diff --git a/js/plugins/pinecone/package.json b/js/plugins/pinecone/package.json
index 1117174b21..e274616e25 100644
--- a/js/plugins/pinecone/package.json
+++ b/js/plugins/pinecone/package.json
@@ -20,7 +20,8 @@
     "compile": "tsup-node",
     "build:clean": "rimraf ./lib",
     "build": "npm-run-all build:clean check compile",
-    "build:watch": "tsup-node --watch"
+    "build:watch": "tsup-node --watch",
+    "test": "node --import tsx --test tests/*_test.ts"
   },
   "repository": {
     "type": "git",
diff --git a/js/plugins/pinecone/src/index.ts b/js/plugins/pinecone/src/index.ts
index 3f86f364d9..b91629e437 100644
--- a/js/plugins/pinecone/src/index.ts
+++ b/js/plugins/pinecone/src/index.ts
@@ -31,6 +31,7 @@ import {
   retrieverRef,
 } from 'genkit/retriever';
 import { Md5 } from 'ts-md5';
+import { toPineconeQuery } from './query.js';
 
 const SparseVectorSchema = z
   .object({
@@ -185,12 +186,13 @@ export function configurePineconeRetriever<
       const scopedIndex = !!options.namespace
         ? index.namespace(options.namespace)
         : index;
-      const response = await scopedIndex.query({
-        topK: options.k,
-        vector: queryEmbeddings[0].embedding,
-        includeValues: false,
-        includeMetadata: true,
-      });
+      const embedding = queryEmbeddings[0]?.embedding;
+      if (!embedding) {
+        throw new Error('No embedding returned from the embedder.');
+      }
+      const response = await scopedIndex.query(
+        toPineconeQuery(options, embedding)
+      );
       return {
         documents: response.matches
           .map((m) => m.metadata)
diff --git a/js/plugins/pinecone/src/query.ts b/js/plugins/pinecone/src/query.ts
new file mode 100644
index 0000000000..af126b06fc
--- /dev/null
+++ b/js/plugins/pinecone/src/query.ts
@@ -0,0 +1,41 @@
+/**
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Builds the Pinecone query request from retriever options.
+ */
+export function toPineconeQuery(
+  options: {
+    k: number;
+    filter?: Record<string, any>;
+    sparseVector?: {
+      indices: number[];
+      values: number[];
+    };
+  },
+  embedding: number[]
+) {
+  return {
+    topK: options.k,
+    vector: embedding,
+    includeValues: false as const,
+    includeMetadata: true as const,
+    ...(options.filter !== undefined ? { filter: options.filter } : {}),
+    ...(options.sparseVector !== undefined
+      ? { sparseVector: options.sparseVector }
+      : {}),
+  };
+}
diff --git a/js/plugins/pinecone/tests/retriever_test.ts b/js/plugins/pinecone/tests/retriever_test.ts
new file mode 100644
index 0000000000..5ae84d1490
--- /dev/null
+++ b/js/plugins/pinecone/tests/retriever_test.ts
@@ -0,0 +1,52 @@
+/**
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import * as assert from 'assert';
+import { describe, it } from 'node:test';
+import { toPineconeQuery } from '../src/query.js';
+
+describe('toPineconeQuery', () => {
+  it('includes filter when provided', () => {
+    const filter = { category: { $eq: 'appliances' } };
+    assert.deepStrictEqual(toPineconeQuery({ k: 10, filter }, [0.1, 0.2]), {
+      topK: 10,
+      vector: [0.1, 0.2],
+      includeValues: false,
+      includeMetadata: true,
+      filter,
+    });
+  });
+
+  it('omits filter when not provided', () => {
+    assert.deepStrictEqual(toPineconeQuery({ k: 5 }, [0.3]), {
+      topK: 5,
+      vector: [0.3],
+      includeValues: false,
+      includeMetadata: true,
+    });
+  });
+
+  it('includes sparseVector when provided', () => {
+    const sparseVector = { indices: [1, 2], values: [0.1, 0.2] };
+    assert.deepStrictEqual(toPineconeQuery({ k: 5, sparseVector }, [0.3]), {
+      topK: 5,
+      vector: [0.3],
+      includeValues: false,
+      includeMetadata: true,
+      sparseVector,
+    });
+  });
+});