diff --git a/.changeset/wave-c-polygon-hyperliquid-wrapped.md b/.changeset/wave-c-polygon-hyperliquid-wrapped.md
new file mode 100644
index 0000000..c846167
--- /dev/null
+++ b/.changeset/wave-c-polygon-hyperliquid-wrapped.md
@@ -0,0 +1,5 @@
+---
+"@avaprotocol/protocols": minor
+---
+
+Add Polygon PoS (137) and Hyperliquid EVM (999) to `Chains`, and map `wrapped.weth` to the canonical native wrappers: WPOL `0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270` (legacy WMATIC) and WHYPE `0x5555555555555555555555555555555555555555`. No Uniswap/AAVE on HyperEVM in this change; Polygon protocol maps are a follow-up.
diff --git a/README.md b/README.md
index 37459de..a303f10 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ const sig  = Protocols.aaveV3.eventTopics.Borrow;
 | **Spark** | SparkLend Pool (AAVE V3 fork — reuse AAVE Pool ABI) | Mainnet |
 | **Superfluid** | CFAv1Forwarder + setFlowrate/createFlow ABI | Mainnet, Base, **BNB** |
 | **Uniswap V3** | SwapRouter02, QuoterV2, Permit2, Factory, NFT Position Manager, Universal Router + ABIs | Mainnet, Sepolia, **Optimism**, Base, Base Sepolia, **BNB**, **Arbitrum**, **Unichain**, **Robinhood** |
-| **Wrapped Ether** | Canonical wrapper of native gas + WETH9 ABI (WBNB on BNB) | Mainnet, Sepolia, **Optimism**, Base, Base Sepolia, **BNB**, **Arbitrum**, **Unichain**, **Robinhood** |
+| **Wrapped Ether** | Canonical wrapper of native gas + WETH9 ABI (WBNB on BNB, WPOL on Polygon, WHYPE on Hyperliquid EVM) | Mainnet, Sepolia, **Optimism**, Base, Base Sepolia, **BNB**, **Arbitrum**, **Unichain**, **Robinhood**, **Polygon**, **Hyperliquid** |
 | **ERC-20** | Standard `approve` ABI fragment | n/a |
 
 Shared ABIs (consumed by multiple protocol modules):
diff --git a/src/chains.ts b/src/chains.ts
index 476ffdd..71c4a22 100644
--- a/src/chains.ts
+++ b/src/chains.ts
@@ -17,6 +17,8 @@ export const Chains = Object.freeze({
   BnbMainnet: 56 as const,
   ArbitrumOne: 42_161 as const,
   RobinhoodMainnet: 4_663 as const,
+  PolygonMainnet: 137 as const,
+  HyperliquidMainnet: 999 as const,
 });
 
 export type ChainId = (typeof Chains)[keyof typeof Chains] | number;
diff --git a/src/protocols/wrapped.ts b/src/protocols/wrapped.ts
index 12dcb46..4748c56 100644
--- a/src/protocols/wrapped.ts
+++ b/src/protocols/wrapped.ts
@@ -3,7 +3,8 @@
 // Sepolia) this is the WETH9 (or OP-stack predeploy at 0x4200…0006)
 // contract. On chains with a different native gas token, the field
 // maps to the equivalent canonical wrapper — e.g. **WBNB** on BNB
-// Chain. The field name stays `weth` so chain-agnostic consumers can
+// Chain, **WPOL** on Polygon, **WHYPE** on Hyperliquid EVM. The field
+// name stays `weth` so chain-agnostic consumers can
 // write `Protocols.wrapped.weth[chainId]` without branching by chain.
 //
 // The bridged-from-Ethereum WETH on BNB
@@ -27,6 +28,12 @@ const weth: AddressByChain = {
   [Chains.UnichainMainnet]: "0x4200000000000000000000000000000000000006",
   // https://docs.robinhood.com/chain/contracts/
   [Chains.RobinhoodMainnet]: "0x0Bd7D308f8E1639FAb988df18A8011f41EAcAD73",
+  // Polygon PoS native is POL. Canonical wrapper is the former WMATIC
+  // contract, now WPOL: https://polygonscan.com/token/0x0d500b1d8e8ef31e21c99d1db9a6444d3adf1270
+  [Chains.PolygonMainnet]: "0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270",
+  // HyperEVM native is HYPE. Canonical WHYPE system contract:
+  // https://www.hyperscan.com/token/0x5555555555555555555555555555555555555555
+  [Chains.HyperliquidMainnet]: "0x5555555555555555555555555555555555555555",
 };
 
 /**
diff --git a/tests/catalog.test.ts b/tests/catalog.test.ts
index db18087..217d1bf 100644
--- a/tests/catalog.test.ts
+++ b/tests/catalog.test.ts
@@ -342,6 +342,14 @@ describe("Uniswap V3 catalog", () => {
     expect(Protocols.wrapped.weth[Chains.RobinhoodMainnet]).toBe(
       "0x0Bd7D308f8E1639FAb988df18A8011f41EAcAD73",
     );
+    // Polygon WPOL (legacy WMATIC) / HyperEVM WHYPE — native wrappers,
+    // not bridged ETH. Field name stays `weth` for chain-agnostic callers.
+    expect(Protocols.wrapped.weth[Chains.PolygonMainnet]).toBe(
+      "0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270",
+    );
+    expect(Protocols.wrapped.weth[Chains.HyperliquidMainnet]).toBe(
+      "0x5555555555555555555555555555555555555555",
+    );
   });
 
   it("ships exactInputSingle in the SwapRouter02 ABI", () => {