diff --git a/embedded/modules/call/call.js b/embedded/modules/call/call.js
index db3a981..caa0508 100644
--- a/embedded/modules/call/call.js
+++ b/embedded/modules/call/call.js
@@ -61,8 +61,10 @@ function buildParametersFromABI(functionDef, paramValues) {
 
     if (value !== undefined) {
       parameters.push({
-        ParameterFlag: paramDef.flag,
-        ParameterValue: formatParameterValue(paramDef.type, value),
+        Parameter: {
+          ParameterName: Buffer.from(paramDef.name).toString('hex').toUpperCase(),
+          ParameterValue: formatParameterValue(paramDef.type, value),
+        },
       });
     }
   }
@@ -148,6 +150,7 @@ async function callContract(config) {
     contract_account,
     function_name,
     network_url,
+    rpc_url,
     wallet_seed,
     abi_path,
     parameters,
@@ -268,9 +271,8 @@ async function callContract(config) {
       // Local nodes: use HTTP RPC to avoid WebSocket hangs under emulation
       await client.disconnect();
 
-      const rpcUrl = network_url
-        .replace('ws://', 'http://').replace('wss://', 'https://')
-        .replace('localhost:6006', 'localhost:5005');
+      const rpcUrl = rpc_url || network_url
+        .replace('ws://', 'http://').replace('wss://', 'https://');
 
       const submitResult = await httpRPC(rpcUrl, 'submit', { tx_blob: signed.tx_blob }, 120000);
 
diff --git a/embedded/modules/deploy/deploy.js b/embedded/modules/deploy/deploy.js
index 2f7c8bf..ff2bd1a 100644
--- a/embedded/modules/deploy/deploy.js
+++ b/embedded/modules/deploy/deploy.js
@@ -151,6 +151,7 @@ async function deployContract(config) {
     wasm_path,
     abi_path,
     network_url,
+    rpc_url,
     wallet_seed,
     faucet_url,
     fee,
@@ -390,9 +391,8 @@ async function deployContract(config) {
       // Local nodes: use HTTP RPC to avoid WebSocket hangs under emulation
       await client.disconnect();
 
-      const rpcUrl = network_url
-        .replace('ws://', 'http://').replace('wss://', 'https://')
-        .replace('localhost:6006', 'localhost:5005');
+      const rpcUrl = rpc_url || network_url
+        .replace('ws://', 'http://').replace('wss://', 'https://');
 
       const submitResult = await httpRPC(rpcUrl, 'submit', { tx_blob: signed.tx_blob }, 120000);
 
diff --git a/internal/cli/account.go b/internal/cli/account.go
index 6d85518..7e8aa13 100644
--- a/internal/cli/account.go
+++ b/internal/cli/account.go
@@ -52,6 +52,7 @@ func runAccount(cmd *cobra.Command, args []string) error {
 		if accountNetwork == "local" {
 			networkCfg = config.NetworkConfig{
 				URL:       "ws://localhost:6006",
+				RPCURL:    "http://localhost:5005",
 				NetworkID: 63456,
 			}
 		} else {
@@ -59,7 +60,7 @@ func runAccount(cmd *cobra.Command, args []string) error {
 		}
 	}
 
-	client := chain.NewClient(networkCfg.URL)
+	client := chain.NewClient(networkCfg.URL, networkCfg.GetRPCURL())
 	ctx := cmd.Context()
 
 	switch subcommand {
diff --git a/internal/cli/call.go b/internal/cli/call.go
index b00f3d9..8b59ffb 100644
--- a/internal/cli/call.go
+++ b/internal/cli/call.go
@@ -71,6 +71,7 @@ func runCall(cmd *cobra.Command, args []string) error {
 		if callNetwork == "local" {
 			networkCfg = config.NetworkConfig{
 				URL:       "ws://localhost:6006",
+				RPCURL:    "http://localhost:5005",
 				NetworkID: 0, // Local network uses network ID 0
 			}
 		} else {
@@ -134,6 +135,7 @@ func runCall(cmd *cobra.Command, args []string) error {
 		ContractAccount:      contractAccount,
 		FunctionName:         functionName,
 		NetworkURL:           networkCfg.URL,
+		RPCURL:               networkCfg.GetRPCURL(),
 		NetworkID:            networkCfg.NetworkID,
 		WalletSeed:           walletSeed,
 		Algorithm:            callAlgorithm,
diff --git a/internal/cli/clawback.go b/internal/cli/clawback.go
index 5097200..fc30b80 100644
--- a/internal/cli/clawback.go
+++ b/internal/cli/clawback.go
@@ -56,7 +56,7 @@ func runClawback(cmd *cobra.Command, args []string) error {
 	networkCfg, ok := cfg.Networks[clawbackNetwork]
 	if !ok {
 		if clawbackNetwork == "local" {
-			networkCfg = config.NetworkConfig{URL: "ws://localhost:6006", NetworkID: 63456}
+			networkCfg = config.NetworkConfig{URL: "ws://localhost:6006", RPCURL: "http://localhost:5005", NetworkID: 63456}
 		} else {
 			return fmt.Errorf("network '%s' not found in config", clawbackNetwork)
 		}
diff --git a/internal/cli/console.go b/internal/cli/console.go
index 5f2672c..e616aca 100644
--- a/internal/cli/console.go
+++ b/internal/cli/console.go
@@ -50,6 +50,7 @@ func runConsole(cmd *cobra.Command, args []string) error {
 		if consoleNetwork == "local" {
 			networkCfg = config.NetworkConfig{
 				URL:       "ws://localhost:6006",
+				RPCURL:    "http://localhost:5005",
 				NetworkID: 63456,
 			}
 		} else {
diff --git a/internal/cli/delete.go b/internal/cli/delete.go
index 5ac09cf..8fa71ee 100644
--- a/internal/cli/delete.go
+++ b/internal/cli/delete.go
@@ -53,7 +53,7 @@ func runDelete(cmd *cobra.Command, args []string) error {
 	networkCfg, ok := cfg.Networks[deleteNetwork]
 	if !ok {
 		if deleteNetwork == "local" {
-			networkCfg = config.NetworkConfig{URL: "ws://localhost:6006", NetworkID: 63456}
+			networkCfg = config.NetworkConfig{URL: "ws://localhost:6006", RPCURL: "http://localhost:5005", NetworkID: 63456}
 		} else {
 			return fmt.Errorf("network '%s' not found in config", deleteNetwork)
 		}
diff --git a/internal/cli/deploy.go b/internal/cli/deploy.go
index 2a7353b..a7761ec 100644
--- a/internal/cli/deploy.go
+++ b/internal/cli/deploy.go
@@ -80,6 +80,7 @@ func runDeploy(cmd *cobra.Command, args []string) error {
 		if deployNetwork == "local" {
 			networkCfg = config.NetworkConfig{
 				URL:       "ws://localhost:6006",
+				RPCURL:    "http://localhost:5005",
 				NetworkID: 63456,
 				FaucetURL: "http://localhost:8080/faucet",
 			}
@@ -220,6 +221,7 @@ func runDeploy(cmd *cobra.Command, args []string) error {
 		WasmPath:      wasmPath,
 		ABIPath:       abiPath,
 		NetworkURL:    networkCfg.URL,
+		RPCURL:        networkCfg.GetRPCURL(),
 		NetworkID:     networkCfg.NetworkID,
 		WalletSeed:    walletSeed,
 		Algorithm:     deployAlgorithm,
diff --git a/internal/cli/events.go b/internal/cli/events.go
index bea765e..9e89e93 100644
--- a/internal/cli/events.go
+++ b/internal/cli/events.go
@@ -55,6 +55,7 @@ func runEvents(cmd *cobra.Command, args []string) error {
 		if eventsNetwork == "local" {
 			networkCfg = config.NetworkConfig{
 				URL:       "ws://localhost:6006",
+				RPCURL:    "http://localhost:5005",
 				NetworkID: 63456,
 			}
 		} else {
@@ -62,7 +63,7 @@ func runEvents(cmd *cobra.Command, args []string) error {
 		}
 	}
 
-	client := chain.NewClient(networkCfg.URL)
+	client := chain.NewClient(networkCfg.URL, networkCfg.GetRPCURL())
 	ctx := cmd.Context()
 
 	color.Cyan("Contract Events\n")
diff --git a/internal/cli/faucet.go b/internal/cli/faucet.go
index c6e0e27..b150dc9 100644
--- a/internal/cli/faucet.go
+++ b/internal/cli/faucet.go
@@ -55,6 +55,7 @@ func runFaucet(cmd *cobra.Command, args []string) error {
 		if isLocal {
 			networkCfg = config.NetworkConfig{
 				URL:       "ws://localhost:6006",
+				RPCURL:    "http://localhost:5005",
 				NetworkID: 0, // Local network uses network ID 0
 			}
 		} else {
diff --git a/internal/cli/info.go b/internal/cli/info.go
index 6d22d84..5a3203c 100644
--- a/internal/cli/info.go
+++ b/internal/cli/info.go
@@ -51,6 +51,7 @@ func runInfo(cmd *cobra.Command, args []string) error {
 		if infoNetwork == "local" {
 			networkCfg = config.NetworkConfig{
 				URL:       "ws://localhost:6006",
+				RPCURL:    "http://localhost:5005",
 				NetworkID: 63456,
 			}
 		} else {
@@ -58,7 +59,7 @@ func runInfo(cmd *cobra.Command, args []string) error {
 		}
 	}
 
-	client := chain.NewClient(networkCfg.URL)
+	client := chain.NewClient(networkCfg.URL, networkCfg.GetRPCURL())
 	ctx := cmd.Context()
 
 	color.Cyan("Contract Info\n")
diff --git a/internal/cli/init.go b/internal/cli/init.go
index b38ce92..0d848b2 100644
--- a/internal/cli/init.go
+++ b/internal/cli/init.go
@@ -100,6 +100,7 @@ ledger_interval = 1000
 
 [networks.local]
 url = "ws://localhost:6006"
+rpc_url = "http://localhost:5005"
 network_id = 63456
 faucet_url = "http://localhost:8080/faucet"
 
diff --git a/internal/cli/ledger.go b/internal/cli/ledger.go
index 69e6b98..c061d4b 100644
--- a/internal/cli/ledger.go
+++ b/internal/cli/ledger.go
@@ -61,6 +61,7 @@ func runLedger(cmd *cobra.Command, args []string) error {
 		if ledgerNetwork == "local" {
 			networkCfg = config.NetworkConfig{
 				URL:       "ws://localhost:6006",
+				RPCURL:    "http://localhost:5005",
 				NetworkID: 63456,
 			}
 		} else {
@@ -68,7 +69,7 @@ func runLedger(cmd *cobra.Command, args []string) error {
 		}
 	}
 
-	client := chain.NewClient(networkCfg.URL)
+	client := chain.NewClient(networkCfg.URL, networkCfg.GetRPCURL())
 	ctx := cmd.Context()
 
 	ledgerIndex := "current"
@@ -108,6 +109,7 @@ func runTx(cmd *cobra.Command, args []string) error {
 		if txNetwork == "local" {
 			networkCfg = config.NetworkConfig{
 				URL:       "ws://localhost:6006",
+				RPCURL:    "http://localhost:5005",
 				NetworkID: 63456,
 			}
 		} else {
@@ -115,7 +117,7 @@ func runTx(cmd *cobra.Command, args []string) error {
 		}
 	}
 
-	client := chain.NewClient(networkCfg.URL)
+	client := chain.NewClient(networkCfg.URL, networkCfg.GetRPCURL())
 	ctx := cmd.Context()
 
 	color.Cyan("Transaction Details\n")
diff --git a/internal/cli/modify.go b/internal/cli/modify.go
index b97df70..525d796 100644
--- a/internal/cli/modify.go
+++ b/internal/cli/modify.go
@@ -70,7 +70,7 @@ func runModify(cmd *cobra.Command, args []string) error {
 	networkCfg, ok := cfg.Networks[modifyNetwork]
 	if !ok {
 		if modifyNetwork == "local" {
-			networkCfg = config.NetworkConfig{URL: "ws://localhost:6006", NetworkID: 63456}
+			networkCfg = config.NetworkConfig{URL: "ws://localhost:6006", RPCURL: "http://localhost:5005", NetworkID: 63456}
 		} else {
 			return fmt.Errorf("network '%s' not found in config", modifyNetwork)
 		}
diff --git a/internal/cli/node.go b/internal/cli/node.go
index 410f4c9..11ed1e2 100644
--- a/internal/cli/node.go
+++ b/internal/cli/node.go
@@ -81,11 +81,21 @@ func nodeStart(ctx context.Context, manager *network.Manager) error {
 	// Convert ledger interval from milliseconds to duration
 	ledgerInterval := time.Duration(cfg.LocalNode.LedgerInterval) * time.Millisecond
 
+	// Resolve local network URLs from config
+	localCfg, ok := cfg.Networks["local"]
+	if !ok {
+		localCfg = config.NetworkConfig{
+			URL:    "ws://localhost:6006",
+			RPCURL: DefaultLocalRPCURL,
+		}
+	}
+	rpcURL := localCfg.GetRPCURL()
+
 	opts := network.StartOptions{
 		DockerImage:    cfg.LocalNode.DockerImage,
 		ConfigDir:      cfg.LocalNode.ConfigDir,
 		LedgerInterval: ledgerInterval,
-		RPCURL:         DefaultLocalRPCURL,
+		RPCURL:         rpcURL,
 	}
 
 	if err := manager.Start(ctx, opts); err != nil {
@@ -98,7 +108,7 @@ func nodeStart(ctx context.Context, manager *network.Manager) error {
 	fmt.Println()
 
 	// Start the ledger daemon in background
-	if err := startLedgerDaemon(cfg.LocalNode.LedgerInterval); err != nil {
+	if err := startLedgerDaemon(cfg.LocalNode.LedgerInterval, rpcURL); err != nil {
 		color.Yellow("Warning: Failed to start ledger daemon: %v\n", err)
 		color.Yellow("Ledgers will not advance automatically.\n")
 	} else {
@@ -107,8 +117,8 @@ func nodeStart(ctx context.Context, manager *network.Manager) error {
 
 	fmt.Println()
 	color.Cyan("Connection Details:\n")
-	fmt.Println("  WebSocket URL: ws://localhost:6006")
-	fmt.Println("  RPC URL:       http://localhost:5005")
+	fmt.Printf("  WebSocket URL: %s\n", localCfg.URL)
+	fmt.Printf("  RPC URL:       %s\n", rpcURL)
 	fmt.Println()
 	color.Cyan("Ledger Service:\n")
 	fmt.Printf("  Auto-advance interval: %v\n", ledgerInterval)
@@ -123,7 +133,7 @@ func nodeStart(ctx context.Context, manager *network.Manager) error {
 }
 
 // startLedgerDaemon spawns the ledger daemon as a background process
-func startLedgerDaemon(intervalMs int) error {
+func startLedgerDaemon(intervalMs int, rpcURL string) error {
 	// Get the path to the current executable
 	executable, err := os.Executable()
 	if err != nil {
@@ -143,7 +153,7 @@ func startLedgerDaemon(intervalMs int) error {
 
 	// Start the daemon process
 	cmd := exec.Command(executable, "_ledger-daemon",
-		"--rpc-url", DefaultLocalRPCURL,
+		"--rpc-url", rpcURL,
 		"--interval", strconv.Itoa(intervalMs),
 	)
 	cmd.Stdout = logFile
@@ -250,11 +260,23 @@ func nodeStatus(ctx context.Context, manager *network.Manager) error {
 	}
 
 	if status.Running {
+		// Resolve local network URLs from config
+		cfg, _ := config.LoadFromWorkingDir()
+		localCfg := config.NetworkConfig{
+			URL:    "ws://localhost:6006",
+			RPCURL: DefaultLocalRPCURL,
+		}
+		if cfg != nil {
+			if lc, ok := cfg.Networks["local"]; ok {
+				localCfg = lc
+			}
+		}
+
 		color.Green("✓ Local node is running\n")
 		fmt.Println()
 		color.Cyan("Connection Details:\n")
-		fmt.Println("  WebSocket URL: ws://localhost:6006")
-		fmt.Println("  RPC URL:       http://localhost:5005")
+		fmt.Printf("  WebSocket URL: %s\n", localCfg.URL)
+		fmt.Printf("  RPC URL:       %s\n", localCfg.GetRPCURL())
 		fmt.Println()
 
 		// Show ledger daemon status
diff --git a/internal/cli/rpc.go b/internal/cli/rpc.go
index 4700d29..51e3a4b 100644
--- a/internal/cli/rpc.go
+++ b/internal/cli/rpc.go
@@ -49,6 +49,7 @@ func runRPC(cmd *cobra.Command, args []string) error {
 		if rpcNetwork == "local" {
 			networkCfg = config.NetworkConfig{
 				URL:       "ws://localhost:6006",
+				RPCURL:    "http://localhost:5005",
 				NetworkID: 63456,
 			}
 		} else {
@@ -56,7 +57,7 @@ func runRPC(cmd *cobra.Command, args []string) error {
 		}
 	}
 
-	client := chain.NewClient(networkCfg.URL)
+	client := chain.NewClient(networkCfg.URL, networkCfg.GetRPCURL())
 	ctx := cmd.Context()
 
 	var params []interface{}
diff --git a/internal/cli/user_delete.go b/internal/cli/user_delete.go
index f7b42bd..e8e1196 100644
--- a/internal/cli/user_delete.go
+++ b/internal/cli/user_delete.go
@@ -53,7 +53,7 @@ func runUserDelete(cmd *cobra.Command, args []string) error {
 	networkCfg, ok := cfg.Networks[userDeleteNetwork]
 	if !ok {
 		if userDeleteNetwork == "local" {
-			networkCfg = config.NetworkConfig{URL: "ws://localhost:6006", NetworkID: 63456}
+			networkCfg = config.NetworkConfig{URL: "ws://localhost:6006", RPCURL: "http://localhost:5005", NetworkID: 63456}
 		} else {
 			return fmt.Errorf("network '%s' not found in config", userDeleteNetwork)
 		}
diff --git a/pkg/caller/caller.go b/pkg/caller/caller.go
index c954291..cb731f4 100644
--- a/pkg/caller/caller.go
+++ b/pkg/caller/caller.go
@@ -40,6 +40,10 @@ func (c *Caller) Call(ctx context.Context, config CallConfig) (*CallResult, erro
 		"verbose":          c.verbose,
 	}
 
+	if config.RPCURL != "" {
+		jsConfig["rpc_url"] = config.RPCURL
+	}
+
 	if config.ABIPath != "" {
 		jsConfig["abi_path"] = config.ABIPath
 	}
diff --git a/pkg/caller/types.go b/pkg/caller/types.go
index f38fc9f..aeb40fb 100644
--- a/pkg/caller/types.go
+++ b/pkg/caller/types.go
@@ -16,6 +16,7 @@ type CallConfig struct {
 	ContractAccount      string
 	FunctionName         string
 	NetworkURL           string
+	RPCURL               string // HTTP RPC URL (optional, derived from NetworkURL if empty)
 	NetworkID            uint32
 	WalletSeed           string
 	Algorithm            string
diff --git a/pkg/chain/client.go b/pkg/chain/client.go
index 5dabcb2..0dc8536 100644
--- a/pkg/chain/client.go
+++ b/pkg/chain/client.go
@@ -35,9 +35,13 @@ type RPCError struct {
 	Message string `json:"message"`
 }
 
-// NewClient creates a new XRPL RPC client from a WebSocket or HTTP URL
-func NewClient(url string) *Client {
+// NewClient creates a new XRPL RPC client from a WebSocket or HTTP URL.
+// An optional rpcURL can be provided to override the derived HTTP URL.
+func NewClient(url string, rpcURL ...string) *Client {
 	httpURL := toHTTPURL(url)
+	if len(rpcURL) > 0 && rpcURL[0] != "" {
+		httpURL = rpcURL[0]
+	}
 	return &Client{
 		httpURL: httpURL,
 		httpClient: &http.Client{
@@ -121,12 +125,12 @@ func (c *Client) CallTyped(ctx context.Context, target interface{}, method strin
 	return nil
 }
 
-// toHTTPURL converts a WebSocket URL to an HTTP URL for JSON-RPC
+// toHTTPURL converts a WebSocket URL to an HTTP URL for JSON-RPC.
+// This is a fallback conversion (ws:// -> http://, wss:// -> https://).
+// For local development where ports differ, use NetworkConfig.GetRPCURL() or pass rpcURL to NewClient.
 func toHTTPURL(rawURL string) string {
 	if strings.HasPrefix(rawURL, "ws://") {
 		rawURL = strings.Replace(rawURL, "ws://", "http://", 1)
-		// Local dev: WS port 6006 maps to JSON-RPC port 5005
-		rawURL = strings.Replace(rawURL, "localhost:6006", "localhost:5005", 1)
 	} else if strings.HasPrefix(rawURL, "wss://") {
 		rawURL = strings.Replace(rawURL, "wss://", "https://", 1)
 	}
diff --git a/pkg/config/types.go b/pkg/config/types.go
index 6874c23..8fad144 100644
--- a/pkg/config/types.go
+++ b/pkg/config/types.go
@@ -2,6 +2,7 @@ package config
 
 import (
 	"runtime"
+	"strings"
 	"time"
 )
 
@@ -33,11 +34,29 @@ type BuildConfig struct {
 
 type NetworkConfig struct {
 	URL       string `toml:"url"`
+	RPCURL    string `toml:"rpc_url,omitempty"`
 	NetworkID uint32 `toml:"network_id"`
 	FaucetURL string `toml:"faucet_url,omitempty"`
 	Explorer  string `toml:"explorer,omitempty"`
 }
 
+// GetRPCURL returns the RPC URL for this network.
+// If rpc_url is explicitly set, it is returned as-is.
+// Otherwise, the WebSocket URL is converted to HTTP (ws:// -> http://, wss:// -> https://).
+func (n NetworkConfig) GetRPCURL() string {
+	if n.RPCURL != "" {
+		return n.RPCURL
+	}
+	url := n.URL
+	if strings.HasPrefix(url, "ws://") {
+		return strings.Replace(url, "ws://", "http://", 1)
+	}
+	if strings.HasPrefix(url, "wss://") {
+		return strings.Replace(url, "wss://", "https://", 1)
+	}
+	return url
+}
+
 type ContractConfig struct {
 	Source string `toml:"source"`
 	ABI    string `toml:"abi"`
diff --git a/pkg/console/repl.go b/pkg/console/repl.go
index 87eecce..0d8c5c9 100644
--- a/pkg/console/repl.go
+++ b/pkg/console/repl.go
@@ -29,7 +29,7 @@ type REPL struct {
 func NewREPL(cfg *config.Config, contractAccount string, walletSeed string, networkCfg config.NetworkConfig) *REPL {
 	return &REPL{
 		cfg:             cfg,
-		client:          chain.NewClient(networkCfg.URL),
+		client:          chain.NewClient(networkCfg.URL, networkCfg.GetRPCURL()),
 		contractAccount: contractAccount,
 		walletSeed:      walletSeed,
 		networkCfg:      networkCfg,
diff --git a/pkg/deployer/deployer.go b/pkg/deployer/deployer.go
index 20c497f..32507c0 100644
--- a/pkg/deployer/deployer.go
+++ b/pkg/deployer/deployer.go
@@ -39,6 +39,10 @@ func (d *Deployer) Deploy(ctx context.Context, config DeploymentConfig) (*Deploy
 		"verbose":     d.verbose,
 	}
 
+	if config.RPCURL != "" {
+		jsConfig["rpc_url"] = config.RPCURL
+	}
+
 	if config.WalletSeed != "" {
 		jsConfig["wallet_seed"] = config.WalletSeed
 	}
diff --git a/pkg/deployer/types.go b/pkg/deployer/types.go
index 6b568af..048da16 100644
--- a/pkg/deployer/types.go
+++ b/pkg/deployer/types.go
@@ -16,6 +16,7 @@ type DeploymentConfig struct {
 	WasmPath       string
 	ABIPath        string
 	NetworkURL     string
+	RPCURL         string // HTTP RPC URL (optional, derived from NetworkURL if empty)
 	NetworkID      uint32
 	WalletSeed     string
 	Algorithm      string
diff --git a/pkg/script/runner.go b/pkg/script/runner.go
index 58cb8a2..4bef09b 100644
--- a/pkg/script/runner.go
+++ b/pkg/script/runner.go
@@ -278,6 +278,7 @@ func (r *Runner) resolveNetwork(name string) config.NetworkConfig {
 	if name == "local" {
 		return config.NetworkConfig{
 			URL:       "ws://localhost:6006",
+			RPCURL:    "http://localhost:5005",
 			NetworkID: 63456,
 		}
 	}
diff --git a/pkg/tester/fuzzer.go b/pkg/tester/fuzzer.go
index 9598947..7f064c7 100644
--- a/pkg/tester/fuzzer.go
+++ b/pkg/tester/fuzzer.go
@@ -57,6 +57,7 @@ func (f *Fuzzer) Run(ctx context.Context, contractAccount string, walletSeed str
 		if networkName == "local" {
 			networkCfg = config.NetworkConfig{
 				URL:       "ws://localhost:6006",
+				RPCURL:    "http://localhost:5005",
 				NetworkID: 63456,
 			}
 		} else {
diff --git a/pkg/tester/integration.go b/pkg/tester/integration.go
index 5a2216b..20bf746 100644
--- a/pkg/tester/integration.go
+++ b/pkg/tester/integration.go
@@ -110,6 +110,7 @@ func (r *IntegrationRunner) runSuite(ctx context.Context, suite *IntegrationTest
 		if networkName == "local" {
 			networkCfg = config.NetworkConfig{
 				URL:       "ws://localhost:6006",
+				RPCURL:    "http://localhost:5005",
 				NetworkID: 63456,
 			}
 		} else {
diff --git a/pkg/tester/invariant.go b/pkg/tester/invariant.go
index 42ba9d0..0a171cd 100644
--- a/pkg/tester/invariant.go
+++ b/pkg/tester/invariant.go
@@ -57,6 +57,7 @@ func (r *InvariantRunner) Run(ctx context.Context, contractAccount string, walle
 		if networkName == "local" {
 			networkCfg = config.NetworkConfig{
 				URL:       "ws://localhost:6006",
+				RPCURL:    "http://localhost:5005",
 				NetworkID: 63456,
 			}
 		} else {