diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9ab3077..5728abe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [4.14.1] 2026-03-31
+### Fixed
+- Fix `organizations.checkDomainIsAvailable` to call `GET /organizations/domain-check` with query params (instead of an unsupported `PUT` payload flow).
+- Align method input naming to query semantics for clearer usage (`query`).
+
 ## [4.14.0] 2026-03-04
 ### Added
 - Add `facturapi.comercioExteriorCatalogs.searchTariffFractions` method for Fracción Arancelaria SAT catalog
diff --git a/package-lock.json b/package-lock.json
index 4904040..06ac67c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "facturapi",
-  "version": "4.14.0",
+  "version": "4.14.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "facturapi",
-      "version": "4.14.0",
+      "version": "4.14.1",
       "license": "MIT",
       "devDependencies": {
         "@eslint/js": "^10.0.1",
diff --git a/package.json b/package.json
index 42a4a54..d17ea29 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "facturapi",
-  "version": "4.14.0",
+  "version": "4.14.1",
   "description": "Librería oficial de Facturapi. Crea CFDIs timbrados y enviados al SAT, XML y PDF",
   "main": "dist/index.cjs.js",
   "module": "dist/index.es.js",
diff --git a/src/resources/organizations.ts b/src/resources/organizations.ts
index a4aab1a..264fde2 100644
--- a/src/resources/organizations.ts
+++ b/src/resources/organizations.ts
@@ -168,7 +168,7 @@ export default class Organizations {
   checkDomainIsAvailable(
     data: Record<string, any>,
   ): Promise<{ available: boolean }> {
-    return this.client.put('/organizations/domain-check', { body: data });
+    return this.client.get('/organizations/domain-check', { params: data });
   }
 
   /**
diff --git a/test/node/runtime-compat.node.test.ts b/test/node/runtime-compat.node.test.ts
index d321dc7..515a5f2 100644
--- a/test/node/runtime-compat.node.test.ts
+++ b/test/node/runtime-compat.node.test.ts
@@ -78,6 +78,31 @@ describe('runtime compatibility (node)', () => {
     expect(invoice.id).toBe('inv_123');
   });
 
+  it('checks domain availability via GET query params', async () => {
+    const client = createClient();
+
+    globalThis.fetch = vi.fn(async (url, options) => {
+      expect(url).toBe(
+        'https://api.test.local/v2/organizations/domain-check?domain=empresa-demo',
+      );
+      expect(options?.method).toBe('GET');
+      expect(getHeader(options?.headers, 'Authorization')).toBe(
+        'Bearer sk_test_123',
+      );
+
+      return new Response(JSON.stringify({ available: true }), {
+        status: 200,
+        headers: { 'content-type': 'application/json' },
+      });
+    }) as typeof fetch;
+
+    const result = await client.organizations.checkDomainIsAvailable({
+      domain: 'empresa-demo',
+    });
+
+    expect(result.available).toBe(true);
+  });
+
   it('surfaces API message from non-OK JSON responses', async () => {
     const client = createClient();