diff --git a/packages/apps-config/src/api/chain/crust-maxwell.ts b/packages/apps-config/src/api/chain/crust-maxwell.ts
deleted file mode 100644
index 7b6bcb3303..0000000000
--- a/packages/apps-config/src/api/chain/crust-maxwell.ts
+++ /dev/null
@@ -1,103 +0,0 @@
-// Copyright 2017-2022 @polkadot/apps-config authors & contributors
-// SPDX-License-Identifier: Apache-2.0
-
-// structs need to be in order
-/* eslint-disable sort-keys */
-
-export default {
-  AccountInfo: 'AccountInfoWithProviders',
-  Address: 'AccountId',
-  AddressInfo: 'Vec<u8>',
-  LookupSource: 'AccountId',
-  EraBenefits: {
-    total_benefits: 'Balance',
-    total_funds: 'Balance',
-    used_benefits: 'Balance',
-    active_era: 'EraIndex'
-  },
-  FeeReductionBenefit: {
-    funds: 'Balance',
-    total_fee_reduction_count: 'u32',
-    used_fee_reduction_quota: 'Balance',
-    used_fee_reduction_count: 'u32',
-    refreshed_at: 'EraIndex'
-  },
-  CsmBalance: 'Balance',
-  CsmBalanceOf: 'Balance',
-  ETHAddress: 'Vec<u8>',
-  EthereumTxHash: 'H256',
-  CSMLedger: {
-    total: 'Compact<Balance>',
-    active: 'Compact<Balance>',
-    unlocking: 'Vec<CSMUnlockChunk<Balance>>'
-  },
-  CSMUnlockChunk: {
-    value: 'Compact<Balance>',
-    bn: 'Compact<BlockNumber>'
-  },
-  FileInfo: {
-    file_size: 'u64',
-    expired_on: 'BlockNumber',
-    calculated_at: 'BlockNumber',
-    amount: 'Balance',
-    prepaid: 'Balance',
-    reported_replica_count: 'u32',
-    replicas: 'Vec<Replica<AccountId>>'
-  },
-  MerchantLedger: {
-    reward: 'Balance',
-    collateral: 'Balance'
-  },
-  Releases: {
-    _enum: ['V1_0_0', 'V2_0_0']
-  },
-  Replica: {
-    who: 'AccountId',
-    valid_at: 'BlockNumber',
-    anchor: 'SworkerAnchor',
-    is_reported: 'bool'
-  },
-  Status: {
-    _enum: ['Free', 'Reserved']
-  },
-  UsedInfo: {
-    used_size: 'u64',
-    reported_group_count: 'u32',
-    groups: 'BTreeMap<SworkerAnchor, bool>'
-  },
-  Guarantee: {
-    targets: 'Vec<IndividualExposure<AccountId, Balance>>',
-    total: 'Compact<Balance>',
-    submitted_in: 'EraIndex',
-    suppressed: 'bool'
-  },
-  ValidatorPrefs: {
-    guarantee_fee: 'Compact<Perbill>'
-  },
-  IASSig: 'Vec<u8>',
-  Identity: {
-    anchor: 'SworkerAnchor',
-    punishment_deadline: 'u64',
-    group: 'Option<AccountId>'
-  },
-  ISVBody: 'Vec<u8>',
-  MerkleRoot: 'Vec<u8>',
-  ReportSlot: 'u64',
-  PKInfo: {
-    code: 'SworkerCode',
-    anchor: 'Option<SworkerAnchor>'
-  },
-  SworkerAnchor: 'Vec<u8>',
-  SworkerCert: 'Vec<u8>',
-  SworkerCode: 'Vec<u8>',
-  SworkerPubKey: 'Vec<u8>',
-  SworkerSignature: 'Vec<u8>',
-  WorkReport: {
-    report_slot: 'u64',
-    used: 'u64',
-    free: 'u64',
-    reported_files_size: 'u64',
-    reported_srd_root: 'MerkleRoot',
-    reported_files_root: 'MerkleRoot'
-  }
-};
diff --git a/packages/apps-config/src/api/chain/index.ts b/packages/apps-config/src/api/chain/index.ts
deleted file mode 100644
index 953798e719..0000000000
--- a/packages/apps-config/src/api/chain/index.ts
+++ /dev/null
@@ -1,12 +0,0 @@
-// Copyright 2017-2022 @polkadot/apps-config authors & contributors
-// SPDX-License-Identifier: Apache-2.0
-
-import { typesChain } from '@phala/typedefs';
-
-import CrustMaxwell from './crust-maxwell';
-
-// alphabetical, based on the actual displayed name
-export default {
-  ...typesChain,
-  'Crust Maxwell': CrustMaxwell
-};
diff --git a/packages/apps-config/src/api/index.ts b/packages/apps-config/src/api/index.ts
index 72953868e1..e69f01bd98 100644
--- a/packages/apps-config/src/api/index.ts
+++ b/packages/apps-config/src/api/index.ts
@@ -3,18 +3,9 @@
 
 import type { OverrideBundleType } from '@polkadot/types/types';
 
-import typesChain from './chain';
 import spec from './spec';
 
 export * from './constants';
 export * from './params';
 
-export function getChainTypes (_specName: string, chainName: string): Record<string, string | Record<string, unknown>> {
-  return {
-    ...(typesChain[chainName as keyof typeof typesChain] || {})
-  };
-}
-
 export const typesBundle: OverrideBundleType = { spec };
-
-export { typesChain };
diff --git a/packages/apps-config/src/ci/runner.ts b/packages/apps-config/src/ci/runner.ts
index 5acec4d253..586f78080f 100644
--- a/packages/apps-config/src/ci/runner.ts
+++ b/packages/apps-config/src/ci/runner.ts
@@ -6,7 +6,7 @@ import fs from 'fs';
 import { ApiPromise, WsProvider } from '@polkadot/api';
 import { assert, isError, isString } from '@polkadot/util';
 
-import { typesBundle, typesChain } from '../api';
+import { typesBundle } from '../api';
 import { createWsEndpoints } from '../endpoints';
 import { fetchJson } from './fetch';
 
@@ -41,8 +41,7 @@ function createChecker (issueFile: string, failures: string[]): (name: string, w
         provider,
         throwOnConnect: true,
         throwOnUnknown: false,
-        typesBundle,
-        typesChain
+        typesBundle
       });
 
       setTimeout((): void => {
diff --git a/packages/react-api/src/Api.tsx b/packages/react-api/src/Api.tsx
index 1e862330c4..eb216a85dd 100644
--- a/packages/react-api/src/Api.tsx
+++ b/packages/react-api/src/Api.tsx
@@ -13,7 +13,7 @@ import store from 'store';
 
 import { ApiPromise, WsProvider } from '@polkadot/api';
 import { deriveMapCache, setDeriveCache } from '@polkadot/api-derive/util';
-import { ethereumChains, typesBundle, typesChain } from '@polkadot/apps-config';
+import { ethereumChains, typesBundle } from '@polkadot/apps-config';
 import { web3Accounts, web3Enable } from '@polkadot/extension-dapp';
 import { TokenUnit } from '@polkadot/react-components/InputNumber';
 import { StatusContext } from '@polkadot/react-components/Status';
@@ -265,8 +265,7 @@ async function createApi (apiUrl: string, signer: ApiSigner, onError: (error: un
       registry,
       signer,
       types,
-      typesBundle,
-      typesChain
+      typesBundle
     });
 
     // See https://github.com/polkadot-js/api/pull/4672#issuecomment-1078843960
diff --git a/packages/react-hooks/src/useApiUrl.ts b/packages/react-hooks/src/useApiUrl.ts
index ca6fc9c247..792ec133e2 100644
--- a/packages/react-hooks/src/useApiUrl.ts
+++ b/packages/react-hooks/src/useApiUrl.ts
@@ -6,7 +6,7 @@ import type { ProviderInterface } from '@polkadot/rpc-provider/types';
 import { useEffect, useMemo, useRef, useState } from 'react';
 
 import { ApiPromise, WsProvider } from '@polkadot/api';
-import { typesBundle, typesChain } from '@polkadot/apps-config';
+import { typesBundle } from '@polkadot/apps-config';
 import { arrayShuffle, isString } from '@polkadot/util';
 
 import { createNamedHook } from './createNamedHook';
@@ -45,8 +45,7 @@ function useApiUrlImpl (url?: null | string | string[]): ApiPromise | null {
       ApiPromise
         .create({
           provider: (providerRef.current = new WsProvider(urls)),
-          typesBundle,
-          typesChain
+          typesBundle
         })
         .then((api) => mountedRef.current && setState(api))
         .catch(console.error);