diff --git a/packages/apps-config/src/api/spec/bulletin.ts b/packages/apps-config/src/api/spec/bulletin.ts
new file mode 100644
index 0000000000..c906121c36
--- /dev/null
+++ b/packages/apps-config/src/api/spec/bulletin.ts
@@ -0,0 +1,33 @@
+// Copyright 2017-2026 @polkadot/apps-config authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { OverrideBundleDefinition } from '@polkadot/types/types';
+
+/* eslint-disable sort-keys */
+
+const definitions: OverrideBundleDefinition = {
+  types: [
+    {
+      minmax: [0, undefined],
+      types: {
+        HashingAlgorithm: {
+          _enum: ['Blake2b256', 'Sha2_256', 'Keccak256']
+        },
+        CidConfig: {
+          codec: 'u64',
+          hashing: 'HashingAlgorithm'
+        }
+      }
+    }
+  ],
+  signedExtensions: {
+    ProvideCidConfig: {
+      extrinsic: {
+        cidConfig: 'Option<CidConfig>'
+      },
+      payload: {}
+    }
+  }
+};
+
+export default definitions;
diff --git a/packages/apps-config/src/api/spec/index.ts b/packages/apps-config/src/api/spec/index.ts
index 8e6dcb09ba..1f016af304 100644
--- a/packages/apps-config/src/api/spec/index.ts
+++ b/packages/apps-config/src/api/spec/index.ts
@@ -21,6 +21,7 @@ import bitcountry from './bitcountry.js';
 import bitcountryPioneer from './bitcountry-pioneer.js';
 import bitcountryParachain from './bitcountry-rococo.js';
 import bittensor from './bittensor.js';
+import bulletin from './bulletin.js';
 import centrifuge from './centrifuge.js';
 import centrifugeChain from './centrifuge-chain.js';
 import chainx from './chainx.js';
@@ -168,6 +169,8 @@ const spec: Record<string, OverrideBundleDefinition> = {
   'bitcountry-node': bitcountry,
   'bitcountry-parachain': bitcountryParachain,
   bittensor,
+  'bulletin-polkadot': bulletin,
+  'bulletin-westend': bulletin,
   centrifuge,
   'centrifuge-chain': centrifugeChain,
   chainx,
diff --git a/packages/apps-config/src/api/typesBundle.ts b/packages/apps-config/src/api/typesBundle.ts
index 8454067fcb..f5ed2ac6b2 100644
--- a/packages/apps-config/src/api/typesBundle.ts
+++ b/packages/apps-config/src/api/typesBundle.ts
@@ -20307,6 +20307,68 @@ export const typesBundle = {
         }
       ]
     },
+    "bulletin-polkadot": {
+      "types": [
+        {
+          "minmax": [
+            0,
+            null
+          ],
+          "types": {
+            "HashingAlgorithm": {
+              "_enum": [
+                "Blake2b256",
+                "Sha2_256",
+                "Keccak256"
+              ]
+            },
+            "CidConfig": {
+              "codec": "u64",
+              "hashing": "HashingAlgorithm"
+            }
+          }
+        }
+      ],
+      "signedExtensions": {
+        "ProvideCidConfig": {
+          "extrinsic": {
+            "cidConfig": "Option<CidConfig>"
+          },
+          "payload": {}
+        }
+      }
+    },
+    "bulletin-westend": {
+      "types": [
+        {
+          "minmax": [
+            0,
+            null
+          ],
+          "types": {
+            "HashingAlgorithm": {
+              "_enum": [
+                "Blake2b256",
+                "Sha2_256",
+                "Keccak256"
+              ]
+            },
+            "CidConfig": {
+              "codec": "u64",
+              "hashing": "HashingAlgorithm"
+            }
+          }
+        }
+      ],
+      "signedExtensions": {
+        "ProvideCidConfig": {
+          "extrinsic": {
+            "cidConfig": "Option<CidConfig>"
+          },
+          "payload": {}
+        }
+      }
+    },
     "centrifuge": {
       "types": [
         {