diff --git a/src/lib/auth/oauth.ts b/src/lib/auth/oauth.ts
index 9f1a442..dfe3181 100644
--- a/src/lib/auth/oauth.ts
+++ b/src/lib/auth/oauth.ts
@@ -33,7 +33,7 @@ export const vkOAuthConfig = {
   clientId: process.env.VK_CLIENT_ID || '',
   clientSecret: process.env.VK_CLIENT_SECRET || '',
   authUrl: 'https://id.vk.com/oauth2/auth',
-  tokenUrl: 'https://id.vk.ru/oauth2/auth',
+  tokenUrl: 'https://id.vk.com/oauth2/auth',
   scope: 'email phone',
 };
 
diff --git a/src/pages/api/auth/callback/vk.ts b/src/pages/api/auth/callback/vk.ts
index e6abc39..62cbe50 100644
--- a/src/pages/api/auth/callback/vk.ts
+++ b/src/pages/api/auth/callback/vk.ts
@@ -20,6 +20,7 @@ export const GET: APIRoute = async ({ url, request }) => {
   const storedState = getCookieValue(cookieHeader, 'oauth_state');
 
   if (!code || !state || !verifier || state !== storedState) {
+    console.error('[OAuth VK] Validation failed:', { hasCode: !!code, hasState: !!state, hasVerifier: !!verifier, stateMatch: state === storedState });
     return new Response(JSON.stringify({ error: 'Invalid or missing parameters' }), {
       status: 400,
       headers: { 'Content-Type': 'application/json' },
@@ -42,7 +43,9 @@ export const GET: APIRoute = async ({ url, request }) => {
   });
 
   if (!tokenRes.ok) {
-    return new Response(JSON.stringify({ error: 'Token exchange failed' }), {
+    const errorText = await tokenRes.text();
+    console.error('[OAuth VK] Token exchange failed:', tokenRes.status, errorText);
+    return new Response(JSON.stringify({ error: 'Token exchange failed', details: errorText }), {
       status: 500,
       headers: { 'Content-Type': 'application/json' },
     });
diff --git a/src/pages/api/auth/callback/yandex.ts b/src/pages/api/auth/callback/yandex.ts
index 1174c63..8a40ca9 100644
--- a/src/pages/api/auth/callback/yandex.ts
+++ b/src/pages/api/auth/callback/yandex.ts
@@ -20,6 +20,7 @@ export const GET: APIRoute = async ({ url, request }) => {
   const storedState = getCookieValue(cookieHeader, 'oauth_state');
 
   if (!code || !state || !verifier || state !== storedState) {
+    console.error('[OAuth Yandex] Validation failed:', { hasCode: !!code, hasState: !!state, hasVerifier: !!verifier, stateMatch: state === storedState });
     return new Response(JSON.stringify({ error: 'Invalid or missing parameters' }), {
       status: 400,
       headers: { 'Content-Type': 'application/json' },
@@ -43,7 +44,9 @@ export const GET: APIRoute = async ({ url, request }) => {
   });
 
   if (!tokenRes.ok) {
-    return new Response(JSON.stringify({ error: 'Token exchange failed' }), {
+    const errorText = await tokenRes.text();
+    console.error('[OAuth Yandex] Token exchange failed:', tokenRes.status, errorText);
+    return new Response(JSON.stringify({ error: 'Token exchange failed', details: errorText }), {
       status: 500,
       headers: { 'Content-Type': 'application/json' },
     });