diff --git a/packages/core/src/controllers/BlockchainApiController.ts b/packages/core/src/controllers/BlockchainApiController.ts
index 7e7ee2d44a..1568d1da43 100644
--- a/packages/core/src/controllers/BlockchainApiController.ts
+++ b/packages/core/src/controllers/BlockchainApiController.ts
@@ -33,6 +33,7 @@ import type {
 } from '../utils/TypeUtil.js'
 import { OptionsController } from './OptionsController.js'
 import { proxy } from 'valtio/vanilla'
+import { AccountController } from './AccountController.js'
 
 const DEFAULT_OPTIONS = {
   purchaseCurrencies: [
@@ -130,7 +131,8 @@ export const BlockchainApiController = {
     return state.api.get<BlockchainApiIdentityResponse>({
       path: `/v1/identity/${address}`,
       params: {
-        projectId: OptionsController.state.projectId
+        projectId: OptionsController.state.projectId,
+        sender: AccountController.state.address
       }
     })
   },
@@ -143,13 +145,13 @@ export const BlockchainApiController = {
     signal,
     cache
   }: BlockchainApiTransactionsRequest) {
-    const queryParams = cursor ? { cursor } : {}
-
     return state.api.get<BlockchainApiTransactionsResponse>({
-      path: `/v1/account/${account}/history?projectId=${projectId}${
-        onramp ? `&onramp=${onramp}` : ''
-      }`,
-      params: queryParams,
+      path: `/v1/account/${account}/history`,
+      params: {
+        projectId,
+        cursor,
+        onramp
+      },
       signal,
       cache
     })
@@ -181,7 +183,11 @@ export const BlockchainApiController = {
 
   fetchSwapTokens({ projectId, chainId }: BlockchainApiSwapTokensRequest) {
     return state.api.get<BlockchainApiSwapTokensResponse>({
-      path: `/v1/convert/tokens?projectId=${projectId}&chainId=${chainId}`
+      path: `/v1/convert/tokens`,
+      params: {
+        projectId,
+        chainId
+      }
     })
   },
 
@@ -203,7 +209,12 @@ export const BlockchainApiController = {
     const { sdkType, sdkVersion } = OptionsController.state
 
     return state.api.get<BlockchainApiSwapAllowanceResponse>({
-      path: `/v1/convert/allowance?projectId=${projectId}&tokenAddress=${tokenAddress}&userAddress=${userAddress}`,
+      path: `/v1/convert/allowance`,
+      params: {
+        projectId,
+        tokenAddress,
+        userAddress
+      },
       headers: {
         'Content-Type': 'application/json',
         'x-sdk-type': sdkType,
@@ -298,19 +309,29 @@ export const BlockchainApiController = {
 
   async lookupEnsName(name: string) {
     return state.api.get<BlockchainApiLookupEnsName>({
-      path: `/v1/profile/account/${name}${CommonConstantsUtil.WC_NAME_SUFFIX}?projectId=${OptionsController.state.projectId}`
+      path: `/v1/profile/account/${name}${CommonConstantsUtil.WC_NAME_SUFFIX}`,
+      params: {
+        projectId: OptionsController.state.projectId
+      }
     })
   },
 
   async reverseLookupEnsName({ address }: { address: string }) {
     return state.api.get<BlockchainApiLookupEnsName[]>({
-      path: `/v1/profile/reverse/${address}?projectId=${OptionsController.state.projectId}`
+      path: `/v1/profile/reverse/${address}`,
+      params: {
+        sender: AccountController.state.address,
+        projectId: OptionsController.state.projectId
+      }
     })
   },
 
   async getEnsNameSuggestions(name: string) {
     return state.api.get<BlockchainApiSuggestionResponse>({
-      path: `/v1/profile/suggestions/${name}?projectId=${OptionsController.state.projectId}`
+      path: `/v1/profile/suggestions/${name}`,
+      params: {
+        projectId: OptionsController.state.projectId
+      }
     })
   },
 
@@ -337,7 +358,10 @@ export const BlockchainApiController = {
     paymentAmount
   }: GenerateOnRampUrlArgs) {
     const response = await state.api.post<{ url: string }>({
-      path: `/v1/generators/onrampurl?projectId=${OptionsController.state.projectId}`,
+      path: `/v1/generators/onrampurl`,
+      params: {
+        projectId: OptionsController.state.projectId
+      },
       body: {
         destinationWallets,
         defaultNetwork,
@@ -357,7 +381,10 @@ export const BlockchainApiController = {
         paymentCurrencies: PaymentCurrency[]
         purchaseCurrencies: PurchaseCurrency[]
       }>({
-        path: `/v1/onramp/options?projectId=${OptionsController.state.projectId}`
+        path: `/v1/onramp/options`,
+        params: {
+          projectId: OptionsController.state.projectId
+        }
       })
 
       return response
@@ -369,7 +396,10 @@ export const BlockchainApiController = {
   async getOnrampQuote({ purchaseCurrency, paymentCurrency, amount, network }: GetQuoteArgs) {
     try {
       const response = await state.api.post<OnrampQuote>({
-        path: `/v1/onramp/quote?projectId=${OptionsController.state.projectId}`,
+        path: `/v1/onramp/quote`,
+        params: {
+          projectId: OptionsController.state.projectId
+        },
         body: {
           purchaseCurrency,
           paymentCurrency,