{"service":"Flipkart Seller OAuth","endpoints":{"POST /login":"{seller_id, password} -> automated login + tokens","GET /login-redirect":"browser redirect flow (manual)","GET /callback":"OAuth callback (called by Flipkart)","POST /refresh":"{seller_id} OR {refresh_token} -> new tokens","GET /refresh?seller_id=... OR ?refresh_token=...":"same as POST /refresh","GET /tokens":"all cached seller tokens","GET /tokens?seller_id=...":"tokens for specific seller"}}