diff --git a/packages/react-api/src/Api.tsx b/packages/react-api/src/Api.tsx
index 7c10217..1eefe1c 100644
--- a/packages/react-api/src/Api.tsx
+++ b/packages/react-api/src/Api.tsx
@@ -280,10 +280,19 @@ async function createApi (apiUrl: string, signer: ApiSigner, isLocalFork: boolea
       provider = new WsProvider(apiUrl);
     }
 
+    // PezkuwiChain requires AuthorizeCall signed extension for all transactions
+    const pezkuwiSignedExtensions = {
+      AuthorizeCall: {
+        extrinsic: {},
+        payload: {}
+      }
+    };
+
     statics.api = new ApiPromise({
       provider,
       registry: statics.registry,
       signer,
+      signedExtensions: pezkuwiSignedExtensions,
       types,
       typesBundle
     });
diff --git a/packages/react-hooks/src/ctx/StakingAsync.tsx b/packages/react-hooks/src/ctx/StakingAsync.tsx
index 5a474b2..d22bfca 100644
--- a/packages/react-hooks/src/ctx/StakingAsync.tsx
+++ b/packages/react-hooks/src/ctx/StakingAsync.tsx
@@ -12,9 +12,18 @@ import { useApi } from '@pezkuwi/react-hooks';
 
 const allEndPoints = createWsEndpoints((k, v) => v?.toString() || k);
 
+// PezkuwiChain requires AuthorizeCall signed extension for all transactions
+const PEZKUWI_SIGNED_EXTENSIONS = {
+  AuthorizeCall: {
+    extrinsic: {},
+    payload: {}
+  }
+};
+
 export const getApi = async (url: string[]|string) => {
   const api = await ApiPromise.create({
-    provider: new WsProvider(url)
+    provider: new WsProvider(url),
+    signedExtensions: PEZKUWI_SIGNED_EXTENSIONS
   });
 
   await api.isReadyOrError;
diff --git a/packages/test-support/src/api/createApi.ts b/packages/test-support/src/api/createApi.ts
index e4be3f8..50fdd2d 100644
--- a/packages/test-support/src/api/createApi.ts
+++ b/packages/test-support/src/api/createApi.ts
@@ -6,12 +6,23 @@ import { WsProvider } from '@pezkuwi/rpc-provider';
 
 import { BIZINIKIWI_PORT } from '../bizinikiwi/index.js';
 
+// PezkuwiChain requires AuthorizeCall signed extension for all transactions
+const PEZKUWI_SIGNED_EXTENSIONS = {
+  AuthorizeCall: {
+    extrinsic: {},
+    payload: {}
+  }
+};
+
 export async function createApi (port: number = BIZINIKIWI_PORT): Promise<ApiPromise> {
   process.env.NODE_ENV = 'test';
 
   const provider = new WsProvider(`ws://127.0.0.1:${port}`);
 
-  const api = await ApiPromise.create({ provider });
+  const api = await ApiPromise.create({
+    provider,
+    signedExtensions: PEZKUWI_SIGNED_EXTENSIONS
+  });
 
   const [chain, nodeName, nodeVersion] = await Promise.all([
     api.rpc.system.chain(),
diff --git a/packages/test-support/src/api/createAugmentedApi.ts b/packages/test-support/src/api/createAugmentedApi.ts
index 1707ff4..0937829 100644
--- a/packages/test-support/src/api/createAugmentedApi.ts
+++ b/packages/test-support/src/api/createAugmentedApi.ts
@@ -7,6 +7,14 @@ import { ApiPromise, WsProvider } from '@pezkuwi/api';
 import { Metadata, TypeRegistry } from '@pezkuwi/types';
 import metaStatic from '@pezkuwi/types-support/metadata/static-bizinikiwi';
 
+// PezkuwiChain requires AuthorizeCall signed extension for all transactions
+const PEZKUWI_SIGNED_EXTENSIONS = {
+  AuthorizeCall: {
+    extrinsic: {},
+    payload: {}
+  }
+};
+
 export function createAugmentedApi (): ApiPromise {
   const registry = new TypeRegistry();
   // FIXME - ref: https://github.com/pezkuwichain/pezkuwi-apps/pull/11051
@@ -16,7 +24,11 @@ export function createAugmentedApi (): ApiPromise {
 
   registry.setMetadata(metadata);
 
-  const api = new ApiPromise({ provider: new WsProvider('ws://', false), registry: registry as unknown as Registry });
+  const api = new ApiPromise({
+    provider: new WsProvider('ws://', false),
+    registry: registry as unknown as Registry,
+    signedExtensions: PEZKUWI_SIGNED_EXTENSIONS
+  });
 
   // eslint-disable-next-line deprecation/deprecation
   api.injectMetadata(metadata, true);