diff --git a/src/controllers/api/guildTechController.ts b/src/controllers/api/guildTechController.ts
index 7d27267b1..340226993 100644
--- a/src/controllers/api/guildTechController.ts
+++ b/src/controllers/api/guildTechController.ts
@@ -2,7 +2,7 @@ import { RequestHandler } from "express";
 import { getGuildForRequestEx } from "@/src/services/guildService";
 import { ExportDojoRecipes } from "warframe-public-export-plus";
 import { getAccountIdForRequest } from "@/src/services/loginService";
-import { addMiscItems, getInventory, updateCurrency } from "@/src/services/inventoryService";
+import { addMiscItems, addRecipes, getInventory, updateCurrency } from "@/src/services/inventoryService";
 import { IMiscItem } from "@/src/types/inventoryTypes/inventoryTypes";
 import { IInventoryChanges } from "@/src/types/purchaseTypes";
 
@@ -11,11 +11,12 @@ export const guildTechController: RequestHandler = async (req, res) => {
     const inventory = await getInventory(accountId);
     const guild = await getGuildForRequestEx(req, inventory);
     const data = JSON.parse(String(req.body)) as TGuildTechRequest;
-    if (data.Action == "Sync") {
+    const action = data.Action.split(",")[0];
+    if (action == "Sync") {
         res.json({
             TechProjects: guild.toJSON().TechProjects
         });
-    } else if (data.Action == "Start") {
+    } else if (action == "Start") {
         const recipe = ExportDojoRecipes.research[data.RecipeType!];
         guild.TechProjects ??= [];
         if (!guild.TechProjects.find(x => x.ItemType == data.RecipeType)) {
@@ -31,7 +32,7 @@ export const guildTechController: RequestHandler = async (req, res) => {
         }
         await guild.save();
         res.end();
-    } else if (data.Action == "Contribute") {
+    } else if (action == "Contribute") {
         const contributions = data as IGuildTechContributeFields;
         const techProject = guild.TechProjects!.find(x => x.ItemType == contributions.RecipeType)!;
         if (contributions.RegularCredits > techProject.ReqCredits) {
@@ -70,6 +71,30 @@ export const guildTechController: RequestHandler = async (req, res) => {
         res.json({
             InventoryChanges: inventoryChanges
         });
+    } else if (action == "Buy") {
+        const purchase = data as IGuildTechBuyFields;
+        const quantity = parseInt(data.Action.split(",")[1]);
+        const inventory = await getInventory(accountId);
+        const recipeChanges = [
+            {
+                ItemType: purchase.RecipeType,
+                ItemCount: quantity
+            }
+        ];
+        addRecipes(inventory, recipeChanges);
+        const currencyChanges = updateCurrency(
+            inventory,
+            ExportDojoRecipes.research[purchase.RecipeType].replicatePrice,
+            false
+        );
+        await inventory.save();
+        // Not a mistake: This response uses `inventoryChanges` instead of `InventoryChanges`.
+        res.json({
+            inventoryChanges: {
+                ...currencyChanges,
+                Recipes: recipeChanges
+            }
+        });
     } else {
         throw new Error(`unknown guildTech action: ${data.Action}`);
     }
@@ -85,6 +110,8 @@ interface IGuildTechStartFields {
     RecipeType: string;
 }
 
+type IGuildTechBuyFields = IGuildTechStartFields;
+
 interface IGuildTechContributeFields {
     ResearchId: "";
     RecipeType: string;