diff --git a/remix-simulator/bin/ethsim b/remix-simulator/bin/ethsim
index a1257b98d6..a6f56641ee 100755
--- a/remix-simulator/bin/ethsim
+++ b/remix-simulator/bin/ethsim
@@ -24,12 +24,14 @@ program
   .option('-b, --ip [host]', 'specify host')
   .option('-c, --coinbase [coinbase]', 'specify host')
   .option('--rpc', 'run rpc server only')
+  .option('--details', 'display payloads for every requests and their responses')
   .parse(process.argv)
 
 const Server = require('../src/server')
 const server = new Server({
   coinbase: program.coinbase || "0x0000000000000000000000000000000000000000",
-  rpc: program.rpc
+  rpc: program.rpc,
+  logDetails: program.details
 })
 server.start(program.host || '127.0.0.1', program.port || 8545)
 
diff --git a/remix-simulator/src/provider.js b/remix-simulator/src/provider.js
index 6b5d6ee007..65bf01b618 100644
--- a/remix-simulator/src/provider.js
+++ b/remix-simulator/src/provider.js
@@ -14,6 +14,7 @@ const Transactions = require('./methods/transactions.js')
 const generateBlock = require('./genesis.js')
 
 var Provider = function (options) {
+  this.options = options || {}
   this.Accounts = new Accounts()
   this.Transactions = new Transactions()
 
@@ -38,8 +39,15 @@ Provider.prototype.sendAsync = function (payload, callback) {
   log.info('payload method is ', payload.method)
 
   let method = this.methods[payload.method]
+  if (this.options.logDetails) {
+    log.info(payload)
+  }
   if (method) {
     return method.call(method, payload, (err, result) => {
+      if (this.options.logDetails) {
+        log.info(err)
+        log.info(result)
+      }
       if (err) {
         return callback(err)
       }