diff --git a/CHANGELOG.md b/CHANGELOG.md
index 39d1e26b..26e9a4fd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -29,6 +29,7 @@ Master list of UniV3 forks:
   26. Swapr (Algebra-like)
   27. SpookySwap
   28. Wagmi
+  29. SwapX (Algebra-like)
 
 ---
 
@@ -59,6 +60,7 @@ Master list of UniV3 forks:
 * Add `rebateClaimer()(address)` function on Mainnet Settlers for gas rebate program
 * Add SolidlyV3 UniV3 fork to Sonic
 * Add Wagmi UniV3 fork to Sonic
+* Add SwapX UniV3 (Algebra style) fork to Sonic
 
 ## 2024-12-18
 
diff --git a/src/chains/Mode/Common.sol b/src/chains/Mode/Common.sol
index b13c1efa..30adbc7c 100644
--- a/src/chains/Mode/Common.sol
+++ b/src/chains/Mode/Common.sol
@@ -14,8 +14,8 @@ import {
     supSwapV3ForkId,
     ISupSwapV3Callback
 } from "../../core/univ3forks/SupSwapV3.sol";
-import {kimFactory, kimInitHash, kimForkId} from "../../core/univ3forks/Kim.sol";
-import {IAlgebraCallback} from "../../core/univ3forks/Algebra.sol";
+import {kimFactory, kimForkId} from "../../core/univ3forks/Kim.sol";
+import {algebraV4InitHash, IAlgebraCallback} from "../../core/univ3forks/Algebra.sol";
 import {swapModeV3Factory, swapModeV3InitHash, swapModeV3ForkId} from "../../core/univ3forks/SwapModeV3.sol";
 import {IUniswapV3Callback} from "../../core/univ3forks/UniswapV3.sol";
 
@@ -63,7 +63,7 @@ abstract contract ModeMixin is FreeMemory, SettlerBase {
             callbackSelector = uint32(ISupSwapV3Callback.supV3SwapCallback.selector);
         } else if (forkId == kimForkId) {
             factory = kimFactory;
-            initHash = kimInitHash;
+            initHash = algebraV4InitHash;
             callbackSelector = uint32(IAlgebraCallback.algebraSwapCallback.selector);
         } else if (forkId == swapModeV3ForkId) {
             factory = swapModeV3Factory;
diff --git a/src/chains/Sonic/Common.sol b/src/chains/Sonic/Common.sol
index 11695e1c..63c3cceb 100644
--- a/src/chains/Sonic/Common.sol
+++ b/src/chains/Sonic/Common.sol
@@ -24,6 +24,8 @@ import {
 } from "../../core/univ3forks/SolidlyV3.sol";
 import {spookySwapFactory, spookySwapForkId} from "../../core/univ3forks/SpookySwap.sol";
 import {wagmiFactory, wagmiInitHash, wagmiForkId} from "../../core/univ3forks/Wagmi.sol";
+import {swapXFactory, swapXForkId} from "../../core/univ3forks/SwapX.sol";
+import {algebraV4InitHash, IAlgebraCallback} from "../../core/univ3forks/Algebra.sol";
 
 // Solidity inheritance is stupid
 import {SettlerAbstract} from "../../SettlerAbstract.sol";
@@ -70,6 +72,10 @@ abstract contract SonicMixin is FreeMemory, SettlerBase {
             factory = wagmiFactory;
             initHash = wagmiInitHash;
             callbackSelector = uint32(IUniswapV3Callback.uniswapV3SwapCallback.selector);
+        } else if (forkId == swapXForkId) {
+            factory = swapXFactory;
+            initHash = algebraV4InitHash;
+            callbackSelector = uint32(IAlgebraCallback.algebraSwapCallback.selector);
         } else {
             revert UnknownForkId(forkId);
         }
diff --git a/src/chains/Taiko/Common.sol b/src/chains/Taiko/Common.sol
index a8cb30f4..2cfb2114 100644
--- a/src/chains/Taiko/Common.sol
+++ b/src/chains/Taiko/Common.sol
@@ -16,8 +16,8 @@ import {
     uniswapV3ForkId,
     IUniswapV3Callback
 } from "../../core/univ3forks/UniswapV3.sol";
-import {swapsicleFactory, swapsicleInitHash, swapsicleForkId} from "../../core/univ3forks/Swapsicle.sol";
-import {IAlgebraCallback} from "../../core/univ3forks/Algebra.sol";
+import {swapsicleFactory, swapsicleForkId} from "../../core/univ3forks/Swapsicle.sol";
+import {algebraV4InitHash, IAlgebraCallback} from "../../core/univ3forks/Algebra.sol";
 import {pankoFactory, pankoInitHash, pankoForkId} from "../../core/univ3forks/Panko.sol";
 import {IPancakeSwapV3Callback} from "../../core/univ3forks/PancakeSwapV3.sol";
 
@@ -53,7 +53,7 @@ abstract contract TaikoMixin is FreeMemory, SettlerBase {
             callbackSelector = uint32(IUniswapV3Callback.uniswapV3SwapCallback.selector);
         } else if (forkId == swapsicleForkId) {
             factory = swapsicleFactory;
-            initHash = swapsicleInitHash;
+            initHash = algebraV4InitHash;
             callbackSelector = uint32(IAlgebraCallback.algebraSwapCallback.selector);
         } else if (forkId == pankoForkId) {
             factory = pankoFactory;
diff --git a/src/core/univ3forks/Algebra.sol b/src/core/univ3forks/Algebra.sol
index f2522aa3..35bfb39c 100644
--- a/src/core/univ3forks/Algebra.sol
+++ b/src/core/univ3forks/Algebra.sol
@@ -1,6 +1,8 @@
 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.25;
 
+bytes32 constant algebraV4InitHash = 0xf96d2474815c32e070cd63233f06af5413efc5dcb430aee4ff18cc29007c562d;
+
 interface IAlgebraCallback {
     function algebraSwapCallback(int256 amount0Delta, int256 amount1Delta, bytes calldata data) external;
 }
diff --git a/src/core/univ3forks/Kim.sol b/src/core/univ3forks/Kim.sol
index 037293bc..adbdbb56 100644
--- a/src/core/univ3forks/Kim.sol
+++ b/src/core/univ3forks/Kim.sol
@@ -2,5 +2,4 @@
 pragma solidity ^0.8.25;
 
 address constant kimFactory = 0x6414A461B19726410E52488d9D5ff33682701635;
-bytes32 constant kimInitHash = 0xf96d2474815c32e070cd63233f06af5413efc5dcb430aee4ff18cc29007c562d;
 uint8 constant kimForkId = 22;
diff --git a/src/core/univ3forks/Swapsicle.sol b/src/core/univ3forks/Swapsicle.sol
index ce9d5bc0..fd462b49 100644
--- a/src/core/univ3forks/Swapsicle.sol
+++ b/src/core/univ3forks/Swapsicle.sol
@@ -2,5 +2,4 @@
 pragma solidity ^0.8.25;
 
 address constant swapsicleFactory = 0xb68b27a1c93A52d698EecA5a759E2E4469432C09;
-bytes32 constant swapsicleInitHash = 0xf96d2474815c32e070cd63233f06af5413efc5dcb430aee4ff18cc29007c562d;
 uint8 constant swapsicleForkId = 24;