diff --git a/index.ts b/index.ts
index 347d3d6..41ad188 100644
--- a/index.ts
+++ b/index.ts
@@ -1,5 +1,5 @@
 import { Hono, type Context } from "hono";
-import { type RootResolver, graphqlServer, getGraphQLParams } from '@hono/graphql-server';
+import { type RootResolver, graphqlServer } from '@hono/graphql-server';
 import { buildSchema } from 'graphql';
 import { SafeParseSuccess, z } from 'zod';
 
@@ -86,7 +86,17 @@ async function AntelopeTokenAPI() {
         async (ctx: Context) => {
             // Use `unknown` for undefined schemas definitions in `zod.gen.ts`
             const path_params_schema = paths[endpoint]["get"]["parameters"]["path"] ?? z.unknown();
-            const query_params_schema = paths[endpoint]["get"]["parameters"]["query"] ?? z.unknown();
+            const query_params_schema = z.preprocess(
+                (q: any) => {
+                    // Preprocess block ranges to array so Zod can parse it
+                    if (q.block_range)
+                        q.block_range = q.block_range.split(',');
+
+                    return q;
+                },
+                paths[endpoint]["get"]["parameters"]["query"] ?? z.unknown()
+            );
+
             const path_params = path_params_schema.safeParse(ctx.req.param());
             const query_params = query_params_schema.safeParse(ctx.req.query());
             
diff --git a/package.json b/package.json
index d456019..d5891c9 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "antelope-token-api",
   "description": "Token balances, supply and transfers from the Antelope blockchains",
-  "version": "6.0.0",
+  "version": "6.0.1",
   "homepage": "https://github.com/pinax-network/antelope-token-api",
   "license": "MIT",
   "authors": [
diff --git a/src/types/zod.gen.ts b/src/types/zod.gen.ts
index d2e05a7..a44a4af 100644
--- a/src/types/zod.gen.ts
+++ b/src/types/zod.gen.ts
@@ -5,14 +5,18 @@ export const apiErrorSchema = z.object({ "status": z.union([z.literal(500), z.li
 export type ApiErrorSchema = z.infer<typeof apiErrorSchema>;
 
 
-export const balanceSchema = z.object({ "last_updated_block": z.coerce.number(), "contract": z.coerce.string(), "symcode": z.coerce.string(), "balance": z.coerce.number() });
+export const balanceSchema = z.object({ "last_updated_block": z.coerce.number().int(), "contract": z.coerce.string(), "symcode": z.coerce.string(), "balance": z.coerce.number() });
 export type BalanceSchema = z.infer<typeof balanceSchema>;
 
 
-export const balanceChangeSchema = z.object({ "trx_id": z.coerce.string(), "action_index": z.coerce.number(), "contract": z.coerce.string(), "symcode": z.coerce.string(), "precision": z.coerce.number(), "amount": z.coerce.number(), "value": z.coerce.number(), "block_num": z.coerce.number(), "timestamp": z.coerce.string(), "account": z.coerce.string(), "balance": z.coerce.string(), "balance_delta": z.coerce.number() });
+export const balanceChangeSchema = z.object({ "trx_id": z.coerce.string(), "action_index": z.coerce.number().int(), "contract": z.coerce.string(), "symcode": z.coerce.string(), "precision": z.coerce.number().int(), "amount": z.coerce.number().int(), "value": z.coerce.number(), "block_num": z.coerce.number().int(), "timestamp": z.coerce.string(), "account": z.coerce.string(), "balance": z.coerce.string(), "balance_delta": z.coerce.number().int() });
 export type BalanceChangeSchema = z.infer<typeof balanceChangeSchema>;
 
 
+export const blockRangeSchema = z.array(z.coerce.number().int()).max(2);
+export type BlockRangeSchema = z.infer<typeof blockRangeSchema>;
+
+
 export const holderSchema = z.object({ "account": z.coerce.string(), "balance": z.coerce.number() });
 export type HolderSchema = z.infer<typeof holderSchema>;
 
@@ -21,23 +25,23 @@ export const modelsScopeSchema = z.object({ "contract": z.coerce.string(), "symc
 export type ModelsScopeSchema = z.infer<typeof modelsScopeSchema>;
 
 
-export const paginationSchema = z.object({ "next_page": z.coerce.number(), "previous_page": z.coerce.number(), "total_pages": z.coerce.number(), "total_results": z.coerce.number() });
+export const paginationSchema = z.object({ "next_page": z.coerce.number().int(), "previous_page": z.coerce.number().int(), "total_pages": z.coerce.number().int(), "total_results": z.coerce.number().int() });
 export type PaginationSchema = z.infer<typeof paginationSchema>;
 
 
-export const queryStatisticsSchema = z.object({ "elapsed": z.coerce.number(), "rows_read": z.coerce.number(), "bytes_read": z.coerce.number() });
+export const queryStatisticsSchema = z.object({ "elapsed": z.coerce.number(), "rows_read": z.coerce.number().int(), "bytes_read": z.coerce.number().int() });
 export type QueryStatisticsSchema = z.infer<typeof queryStatisticsSchema>;
 
 
-export const responseMetadataSchema = z.object({ "statistics": z.lazy(() => queryStatisticsSchema).nullable(), "next_page": z.coerce.number(), "previous_page": z.coerce.number(), "total_pages": z.coerce.number(), "total_results": z.coerce.number() });
+export const responseMetadataSchema = z.object({ "statistics": z.lazy(() => queryStatisticsSchema).nullable(), "next_page": z.coerce.number().int(), "previous_page": z.coerce.number().int(), "total_pages": z.coerce.number().int(), "total_results": z.coerce.number().int() });
 export type ResponseMetadataSchema = z.infer<typeof responseMetadataSchema>;
 
 
-export const supplySchema = z.object({ "trx_id": z.coerce.string(), "action_index": z.coerce.number(), "contract": z.coerce.string(), "symcode": z.coerce.string(), "precision": z.coerce.number(), "amount": z.coerce.number(), "value": z.coerce.number(), "block_num": z.coerce.number(), "timestamp": z.coerce.string(), "issuer": z.coerce.string(), "max_supply": z.coerce.string(), "supply": z.coerce.string(), "supply_delta": z.coerce.number() });
+export const supplySchema = z.object({ "trx_id": z.coerce.string(), "action_index": z.coerce.number().int(), "contract": z.coerce.string(), "symcode": z.coerce.string(), "precision": z.coerce.number().int(), "amount": z.coerce.number().int(), "value": z.coerce.number(), "block_num": z.coerce.number().int(), "timestamp": z.coerce.string(), "issuer": z.coerce.string(), "max_supply": z.coerce.string(), "supply": z.coerce.string(), "supply_delta": z.coerce.number().int() });
 export type SupplySchema = z.infer<typeof supplySchema>;
 
 
-export const transferSchema = z.object({ "trx_id": z.coerce.string(), "action_index": z.coerce.number(), "contract": z.coerce.string(), "symcode": z.coerce.string(), "precision": z.coerce.number(), "amount": z.coerce.number(), "value": z.coerce.number(), "block_num": z.coerce.number(), "timestamp": z.coerce.string(), "from": z.coerce.string(), "to": z.coerce.string(), "quantity": z.coerce.string(), "memo": z.coerce.string() });
+export const transferSchema = z.object({ "trx_id": z.coerce.string(), "action_index": z.coerce.number().int(), "contract": z.coerce.string(), "symcode": z.coerce.string(), "precision": z.coerce.number().int(), "amount": z.coerce.number().int(), "value": z.coerce.number(), "block_num": z.coerce.number().int(), "timestamp": z.coerce.string(), "from": z.coerce.string(), "to": z.coerce.string(), "quantity": z.coerce.string(), "memo": z.coerce.string() });
 export type TransferSchema = z.infer<typeof transferSchema>;
 
 
@@ -45,7 +49,7 @@ export const versionSchema = z.object({ "version": z.coerce.string().regex(new R
 export type VersionSchema = z.infer<typeof versionSchema>;
 
 
-export const usageBalanceQueryParamsSchema = z.object({ "account": z.coerce.string(), "contract": z.coerce.string().optional(), "symcode": z.coerce.string().optional(), "limit": z.coerce.number().optional(), "page": z.coerce.number().optional() });
+export const usageBalanceQueryParamsSchema = z.object({ "account": z.coerce.string(), "contract": z.coerce.string().optional(), "symcode": z.coerce.string().optional(), "limit": z.coerce.number().int().default(10).optional(), "page": z.coerce.number().int().default(1).optional() });
 export type UsageBalanceQueryParamsSchema = z.infer<typeof usageBalanceQueryParamsSchema>;
 /**
  * @description Array of balances.
@@ -64,7 +68,7 @@ export const usageBalanceQueryResponseSchema = z.object({ "data": z.array(z.lazy
 export type UsageBalanceQueryResponseSchema = z.infer<typeof usageBalanceQueryResponseSchema>;
 
 
-export const usageBalanceHistoricalQueryParamsSchema = z.object({ "account": z.coerce.string(), "block_num": z.coerce.number(), "contract": z.coerce.string().optional(), "symcode": z.coerce.string().optional(), "limit": z.coerce.number().optional(), "page": z.coerce.number().optional() });
+export const usageBalanceHistoricalQueryParamsSchema = z.object({ "account": z.coerce.string(), "block_num": z.coerce.number().int(), "contract": z.coerce.string().optional(), "symcode": z.coerce.string().optional(), "limit": z.coerce.number().int().default(10).optional(), "page": z.coerce.number().int().default(1).optional() });
 export type UsageBalanceHistoricalQueryParamsSchema = z.infer<typeof usageBalanceHistoricalQueryParamsSchema>;
 /**
  * @description Array of balances.
@@ -83,12 +87,12 @@ export const usageBalanceHistoricalQueryResponseSchema = z.object({ "data": z.ar
 export type UsageBalanceHistoricalQueryResponseSchema = z.infer<typeof usageBalanceHistoricalQueryResponseSchema>;
 
 
-export const usageHeadQueryParamsSchema = z.object({ "limit": z.coerce.number().optional(), "page": z.coerce.number().optional() }).optional();
+export const usageHeadQueryParamsSchema = z.object({ "limit": z.coerce.number().int().default(10).optional(), "page": z.coerce.number().int().default(1).optional() }).optional();
 export type UsageHeadQueryParamsSchema = z.infer<typeof usageHeadQueryParamsSchema>;
 /**
  * @description Head block information.
  */
-export const usageHead200Schema = z.object({ "data": z.array(z.object({ "block_num": z.coerce.number(), "block_id": z.coerce.string() })), "meta": z.lazy(() => responseMetadataSchema) });
+export const usageHead200Schema = z.object({ "data": z.array(z.object({ "block_num": z.coerce.number().int(), "block_id": z.coerce.string() })), "meta": z.lazy(() => responseMetadataSchema) });
 export type UsageHead200Schema = z.infer<typeof usageHead200Schema>;
 /**
  * @description An unexpected error response.
@@ -98,7 +102,7 @@ export type UsageHeadErrorSchema = z.infer<typeof usageHeadErrorSchema>;
 /**
  * @description Head block information.
  */
-export const usageHeadQueryResponseSchema = z.object({ "data": z.array(z.object({ "block_num": z.coerce.number(), "block_id": z.coerce.string() })), "meta": z.lazy(() => responseMetadataSchema) });
+export const usageHeadQueryResponseSchema = z.object({ "data": z.array(z.object({ "block_num": z.coerce.number().int(), "block_id": z.coerce.string() })), "meta": z.lazy(() => responseMetadataSchema) });
 export type UsageHeadQueryResponseSchema = z.infer<typeof usageHeadQueryResponseSchema>;
 
  /**
@@ -118,7 +122,7 @@ export const monitoringHealthQueryResponseSchema = z.coerce.string();
 export type MonitoringHealthQueryResponseSchema = z.infer<typeof monitoringHealthQueryResponseSchema>;
 
 
-export const usageHoldersQueryParamsSchema = z.object({ "contract": z.coerce.string(), "symcode": z.coerce.string(), "limit": z.coerce.number().optional(), "page": z.coerce.number().optional() });
+export const usageHoldersQueryParamsSchema = z.object({ "contract": z.coerce.string(), "symcode": z.coerce.string(), "limit": z.coerce.number().int().default(10).optional(), "page": z.coerce.number().int().default(1).optional() });
 export type UsageHoldersQueryParamsSchema = z.infer<typeof usageHoldersQueryParamsSchema>;
 /**
  * @description Array of accounts.
@@ -155,21 +159,19 @@ export type MonitoringMetricsQueryResponseSchema = z.infer<typeof monitoringMetr
  /**
  * @description The OpenAPI JSON spec
  */
-export const docsOpenapi200Schema = z.object({});
+export const docsOpenapi200Schema = z.any();
 export type DocsOpenapi200Schema = z.infer<typeof docsOpenapi200Schema>;
 /**
  * @description An unexpected error response.
  */
 export const docsOpenapiErrorSchema = z.lazy(() => apiErrorSchema);
 export type DocsOpenapiErrorSchema = z.infer<typeof docsOpenapiErrorSchema>;
-/**
- * @description The OpenAPI JSON spec
- */
-export const docsOpenapiQueryResponseSchema = z.object({});
+
+ export const docsOpenapiQueryResponseSchema = z.any();
 export type DocsOpenapiQueryResponseSchema = z.infer<typeof docsOpenapiQueryResponseSchema>;
 
 
-export const usageSupplyQueryParamsSchema = z.object({ "block_num": z.coerce.number().optional(), "issuer": z.coerce.string().optional(), "contract": z.coerce.string(), "symcode": z.coerce.string(), "limit": z.coerce.number().optional(), "page": z.coerce.number().optional() });
+export const usageSupplyQueryParamsSchema = z.object({ "block_num": z.coerce.number().int().optional(), "issuer": z.coerce.string().optional(), "contract": z.coerce.string(), "symcode": z.coerce.string(), "limit": z.coerce.number().int().default(10).optional(), "page": z.coerce.number().int().default(1).optional() });
 export type UsageSupplyQueryParamsSchema = z.infer<typeof usageSupplyQueryParamsSchema>;
 /**
  * @description Array of supplies.
@@ -188,7 +190,7 @@ export const usageSupplyQueryResponseSchema = z.object({ "data": z.array(z.lazy(
 export type UsageSupplyQueryResponseSchema = z.infer<typeof usageSupplyQueryResponseSchema>;
 
 
-export const usageTokensQueryParamsSchema = z.object({ "limit": z.coerce.number().optional(), "page": z.coerce.number().optional() }).optional();
+export const usageTokensQueryParamsSchema = z.object({ "limit": z.coerce.number().int().default(10).optional(), "page": z.coerce.number().int().default(1).optional() }).optional();
 export type UsageTokensQueryParamsSchema = z.infer<typeof usageTokensQueryParamsSchema>;
 /**
  * @description Array of token identifier.
@@ -207,7 +209,7 @@ export const usageTokensQueryResponseSchema = z.object({ "data": z.array(z.lazy(
 export type UsageTokensQueryResponseSchema = z.infer<typeof usageTokensQueryResponseSchema>;
 
 
-export const usageTransfersQueryParamsSchema = z.object({ "block_range": z.array(z.coerce.number()).optional(), "contract": z.coerce.string(), "symcode": z.coerce.string(), "limit": z.coerce.number().optional(), "page": z.coerce.number().optional() });
+export const usageTransfersQueryParamsSchema = z.object({ "block_range": z.lazy(() => blockRangeSchema).optional(), "contract": z.coerce.string(), "symcode": z.coerce.string(), "limit": z.coerce.number().int().default(10).optional(), "page": z.coerce.number().int().default(1).optional() });
 export type UsageTransfersQueryParamsSchema = z.infer<typeof usageTransfersQueryParamsSchema>;
 /**
  * @description Array of transfers.
@@ -226,7 +228,7 @@ export const usageTransfersQueryResponseSchema = z.object({ "data": z.array(z.la
 export type UsageTransfersQueryResponseSchema = z.infer<typeof usageTransfersQueryResponseSchema>;
 
 
-export const usageTransfersAccountQueryParamsSchema = z.object({ "account": z.coerce.string(), "block_range": z.array(z.coerce.number()).optional(), "from": z.coerce.string().optional(), "to": z.coerce.string().optional(), "contract": z.coerce.string().optional(), "symcode": z.coerce.string().optional(), "limit": z.coerce.number().optional(), "page": z.coerce.number().optional() });
+export const usageTransfersAccountQueryParamsSchema = z.object({ "account": z.coerce.string(), "block_range": z.lazy(() => blockRangeSchema).optional(), "from": z.coerce.string().optional(), "to": z.coerce.string().optional(), "contract": z.coerce.string().optional(), "symcode": z.coerce.string().optional(), "limit": z.coerce.number().int().default(10).optional(), "page": z.coerce.number().int().default(1).optional() });
 export type UsageTransfersAccountQueryParamsSchema = z.infer<typeof usageTransfersAccountQueryParamsSchema>;
 /**
  * @description Array of transfers.
@@ -245,7 +247,7 @@ export const usageTransfersAccountQueryResponseSchema = z.object({ "data": z.arr
 export type UsageTransfersAccountQueryResponseSchema = z.infer<typeof usageTransfersAccountQueryResponseSchema>;
 
 
-export const usageTransferIdQueryParamsSchema = z.object({ "trx_id": z.coerce.string(), "limit": z.coerce.number().optional(), "page": z.coerce.number().optional() });
+export const usageTransferIdQueryParamsSchema = z.object({ "trx_id": z.coerce.string(), "limit": z.coerce.number().int().default(10).optional(), "page": z.coerce.number().int().default(1).optional() });
 export type UsageTransferIdQueryParamsSchema = z.infer<typeof usageTransferIdQueryParamsSchema>;
 /**
  * @description Array of transfers.
diff --git a/src/typespec/openapi3.tsp b/src/typespec/openapi3.tsp
index 9f7d049..be17340 100644
--- a/src/typespec/openapi3.tsp
+++ b/src/typespec/openapi3.tsp
@@ -1,7 +1,6 @@
 import "@typespec/http";
 import "@typespec/openapi";
 import "./models.tsp";
-import "./config.js";
 
 using TypeSpec.Http;
 using TypeSpec.OpenAPI;
@@ -13,7 +12,7 @@ using TypeSpec.OpenAPI;
         name: "MIT",
         url: "https://github.com/pinax-network/antelope-token-api/blob/4f4bf36341b794c0ccf5b7a14fdf810be06462d2/LICENSE"
     },
-    version: "6.0.0"
+    version: "6.0.1"
 }) // From @typespec/openapi
 //@server("https://eos.api.pinax.network/v1", "EOS V1 Api Endpoint")
 namespace AntelopeTokenApi;
@@ -83,6 +82,9 @@ model UsageResponse<T> {
     meta: ResponseMetadata;
 }
 
+@maxItems(2)
+model BlockRange is BlockInfo.block_num[];
+
 // Alias will *not* be present in the OpenAPI components.
 // This also helps preventing self-references in generated `components` for codegen to work properly.
 alias ApiResponse<T> = T | ApiError;
@@ -189,7 +191,7 @@ interface Usage {
     @get
     @useAuth(ApiKeyAuth<ApiKeyLocation.header, ApiKeyHeader>)
     transfers(
-        @query({ format: "csv"}) block_range?: BlockInfo.block_num[],
+        @query(#{ explode: false }) block_range?: BlockRange,
         @query contract: TokenIdentifier.contract,
         @query symcode: TokenIdentifier.symcode,
         ...PaginationQueryParams,
@@ -205,7 +207,7 @@ interface Usage {
     @useAuth(ApiKeyAuth<ApiKeyLocation.header, ApiKeyHeader>)
     transfersAccount(
         @query account: BalanceChange.account,
-        @query({ format: "csv"}) block_range?: BlockInfo.block_num[],
+        @query(#{ explode: false }) block_range?: BlockRange,
         @query from?: Transfer.from,
         @query to?: Transfer.to,
         @query contract?: TokenIdentifier.contract,
@@ -244,7 +246,7 @@ interface Docs {
     @summary("OpenAPI JSON spec")
     @route("/openapi")
     @get
-    openapi(): ApiResponse<Record<unknown>>;
+    openapi(): ApiResponse<{}>;
 
     /**
         Api version and Git short commit hash.
diff --git a/src/usage.ts b/src/usage.ts
index 74bb9c2..e51ecc2 100644
--- a/src/usage.ts
+++ b/src/usage.ts
@@ -43,7 +43,7 @@ export async function makeUsageQuery(ctx: Context, endpoint: UsageEndpoints, use
     let query = "";
     let additional_query_params: AdditionalQueryParams = {};
 
-    // Parse block range for endpoints that uses it. Check for single value or two comma-separated values.
+    // Parse block range for endpoints that uses it. Check for single value or two values.
     if (endpoint == "/transfers" || endpoint == "/transfers/account") {
         const q = query_params as ValidUserParams<typeof endpoint>;
         if (q.block_range) {
diff --git a/static/@openapi-to-graphql/graphql/schema.graphql b/static/@openapi-to-graphql/graphql/schema.graphql
index 916e645..9b2d06e 100644
--- a/static/@openapi-to-graphql/graphql/schema.graphql
+++ b/static/@openapi-to-graphql/graphql/schema.graphql
@@ -41,13 +41,6 @@ type Query {
   """
   metrics: String
 
-  """
-  Reflection endpoint to return OpenAPI JSON spec. Also used by Swagger to generate the frontpage.
-  
-  Equivalent to GET /openapi
-  """
-  openapi: JSON
-
   """
   Total supply for a token.
   
@@ -162,11 +155,6 @@ type Holder {
   balance: Float!
 }
 
-"""
-The `JSON` scalar type represents JSON values as specified by [ECMA-404](http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-404.pdf).
-"""
-scalar JSON @specifiedBy(url: "http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-404.pdf")
-
 type Supply {
   data: [Supply2]!
   meta: ResponseMetadata!
diff --git a/static/@typespec/openapi3/openapi.json b/static/@typespec/openapi3/openapi.json
index a8d7f12..54e5297 100644
--- a/static/@typespec/openapi3/openapi.json
+++ b/static/@typespec/openapi3/openapi.json
@@ -7,7 +7,7 @@
       "name": "MIT",
       "url": "https://github.com/pinax-network/antelope-token-api/blob/4f4bf36341b794c0ccf5b7a14fdf810be06462d2/LICENSE"
     },
-    "version": "6.0.0"
+    "version": "6.0.1"
   },
   "tags": [
     {
@@ -23,9 +23,6 @@
   "paths": {
     "/balance": {
       "get": {
-        "tags": [
-          "Usage"
-        ],
         "operationId": "Usage_balance",
         "summary": "Token balances",
         "description": "Token balances of an account.",
@@ -36,7 +33,8 @@
             "required": true,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "contract",
@@ -44,7 +42,8 @@
             "required": false,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "symcode",
@@ -52,7 +51,8 @@
             "required": false,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "limit",
@@ -62,7 +62,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 10
-            }
+            },
+            "explode": false
           },
           {
             "name": "page",
@@ -72,7 +73,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 1
-            }
+            },
+            "explode": false
           }
         ],
         "responses": {
@@ -112,6 +114,9 @@
             }
           }
         },
+        "tags": [
+          "Usage"
+        ],
         "security": [
           {
             "ApiKeyAuth": []
@@ -121,9 +126,6 @@
     },
     "/balance/historical": {
       "get": {
-        "tags": [
-          "Usage"
-        ],
         "operationId": "Usage_balanceHistorical",
         "summary": "Historical token balances",
         "description": "Historical token balances of an account.",
@@ -134,7 +136,8 @@
             "required": true,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "block_num",
@@ -143,7 +146,8 @@
             "schema": {
               "type": "integer",
               "format": "uint64"
-            }
+            },
+            "explode": false
           },
           {
             "name": "contract",
@@ -151,7 +155,8 @@
             "required": false,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "symcode",
@@ -159,7 +164,8 @@
             "required": false,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "limit",
@@ -169,7 +175,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 10
-            }
+            },
+            "explode": false
           },
           {
             "name": "page",
@@ -179,7 +186,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 1
-            }
+            },
+            "explode": false
           }
         ],
         "responses": {
@@ -219,6 +227,9 @@
             }
           }
         },
+        "tags": [
+          "Usage"
+        ],
         "security": [
           {
             "ApiKeyAuth": []
@@ -228,9 +239,6 @@
     },
     "/head": {
       "get": {
-        "tags": [
-          "Usage"
-        ],
         "operationId": "Usage_head",
         "summary": "Head block information",
         "description": "Current head block for which data is available (can be lower than head block of the chain).",
@@ -243,7 +251,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 10
-            }
+            },
+            "explode": false
           },
           {
             "name": "page",
@@ -253,7 +262,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 1
-            }
+            },
+            "explode": false
           }
         ],
         "responses": {
@@ -305,14 +315,14 @@
               }
             }
           }
-        }
+        },
+        "tags": [
+          "Usage"
+        ]
       }
     },
     "/health": {
       "get": {
-        "tags": [
-          "Monitoring"
-        ],
         "operationId": "Monitoring_health",
         "summary": "Health check",
         "description": "Checks database connection.",
@@ -338,14 +348,14 @@
               }
             }
           }
-        }
+        },
+        "tags": [
+          "Monitoring"
+        ]
       }
     },
     "/holders": {
       "get": {
-        "tags": [
-          "Usage"
-        ],
         "operationId": "Usage_holders",
         "summary": "Token holders",
         "description": "List of holders of a token.",
@@ -356,7 +366,8 @@
             "required": true,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "symcode",
@@ -364,7 +375,8 @@
             "required": true,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "limit",
@@ -374,7 +386,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 10
-            }
+            },
+            "explode": false
           },
           {
             "name": "page",
@@ -384,7 +397,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 1
-            }
+            },
+            "explode": false
           }
         ],
         "responses": {
@@ -424,6 +438,9 @@
             }
           }
         },
+        "tags": [
+          "Usage"
+        ],
         "security": [
           {
             "ApiKeyAuth": []
@@ -433,9 +450,6 @@
     },
     "/metrics": {
       "get": {
-        "tags": [
-          "Monitoring"
-        ],
         "operationId": "Monitoring_metrics",
         "summary": "Prometheus metrics",
         "description": "Prometheus metrics.",
@@ -461,29 +475,21 @@
               }
             }
           }
-        }
+        },
+        "tags": [
+          "Monitoring"
+        ]
       }
     },
     "/openapi": {
       "get": {
-        "tags": [
-          "Docs"
-        ],
         "operationId": "Docs_openapi",
         "summary": "OpenAPI JSON spec",
         "description": "Reflection endpoint to return OpenAPI JSON spec. Also used by Swagger to generate the frontpage.",
         "parameters": [],
         "responses": {
           "200": {
-            "description": "The OpenAPI JSON spec",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "type": "object",
-                  "additionalProperties": {}
-                }
-              }
-            }
+            "description": "The OpenAPI JSON spec"
           },
           "default": {
             "description": "An unexpected error response.",
@@ -495,14 +501,14 @@
               }
             }
           }
-        }
+        },
+        "tags": [
+          "Docs"
+        ]
       }
     },
     "/supply": {
       "get": {
-        "tags": [
-          "Usage"
-        ],
         "operationId": "Usage_supply",
         "summary": "Token supply",
         "description": "Total supply for a token.",
@@ -514,7 +520,8 @@
             "schema": {
               "type": "integer",
               "format": "uint64"
-            }
+            },
+            "explode": false
           },
           {
             "name": "issuer",
@@ -522,7 +529,8 @@
             "required": false,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "contract",
@@ -530,7 +538,8 @@
             "required": true,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "symcode",
@@ -538,7 +547,8 @@
             "required": true,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "limit",
@@ -548,7 +558,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 10
-            }
+            },
+            "explode": false
           },
           {
             "name": "page",
@@ -558,7 +569,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 1
-            }
+            },
+            "explode": false
           }
         ],
         "responses": {
@@ -598,6 +610,9 @@
             }
           }
         },
+        "tags": [
+          "Usage"
+        ],
         "security": [
           {
             "ApiKeyAuth": []
@@ -607,9 +622,6 @@
     },
     "/tokens": {
       "get": {
-        "tags": [
-          "Usage"
-        ],
         "operationId": "Usage_tokens",
         "summary": "Tokens",
         "description": "List of available tokens.",
@@ -622,7 +634,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 10
-            }
+            },
+            "explode": false
           },
           {
             "name": "page",
@@ -632,7 +645,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 1
-            }
+            },
+            "explode": false
           }
         ],
         "responses": {
@@ -672,6 +686,9 @@
             }
           }
         },
+        "tags": [
+          "Usage"
+        ],
         "security": [
           {
             "ApiKeyAuth": []
@@ -681,9 +698,6 @@
     },
     "/transfers": {
       "get": {
-        "tags": [
-          "Usage"
-        ],
         "operationId": "Usage_transfers",
         "summary": "Token transfers",
         "description": "All transfers related to a token.",
@@ -693,13 +707,8 @@
             "in": "query",
             "required": false,
             "schema": {
-              "type": "array",
-              "items": {
-                "type": "integer",
-                "format": "uint64"
-              }
+              "$ref": "#/components/schemas/BlockRange"
             },
-            "style": "form",
             "explode": false
           },
           {
@@ -708,7 +717,8 @@
             "required": true,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "symcode",
@@ -716,7 +726,8 @@
             "required": true,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "limit",
@@ -726,7 +737,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 10
-            }
+            },
+            "explode": false
           },
           {
             "name": "page",
@@ -736,7 +748,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 1
-            }
+            },
+            "explode": false
           }
         ],
         "responses": {
@@ -776,6 +789,9 @@
             }
           }
         },
+        "tags": [
+          "Usage"
+        ],
         "security": [
           {
             "ApiKeyAuth": []
@@ -785,9 +801,6 @@
     },
     "/transfers/account": {
       "get": {
-        "tags": [
-          "Usage"
-        ],
         "operationId": "Usage_transfersAccount",
         "summary": "Token transfers from and to an account",
         "description": "All transfers related to an account.",
@@ -798,20 +811,16 @@
             "required": true,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "block_range",
             "in": "query",
             "required": false,
             "schema": {
-              "type": "array",
-              "items": {
-                "type": "integer",
-                "format": "uint64"
-              }
+              "$ref": "#/components/schemas/BlockRange"
             },
-            "style": "form",
             "explode": false
           },
           {
@@ -820,7 +829,8 @@
             "required": false,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "to",
@@ -828,7 +838,8 @@
             "required": false,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "contract",
@@ -836,7 +847,8 @@
             "required": false,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "symcode",
@@ -844,7 +856,8 @@
             "required": false,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "limit",
@@ -854,7 +867,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 10
-            }
+            },
+            "explode": false
           },
           {
             "name": "page",
@@ -864,7 +878,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 1
-            }
+            },
+            "explode": false
           }
         ],
         "responses": {
@@ -904,6 +919,9 @@
             }
           }
         },
+        "tags": [
+          "Usage"
+        ],
         "security": [
           {
             "ApiKeyAuth": []
@@ -913,9 +931,6 @@
     },
     "/transfers/id": {
       "get": {
-        "tags": [
-          "Usage"
-        ],
         "operationId": "Usage_transferId",
         "summary": "Token transfer",
         "description": "Specific transfer related to a token.",
@@ -926,7 +941,8 @@
             "required": true,
             "schema": {
               "type": "string"
-            }
+            },
+            "explode": false
           },
           {
             "name": "limit",
@@ -936,7 +952,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 10
-            }
+            },
+            "explode": false
           },
           {
             "name": "page",
@@ -946,7 +963,8 @@
               "type": "integer",
               "format": "uint64",
               "default": 1
-            }
+            },
+            "explode": false
           }
         ],
         "responses": {
@@ -986,6 +1004,9 @@
             }
           }
         },
+        "tags": [
+          "Usage"
+        ],
         "security": [
           {
             "ApiKeyAuth": []
@@ -995,9 +1016,6 @@
     },
     "/version": {
       "get": {
-        "tags": [
-          "Docs"
-        ],
         "operationId": "Docs_version",
         "summary": "Api version",
         "description": "Api version and Git short commit hash.",
@@ -1023,7 +1041,10 @@
               }
             }
           }
-        }
+        },
+        "tags": [
+          "Docs"
+        ]
       }
     }
   },
@@ -1155,6 +1176,14 @@
           }
         }
       },
+      "BlockRange": {
+        "type": "array",
+        "items": {
+          "type": "integer",
+          "format": "uint64"
+        },
+        "maxItems": 2
+      },
       "Holder": {
         "type": "object",
         "required": [