diff --git a/packages/mcp/README.md b/packages/mcp/README.md
index 933c253..db46fc0 100644
--- a/packages/mcp/README.md
+++ b/packages/mcp/README.md
@@ -93,6 +93,8 @@ npm install
 STELLAR_SECRET_KEY=S... AGENT_API_URL=http://localhost:3002 npx tsx src/index.ts
 ```
 
+`viem` is a required (non-optional) peer dependency of `mppx`, which this package depends on - it's listed here as a direct dependency so a plain `npm install` resolves it without an extra manual `npm i viem` step.
+
 ## License
 
 Apache-2.0 - see [LICENSE](https://github.com/nirium-protocol/nirium/blob/main/packages/mcp/LICENSE).
diff --git a/packages/mcp/package-lock.json b/packages/mcp/package-lock.json
index 2198c21..5fc2251 100644
--- a/packages/mcp/package-lock.json
+++ b/packages/mcp/package-lock.json
@@ -16,6 +16,7 @@
         "@x402/fetch": "^2.28.0",
         "@x402/stellar": "^2.28.0",
         "mppx": "^0.6.31",
+        "viem": "^2.57.16",
         "zod": "^3.25.0"
       },
       "bin": {
@@ -1801,7 +1802,6 @@
         }
       ],
       "license": "MIT",
-      "peer": true,
       "peerDependencies": {
         "ws": "*"
       }
@@ -2426,7 +2426,7 @@
       "version": "5.9.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
       "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
-      "devOptional": true,
+      "dev": true,
       "license": "Apache-2.0",
       "bin": {
         "tsc": "bin/tsc",
@@ -2474,9 +2474,9 @@
       }
     },
     "node_modules/viem": {
-      "version": "2.57.10",
-      "resolved": "https://registry.npmjs.org/viem/-/viem-2.57.10.tgz",
-      "integrity": "sha512-gQ6aELkfwvJDeWObxdOwWIQw8coUJhKhXDbyXCMOzzopU1F8s5Xs4l1HWQ4uaXa/uJ1/3uz8DiBU+RozllxPhw==",
+      "version": "2.57.16",
+      "resolved": "https://registry.npmjs.org/viem/-/viem-2.57.16.tgz",
+      "integrity": "sha512-+4uaUw3NfkqjaqsZp8Zci94K33oc9rv7mIUgvPduJxsY/tI0ASi2YkaXoUVSBGfdIw/QPWuVnIf9LTFf35IoMg==",
       "funding": [
         {
           "type": "github",
@@ -2484,7 +2484,6 @@
         }
       ],
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@noble/curves": "1.9.1",
         "@noble/hashes": "1.8.0",
@@ -2492,13 +2491,17 @@
         "@scure/bip39": "1.6.0",
         "abitype": "1.2.3",
         "isows": "1.0.7",
-        "ox": "0.14.57",
+        "ox": "0.14.59",
         "ws": "8.21.0"
       },
       "peerDependencies": {
+        "mppx": ">=0.17.0",
         "typescript": ">=5.0.4"
       },
       "peerDependenciesMeta": {
+        "mppx": {
+          "optional": true
+        },
         "typescript": {
           "optional": true
         }
@@ -2509,7 +2512,6 @@
       "resolved": "https://registry.npmjs.org/@noble/hashes/-/hashes-1.8.0.tgz",
       "integrity": "sha512-jCs9ldd7NwzpgXDIf6P3+NrHh9/sD6CQdxHyjQI+h/6rDNo88ypBxxz45UDuZHz9r3tNz7N/VInSVoVdtXEI4A==",
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": "^14.21.3 || >=16"
       },
@@ -2522,7 +2524,6 @@
       "resolved": "https://registry.npmjs.org/abitype/-/abitype-1.2.3.tgz",
       "integrity": "sha512-Ofer5QUnuUdTFsBRwARMoWKOH1ND5ehwYhJ3OJ/BQO+StkwQjHw0XyVh4vDttzHB7QOFhPHa/o413PJ82gU/Tg==",
       "license": "MIT",
-      "peer": true,
       "funding": {
         "url": "https://github.com/sponsors/wevm"
       },
@@ -2540,9 +2541,9 @@
       }
     },
     "node_modules/viem/node_modules/ox": {
-      "version": "0.14.57",
-      "resolved": "https://registry.npmjs.org/ox/-/ox-0.14.57.tgz",
-      "integrity": "sha512-CPF6aEFyAuqgL0x7VaFM0vI2/CUd5Qk8+BIL6OnViPw+gF07O/VAhqEPOPw5GYnYPwomIk8mD91gTcQ1RAtupA==",
+      "version": "0.14.59",
+      "resolved": "https://registry.npmjs.org/ox/-/ox-0.14.59.tgz",
+      "integrity": "sha512-Y+DPEQScTEGKteQATjtytE1JRQ5cg1R2+DvYQ/lbhUCm/xS9n0Jnkkf2AqQyIntefQxs8xY6dZ+kyNZ7zf2FzA==",
       "funding": [
         {
           "type": "github",
@@ -2550,7 +2551,6 @@
         }
       ],
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@adraffy/ens-normalize": "^1.11.0",
         "@noble/ciphers": "^1.3.0",
@@ -2596,7 +2596,6 @@
       "resolved": "https://registry.npmjs.org/ws/-/ws-8.21.0.tgz",
       "integrity": "sha512-Vsp28b7DRcimFQvrqu2Wek3z1iYxDCWqHYB8Qsnk/S4RfaCQzPGPyBNuVjJV3cd6UiKtUtp6sNM77gWvzcCH+g==",
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">=10.0.0"
       },
diff --git a/packages/mcp/package.json b/packages/mcp/package.json
index 08dd5a2..f90e8e2 100644
--- a/packages/mcp/package.json
+++ b/packages/mcp/package.json
@@ -39,6 +39,7 @@
     "@x402/fetch": "^2.28.0",
     "@x402/stellar": "^2.28.0",
     "mppx": "^0.6.31",
+    "viem": "^2.57.16",
     "zod": "^3.25.0"
   },
   "devDependencies": {