diff --git a/src/client.ts b/src/client.ts
index 9a740d2..8d45a18 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -13,6 +13,8 @@ import type {
   VerifyResult,
   IdentifyInput,
   IdentifyResult,
+  CrossCollectionSearchInput,
+  CrossCollectionSearchResult,
   CompareInput,
   LivenessInput,
   LivenessResult,
@@ -408,6 +410,16 @@ export class FacesResource {
     );
   }
 
+  /** Search for matching faces across multiple or all collections. */
+  async search(input: CrossCollectionSearchInput): Promise<CrossCollectionSearchResult> {
+    const form = new FormData();
+    form.append("image", await toBlob(input.image), input.filename ?? "image.jpg");
+    if (input.collectionIds?.length) form.append("collection_ids", input.collectionIds.join(","));
+    if (input.topK !== undefined) form.append("top_k", String(input.topK));
+    if (input.threshold !== undefined) form.append("threshold", String(input.threshold));
+    return this.client._request<CrossCollectionSearchResult>("POST", "/search", { formData: form });
+  }
+
   /**
    * Liveness detection — check whether the face in the image is live (anti-spoofing).
    */
diff --git a/src/index.ts b/src/index.ts
index 3f70f2f..7b0cb05 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -20,6 +20,10 @@ export type {
     IdentifyMatch,
     IdentifyInput,
     IdentifyResult,
+    CrossCollectionSearchInput,
+    CrossCollectionSearchMatch,
+    CrossCollectionSearchResult,
+    SkippedCollection,
     DetectedFace,
     CompareInput,
     LivenessInput,
diff --git a/src/types.ts b/src/types.ts
index 9c68971..4799d15 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -128,6 +128,33 @@ export interface IdentifyResult {
     imageSize?: ImageSize
 }
 
+export interface CrossCollectionSearchInput {
+    image: Blob | Buffer | ArrayBuffer
+    collectionIds?: string[]
+    topK?: number
+    threshold?: number
+    filename?: string
+}
+
+export interface CrossCollectionSearchMatch extends IdentifyMatch {
+    collectionId: string
+}
+
+export interface SkippedCollection {
+    id: string
+    name: string
+    reason: string
+}
+
+export interface CrossCollectionSearchResult {
+    matches: CrossCollectionSearchMatch[]
+    queryTimeMs: number
+    collectionsSearched: number
+    skippedCollections: SkippedCollection[]
+    detectedFaces?: DetectedFace[]
+    imageSize?: ImageSize
+}
+
 export interface CompareInput {
     image1: Blob | Buffer | ArrayBuffer
     image2: Blob | Buffer | ArrayBuffer
diff --git a/test/contract.test.js b/test/contract.test.js
index 313be0f..b9dba67 100644
--- a/test/contract.test.js
+++ b/test/contract.test.js
@@ -37,6 +37,7 @@ const cases = {
         delete: (f) => f.delete(col, 'face_1'),
         verify: (f) => f.verify(col, { image: img(), faceId: 'face_1', threshold: 0.5 }),
         identify: (f) => f.identify(col, { image: img(), topK: 3, threshold: 0.5 }),
+        search: (f) => f.search({ image: img(), collectionIds: ['col_1', 'col_2'], topK: 3, threshold: 0.5 }),
         liveness: (f) => f.liveness(col, { image: img() }),
         activeLiveness: (f) => f.activeLiveness(col, Array.from({ length: 5 }, img)),
         createLivenessSession: (f) => f.createLivenessSession(col),
diff --git a/test/faces.test.js b/test/faces.test.js
index 476424f..32ab6c6 100644
--- a/test/faces.test.js
+++ b/test/faces.test.js
@@ -140,6 +140,17 @@ test('activeLiveness surfaces IMAGE_REQUIRED', async () => {
 
 const face = { id: 'f1', collectionId: 'col_1', externalId: 'u1', metadata: {}, createdAt: 'x' }
 
+test('search parses skipped collections and surfaces typed profile mismatch', async () => {
+    stubFetch(200, { success: true, data: { matches: [], queryTimeMs: 8, collectionsSearched: 1, skippedCollections: [{ id: 'c2', name: 'Legacy', reason: 'embedding_profile_mismatch' }] } })
+    const result = await client.faces.search({ image: img(), collectionIds: ['c1', 'c2'], topK: 3 })
+    assert.equal(calls[0].url, 'http://api.test/api/v1/search')
+    assert.equal(calls[0].init.body.get('collection_ids'), 'c1,c2')
+    assert.equal(result.skippedCollections[0].reason, 'embedding_profile_mismatch')
+
+    stubFetch(409, { success: false, error: { code: 'EMBEDDING_PROFILE_MISMATCH', message: 'no compatible collections' } })
+    await assert.rejects(client.faces.search({ image: img() }), (err) => err instanceof LiveXFaceApiError && err.statusCode === 409 && err.code === 'EMBEDDING_PROFILE_MISMATCH')
+})
+
 test('register sends liveness_token when given', async () => {
     stubFetch(201, { success: true, data: face })
     await client.faces.register('col_1', { externalId: 'u1', image: img(), livenessToken: 'lvt_abc' })