diff --git a/README.md b/README.md
index efae697..a544e41 100755
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ A PHP-based Telegram tip bot for the Salvium (Monero fork) cryptocurrency.
 ## Commands
 - `/withdraw <address> <amount>` withdraws `SAL1`
 - `/withdraw <asset> <address> <amount>` withdraws `SAL1` or a token asset, for example `CULT`/`salCULT`
-- `/unsweep <asset> <outputs>` admin-only command that self-transfers unlocked wallet funds into multiple smaller outputs
+- `/unsweep <asset> <outputs> [amount]` admin-only command that self-transfers unlocked wallet funds into multiple smaller outputs
 
 ## Withdrawal fees
 - `WITHDRAWAL_FEE` is charged in `SAL1` for `SAL1` withdrawals.
diff --git a/src/salvium_tipbot_commands.php b/src/salvium_tipbot_commands.php
index 519b7d6..abf4bf8 100644
--- a/src/salvium_tipbot_commands.php
+++ b/src/salvium_tipbot_commands.php
@@ -266,9 +266,9 @@ class SalviumTipBotCommands {
         }
 
         try {
-            [$assetType, $outputCount] = $this->parseUnsweepArgs($args);
+            [$assetType, $outputCount, $requestedAmountAtomic] = $this->parseUnsweepArgs($args);
         } catch (Throwable $e) {
-            return "Usage: /unsweep <asset> <outputs>";
+            return "Usage: /unsweep <asset> <outputs> [amount]";
         }
 
         $maxOutputs = max(2, (int)($this->config['MAX_UNSWEEP_OUTPUTS'] ?? 100));
@@ -315,7 +315,11 @@ class SalviumTipBotCommands {
             $reserveAtomic = $this->humanToAtomic($this->config['UNSWEEP_SAL1_FEE_RESERVE'] ?? 0.5);
         }
 
-        $spendableAtomic = $unlockedAtomic - $reserveAtomic;
+        $spendableAtomic = $requestedAmountAtomic ?? ($unlockedAtomic - $reserveAtomic);
+        if ($requestedAmountAtomic !== null && $spendableAtomic > ($unlockedAtomic - $reserveAtomic)) {
+            return "Requested amount exceeds spendable unlocked {$assetType}. Max is " . $this->atomicToHuman(max(0, $unlockedAtomic - $reserveAtomic)) . " {$assetType}.";
+        }
+
         if ($spendableAtomic <= 0) {
             return "No spendable {$assetType} after fee reserve of " . $this->atomicToHuman($reserveAtomic) . " {$assetType}.";
         }
@@ -346,8 +350,9 @@ class SalviumTipBotCommands {
 
         $totalAtomic = $amountPerOutputAtomic * $outputCount;
         $reserveText = $reserveAtomic > 0 ? " Reserved " . $this->atomicToHuman($reserveAtomic) . " {$assetType} for fee/change." : "";
+        $sourceText = $requestedAmountAtomic !== null ? " Requested " . $this->atomicToHuman($requestedAmountAtomic) . " {$assetType}." : "";
         return "Unswept " . $this->atomicToHuman($totalAtomic) . " {$assetType} into {$outputCount} outputs of "
-            . $this->atomicToHuman($amountPerOutputAtomic) . " {$assetType}.{$reserveText} "
+            . $this->atomicToHuman($amountPerOutputAtomic) . " {$assetType}.{$sourceText}{$reserveText} "
             . $this->formatTxids($txids);
     }
 
@@ -492,7 +497,7 @@ class SalviumTipBotCommands {
     }
 
     private function parseUnsweepArgs(array $args): array {
-        if (count($args) !== 3 || !$this->looksLikeAssetType($args[1]) || !ctype_digit((string)$args[2])) {
+        if (!in_array(count($args), [3, 4], true) || !$this->looksLikeAssetType($args[1]) || !ctype_digit((string)$args[2])) {
             throw new InvalidArgumentException("Invalid /unsweep arguments");
         }
 
@@ -501,7 +506,18 @@ class SalviumTipBotCommands {
             throw new InvalidArgumentException("Invalid /unsweep output count");
         }
 
-        return [$this->parseAssetType($args[1]), $outputCount];
+        $requestedAmountAtomic = null;
+        if (count($args) === 4) {
+            if (!is_numeric($args[3]) || (float)$args[3] <= 0) {
+                throw new InvalidArgumentException("Invalid /unsweep amount");
+            }
+            $requestedAmountAtomic = $this->humanToAtomic($args[3]);
+            if ($requestedAmountAtomic <= 0) {
+                throw new InvalidArgumentException("Invalid /unsweep amount");
+            }
+        }
+
+        return [$this->parseAssetType($args[1]), $outputCount, $requestedAmountAtomic];
     }
 
     private function atomicSubtractNonNegative(string $left, string $right): string {