diff --git a/apps/ui/src/components/Modal/Delegate.vue b/apps/ui/src/components/Modal/Delegate.vue
index 4ceab72bc..994713a89 100644
--- a/apps/ui/src/components/Modal/Delegate.vue
+++ b/apps/ui/src/components/Modal/Delegate.vue
@@ -47,7 +47,11 @@ const sending = ref(false);
 const formErrors = ref({} as Record<string, any>);
 
 async function handleSubmit() {
-  if (!props.delegation.apiType || !props.delegation.contractAddress) {
+  if (
+    !props.delegation.apiType ||
+    !props.delegation.contractAddress ||
+    !props.delegation.chainId
+  ) {
     return;
   }
 
@@ -56,11 +60,10 @@ async function handleSubmit() {
   try {
     await delegate(
       props.space,
-      props.delegation.contractNetwork,
       props.delegation.apiType,
       form.delegatee,
-      `${props.delegation.contractNetwork}:${props.delegation.contractAddress}`,
-      props.delegation.chainId ?? undefined
+      props.delegation.contractAddress,
+      props.delegation.chainId
     );
     emit('close');
   } catch (e) {
diff --git a/apps/ui/src/components/Modal/DelegationConfig.vue b/apps/ui/src/components/Modal/DelegationConfig.vue
index def7ece27..734562826 100644
--- a/apps/ui/src/components/Modal/DelegationConfig.vue
+++ b/apps/ui/src/components/Modal/DelegationConfig.vue
@@ -8,7 +8,6 @@ const DEFAULT_FORM_STATE = {
   name: '',
   apiType: null,
   apiUrl: null,
-  contractNetwork: null,
   contractAddress: null,
   chainId: null
 };
@@ -27,10 +26,6 @@ const showPicker = ref(false);
 const searchValue = ref('');
 const form: Ref<SpaceMetadataDelegation> = ref(clone(DEFAULT_FORM_STATE));
 
-const networkField = computed(() =>
-  offchainNetworks.includes(props.networkId) ? 'chainId' : 'contractNetwork'
-);
-
 const definition = computed(() => {
   return {
     type: 'object',
@@ -69,14 +64,15 @@ const definition = computed(() => {
                 'https://api.thegraph.com/subgraphs/name/arr00/uniswap-governance-v2'
               ]
             },
-            [networkField.value]: {
+            chainId: {
               type: ['string', 'number', 'null'],
               format: 'network',
               networkId: props.networkId,
+              networksListKind: 'full',
               title: 'Delegation contract network',
               nullable: true
             },
-            ...(form.value[networkField.value] !== null
+            ...(form.value.chainId !== null
               ? {
                   contractAddress: {
                     type: 'string',
diff --git a/apps/ui/src/components/Modal/TreasuryConfig.vue b/apps/ui/src/components/Modal/TreasuryConfig.vue
index 52372cbd9..cdc171563 100644
--- a/apps/ui/src/components/Modal/TreasuryConfig.vue
+++ b/apps/ui/src/components/Modal/TreasuryConfig.vue
@@ -47,6 +47,9 @@ const definition = computed(() => {
         type: ['string', 'number', 'null'],
         format: 'network',
         networkId: props.networkId,
+        networksListKind: offchainNetworks.includes(props.networkId)
+          ? 'full'
+          : 'builtin',
         title: 'Treasury network',
         nullable: true
       },
diff --git a/apps/ui/src/components/SpaceDelegates.vue b/apps/ui/src/components/SpaceDelegates.vue
index 6449a7693..b5c5f199e 100644
--- a/apps/ui/src/components/SpaceDelegates.vue
+++ b/apps/ui/src/components/SpaceDelegates.vue
@@ -3,7 +3,6 @@ import { sanitizeUrl } from '@braintree/sanitize-url';
 import removeMarkdown from 'remove-markdown';
 import { getGenericExplorerUrl } from '@/helpers/explorer';
 import { _n, _p, _vp, shorten } from '@/helpers/utils';
-import { getNetwork } from '@/networks';
 import { DelegationType, Space, SpaceMetadataDelegation } from '@/types';
 
 const props = defineProps<{
@@ -40,23 +39,11 @@ const {
 );
 const { web3 } = useWeb3();
 
-const currentNetwork = computed(() => {
-  if (!props.delegation.contractNetwork) return null;
-
-  try {
-    return getNetwork(props.delegation.contractNetwork);
-  } catch (e) {
-    return null;
-  }
-});
-
 const spaceKey = computed(() => `${props.space.network}:${props.space.id}`);
 
 function getExplorerUrl(address: string, type: 'address' | 'token') {
   let url: string | null = null;
-  if (currentNetwork.value) {
-    url = currentNetwork.value.helpers.getExplorerUrl(address, type);
-  } else if (props.delegation.chainId) {
+  if (props.delegation.chainId) {
     url = getGenericExplorerUrl(props.delegation.chainId, address, type);
   } else {
     return null;
diff --git a/apps/ui/src/components/Ui/SelectorNetwork.vue b/apps/ui/src/components/Ui/SelectorNetwork.vue
index 71bb5a7b1..b11fec7fd 100644
--- a/apps/ui/src/components/Ui/SelectorNetwork.vue
+++ b/apps/ui/src/components/Ui/SelectorNetwork.vue
@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import networks from '@snapshot-labs/snapshot.js/src/networks.json';
 import { getUrl } from '@/helpers/utils';
-import { enabledNetworks, getNetwork, offchainNetworks } from '@/networks';
+import { enabledNetworks, getNetwork } from '@/networks';
 import { METADATA as STARKNET_NETWORK_METADATA } from '@/networks/starknet';
 import { BaseDefinition, NetworkID } from '@/types';
 
@@ -12,11 +12,12 @@ const network = defineModel<string | number | null>({
 const props = defineProps<{
   definition: BaseDefinition<string | number | null> & {
     networkId: NetworkID;
+    networksListKind?: 'full' | 'builtin';
   };
 }>();
 
 const options = computed(() => {
-  if (offchainNetworks.includes(props.definition.networkId)) {
+  if (props.definition.networksListKind === 'full') {
     const baseNetworks = Object.entries(networks)
       .filter(([, network]) => {
         if (
@@ -41,15 +42,26 @@ const options = computed(() => {
 
     return [
       ...baseNetworks,
-      ...Object.values(STARKNET_NETWORK_METADATA).map(metadata => ({
-        id: metadata.chainId,
-        name: metadata.name,
-        icon: h('img', {
-          src: getUrl(metadata.avatar),
-          alt: metadata.name,
-          class: 'rounded-full'
+      ...Object.values(STARKNET_NETWORK_METADATA)
+        .filter(metadata => {
+          if (
+            props.definition.networkId === 's' &&
+            metadata.name.includes('Sepolia')
+          ) {
+            return false;
+          }
+
+          return true;
         })
-      }))
+        .map(metadata => ({
+          id: metadata.chainId,
+          name: metadata.name,
+          icon: h('img', {
+            src: getUrl(metadata.avatar),
+            alt: metadata.name,
+            class: 'rounded-full'
+          })
+        }))
     ];
   }
 
diff --git a/apps/ui/src/composables/useActions.ts b/apps/ui/src/composables/useActions.ts
index 4e6151e57..af744e40d 100644
--- a/apps/ui/src/composables/useActions.ts
+++ b/apps/ui/src/composables/useActions.ts
@@ -574,22 +574,19 @@ export function useActions() {
 
   async function delegate(
     space: Space,
-    networkId: NetworkID | null,
     delegationType: DelegationType,
     delegatee: string,
     delegationContract: string,
-    chainIdOverride?: ChainId
+    chainId: ChainId
   ) {
     if (!web3.value.account) return await forceLogin();
 
-    const isEvmNetwork = typeof chainIdOverride === 'number';
-    const actionNetwork =
-      networkId ??
-      (isEvmNetwork
-        ? 'eth'
-        : (Object.entries(METADATA).find(
-            ([, metadata]) => metadata.chainId === chainIdOverride
-          )?.[0] as NetworkID));
+    const isEvmNetwork = typeof chainId === 'number';
+    const actionNetwork = isEvmNetwork
+      ? 'eth'
+      : (Object.entries(METADATA).find(
+          ([, metadata]) => metadata.chainId === chainId
+        )?.[0] as NetworkID);
     if (!actionNetwork) throw new Error('Failed to detect action network');
 
     const network = getReadWriteNetwork(actionNetwork);
@@ -603,7 +600,7 @@ export function useActions() {
         delegationType,
         delegatee,
         delegationContract,
-        chainIdOverride
+        chainId
       )
     );
   }
diff --git a/apps/ui/src/helpers/utils.test.ts b/apps/ui/src/helpers/utils.test.ts
index 64145a194..94eea47b0 100644
--- a/apps/ui/src/helpers/utils.test.ts
+++ b/apps/ui/src/helpers/utils.test.ts
@@ -86,7 +86,7 @@ describe('utils', () => {
             apiType: 'governor-subgraph',
             apiUrl:
               'https://thegraph.com/hosted-service/subgraph/arr00/uniswap-governance-v2',
-            contractNetwork: 'sep',
+            chainId: 11155111,
             contractAddress: '0x000000000000000000000000000000000000dead'
           }
         ]
@@ -124,7 +124,8 @@ describe('utils', () => {
               api_type: 'governor-subgraph',
               api_url:
                 'https://thegraph.com/hosted-service/subgraph/arr00/uniswap-governance-v2',
-              contract: 'sep:0x000000000000000000000000000000000000dead'
+              contract: '0x000000000000000000000000000000000000dead',
+              chain_id: 11155111
             }
           ]
         }
diff --git a/apps/ui/src/helpers/utils.ts b/apps/ui/src/helpers/utils.ts
index 6e7d4f3e2..eab925ff5 100644
--- a/apps/ui/src/helpers/utils.ts
+++ b/apps/ui/src/helpers/utils.ts
@@ -457,7 +457,8 @@ export function createErc1155Metadata(
         name: delegation.name,
         api_type: delegation.apiType,
         api_url: delegation.apiUrl,
-        contract: `${delegation.contractNetwork}:${delegation.contractAddress}`
+        contract: delegation.contractAddress,
+        chain_id: delegation.chainId
       })),
       ...extraProperties
     }
diff --git a/apps/ui/src/helpers/validation.ts b/apps/ui/src/helpers/validation.ts
index 7646c195b..95f8e38d0 100644
--- a/apps/ui/src/helpers/validation.ts
+++ b/apps/ui/src/helpers/validation.ts
@@ -254,6 +254,7 @@ ajv.addFormat('network', {
   validate: () => true
 });
 ajv.addKeyword('networkId');
+ajv.addKeyword('networksListKind');
 
 function getErrorMessage(errorObject: Partial<ErrorObject>): string {
   if (!errorObject.message) return 'Invalid field.';
diff --git a/apps/ui/src/networks/common/graphqlApi/index.ts b/apps/ui/src/networks/common/graphqlApi/index.ts
index 42bb72afe..c0da8b354 100644
--- a/apps/ui/src/networks/common/graphqlApi/index.ts
+++ b/apps/ui/src/networks/common/graphqlApi/index.ts
@@ -199,17 +199,28 @@ function formatSpace(
       return { id, name, description, color };
     }),
     delegations: space.metadata.delegations.map(delegation => {
-      const { name, api_type, api_url, contract } = JSON.parse(delegation);
-
-      const [network, address] = contract.split(':');
+      const { name, api_type, api_url, contract, chain_id } =
+        JSON.parse(delegation);
+
+      if (contract.includes(':')) {
+        // NOTE: Legacy format
+        const [network, address] = contract.split(':');
+
+        return {
+          name: name,
+          apiType: api_type,
+          apiUrl: api_url,
+          contractAddress: address === 'null' ? null : address,
+          chainId: CHAIN_IDS[network]
+        };
+      }
 
       return {
         name: name,
         apiType: api_type,
         apiUrl: api_url,
-        contractNetwork: network === 'null' ? null : network,
-        contractAddress: address === 'null' ? null : address,
-        chainId: CHAIN_IDS[network]
+        contractAddress: contract,
+        chainId: chain_id
       };
     }),
     executors: space.metadata.executors,
diff --git a/apps/ui/src/networks/evm/actions.ts b/apps/ui/src/networks/evm/actions.ts
index 0c92c7be1..837b1394e 100644
--- a/apps/ui/src/networks/evm/actions.ts
+++ b/apps/ui/src/networks/evm/actions.ts
@@ -620,7 +620,7 @@ export function createActions(
 
       if (delegationType === 'governor-subgraph') {
         contractParams = {
-          address: delegationContract.split(':')[1],
+          address: delegationContract,
           functionName: 'delegate',
           functionParams: [delegatee],
           abi: ['function delegate(address delegatee)']
diff --git a/apps/ui/src/networks/offchain/api/index.ts b/apps/ui/src/networks/offchain/api/index.ts
index b48f0d8dc..55f5f6cb8 100644
--- a/apps/ui/src/networks/offchain/api/index.ts
+++ b/apps/ui/src/networks/offchain/api/index.ts
@@ -368,7 +368,6 @@ function formatDelegations(space: ApiSpace): SpaceMetadataDelegation[] {
       name,
       apiType,
       apiUrl: space.delegationPortal.delegationApi,
-      contractNetwork: null,
       contractAddress: space.delegationPortal.delegationContract,
       chainId
     });
@@ -381,7 +380,6 @@ function formatDelegations(space: ApiSpace): SpaceMetadataDelegation[] {
       name: 'Delegate registry',
       apiType: 'delegate-registry',
       apiUrl: DELEGATE_REGISTRY_URL,
-      contractNetwork: null,
       contractAddress: space.id,
       chainId
     });
diff --git a/apps/ui/src/networks/starknet/actions.ts b/apps/ui/src/networks/starknet/actions.ts
index 44c37f708..dd430164d 100644
--- a/apps/ui/src/networks/starknet/actions.ts
+++ b/apps/ui/src/networks/starknet/actions.ts
@@ -688,12 +688,10 @@ export function createActions(
     ) => {
       await verifyStarknetNetwork(web3, chainId);
 
-      const [, contractAddress] = delegationContract.split(':');
-
       const { account }: { account: Account } = web3.provider;
 
       let calls: AllowArray<Call> = {
-        contractAddress,
+        contractAddress: delegationContract,
         entrypoint: 'delegate',
         calldata: CallData.compile({ delegatee })
       };
diff --git a/apps/ui/src/types.ts b/apps/ui/src/types.ts
index 1058ee10a..72e4eaee0 100644
--- a/apps/ui/src/types.ts
+++ b/apps/ui/src/types.ts
@@ -77,9 +77,8 @@ export type SpaceMetadataDelegation = {
   name: string | null;
   apiType: DelegationType | null;
   apiUrl: string | null;
-  contractNetwork: NetworkID | null;
   contractAddress: string | null;
-  chainId?: ChainId | null;
+  chainId: ChainId | null;
 };
 
 export type SpaceMetadata = {