSession(deviceID: string): Session {
+  return new olm.Session();
+}
+// eslint-disable-next-line no-unused-vars
+function storeOlmAccount(account: Account): void {}
+// eslint-disable-next-line no-unused-vars
+function storeOlmSession(session: Session): void {}
+
+const olmAPI: OlmAPI = {
+  async initializeCryptoAccount(): Promise<void> {
+    await olm.init();
+  },
+  async encrypt(content: string, deviceID: string): Promise<string> {
+    const session = getOlmSession(deviceID);
+    const { body } = session.encrypt(content);
+    storeOlmSession(session);
+    return body;
+  },
+  async decrypt(encryptedContent: string, deviceID: string): Promise<string> {
+    const session = getOlmSession(deviceID);
+    const result = session.decrypt(
+      olmEncryptedMessageTypes.TEXT,
+      encryptedContent,
+    );
+    storeOlmSession(session);
+    return result;
+  },
+};
+
+export { olmAPI };