diff --git a/packages/catalog-client/src/types/api.ts b/packages/catalog-client/src/types/api.ts
index a99f36573e..64d01c0972 100644
--- a/packages/catalog-client/src/types/api.ts
+++ b/packages/catalog-client/src/types/api.ts
@@ -423,7 +423,7 @@ export type QueryEntitiesRequest =
  *
  * @remarks
  *
- * Either `filter` or `query` can be provided, but not both:
+ * Either `filter` or `query` can be provided, or even both:
  * - `filter`: Uses the traditional key-value filter syntax (GET endpoint)
  * - `query`: Uses the predicate-based filter syntax with logical operators (POST endpoint)
  *
@@ -434,12 +434,11 @@ export type QueryEntitiesInitialRequest = {
   limit?: number;
   offset?: number;
   /**
-   * Traditional key-value based filter. Mutually exclusive with `query`.
+   * Traditional key-value based filter.
    */
   filter?: EntityFilterQuery;
   /**
    * Predicate-based filter with logical operators ($all, $any, $not, $exists, $in, $hasPrefix).
-   * Mutually exclusive with `filter`.
    *
    * @example
    * ```typescript
diff --git a/plugins/catalog-backend/src/service/DefaultEntitiesCatalog.ts b/plugins/catalog-backend/src/service/DefaultEntitiesCatalog.ts
index 11bce7bd86..dab605d176 100644
--- a/plugins/catalog-backend/src/service/DefaultEntitiesCatalog.ts
+++ b/plugins/catalog-backend/src/service/DefaultEntitiesCatalog.ts
@@ -18,7 +18,6 @@ import { Entity, stringifyEntityRef } from '@backstage/catalog-model';
 import { InputError, NotFoundError } from '@backstage/errors';
 import { Knex } from 'knex';
 import { chunk as lodashChunk, isEqual } from 'lodash';
-import { z } from 'zod';
 import {
   Cursor,
   EntitiesBatchRequest,
@@ -49,7 +48,6 @@ import {
   isQueryEntitiesCursorRequest,
   isQueryEntitiesInitialRequest,
 } from './util';
-import { EntityFilter } from '@backstage/plugin-catalog-node';
 import { LoggerService } from '@backstage/backend-plugin-api';
 import { applyEntityFilterToQuery } from './request/applyEntityFilterToQuery';
 import { processRawEntitiesResult } from './response';
@@ -714,29 +712,6 @@ export class DefaultEntitiesCatalog implements EntitiesCatalog {
   }
 }
 
-const entityFilterParser: z.ZodSchema<EntityFilter> = z.lazy(() =>
-  z
-    .object({
-      key: z.string(),
-      values: z.array(z.string()).optional(),
-    })
-    .or(z.object({ not: entityFilterParser }))
-    .or(z.object({ anyOf: z.array(entityFilterParser) }))
-    .or(z.object({ allOf: z.array(entityFilterParser) })),
-);
-
-export const cursorParser: z.ZodSchema<Cursor> = z.object({
-  orderFields: z.array(
-    z.object({ field: z.string(), order: z.enum(['asc', 'desc']) }),
-  ),
-  orderFieldValues: z.array(z.string().or(z.null())),
-  filter: entityFilterParser.optional(),
-  isPrevious: z.boolean(),
-  query: z.string().optional(),
-  firstSortFieldValues: z.array(z.string().or(z.null())).optional(),
-  totalItems: z.number().optional(),
-});
-
 function parseCursorFromRequest(
   request?: QueryEntitiesRequest,
 ): Partial<Cursor> & { skipTotalItems: boolean } {