diff --git a/src/main/java/com/trunksbomb/trade/client/TradeScreen.java b/src/main/java/com/trunksbomb/trade/client/TradeScreen.java
index da56a5e..b08eab5 100644
--- a/src/main/java/com/trunksbomb/trade/client/TradeScreen.java
+++ b/src/main/java/com/trunksbomb/trade/client/TradeScreen.java
@@ -12,6 +12,7 @@ import java.util.List;
 import java.util.UUID;
 import net.minecraft.client.gui.GuiGraphics;
 import net.minecraft.client.gui.components.Button;
+import net.minecraft.client.gui.components.EditBox;
 import net.minecraft.client.gui.screens.inventory.AbstractContainerScreen;
 import net.minecraft.network.chat.Component;
 import net.minecraft.resources.ResourceLocation;
@@ -47,7 +48,11 @@ public class TradeScreen extends AbstractContainerScreen<TradeScreen.TradeMenu>
     private static final int DEBUG_BUTTON_HEIGHT = 20;
     private static final int DEBUG_BUTTON_GAP = 4;
     private static final int DEBUG_SMALL_BUTTON_WIDTH = 41;
+    private static final int AMOUNT_PROMPT_WIDTH = 90;
+    private static final int AMOUNT_PROMPT_HEIGHT = 44;
     private ContextMenu contextMenu;
+    private EditBox amountInput;
+    private AmountPrompt amountPrompt;
 
     public TradeScreen(TradeMenu menu, Inventory inventory, Component title) {
         super(menu, inventory, title);
@@ -70,6 +75,12 @@ public class TradeScreen extends AbstractContainerScreen<TradeScreen.TradeMenu>
         super.init();
         titleLabelX = BANNER_X;
         titleLabelY = BANNER_Y;
+        amountInput = new EditBox(font, leftPos + 0, topPos + 0, 54, 14, Component.literal("Trade Amount"));
+        amountInput.setVisible(false);
+        amountInput.setCanLoseFocus(false);
+        amountInput.setMaxLength(3);
+        amountInput.setFilter(value -> value.isEmpty() || value.chars().allMatch(Character::isDigit));
+        addRenderableWidget(amountInput);
 
         addRenderableWidget(Button.builder(Component.literal("Accept"), button -> sendAction(TradeAction.ACCEPT, -1, 1))
                 .bounds(leftPos + CENTER_COLUMN_X + 3, topPos + ACCEPT_BUTTON_Y, ACTION_BUTTON_WIDTH, ACTION_BUTTON_HEIGHT)
@@ -110,6 +121,19 @@ public class TradeScreen extends AbstractContainerScreen<TradeScreen.TradeMenu>
 
     @Override
     public boolean keyPressed(int keyCode, int scanCode, int modifiers) {
+        if (amountPrompt != null) {
+            if (keyCode == 256) {
+                closeAmountPrompt();
+                return true;
+            }
+            if (keyCode == 257 || keyCode == 335) {
+                submitAmountPrompt();
+                return true;
+            }
+            if (amountInput != null && amountInput.keyPressed(keyCode, scanCode, modifiers)) {
+                return true;
+            }
+        }
         if (minecraft != null && minecraft.options.keyInventory.matches(keyCode, scanCode)) {
             onClose();
             return true;
@@ -130,6 +154,17 @@ public class TradeScreen extends AbstractContainerScreen<TradeScreen.TradeMenu>
 
     @Override
     public boolean mouseClicked(double mouseX, double mouseY, int button) {
+        if (amountPrompt != null) {
+            if (isInsideAmountPrompt(mouseX, mouseY)) {
+                if (amountInput != null && amountInput.mouseClicked(mouseX, mouseY, button)) {
+                    return true;
+                }
+                return true;
+            }
+            closeAmountPrompt();
+            return true;
+        }
+
         if (contextMenu != null) {
             if (handleContextMenuClick(mouseX, mouseY)) {
                 return true;
@@ -197,6 +232,7 @@ public class TradeScreen extends AbstractContainerScreen<TradeScreen.TradeMenu>
     public void render(GuiGraphics guiGraphics, int mouseX, int mouseY, float partialTick) {
         super.render(guiGraphics, mouseX, mouseY, partialTick);
         renderContextMenu(guiGraphics, mouseX, mouseY);
+        renderAmountPrompt(guiGraphics);
         renderTooltip(guiGraphics, mouseX, mouseY);
     }
 
@@ -274,9 +310,7 @@ public class TradeScreen extends AbstractContainerScreen<TradeScreen.TradeMenu>
 
         ContextOption option = contextMenu.options().get(index);
         if (option.amount() < 0) {
-            if (minecraft != null && minecraft.player != null) {
-                minecraft.player.displayClientMessage(Component.literal(option.label() + " is not implemented yet."), true);
-            }
+            openAmountPrompt(contextMenu.action(), contextMenu.slot(), contextMenu.mouseX(), contextMenu.mouseY());
         } else {
             sendAction(contextMenu.action(), contextMenu.slot(), option.amount());
         }
@@ -314,6 +348,84 @@ public class TradeScreen extends AbstractContainerScreen<TradeScreen.TradeMenu>
         pose.popPose();
     }
 
+    private void openAmountPrompt(TradeAction action, int slot, int mouseX, int mouseY) {
+        amountPrompt = new AmountPrompt(action, slot, mouseX, mouseY);
+        if (amountInput != null) {
+            amountInput.setValue("");
+            amountInput.setFocused(true);
+            amountInput.setVisible(true);
+            setFocused(amountInput);
+        }
+    }
+
+    private void submitAmountPrompt() {
+        if (amountPrompt == null || amountInput == null) {
+            return;
+        }
+
+        String value = amountInput.getValue().trim();
+        if (value.isEmpty()) {
+            return;
+        }
+
+        try {
+            int amount = Integer.parseInt(value);
+            if (amount > 0) {
+                sendAction(amountPrompt.action(), amountPrompt.slot(), amount);
+                closeAmountPrompt();
+            }
+        } catch (NumberFormatException ignored) {
+            // Filter should prevent this, but ignore invalid input safely.
+        }
+    }
+
+    private void closeAmountPrompt() {
+        amountPrompt = null;
+        if (amountInput != null) {
+            amountInput.setValue("");
+            amountInput.setFocused(false);
+            amountInput.setVisible(false);
+        }
+        setFocused(null);
+    }
+
+    private void renderAmountPrompt(GuiGraphics guiGraphics) {
+        if (amountPrompt == null || amountInput == null) {
+            return;
+        }
+
+        var pose = guiGraphics.pose();
+        pose.pushPose();
+        pose.translate(0.0F, 0.0F, 450.0F);
+
+        int promptX = amountPromptX();
+        int promptY = amountPromptY();
+        guiGraphics.fill(promptX, promptY, promptX + AMOUNT_PROMPT_WIDTH, promptY + AMOUNT_PROMPT_HEIGHT, 0xF0101010);
+        guiGraphics.fill(promptX + 1, promptY + 1, promptX + AMOUNT_PROMPT_WIDTH - 1, promptY + AMOUNT_PROMPT_HEIGHT - 1, 0xFF2B2B2B);
+        guiGraphics.drawString(font, amountPrompt.action() == TradeAction.ADD_ITEM ? "Trade amount" : "Remove amount", promptX + 6, promptY + 6, 0xFFFFFF, false);
+        guiGraphics.drawString(font, "Enter to confirm", promptX + 6, promptY + 30, 0xAAAAAA, false);
+
+        amountInput.setPosition(promptX + 6, promptY + 16);
+        amountInput.render(guiGraphics, 0, 0, 0.0F);
+        pose.popPose();
+    }
+
+    private boolean isInsideAmountPrompt(double mouseX, double mouseY) {
+        int promptX = amountPromptX();
+        int promptY = amountPromptY();
+        return mouseX >= promptX && mouseX < promptX + AMOUNT_PROMPT_WIDTH && mouseY >= promptY && mouseY < promptY + AMOUNT_PROMPT_HEIGHT;
+    }
+
+    private int amountPromptX() {
+        int preferredX = amountPrompt == null ? leftPos + 8 : Math.min(amountPrompt.mouseX(), this.width - AMOUNT_PROMPT_WIDTH - 4);
+        return Math.max(4, preferredX);
+    }
+
+    private int amountPromptY() {
+        int preferredY = amountPrompt == null ? topPos + 8 : Math.min(amountPrompt.mouseY(), this.height - AMOUNT_PROMPT_HEIGHT - 4);
+        return Math.max(4, preferredY);
+    }
+
     private int contextMenuX() {
         int width = contextMenuWidth();
         return Math.min(contextMenu.mouseX(), this.width - width - 4);
@@ -349,6 +461,8 @@ public class TradeScreen extends AbstractContainerScreen<TradeScreen.TradeMenu>
 
     private record ContextOption(String label, int amount) {}
 
+    private record AmountPrompt(TradeAction action, int slot, int mouseX, int mouseY) {}
+
     public static class TradeMenu extends AbstractContainerMenu {
         private static final int OFFER_COLUMNS = 6;
         private static final int OFFER_ROWS = 6;