diff --git a/api/auth/exchange-token.ts b/api/auth/exchange-token.ts
index 142169dc..aab91363 100644
--- a/api/auth/exchange-token.ts
+++ b/api/auth/exchange-token.ts
@@ -47,7 +47,7 @@ export default async function handler(req: VercelRequest, res: VercelResponse) {
       });
     }
 
-    const tokenData = await tokenResponse.json();
+    const tokenData = (await tokenResponse.json()) as { access_token?: string; user?: { id: string } };
 
     if (!tokenData.access_token) {
       return res.status(400).json({ error: "No access token in response" });
diff --git a/api/auth/foundation-callback.ts b/api/auth/foundation-callback.ts
index 68aa47e1..7cc10bf8 100644
--- a/api/auth/foundation-callback.ts
+++ b/api/auth/foundation-callback.ts
@@ -20,6 +20,7 @@ interface FoundationTokenResponse {
     id: string;
     email: string;
     username: string;
+    full_name?: string;
     profile_complete: boolean;
   };
 }
diff --git a/api/ethos/licensing-notifications.ts b/api/ethos/licensing-notifications.ts
index 19079f8d..c196f865 100644
--- a/api/ethos/licensing-notifications.ts
+++ b/api/ethos/licensing-notifications.ts
@@ -209,9 +209,9 @@ export default async function handler(req: any, res: any) {
           return res.status(404).json({ error: "Agreement not found" });
         }
 
-        const licensee = agreement.user_profiles?.[0];
-        const artist = agreement.ethos_tracks?.user_profiles?.[0];
-        const trackTitle = agreement.ethos_tracks?.title;
+        const licensee = (agreement as any).user_profiles?.[0];
+        const artist = (agreement as any).ethos_tracks?.user_profiles?.[0];
+        const trackTitle = (agreement as any).ethos_tracks?.title;
 
         if (!licensee?.email) {
           return res.status(400).json({ error: "Licensee email not found" });
diff --git a/api/gameforge/builds.ts b/api/gameforge/builds.ts
index 01cbd3ca..583ebb9b 100644
--- a/api/gameforge/builds.ts
+++ b/api/gameforge/builds.ts
@@ -132,7 +132,7 @@ export default async function handler(req: any, res: any) {
         .eq("id", id)
         .single();
 
-      if (build?.gameforge_projects?.lead_id !== userId) {
+      if ((build?.gameforge_projects as any)?.lead_id !== userId) {
         return res
           .status(403)
           .json({ error: "Only project lead can update builds" });
diff --git a/api/games/roblox-auth.ts b/api/games/roblox-auth.ts
index d8d6dee9..854736df 100644
--- a/api/games/roblox-auth.ts
+++ b/api/games/roblox-auth.ts
@@ -102,7 +102,7 @@ export default async function handler(req: VercelRequest, res: VercelResponse) {
       success: true,
       game_token: gameToken,
       user_id: userData.id,
-      username: userData.username || roblox_username,
+      username: (userData as any).username || roblox_username,
       expires_in: 86400, // seconds
     });
   } catch (error: any) {
diff --git a/api/github/oauth/callback.ts b/api/github/oauth/callback.ts
index e51ebc38..7c1299f1 100644
--- a/api/github/oauth/callback.ts
+++ b/api/github/oauth/callback.ts
@@ -179,8 +179,8 @@ export default async function handler(req: any, res: any) {
       });
 
       if (emailResponse.ok) {
-        const emails = await emailResponse.json();
-        const primaryEmail = emails.find((e: any) => e.primary);
+        const emails = (await emailResponse.json()) as Array<{ email: string; primary: boolean }>;
+        const primaryEmail = emails.find((e) => e.primary);
         email = primaryEmail?.email || emails[0]?.email;
       }
     }
diff --git a/api/integrations/fourthwall.ts b/api/integrations/fourthwall.ts
index c8988479..9bef8781 100644
--- a/api/integrations/fourthwall.ts
+++ b/api/integrations/fourthwall.ts
@@ -136,7 +136,7 @@ async function handleSyncProducts(req: any, res: any) {
       throw new Error(`Failed to fetch products: ${response.statusText}`);
     }
 
-    const data = await response.json();
+    const data = (await response.json()) as { products?: FourthwallProduct[] };
     const products: FourthwallProduct[] = data.products || [];
 
     // Sync products to Supabase
diff --git a/api/nexus/payments/confirm-payment.ts b/api/nexus/payments/confirm-payment.ts
index da49024a..e987d85d 100644
--- a/api/nexus/payments/confirm-payment.ts
+++ b/api/nexus/payments/confirm-payment.ts
@@ -3,7 +3,7 @@ import Stripe from "stripe";
 import { getAdminClient } from "../../_supabase.js";
 
 const stripe = new Stripe(process.env.STRIPE_SECRET_KEY || "", {
-  apiVersion: "2024-11-20",
+  apiVersion: "2024-04-10",
 });
 
 export default async function handler(req: VercelRequest, res: VercelResponse) {
diff --git a/api/nexus/payments/create-intent.ts b/api/nexus/payments/create-intent.ts
index a7385274..e4f7998e 100644
--- a/api/nexus/payments/create-intent.ts
+++ b/api/nexus/payments/create-intent.ts
@@ -3,7 +3,7 @@ import Stripe from "stripe";
 import { getAdminClient } from "../../_supabase.js";
 
 const stripe = new Stripe(process.env.STRIPE_SECRET_KEY || "", {
-  apiVersion: "2024-11-20",
+  apiVersion: "2024-04-10",
 });
 
 export default async function handler(req: VercelRequest, res: VercelResponse) {
diff --git a/api/nexus/payments/payout-setup.ts b/api/nexus/payments/payout-setup.ts
index b891dc72..bc31bcfe 100644
--- a/api/nexus/payments/payout-setup.ts
+++ b/api/nexus/payments/payout-setup.ts
@@ -3,7 +3,7 @@ import Stripe from "stripe";
 import { getAdminClient } from "../../_supabase.js";
 
 const stripe = new Stripe(process.env.STRIPE_SECRET_KEY || "", {
-  apiVersion: "2024-11-20",
+  apiVersion: "2024-04-10",
 });
 
 const apiBase = process.env.VITE_API_BASE || "https://aethex.dev";
diff --git a/api/nexus/payments/webhook.ts b/api/nexus/payments/webhook.ts
index 8fcbfc03..7e58b242 100644
--- a/api/nexus/payments/webhook.ts
+++ b/api/nexus/payments/webhook.ts
@@ -3,7 +3,7 @@ import Stripe from "stripe";
 import { getAdminClient } from "../../_supabase.js";
 
 const stripe = new Stripe(process.env.STRIPE_SECRET_KEY || "", {
-  apiVersion: "2024-11-20",
+  apiVersion: "2024-04-10",
 });
 
 const webhookSecret = process.env.STRIPE_WEBHOOK_SECRET || "";
diff --git a/api/user/arm-affiliations.ts b/api/user/arm-affiliations.ts
index 3784f2fc..877f48ae 100644
--- a/api/user/arm-affiliations.ts
+++ b/api/user/arm-affiliations.ts
@@ -87,7 +87,7 @@ export default async (req: Request) => {
 
     // DELETE - Remove arm affiliation
     if (req.method === "DELETE") {
-      const body = await req.json();
+      const body = (await req.json()) as { arm: string; affiliation_type?: string };
       const { arm, affiliation_type } = body;
 
       if (!VALID_ARMS.includes(arm)) {