diff --git a/openapi/Swarm.yaml b/openapi/Swarm.yaml
index 61b446d1095..ec8050228d1 100644
--- a/openapi/Swarm.yaml
+++ b/openapi/Swarm.yaml
@@ -1913,6 +1913,44 @@ paths:
         default:
           description: Default response
 
+  "/rchash/{depth}/{anchor1}/{anchor2}":
+    get:
+      summary: Get reserve commitment hash with sample proofs
+      tags:
+        - RChash
+      parameters:
+        - in: path
+          name: depth
+          schema:
+            type: integer
+            minimum: 0
+            default: 0
+          required: true
+          description: The storage depth.
+        - in: path
+          name: anchor1
+          schema:
+            $ref: "#/components/schemas/HexString"
+          required: true
+          description: The first anchor.
+        - in: path
+          name: anchor2
+          schema:
+            $ref: "#/components/schemas/HexString"
+          required: true
+          description: The second anchor.
+      responses:
+        "200":
+          description: Reserve sample response
+          content:
+            application/json:
+              schema:
+                $ref: "SwarmCommon.yaml#/components/schemas/ApiRCHashResponse"
+        "500":
+          $ref: "SwarmCommon.yaml#/components/responses/500"
+        default:
+          description: Default response
+
 components:
   securitySchemes:
     basicAuth:
diff --git a/openapi/SwarmCommon.yaml b/openapi/SwarmCommon.yaml
index 82066bf23dc..eccb03e9946 100644
--- a/openapi/SwarmCommon.yaml
+++ b/openapi/SwarmCommon.yaml
@@ -866,6 +866,83 @@ components:
           items:
             $ref: "#/components/schemas/StatusSnapshotResponse"
 
+    ApiChunkInclusionProof:
+      type: object
+      properties:
+        chunkSpan:
+          minimum: 0
+          type: integer
+        postageProof:
+          $ref: '#/components/schemas/ApiPostageProof'
+        proofSegments:
+          items:
+            type: string
+          nullable: true
+          type: array
+        proofSegments2:
+          items:
+            type: string
+          nullable: true
+          type: array
+        proofSegments3:
+          items:
+            type: string
+          nullable: true
+          type: array
+        proveSegment:
+          type: string
+        proveSegment2:
+          type: string
+        socProof:
+          items:
+            $ref: '#/components/schemas/ApiSOCProof'
+          nullable: true
+          type: array
+
+    ApiChunkInclusionProofs:
+      type: object
+      properties:
+        proof1:
+          $ref: '#/components/schemas/ApiChunkInclusionProof'
+        proof2:
+          $ref: '#/components/schemas/ApiChunkInclusionProof'
+        proofLast:
+          $ref: '#/components/schemas/ApiChunkInclusionProof'
+
+    ApiPostageProof:
+      type: object
+      properties:
+        index:
+          type: string
+        postageId:
+          type: string
+        signature:
+          type: string
+        timeStamp:
+          type: string
+
+    ApiRCHashResponse:
+      type: object
+      properties:
+        duration:
+          type: integer
+        hash:
+          $ref: '#/components/schemas/SwarmAddress'
+        proofs:
+          $ref: '#/components/schemas/ApiChunkInclusionProofs'
+
+    ApiSOCProof:
+      type: object
+      properties:
+        chunkAddr:
+          type: string
+        identifier:
+          type: string
+        signature:
+          type: string
+        signer:
+          type: string
+
   headers:
     SwarmTag:
       description: "Tag UID"