diff --git a/ecosystem/rpc/toncenter/v3.yaml b/ecosystem/rpc/toncenter/v3.yaml
index 773fe268..013aae19 100644
--- a/ecosystem/rpc/toncenter/v3.yaml
+++ b/ecosystem/rpc/toncenter/v3.yaml
@@ -447,6 +447,72 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/RequestError'
+  /api/v3/decode:
+    get:
+      tags:
+      - Utils
+      summary: Decode opcodes and bodies
+      description: Decode opcodes (hex or decimal) and message bodies (base64 or hex).
+      parameters:
+        - in: query
+          name: opcodes
+          description: List of opcodes to decode (hex or decimal).
+          required: false
+          schema:
+            type: array
+            items:
+              type: string
+          style: form
+          explode: true
+        - in: query
+          name: bodies
+          description: List of message bodies to decode (base64 or hex).
+          required: false
+          schema:
+            type: array
+            items:
+              type: string
+          style: form
+          explode: true
+      responses:
+        '200':
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/DecodeResponse'
+        '400':
+          description: Bad Request
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/RequestError'
+    post:
+      tags:
+      - Utils
+      summary: Decode opcodes and bodies
+      description: >
+        Decode opcodes (hex or decimal) and message bodies (base64 or hex).
+        Use POST for long parameter lists that could be truncated in GET.
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/DecodeRequest'
+      responses:
+        '200':
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/DecodeResponse'
+        '400':
+          description: Bad Request
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/RequestError'
   /api/v3/estimateFee:
     post:
       description: Estimate fees required for query processing. Fields body, init-code
@@ -2288,11 +2354,53 @@ components:
             $ref: '#/components/schemas/DNSRecord'
     DecodedContent:
       type: object
+      nullable: true
+      additionalProperties: true
       properties:
-        comment:
-          type: string
         type:
           type: string
+        comment:
+          type: string
+        data:
+          type: object
+          additionalProperties: true
+    DecodeRequest:
+      type: object
+      properties:
+        opcodes:
+          type: array
+          items:
+            type: string
+          description: Opcodes in hex (with or without 0x) or decimal format.
+        bodies:
+          type: array
+          items:
+            type: string
+          description: Message bodies in base64 or hex format.
+    DecodeResponse:
+      type: object
+      properties:
+        opcodes:
+          type: array
+          items:
+            type: string
+          description: Decoded opcode names or identifiers.
+        bodies:
+          type: array
+          items:
+            type: object
+            additionalProperties: true
+          description: Decoded message bodies as structured objects (scheme-dependent).
+      example:
+        opcodes:
+          - "jetton_transfer"
+        bodies:
+          - type: "jetton_transfer"
+            data:
+              amount: "1000000000"
+              destination: "0:abcd..."
+              response_destination: null
+              custom_payload: null
     JettonBurn:
       type: object
       properties:
@@ -2321,6 +2429,8 @@ components:
           example: '0'
         transaction_now:
           type: integer
+        decoded_custom_payload:
+          $ref: '#/components/schemas/DecodedContent'
     JettonBurnsResponse:
       type: object
       properties:
@@ -2400,6 +2510,10 @@ components:
           example: '0'
         transaction_now:
           type: integer
+        decoded_custom_payload:
+          $ref: '#/components/schemas/DecodedContent'
+        decoded_forward_payload:
+          $ref: '#/components/schemas/DecodedContent'
     JettonTransfersResponse:
       type: object
       properties:
@@ -2650,6 +2764,8 @@ components:
           example: '0'
         transaction_now:
           type: integer
+        decoded_forward_payload:
+          $ref: '#/components/schemas/DecodedContent'
     NFTTransfersResponse:
       type: object
       properties: