diff --git a/background.js b/background.js
index 0ecbd43..b566f8d 100644
--- a/background.js
+++ b/background.js
@@ -21,6 +21,7 @@ importScripts(
   'gopay-utils.js',
   'phone-sms/providers/hero-sms.js',
   'phone-sms/providers/five-sim.js',
+  'phone-sms/providers/nexsms.js',
   'phone-sms/providers/madao.js',
   'phone-sms/providers/registry.js',
   'background/phone-verification-flow.js',
diff --git a/phone-sms/providers/nexsms.js b/phone-sms/providers/nexsms.js
new file mode 100644
index 0000000..971dd1d
--- /dev/null
+++ b/phone-sms/providers/nexsms.js
@@ -0,0 +1,268 @@
+// phone-sms/providers/nexsms.js — NexSMS 接码平台适配层
+(function attachNexSmsProvider(root, factory) {
+  root.PhoneSmsNexSmsProvider = factory();
+})(typeof self !== 'undefined' ? self : globalThis, function createNexSmsProviderModule() {
+  const PROVIDER_ID = 'nexsms';
+  const DEFAULT_BASE_URL = 'https://api.nexsms.net';
+  const DEFAULT_SERVICE_CODE = 'ot';
+  const DEFAULT_SERVICE_LABEL = 'OpenAI';
+  const DEFAULT_COUNTRY_ID = 1;
+  const DEFAULT_COUNTRY_LABEL = 'Country #1';
+  const DEFAULT_REQUEST_TIMEOUT_MS = 20000;
+
+  function normalizeBaseUrl(value = '') {
+    const trimmed = String(value || '').trim() || DEFAULT_BASE_URL;
+    try {
+      return new URL(trimmed).toString().replace(/\/+$/, '');
+    } catch {
+      return DEFAULT_BASE_URL;
+    }
+  }
+
+  function normalizeText(value = '', fallback = '') {
+    return String(value || '').trim() || fallback;
+  }
+
+  function normalizeNexSmsCountryId(value, fallback = DEFAULT_COUNTRY_ID) {
+    const parsed = Math.floor(Number(value));
+    if (Number.isFinite(parsed) && parsed >= 0) {
+      return parsed;
+    }
+    const fallbackParsed = Math.floor(Number(fallback));
+    if (Number.isFinite(fallbackParsed) && fallbackParsed >= 0) {
+      return fallbackParsed;
+    }
+    return DEFAULT_COUNTRY_ID;
+  }
+
+  function normalizeNexSmsCountryLabel(value = '', fallback = DEFAULT_COUNTRY_LABEL) {
+    return normalizeText(value, fallback);
+  }
+
+  function normalizeNexSmsServiceCode(value = '', fallback = DEFAULT_SERVICE_CODE) {
+    const normalized = String(value || '').trim().toLowerCase().replace(/[^a-z0-9_-]+/g, '');
+    if (normalized) {
+      return normalized;
+    }
+    const fallbackNormalized = String(fallback || '').trim().toLowerCase().replace(/[^a-z0-9_-]+/g, '');
+    return fallbackNormalized || DEFAULT_SERVICE_CODE;
+  }
+
+  function normalizeNexSmsCountryOrder(value = []) {
+    const source = Array.isArray(value)
+      ? value
+      : String(value || '')
+        .split(/[\r\n,，;；]+/)
+        .map((entry) => String(entry || '').trim())
+        .filter(Boolean);
+    const normalized = [];
+    const seen = new Set();
+
+    source.forEach((entry) => {
+      let id = -1;
+      let label = '';
+      if (entry && typeof entry === 'object' && !Array.isArray(entry)) {
+        id = normalizeNexSmsCountryId(entry.id ?? entry.countryId, -1);
+        label = normalizeText(entry.label ?? entry.countryLabel, '');
+      } else {
+        const text = String(entry || '').trim();
+        const structured = text.match(/^(\d+)\s*(?:[:|/-]\s*(.+))?$/);
+        id = normalizeNexSmsCountryId(structured?.[1] || text, -1);
+        label = normalizeText(structured?.[2], '');
+      }
+      if (id < 0 || seen.has(id)) {
+        return;
+      }
+      seen.add(id);
+      normalized.push({
+        id,
+        label: label || `Country #${id}`,
+      });
+    });
+
+    return normalized.slice(0, 20);
+  }
+
+  function resolveCountryCandidates(state = {}) {
+    const candidates = normalizeNexSmsCountryOrder(state?.nexSmsCountryOrder);
+    if (candidates.length) {
+      return candidates;
+    }
+    return [{
+      id: normalizeNexSmsCountryId(state?.nexSmsCountryId, DEFAULT_COUNTRY_ID),
+      label: normalizeNexSmsCountryLabel(state?.nexSmsCountryLabel, DEFAULT_COUNTRY_LABEL),
+    }];
+  }
+
+  function parsePayload(text) {
+    const trimmed = String(text || '').trim();
+    if (!trimmed) {
+      return '';
+    }
+    try {
+      return JSON.parse(trimmed);
+    } catch {
+      return trimmed;
+    }
+  }
+
+  function describePayload(raw) {
+    if (typeof raw === 'string') {
+      return raw.trim();
+    }
+    if (raw && typeof raw === 'object') {
+      const message = normalizeText(raw.message || raw.error || raw.msg || raw.statusText, '');
+      if (message) {
+        return message;
+      }
+      try {
+        return JSON.stringify(raw);
+      } catch {
+        return String(raw);
+      }
+    }
+    return String(raw || '').trim();
+  }
+
+  function isSuccessPayload(payload) {
+    if (!payload || typeof payload !== 'object' || Array.isArray(payload)) {
+      return false;
+    }
+    return Number(payload.code) === 0;
+  }
+
+  function resolveConfig(state = {}, deps = {}) {
+    return {
+      apiKey: normalizeText(state?.nexSmsApiKey),
+      baseUrl: normalizeBaseUrl(state?.nexSmsBaseUrl || DEFAULT_BASE_URL),
+      serviceCode: normalizeNexSmsServiceCode(state?.nexSmsServiceCode, DEFAULT_SERVICE_CODE),
+      fetchImpl: deps.fetchImpl || (typeof fetch === 'function' ? fetch.bind(globalThis) : null),
+      requestTimeoutMs: deps.requestTimeoutMs || DEFAULT_REQUEST_TIMEOUT_MS,
+    };
+  }
+
+  async function fetchPayload(config, path, actionLabel, options = {}) {
+    if (!config.fetchImpl) {
+      throw new Error('NexSMS 网络请求实现不可用。');
+    }
+    if (!config.apiKey) {
+      throw new Error('NexSMS API Key 缺失，请先在侧边栏保存接码 API Key。');
+    }
+    const controller = typeof AbortController === 'function' ? new AbortController() : null;
+    const timeoutId = controller
+      ? setTimeout(() => controller.abort(), Number(config.requestTimeoutMs) || DEFAULT_REQUEST_TIMEOUT_MS)
+      : null;
+
+    try {
+      const method = String(options.method || 'GET').trim().toUpperCase() || 'GET';
+      const requestUrl = new URL(path.replace(/^\/+/, ''), `${config.baseUrl.replace(/\/+$/, '')}/`);
+      requestUrl.searchParams.set('apiKey', config.apiKey);
+      Object.entries(options.query || {}).forEach(([key, value]) => {
+        if (value === undefined || value === null || value === '') {
+          return;
+        }
+        requestUrl.searchParams.set(key, String(value));
+      });
+      const headers = {
+        Accept: 'application/json',
+        ...(options.headers && typeof options.headers === 'object' ? options.headers : {}),
+      };
+      const requestInit = {
+        method,
+        headers,
+        signal: controller?.signal,
+      };
+      if (method !== 'GET' && method !== 'HEAD' && options.body !== undefined) {
+        requestInit.body = typeof options.body === 'string'
+          ? options.body
+          : JSON.stringify(options.body);
+        if (!requestInit.headers['Content-Type']) {
+          requestInit.headers['Content-Type'] = 'application/json';
+        }
+      }
+      const response = await config.fetchImpl(requestUrl.toString(), requestInit);
+      const text = await response.text();
+      const payload = parsePayload(text);
+      if (!response.ok) {
+        const error = new Error(`${actionLabel}失败：${describePayload(payload) || response.status}`);
+        error.payload = payload;
+        error.status = response.status;
+        throw error;
+      }
+      return payload;
+    } catch (error) {
+      if (error?.name === 'AbortError') {
+        throw new Error(`${actionLabel}超时。`);
+      }
+      throw error;
+    } finally {
+      if (timeoutId) {
+        clearTimeout(timeoutId);
+      }
+    }
+  }
+
+  async function fetchBalance(state = {}, deps = {}) {
+    const config = resolveConfig(state, deps);
+    const payload = await fetchPayload(config, '/api/user/getBalance', 'NexSMS get balance');
+    if (!isSuccessPayload(payload)) {
+      throw new Error(`NexSMS get balance 失败：${describePayload(payload) || 'empty response'}`);
+    }
+    const balance = Number(payload?.data?.balance);
+    return {
+      balance: Number.isFinite(balance) ? balance : null,
+      raw: payload,
+    };
+  }
+
+  async function fetchPrices(state = {}, countryConfig = {}, deps = {}) {
+    const config = resolveConfig(state, deps);
+    const countryId = normalizeNexSmsCountryId(countryConfig?.id, DEFAULT_COUNTRY_ID);
+    return fetchPayload(config, '/api/getCountryByService', 'NexSMS getCountryByService', {
+      query: {
+        serviceCode: config.serviceCode,
+        countryId,
+      },
+    });
+  }
+
+  function createProvider(deps = {}) {
+    const providerDeps = {
+      fetchImpl: deps.fetchImpl,
+      requestTimeoutMs: deps.requestTimeoutMs || DEFAULT_REQUEST_TIMEOUT_MS,
+    };
+    return {
+      id: PROVIDER_ID,
+      label: 'NexSMS',
+      defaultCountryId: DEFAULT_COUNTRY_ID,
+      defaultCountryLabel: DEFAULT_COUNTRY_LABEL,
+      defaultProduct: DEFAULT_SERVICE_LABEL,
+      defaultServiceCode: DEFAULT_SERVICE_CODE,
+      normalizeCountryId: normalizeNexSmsCountryId,
+      normalizeCountryLabel: normalizeNexSmsCountryLabel,
+      normalizeCountryOrder: normalizeNexSmsCountryOrder,
+      normalizeServiceCode: normalizeNexSmsServiceCode,
+      resolveCountryCandidates,
+      fetchBalance: (state) => fetchBalance(state, providerDeps),
+      fetchPrices: (state, countryConfig) => fetchPrices(state, countryConfig, providerDeps),
+      describePayload,
+      isSuccessPayload,
+    };
+  }
+
+  return {
+    PROVIDER_ID,
+    DEFAULT_BASE_URL,
+    DEFAULT_COUNTRY_ID,
+    DEFAULT_COUNTRY_LABEL,
+    DEFAULT_SERVICE_CODE,
+    DEFAULT_SERVICE_LABEL,
+    createProvider,
+    describePayload,
+    isSuccessPayload,
+    normalizeNexSmsCountryId,
+    normalizeNexSmsCountryLabel,
+    normalizeNexSmsCountryOrder,
+    normalizeNexSmsServiceCode,
+  };
+});
diff --git a/sidepanel/sidepanel.html b/sidepanel/sidepanel.html
index 19809da..13855ad 100644
--- a/sidepanel/sidepanel.html
+++ b/sidepanel/sidepanel.html
@@ -1896,6 +1896,7 @@
   <script src="../gopay-utils.js"></script>
   <script src="../phone-sms/providers/hero-sms.js"></script>
   <script src="../phone-sms/providers/five-sim.js"></script>
+  <script src="../phone-sms/providers/nexsms.js"></script>
   <script src="../phone-sms/providers/madao.js"></script>
   <script src="../phone-sms/providers/registry.js"></script>
   <script src="../icloud-utils.js"></script>
diff --git a/tests/phone-sms-provider-registry.test.js b/tests/phone-sms-provider-registry.test.js
index 9b4d61a..a6c3155 100644
--- a/tests/phone-sms-provider-registry.test.js
+++ b/tests/phone-sms-provider-registry.test.js
@@ -3,6 +3,8 @@ const assert = require('node:assert/strict');
 const fs = require('node:fs');
 
 const source = fs.readFileSync('phone-sms/providers/registry.js', 'utf8');
+const maDaoSource = fs.readFileSync('phone-sms/providers/madao.js', 'utf8');
+const nexSmsSource = fs.readFileSync('phone-sms/providers/nexsms.js', 'utf8');
 
 function loadRegistry(root = {}) {
   return new Function('self', `${source}; return self.PhoneSmsProviderRegistry;`)(root);
@@ -16,6 +18,9 @@ test('phone sms provider registry normalizes ids, order and labels consistently'
     PhoneSmsFiveSimProvider: {
       createProvider: (deps = {}) => ({ provider: '5sim', deps }),
     },
+    PhoneSmsNexSmsProvider: {
+      createProvider: (deps = {}) => ({ provider: 'nexsms', deps }),
+    },
     PhoneSmsMaDaoProvider: {
       createProvider: (deps = {}) => ({ provider: 'madao', deps }),
     },
@@ -52,5 +57,43 @@ test('phone sms provider registry normalizes ids, order and labels consistently'
     registry.createProvider('madao', { foo: 2 }),
     { provider: 'madao', deps: { foo: 2 } }
   );
-  assert.throws(() => registry.createProvider('nexsms'), /接码平台模块未加载：nexsms/);
+  assert.deepStrictEqual(
+    registry.createProvider('nexsms', { foo: 3 }),
+    { provider: 'nexsms', deps: { foo: 3 } }
+  );
+});
+
+test('phone sms provider registry can create the real MaDao provider module', () => {
+  const maDaoModule = new Function('self', `${maDaoSource}; return self.PhoneSmsMaDaoProvider;`)({});
+  const registry = loadRegistry({
+    PhoneSmsMaDaoProvider: maDaoModule,
+  });
+
+  const provider = registry.createProvider('madao', { fetchImpl: 'demo-fetch' });
+
+  assert.equal(provider.id, 'madao');
+  assert.equal(provider.label, 'MaDao');
+  assert.equal(provider.defaultProduct, 'openai');
+  assert.equal(typeof provider.acquireActivation, 'function');
+  assert.equal(typeof provider.pollActivation, 'function');
+  assert.equal(typeof provider.releaseActivation, 'function');
+  assert.equal(provider.mapTicketStatus('waiting_code'), 'waiting_code');
+});
+
+test('phone sms provider registry can create the real NexSMS provider module', () => {
+  const nexSmsModule = new Function('self', `${nexSmsSource}; return self.PhoneSmsNexSmsProvider;`)({});
+  const registry = loadRegistry({
+    PhoneSmsNexSmsProvider: nexSmsModule,
+  });
+
+  const provider = registry.createProvider('nexsms', { fetchImpl: 'demo-fetch' });
+
+  assert.equal(provider.id, 'nexsms');
+  assert.equal(provider.label, 'NexSMS');
+  assert.equal(provider.defaultProduct, 'OpenAI');
+  assert.equal(provider.defaultServiceCode, 'ot');
+  assert.equal(typeof provider.fetchBalance, 'function');
+  assert.equal(typeof provider.fetchPrices, 'function');
+  assert.equal(provider.normalizeCountryId('8'), 8);
+  assert.equal(provider.normalizeServiceCode(' OT '), 'ot');
 });