diff --git a/qortal-ui-crypto/api/api.js b/qortal-ui-crypto/api/api.js
index bcc5d8b8..3fc50db4 100644
--- a/qortal-ui-crypto/api/api.js
+++ b/qortal-ui-crypto/api/api.js
@@ -2,7 +2,7 @@ export { request } from './fetch-request.js'
 
 export { transactionTypes as transactions } from './transactions/transactions.js'
 
-export { processTransaction, createTransaction, computeChatNonce, signChatTransaction } from './createTransaction.js'
+export { processTransaction, createTransaction, computeChatNonce, signChatTransaction, signArbitraryTransaction } from './createTransaction.js'
 
 export { tradeBotCreateRequest, tradeBotRespondRequest, signTradeBotTxn, deleteTradeOffer, sendBtc, sendLtc, sendDoge } from './tradeRequest.js'
 
diff --git a/qortal-ui-crypto/api/createTransaction.js b/qortal-ui-crypto/api/createTransaction.js
index 3481f121..d876b98a 100644
--- a/qortal-ui-crypto/api/createTransaction.js
+++ b/qortal-ui-crypto/api/createTransaction.js
@@ -2,6 +2,7 @@ import { transactionTypes as transactions } from './transactions/transactions.js
 import Base58 from './deps/Base58.js'
 import { request } from './fetch-request'
 import signChat from './transactions/chat/signChat.js'
+import signArbitrary from './transactions/arbitrary/signArbitrary.js'
 
 
 export const createTransaction = (type, keyPair, params) => {
@@ -25,6 +26,11 @@ export const signChatTransaction = (chatBytes, nonce, keyPair) => {
     return signChat(chatBytes, nonce, keyPair)
 }
 
+// Sign Arbitrary Transactions
+export const signArbitraryTransaction = (arbitraryBytesBase58, arbitraryBytesForSigningBase58, nonce, keyPair) => {
+    return signArbitrary(arbitraryBytesBase58, arbitraryBytesForSigningBase58, nonce, keyPair)
+}
+
 // Process Transactions
 export const processTransaction = bytes => request('/transactions/process', {
     method: 'POST',
diff --git a/qortal-ui-crypto/api/tradeRequest.js b/qortal-ui-crypto/api/tradeRequest.js
index 18ec53a4..8eab79a6 100644
--- a/qortal-ui-crypto/api/tradeRequest.js
+++ b/qortal-ui-crypto/api/tradeRequest.js
@@ -12,8 +12,9 @@ import { request } from './fetch-request'
 // TradeBotCreateRequest
 export const tradeBotCreateRequest = (requestObject) => {
     const txn = new TradeBotCreateRequest().createTransaction(requestObject)
+    const myNode = window.parent.reduxStore.getState().app.nodeConfig.knownNodes[window.parent.reduxStore.getState().app.nodeConfig.node];
 
-    return request('/crosschain/tradebot/create', {
+    return request(`/crosschain/tradebot/create?apiKey=${myNode.apiKey}`, {
         method: 'POST',
         headers: {
             'Accept': 'text/plain',
@@ -26,8 +27,9 @@ export const tradeBotCreateRequest = (requestObject) => {
 // TradeBotRespondRequest
 export const tradeBotRespondRequest = (requestObject) => {
     const txn = new TradeBotRespondRequest().createTransaction(requestObject)
+    const myNode = window.parent.reduxStore.getState().app.nodeConfig.knownNodes[window.parent.reduxStore.getState().app.nodeConfig.node];
 
-    return request('/crosschain/tradebot/respond', {
+    return request(`/crosschain/tradebot/respond?apiKey=${myNode.apiKey}`, {
         method: 'POST',
         headers: {
             'Accept': 'application/json',
@@ -46,8 +48,9 @@ export const signTradeBotTxn = (unsignedTxn, keyPair) => {
 // Delete Trade Offer
 export const deleteTradeOffer = (requestObject) => {
     const txn = new DeleteTradeOffer().createTransaction(requestObject)
+    const myNode = window.parent.reduxStore.getState().app.nodeConfig.knownNodes[window.parent.reduxStore.getState().app.nodeConfig.node];
 
-    return request('/crosschain/tradeoffer', {
+    return request(`/crosschain/tradeoffer?apiKey=${myNode.apiKey}`, {
         method: 'DELETE',
         headers: {
             'Accept': 'application/json',
@@ -59,8 +62,9 @@ export const deleteTradeOffer = (requestObject) => {
 
 // Send BTC 
 export const sendBtc = (requestObject) => {
+    const myNode = window.parent.reduxStore.getState().app.nodeConfig.knownNodes[window.parent.reduxStore.getState().app.nodeConfig.node];
 
-    return request('/crosschain/btc/send', {
+    return request(`/crosschain/btc/send?apiKey=${myNode.apiKey}`, {
         method: 'POST',
         headers: {
             'Accept': 'application/json',
@@ -72,8 +76,9 @@ export const sendBtc = (requestObject) => {
 
 // Send LTC 
 export const sendLtc = (requestObject) => {
+    const myNode = window.parent.reduxStore.getState().app.nodeConfig.knownNodes[window.parent.reduxStore.getState().app.nodeConfig.node];
 
-    return request('/crosschain/ltc/send', {
+    return request(`/crosschain/ltc/send?apiKey=${myNode.apiKey}`, {
         method: 'POST',
         headers: {
             'Accept': 'application/json',
@@ -85,8 +90,9 @@ export const sendLtc = (requestObject) => {
 
 // Send DOGE 
 export const sendDoge = (requestObject) => {
+    const myNode = window.parent.reduxStore.getState().app.nodeConfig.knownNodes[window.parent.reduxStore.getState().app.nodeConfig.node];
 
-    return request('/crosschain/doge/send', {
+    return request(`/crosschain/doge/send?apiKey=${myNode.apiKey}`, {
         method: 'POST',
         headers: {
             'Accept': 'application/json',
diff --git a/qortal-ui-crypto/api/transactions/arbitrary/signArbitrary.js b/qortal-ui-crypto/api/transactions/arbitrary/signArbitrary.js
new file mode 100644
index 00000000..47f37f81
--- /dev/null
+++ b/qortal-ui-crypto/api/transactions/arbitrary/signArbitrary.js
@@ -0,0 +1,39 @@
+import nacl from '../../deps/nacl-fast.js'
+import utils from '../../deps/utils.js'
+import Base58 from '../../deps/Base58.js'
+
+
+const signArbitrary = (arbitraryBytesBase58, arbitraryBytesForSigningBase58, nonce, keyPair) => {
+
+    if (!arbitraryBytesBase58) {
+        throw new Error('ArbitraryBytesBase58 not defined')
+    }
+
+    if (!nonce) {
+        throw new Error('Nonce not defined')
+    }
+
+    if (!keyPair) {
+        throw new Error('keyPair not defined')
+    }
+
+    const arbitraryBytes = Base58.decode(arbitraryBytesBase58)
+    const _arbitraryBytesBuffer = Object.keys(arbitraryBytes).map(function (key) { return arbitraryBytes[key]; });
+    const arbitraryBytesBuffer = new Uint8Array(_arbitraryBytesBuffer)
+
+    const arbitraryBytesForSigning = Base58.decode(arbitraryBytesForSigningBase58)
+    const _arbitraryBytesForSigningBuffer = Object.keys(arbitraryBytesForSigning).map(function (key) { return arbitraryBytesForSigning[key]; });
+    const arbitraryBytesForSigningBuffer = new Uint8Array(_arbitraryBytesForSigningBuffer)
+
+    const _nonce = utils.int32ToBytes(nonce)
+    arbitraryBytesBuffer.set(_nonce, 112)
+    arbitraryBytesForSigningBuffer.set(_nonce, 112)
+
+    const signature = nacl.sign.detached(arbitraryBytesForSigningBuffer, keyPair.privateKey)
+
+    const signedBytes = utils.appendBuffer(arbitraryBytesBuffer, signature)
+
+    return signedBytes
+}
+
+export default signArbitrary