diff --git a/go/.changes/unreleased/adi-chain.yaml b/go/.changes/unreleased/adi-chain.yaml
new file mode 100644
index 0000000000..77d1c67b64
--- /dev/null
+++ b/go/.changes/unreleased/adi-chain.yaml
@@ -0,0 +1,2 @@
+kind: added
+body: Add ADI Chain (chain ID 36900) support with USDC.e as the default stablecoin
diff --git a/go/mechanisms/evm/constants.go b/go/mechanisms/evm/constants.go
index 0c90de65df..876f0fa74f 100644
--- a/go/mechanisms/evm/constants.go
+++ b/go/mechanisms/evm/constants.go
@@ -82,6 +82,7 @@ var (
 	ChainIDArbSepolia    = big.NewInt(421614)
 	ChainIDRadius        = big.NewInt(723487)
 	ChainIDRadiusTestnet = big.NewInt(72344)
+	ChainIDADI           = big.NewInt(36900)
 	ChainIDHPP           = big.NewInt(190415)
 	ChainIDHPPSepolia    = big.NewInt(181228)
 
@@ -225,6 +226,16 @@ var (
 				SupportsEip2612:     true,
 			},
 		},
+		// ADI Chain
+		"eip155:36900": {
+			ChainID: ChainIDADI,
+			DefaultAsset: AssetInfo{
+				Address:  "0x9cb8142aEBBcdc60AF7c97Af897A67A8f3CA71C2", // USDC.e on ADI Chain
+				Name:     "USDC.e",
+				Version:  "2",
+				Decimals: DefaultDecimals,
+			},
+		},
 		// HPP Mainnet
 		"eip155:190415": {
 			ChainID: ChainIDHPP,
diff --git a/python/x402/changelog.d/adi-chain.feature.md b/python/x402/changelog.d/adi-chain.feature.md
new file mode 100644
index 0000000000..d05574f72f
--- /dev/null
+++ b/python/x402/changelog.d/adi-chain.feature.md
@@ -0,0 +1 @@
+Add ADI Chain (chain ID 36900) support with USDC.e as the default stablecoin
diff --git a/python/x402/mechanisms/evm/constants.py b/python/x402/mechanisms/evm/constants.py
index e3afb21acc..bd958a38b0 100644
--- a/python/x402/mechanisms/evm/constants.py
+++ b/python/x402/mechanisms/evm/constants.py
@@ -534,6 +534,16 @@ class NetworkConfig(_NetworkConfigRequired, total=False):
             "supports_eip2612": True,
         },
     },
+    # ADI Chain
+    "eip155:36900": {
+        "chain_id": 36900,
+        "default_asset": {
+            "address": "0x9cb8142aEBBcdc60AF7c97Af897A67A8f3CA71C2",
+            "name": "USDC.e",
+            "version": "2",
+            "decimals": 6,
+        },
+    },
     # HPP Mainnet
     "eip155:190415": {
         "chain_id": 190415,
diff --git a/typescript/.changeset/adi-chain.md b/typescript/.changeset/adi-chain.md
new file mode 100644
index 0000000000..eda141e5bd
--- /dev/null
+++ b/typescript/.changeset/adi-chain.md
@@ -0,0 +1,5 @@
+---
+"@x402/evm": minor
+---
+
+Add ADI Chain (chain ID 36900) support with USDC.e as the default stablecoin
diff --git a/typescript/packages/mechanisms/evm/src/shared/defaultAssets.ts b/typescript/packages/mechanisms/evm/src/shared/defaultAssets.ts
index dab97b33f4..834a2d98f0 100644
--- a/typescript/packages/mechanisms/evm/src/shared/defaultAssets.ts
+++ b/typescript/packages/mechanisms/evm/src/shared/defaultAssets.ts
@@ -121,6 +121,12 @@ export const DEFAULT_STABLECOINS: Record<string, ExactDefaultAssetInfo> = {
     assetTransferMethod: "permit2",
     supportsEip2612: true,
   }, // Radius Testnet SBC (no EIP-3009, supports EIP-2612)
+  "eip155:36900": {
+    address: "0x9cb8142aEBBcdc60AF7c97Af897A67A8f3CA71C2",
+    name: "USDC.e",
+    version: "2",
+    decimals: 6,
+  }, // ADI Chain USDC.e (EIP-3009 supported)
   "eip155:190415": {
     address: "0x401eCb1D350407f13ba348573E5630B83638E30D",
     name: "Bridged USDC",