diff --git a/src/openapi/utxo-bitcoincash/utxo-bitcoincash.yaml b/src/openapi/utxo-bitcoincash/utxo-bitcoincash.yaml
index e12c7e9a1..d27a110aa 100644
--- a/src/openapi/utxo-bitcoincash/utxo-bitcoincash.yaml
+++ b/src/openapi/utxo-bitcoincash/utxo-bitcoincash.yaml
@@ -455,7 +455,7 @@ paths:
         "400":
           $ref: "#/components/responses/BadRequest"
 
-  "/{apiKey}/api/v2/tickers-list":
+  "/{apiKey}/api/v2/tickers-list/":
     get:
       operationId: getTickersList
       summary: Get Tickers List
@@ -472,11 +472,17 @@ paths:
         - $ref: "#/components/parameters/apiKey"
         - in: query
           name: timestamp
-          required: false
-          description: Unix timestamp to query availability for. Defaults to the latest available.
+          required: true
+          description: Unix timestamp for the requested currency list.
           schema:
             type: integer
             example: 1578391200
+        - in: query
+          name: token
+          required: false
+          description: Token symbol or contract/address key for token-specific rates.
+          schema:
+            type: string
       responses:
         "200":
           description: Available tickers.
@@ -490,7 +496,7 @@ paths:
         "400":
           $ref: "#/components/responses/BadRequest"
 
-  "/{apiKey}/api/v2/tickers":
+  "/{apiKey}/api/v2/tickers/":
     get:
       operationId: getTickers
       summary: Get Tickers
@@ -520,6 +526,18 @@ paths:
           schema:
             type: integer
             example: 1578391200
+        - in: query
+          name: block
+          required: false
+          description: Block height or hash whose timestamp should be used for historical rates.
+          schema:
+            type: string
+        - in: query
+          name: token
+          required: false
+          description: Token symbol or contract/address key for token-specific rates.
+          schema:
+            type: string
       responses:
         "200":
           description: Currency rate response.
@@ -643,8 +661,7 @@ components:
           schema:
             $ref: "#/components/schemas/Error"
           example:
-            error:
-              message: "invalid request"
+            error: "invalid request"
     NotFound:
       description: Resource not found on the requested network.
       content:
@@ -652,17 +669,15 @@ components:
           schema:
             $ref: "#/components/schemas/Error"
           example:
-            error:
-              message: "not found"
+            error: "not found"
   schemas:
     Error:
       type: object
+      required: [error]
       properties:
         error:
-          type: object
-          properties:
-            message:
-              type: string
+          type: string
+          description: Human-readable error message.
     BlockIndexResponse:
       type: object
       required: [blockHash]
diff --git a/src/openapi/utxo-dogecoin/utxo-dogecoin.yaml b/src/openapi/utxo-dogecoin/utxo-dogecoin.yaml
index 515af0992..be9cafeb1 100644
--- a/src/openapi/utxo-dogecoin/utxo-dogecoin.yaml
+++ b/src/openapi/utxo-dogecoin/utxo-dogecoin.yaml
@@ -452,7 +452,7 @@ paths:
         "400":
           $ref: "#/components/responses/BadRequest"
 
-  "/{apiKey}/api/v2/tickers-list":
+  "/{apiKey}/api/v2/tickers-list/":
     get:
       operationId: getTickersList
       summary: Get Tickers List
@@ -469,11 +469,17 @@ paths:
         - $ref: "#/components/parameters/apiKey"
         - in: query
           name: timestamp
-          required: false
-          description: Unix timestamp to query availability for. Defaults to the latest available.
+          required: true
+          description: Unix timestamp for the requested currency list.
           schema:
             type: integer
             example: 1578391200
+        - in: query
+          name: token
+          required: false
+          description: Token symbol or contract/address key for token-specific rates.
+          schema:
+            type: string
       responses:
         "200":
           description: Available tickers.
@@ -487,7 +493,7 @@ paths:
         "400":
           $ref: "#/components/responses/BadRequest"
 
-  "/{apiKey}/api/v2/tickers":
+  "/{apiKey}/api/v2/tickers/":
     get:
       operationId: getTickers
       summary: Get Tickers
@@ -517,6 +523,18 @@ paths:
           schema:
             type: integer
             example: 1578391200
+        - in: query
+          name: block
+          required: false
+          description: Block height or hash whose timestamp should be used for historical rates.
+          schema:
+            type: string
+        - in: query
+          name: token
+          required: false
+          description: Token symbol or contract/address key for token-specific rates.
+          schema:
+            type: string
       responses:
         "200":
           description: Currency rate response.
@@ -640,8 +658,7 @@ components:
           schema:
             $ref: "#/components/schemas/Error"
           example:
-            error:
-              message: "invalid request"
+            error: "invalid request"
     NotFound:
       description: Resource not found on the requested network.
       content:
@@ -649,17 +666,15 @@ components:
           schema:
             $ref: "#/components/schemas/Error"
           example:
-            error:
-              message: "not found"
+            error: "not found"
   schemas:
     Error:
       type: object
+      required: [error]
       properties:
         error:
-          type: object
-          properties:
-            message:
-              type: string
+          type: string
+          description: Human-readable error message.
     BlockIndexResponse:
       type: object
       required: [blockHash]
diff --git a/src/openapi/utxo-litecoin/utxo-litecoin.yaml b/src/openapi/utxo-litecoin/utxo-litecoin.yaml
index cd1f6f380..759848426 100644
--- a/src/openapi/utxo-litecoin/utxo-litecoin.yaml
+++ b/src/openapi/utxo-litecoin/utxo-litecoin.yaml
@@ -460,7 +460,7 @@ paths:
         "400":
           $ref: "#/components/responses/BadRequest"
 
-  "/{apiKey}/api/v2/tickers-list":
+  "/{apiKey}/api/v2/tickers-list/":
     get:
       operationId: getTickersList
       summary: Get Tickers List
@@ -477,11 +477,17 @@ paths:
         - $ref: "#/components/parameters/apiKey"
         - in: query
           name: timestamp
-          required: false
-          description: Unix timestamp to query availability for. Defaults to the latest available.
+          required: true
+          description: Unix timestamp for the requested currency list.
           schema:
             type: integer
             example: 1578391200
+        - in: query
+          name: token
+          required: false
+          description: Token symbol or contract/address key for token-specific rates.
+          schema:
+            type: string
       responses:
         "200":
           description: Available tickers.
@@ -495,7 +501,7 @@ paths:
         "400":
           $ref: "#/components/responses/BadRequest"
 
-  "/{apiKey}/api/v2/tickers":
+  "/{apiKey}/api/v2/tickers/":
     get:
       operationId: getTickers
       summary: Get Tickers
@@ -525,6 +531,18 @@ paths:
           schema:
             type: integer
             example: 1578391200
+        - in: query
+          name: block
+          required: false
+          description: Block height or hash whose timestamp should be used for historical rates.
+          schema:
+            type: string
+        - in: query
+          name: token
+          required: false
+          description: Token symbol or contract/address key for token-specific rates.
+          schema:
+            type: string
       responses:
         "200":
           description: Currency rate response.
@@ -648,8 +666,7 @@ components:
           schema:
             $ref: "#/components/schemas/Error"
           example:
-            error:
-              message: "invalid request"
+            error: "invalid request"
     NotFound:
       description: Resource not found on the requested network.
       content:
@@ -657,17 +674,15 @@ components:
           schema:
             $ref: "#/components/schemas/Error"
           example:
-            error:
-              message: "not found"
+            error: "not found"
   schemas:
     Error:
       type: object
+      required: [error]
       properties:
         error:
-          type: object
-          properties:
-            message:
-              type: string
+          type: string
+          description: Human-readable error message.
     BlockIndexResponse:
       type: object
       required: [blockHash]
diff --git a/src/openapi/utxo/utxo.yaml b/src/openapi/utxo/utxo.yaml
index c6b154615..843d5f7af 100644
--- a/src/openapi/utxo/utxo.yaml
+++ b/src/openapi/utxo/utxo.yaml
@@ -444,7 +444,7 @@ paths:
         "400":
           $ref: "#/components/responses/BadRequest"
 
-  "/{apiKey}/api/v2/tickers-list":
+  "/{apiKey}/api/v2/tickers-list/":
     get:
       operationId: getTickersList
       summary: Get Tickers List
@@ -461,11 +461,17 @@ paths:
         - $ref: "#/components/parameters/apiKey"
         - in: query
           name: timestamp
-          required: false
-          description: Unix timestamp to query availability for. Defaults to the latest available.
+          required: true
+          description: Unix timestamp for the requested currency list.
           schema:
             type: integer
             example: 1574346615
+        - in: query
+          name: token
+          required: false
+          description: Token symbol or contract/address key for token-specific rates.
+          schema:
+            type: string
       responses:
         "200":
           description: Available tickers.
@@ -479,7 +485,7 @@ paths:
         "400":
           $ref: "#/components/responses/BadRequest"
 
-  "/{apiKey}/api/v2/tickers":
+  "/{apiKey}/api/v2/tickers/":
     get:
       operationId: getTickers
       summary: Get Tickers
@@ -509,6 +515,18 @@ paths:
           schema:
             type: integer
             example: 1574346615
+        - in: query
+          name: block
+          required: false
+          description: Block height or hash whose timestamp should be used for historical rates.
+          schema:
+            type: string
+        - in: query
+          name: token
+          required: false
+          description: Token symbol or contract/address key for token-specific rates.
+          schema:
+            type: string
       responses:
         "200":
           description: Currency rate response.
@@ -632,8 +650,7 @@ components:
           schema:
             $ref: "#/components/schemas/Error"
           example:
-            error:
-              message: "invalid request"
+            error: "invalid request"
     NotFound:
       description: Resource not found on the requested network.
       content:
@@ -641,17 +658,15 @@ components:
           schema:
             $ref: "#/components/schemas/Error"
           example:
-            error:
-              message: "not found"
+            error: "not found"
   schemas:
     Error:
       type: object
+      required: [error]
       properties:
         error:
-          type: object
-          properties:
-            message:
-              type: string
+          type: string
+          description: Human-readable error message.
     BlockIndexResponse:
       type: object
       required: [blockHash]