diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5c13072a62..e4788966b2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,9 +5,10 @@
 Changes:
 
 - Add `derive.chain.subscribeFinalized{Heads, Blocks}` which returns all finalized, no skips
-- Support Moonbeam author extraction on `derive.chain.*` (w/ shared logic extraction)
-- Cater for `BlockBuilder 2/3/4` & `GrandpaApi 2` runtime interface definitions
+- Support Moonbeam author extraction on `derive.chain.*` (w/ shared logic dedupe)
+- Cater for older `BlockBuilder 2/3/4` & `GrandpaApi 2` runtime interface definitions
 - Support for `NominationPoolsApi` runtime interface
+- Support for `NimbusApi` runtime interface (& older `AuthorFilterAPI`)
 - Add Kusama 9250 upgrade block
 
 
diff --git a/packages/types/src/interfaces/definitions.ts b/packages/types/src/interfaces/definitions.ts
index 696b637487..77269a987a 100644
--- a/packages/types/src/interfaces/definitions.ts
+++ b/packages/types/src/interfaces/definitions.ts
@@ -64,7 +64,8 @@ export { default as xcm } from './xcm/definitions';
 export { default as contractsAbi } from './contractsAbi/definitions';
 export { default as eth } from './eth/definitions';
 
-// orml definitions
+// additional known/community definitions
+export { default as nimbus } from './nimbus/definitions';
 export { default as ormlOracle } from './ormlOracle/definitions';
 export { default as ormlTokens } from './ormlTokens/definitions';
 
diff --git a/packages/types/src/interfaces/nimbus/definitions.ts b/packages/types/src/interfaces/nimbus/definitions.ts
new file mode 100644
index 0000000000..cf1b866912
--- /dev/null
+++ b/packages/types/src/interfaces/nimbus/definitions.ts
@@ -0,0 +1,15 @@
+// Copyright 2017-2022 @polkadot/types authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+// order important in structs... :)
+/* eslint-disable sort-keys */
+
+import type { Definitions } from '../../types';
+
+import { runtime } from './runtime';
+
+export default {
+  rpc: {},
+  runtime,
+  types: {}
+} as Definitions;
diff --git a/packages/types/src/interfaces/nimbus/index.ts b/packages/types/src/interfaces/nimbus/index.ts
new file mode 100644
index 0000000000..2d307291c3
--- /dev/null
+++ b/packages/types/src/interfaces/nimbus/index.ts
@@ -0,0 +1,4 @@
+// Auto-generated via `yarn polkadot-types-from-defs`, do not edit
+/* eslint-disable */
+
+export * from './types';
diff --git a/packages/types/src/interfaces/nimbus/runtime.ts b/packages/types/src/interfaces/nimbus/runtime.ts
new file mode 100644
index 0000000000..95f68f1101
--- /dev/null
+++ b/packages/types/src/interfaces/nimbus/runtime.ts
@@ -0,0 +1,77 @@
+// Copyright 2017-2022 @polkadot/types authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { DefinitionsCall } from '../../types';
+
+export const runtime: DefinitionsCall = {
+  // deprecated, the NimbusApi is current - this is for backwards compat
+  AuthorFilterAPI: [
+    {
+      methods: {
+        can_author: {
+          description: 'The runtime api used to predict whether an author will be eligible in the given slot',
+          params: [
+            {
+              name: 'author',
+              type: 'AccountId'
+            },
+            {
+              name: 'relayParent',
+              type: 'u32'
+            },
+            {
+              name: 'parentHeader',
+              type: 'Header'
+            }
+          ],
+          type: 'bool'
+        }
+      },
+      version: 2
+    },
+    {
+      methods: {
+        can_author: {
+          description: 'The runtime api used to predict whether an author will be eligible in the given slot',
+          params: [
+            {
+              name: 'author',
+              type: 'AccountId'
+            },
+            {
+              name: 'relayParent',
+              type: 'u32'
+            }
+          ],
+          type: 'bool'
+        }
+      },
+      version: 1
+    }
+  ],
+  NimbusApi: [
+    {
+      methods: {
+        can_author: {
+          description: 'The runtime api used to predict whether a Nimbus author will be eligible in the given slot',
+          params: [
+            {
+              name: 'author',
+              type: 'AccountId'
+            },
+            {
+              name: 'relayParent',
+              type: 'u32'
+            },
+            {
+              name: 'parentHeader',
+              type: 'Header'
+            }
+          ],
+          type: 'bool'
+        }
+      },
+      version: 1
+    }
+  ]
+};
diff --git a/packages/types/src/interfaces/nimbus/types.ts b/packages/types/src/interfaces/nimbus/types.ts
new file mode 100644
index 0000000000..b7b11e2de3
--- /dev/null
+++ b/packages/types/src/interfaces/nimbus/types.ts
@@ -0,0 +1,4 @@
+// Auto-generated via `yarn polkadot-types-from-defs`, do not edit
+/* eslint-disable */
+
+export type PHANTOM_NIMBUS = 'nimbus';
diff --git a/packages/types/src/interfaces/types.ts b/packages/types/src/interfaces/types.ts
index c06d05dd57..6c934ffee8 100644
--- a/packages/types/src/interfaces/types.ts
+++ b/packages/types/src/interfaces/types.ts
@@ -37,6 +37,7 @@ export * from './identity/types';
 export * from './imOnline/types';
 export * from './lottery/types';
 export * from './mmr/types';
+export * from './nimbus/types';
 export * from './nompools/types';
 export * from './offchain/types';
 export * from './offences/types';