# Support Endpoints Migration

#### Endpoint Migration Table

| Category          | Previous Endpoint `backend-{chain}.gains.trade` | New Endpoint `backend-global.gains.trade`                          | Notes                                                |
| ----------------- | ----------------------------------------------- | ------------------------------------------------------------------ | ---------------------------------------------------- |
| **Leaderboard**   | `/leaderboard/:period`                          | `/api/leaderboard/:period?chainId={chainId}`                       | `chainId` is now a required query parameter.         |
| **Referrals**     | `/referrals/links/:link/address`                | `/api/referrals/links/:link/address`                               | Base path moved to `/api/referrals`.                 |
|                   | `/referrals/addresses/:address/link`            | `/api/referrals/addresses/:address/link`                           |                                                      |
| **Holding Rates** | `/holding-rates/:collateralIndex/:pairIndex`    | `/api/holding-rates/:collateralIndex/:pairIndex?chainId={chainId}` | `chainId` is now a required query parameter.         |
| **Stats**         | `/stats`                                        | `/api/stats?chainId={chainId}`                                     | `chainId` is now a required query parameter.         |
| **APR**           | `/apr`                                          | `/api/apr?chainId={chainId}`                                       | `chainId` is now a required query parameter.         |
| **Total Supply**  | `/total-supply`                                 | `/api/total-supply`                                                | No `chainId` required (always returns total supply). |

#### Timeline

Please migrate endpoints by Jan 12 2026