diff --git a/README.md b/README.md
index 4cbd50f62..11e708299 100644
--- a/README.md
+++ b/README.md
@@ -284,7 +284,7 @@ next Codex session. opencodex keeps these behaviors:
 | Ollama / vLLM / LM Studio (local) | `openai-chat` | key (usually blank) |
 | Any OpenAI-compatible endpoint | `openai-chat` | key |
 
-Plus DeepSeek, Groq, OpenRouter, Together, Fireworks, Cerebras, Mistral, Hugging Face, NVIDIA NIM, MiniMax, Qwen Cloud, Tencent Cloud Coding Plan, SiliconFlow, and more. See the full list with `ocx init` or in the [provider docs](https://opencodex.me/reference/configuration/).
+Plus Modelsell, DeepSeek, Groq, OpenRouter, Together, Fireworks, Cerebras, Mistral, Hugging Face, NVIDIA NIM, MiniMax, Qwen Cloud, Tencent Cloud Coding Plan, SiliconFlow, and more. See the full list with `ocx init` or in the [provider docs](https://opencodex.me/reference/configuration/).
 
 Cursor support is a staged experimental bridge: it appears in `ocx init` and the dashboard Add
 Provider picker as a local config with Cursor's static public model catalog. Live
diff --git a/docs-site/src/content/docs/getting-started/quickstart.md b/docs-site/src/content/docs/getting-started/quickstart.md
index ed8d79858..1e8d9ec84 100644
--- a/docs-site/src/content/docs/getting-started/quickstart.md
+++ b/docs-site/src/content/docs/getting-started/quickstart.md
@@ -13,7 +13,7 @@ ocx init
 
 `ocx init` walks you through:
 
-1. **Pick a provider** — choose one of the 50 built-in registry presets or `custom` to type a base
+1. **Pick a provider** — choose one of the 61 built-in registry presets or `custom` to type a base
    URL and adapter.
 2. **API key** — paste a key, or reference an environment variable like `${ANTHROPIC_API_KEY}`.
 3. **Default model** — for key, local, and custom providers, accept the preset or enter a model id.
diff --git a/docs-site/src/content/docs/guides/providers.md b/docs-site/src/content/docs/guides/providers.md
index 8314f0ddc..86cf5855d 100644
--- a/docs-site/src/content/docs/guides/providers.md
+++ b/docs-site/src/content/docs/guides/providers.md
@@ -159,7 +159,7 @@ diagnostics to bug reports.
 
 ## 3. API-key catalog
 
-opencodex ships 53 built-in presets: 42 key-based, seven OAuth, three local, and the default
+opencodex ships 61 built-in presets: 50 key-based, seven OAuth, three local, and the default
 ChatGPT-forward preset. The dashboard's **Add provider** picker opens a key provider's dashboard,
 validates the key, and stores it. Notable entries:
 
@@ -168,6 +168,7 @@ validates the key, and stores it. Notable entries:
 | **OpenAI (API key)** | `https://api.openai.com/v1` |
 | **Anthropic (API key)** | `https://api.anthropic.com` |
 | **OpenRouter** | `https://openrouter.ai/api/v1` |
+| **Modelsell** | `https://modelsell.com/v1` |
 | **Ollama Cloud** | `https://ollama.com/v1` |
 | Google Gemini · Google Vertex AI | `https://generativelanguage.googleapis.com` · `https://aiplatform.googleapis.com` |
 | Azure OpenAI | `https://{resource}.openai.azure.com/openai` |
diff --git a/docs-site/src/content/docs/ja/getting-started/quickstart.md b/docs-site/src/content/docs/ja/getting-started/quickstart.md
index dbf80359e..ce659483d 100644
--- a/docs-site/src/content/docs/ja/getting-started/quickstart.md
+++ b/docs-site/src/content/docs/ja/getting-started/quickstart.md
@@ -13,7 +13,7 @@ ocx init
 
 `ocx init` は次の手順を案内します:
 
-1. **プロバイダー選択** — 組み込みレジストリのプリセット 50 個から一つを選ぶか、`custom` を選んで
+1. **プロバイダー選択** — 組み込みレジストリのプリセット 61 個から一つを選ぶか、`custom` を選んで
    base URL とアダプターを直接入力します。
 2. **API キー** — キーを貼り付けるか、`${ANTHROPIC_API_KEY}` のような環境変数を参照します。
 3. **デフォルトモデル** — API キー、ローカル、custom プロバイダーではプリセット値を使うかモデル ID を直接入力します。
diff --git a/docs-site/src/content/docs/ja/guides/providers.md b/docs-site/src/content/docs/ja/guides/providers.md
index f1133444c..680173a19 100644
--- a/docs-site/src/content/docs/ja/guides/providers.md
+++ b/docs-site/src/content/docs/ja/guides/providers.md
@@ -96,7 +96,7 @@ Providers ページでアカウントを追加し、別アカウントをログ
 
 ## 3. API キーカタログ
 
-opencodex v2.7.1 には組み込みプリセットが 50 個含まれています。キー方式 40、OAuth 6、ローカル 3、
+opencodex には組み込みプリセットが 61 個含まれています。キー方式 50、OAuth 7、ローカル 3、
 デフォルト ChatGPT 転送プリセット 1 です。ダッシュボードの **Add provider** ピッカーはキー発行ページを開き、
 入力したキーを検証した後保存します。主な項目は以下のとおりです:
 
@@ -105,6 +105,7 @@ opencodex v2.7.1 には組み込みプリセットが 50 個含まれていま
 | **OpenAI (API キー)** | `https://api.openai.com/v1` |
 | **Anthropic (API キー)** | `https://api.anthropic.com` |
 | **OpenRouter** | `https://openrouter.ai/api/v1` |
+| **Modelsell** | `https://modelsell.com/v1` |
 | **Ollama Cloud** | `https://ollama.com/v1` |
 | Google Gemini · Google Vertex AI | `https://generativelanguage.googleapis.com` · `https://aiplatform.googleapis.com` |
 | Azure OpenAI | `https://{resource}.openai.azure.com/openai` |
diff --git a/docs-site/src/content/docs/ko/getting-started/quickstart.md b/docs-site/src/content/docs/ko/getting-started/quickstart.md
index d478de1a2..df6c39f0e 100644
--- a/docs-site/src/content/docs/ko/getting-started/quickstart.md
+++ b/docs-site/src/content/docs/ko/getting-started/quickstart.md
@@ -13,7 +13,7 @@ ocx init
 
 `ocx init`은 다음 과정을 안내합니다:
 
-1. **프로바이더 선택** — 내장 레지스트리 프리셋 50개 중 하나를 고르거나, `custom`을 선택해
+1. **프로바이더 선택** — 내장 레지스트리 프리셋 61개 중 하나를 고르거나, `custom`을 선택해
    base URL과 adapter를 직접 입력합니다.
 2. **API 키** — 키를 붙여넣거나, `${ANTHROPIC_API_KEY}`와 같은 환경 변수를 참조합니다.
 3. **기본 모델** — API 키, 로컬, custom 프로바이더에서는 프리셋 값을 쓰거나 모델 id를 직접 입력합니다.
diff --git a/docs-site/src/content/docs/ko/guides/providers.md b/docs-site/src/content/docs/ko/guides/providers.md
index c2a3f2480..d3db724b3 100644
--- a/docs-site/src/content/docs/ko/guides/providers.md
+++ b/docs-site/src/content/docs/ko/guides/providers.md
@@ -96,7 +96,7 @@ Providers 페이지에서 계정을 추가하고, 다른 계정을 로그아웃
 
 ## 3. API 키 카탈로그
 
-opencodex v2.7.1에는 빌트인 프리셋이 50개 들어 있습니다. 키 방식 40개, OAuth 6개, 로컬 3개,
+opencodex에는 빌트인 프리셋이 61개 들어 있습니다. 키 방식 50개, OAuth 7개, 로컬 3개,
 기본 ChatGPT 포워드 프리셋 1개입니다. 대시보드의 **Add provider** 선택기는 키 발급 페이지를 열고,
 입력한 키를 검증한 뒤 저장합니다. 주요 항목은 다음과 같습니다:
 
@@ -105,6 +105,7 @@ opencodex v2.7.1에는 빌트인 프리셋이 50개 들어 있습니다. 키 방
 | **OpenAI (API key)** | `https://api.openai.com/v1` |
 | **Anthropic (API key)** | `https://api.anthropic.com` |
 | **OpenRouter** | `https://openrouter.ai/api/v1` |
+| **Modelsell** | `https://modelsell.com/v1` |
 | **Ollama Cloud** | `https://ollama.com/v1` |
 | Google Gemini · Google Vertex AI | `https://generativelanguage.googleapis.com` · `https://aiplatform.googleapis.com` |
 | Azure OpenAI | `https://{resource}.openai.azure.com/openai` |
diff --git a/docs-site/src/content/docs/ru/getting-started/quickstart.md b/docs-site/src/content/docs/ru/getting-started/quickstart.md
index 74023c3a0..de1187710 100644
--- a/docs-site/src/content/docs/ru/getting-started/quickstart.md
+++ b/docs-site/src/content/docs/ru/getting-started/quickstart.md
@@ -13,7 +13,7 @@ ocx init
 
 `ocx init` проведёт вас по следующим шагам:
 
-1. **Выбор провайдера** — выберите один из 50 встроенных пресетов реестра или `custom`, чтобы
+1. **Выбор провайдера** — выберите один из 61 встроенного пресета реестра или `custom`, чтобы
    ввести базовый URL и адаптер вручную.
 2. **API-ключ** — вставьте ключ или сошлитесь на переменную окружения вида `${ANTHROPIC_API_KEY}`.
 3. **Модель по умолчанию** — для провайдеров с ключом, локальных и `custom` примите значение из
diff --git a/docs-site/src/content/docs/ru/guides/providers.md b/docs-site/src/content/docs/ru/guides/providers.md
index bd8985942..71b899e1a 100644
--- a/docs-site/src/content/docs/ru/guides/providers.md
+++ b/docs-site/src/content/docs/ru/guides/providers.md
@@ -106,7 +106,7 @@ Kimi и Kiro без идентификатора заменяют свой ак
 
 ## 3. Каталог API-ключей
 
-opencodex поставляется с 53 встроенными пресетами: 42 на основе ключей, семь OAuth, три локальных и
+opencodex поставляется с 61 встроенным пресетом: 50 на основе ключей, семь OAuth, три локальных и
 пресет ChatGPT-форварда по умолчанию. Селектор **Add provider** в дашборде открывает страницу
 выдачи ключей провайдера, проверяет ключ и сохраняет его. Наиболее заметные записи:
 
@@ -115,6 +115,7 @@ opencodex поставляется с 53 встроенными пресетам
 | **OpenAI (API key)** | `https://api.openai.com/v1` |
 | **Anthropic (API key)** | `https://api.anthropic.com` |
 | **OpenRouter** | `https://openrouter.ai/api/v1` |
+| **Modelsell** | `https://modelsell.com/v1` |
 | **Ollama Cloud** | `https://ollama.com/v1` |
 | Google Gemini · Google Vertex AI | `https://generativelanguage.googleapis.com` · `https://aiplatform.googleapis.com` |
 | Azure OpenAI | `https://{resource}.openai.azure.com/openai` |
diff --git a/docs-site/src/content/docs/zh-cn/getting-started/quickstart.md b/docs-site/src/content/docs/zh-cn/getting-started/quickstart.md
index 4c2f69e49..be5f979d5 100644
--- a/docs-site/src/content/docs/zh-cn/getting-started/quickstart.md
+++ b/docs-site/src/content/docs/zh-cn/getting-started/quickstart.md
@@ -13,7 +13,7 @@ ocx init
 
 `ocx init` 会引导你完成:
 
-1. **选择 provider** —— 从内置 registry 的 50 个预设中选择一个，或选择 `custom` 手动输入
+1. **选择 provider** —— 从内置 registry 的 61 个预设中选择一个，或选择 `custom` 手动输入
    base URL 和 adapter。
 2. **API key** —— 粘贴一个 key,或引用一个环境变量,例如 `${ANTHROPIC_API_KEY}`。
 3. **默认模型** —— 对于 API key、本地和 custom provider，可接受预设值或输入模型 id。
diff --git a/docs-site/src/content/docs/zh-cn/guides/providers.md b/docs-site/src/content/docs/zh-cn/guides/providers.md
index 93caa2a63..d2b812775 100644
--- a/docs-site/src/content/docs/zh-cn/guides/providers.md
+++ b/docs-site/src/content/docs/zh-cn/guides/providers.md
@@ -89,7 +89,7 @@ OAuth 凭据中带有稳定账号 id 或邮箱的提供商可以保存多个登
 
 ## 3. API 密钥目录
 
-opencodex v2.7.1 内置 50 个预设：40 个密钥预设、6 个 OAuth 预设、3 个本地预设，以及默认的
+opencodex 内置 61 个预设：50 个密钥预设、7 个 OAuth 预设、3 个本地预设，以及默认的
 ChatGPT 转发预设。仪表盘的 **Add provider** 选择器会打开密钥提供商的控制台，验证并保存密钥。
 主要条目包括：
 
@@ -98,6 +98,7 @@ ChatGPT 转发预设。仪表盘的 **Add provider** 选择器会打开密钥提
 | **OpenAI (API key)** | `https://api.openai.com/v1` |
 | **Anthropic (API key)** | `https://api.anthropic.com` |
 | **OpenRouter** | `https://openrouter.ai/api/v1` |
+| **Modelsell** | `https://modelsell.com/v1` |
 | **Ollama Cloud** | `https://ollama.com/v1` |
 | Google Gemini · Google Vertex AI | `https://generativelanguage.googleapis.com` · `https://aiplatform.googleapis.com` |
 | Azure OpenAI | `https://{resource}.openai.azure.com/openai` |
diff --git a/gui/src/provider-icons.ts b/gui/src/provider-icons.ts
index 6249a91ca..d8e989ec9 100644
--- a/gui/src/provider-icons.ts
+++ b/gui/src/provider-icons.ts
@@ -68,6 +68,7 @@ const PROVIDER_DISPLAY_NAMES: Record<string, string> = {
   github: "GitHub",
   "github-copilot": "GitHub Copilot",
   "gitlab-duo": "GitLab Duo",
+  modelsell: "Modelsell",
   openrouter: "OpenRouter",
   "opencode-go": "OpenCode Go",
   "opencode-free": "OpenCode Free",
diff --git a/readme/README.ja.md b/readme/README.ja.md
index fc8fdc020..91ebf811e 100644
--- a/readme/README.ja.md
+++ b/readme/README.ja.md
@@ -240,7 +240,7 @@ opencodex は 2 つの動作を分離して保持します:
 | Ollama / vLLM / LM Studio(ローカル) | `openai-chat` | key(通常は空欄) |
 | 任意の OpenAI 互換エンドポイント | `openai-chat` | key |
 
-このほか DeepSeek、Groq、OpenRouter、Together、Fireworks、Cerebras、Mistral、Hugging Face、NVIDIA NIM、MiniMax、Qwen Cloud、Tencent Cloud Coding Plan、SiliconFlow などがあります。完全な一覧は `ocx init` または[プロバイダードキュメント](https://opencodex.me/ja/reference/configuration/)で確認してください。
+このほか Modelsell、DeepSeek、Groq、OpenRouter、Together、Fireworks、Cerebras、Mistral、Hugging Face、NVIDIA NIM、MiniMax、Qwen Cloud、Tencent Cloud Coding Plan、SiliconFlow などがあります。完全な一覧は `ocx init` または[プロバイダードキュメント](https://opencodex.me/ja/reference/configuration/)で確認してください。
 
 Cursor サポートは段階的な実験的ブリッジです: `ocx init` とダッシュボードの Add Provider ピッカーに Cursor の静的公開モデルカタログを持つローカル config として表示されます。Cursor アクセストークンを設定するとライブ
 HTTP/2 トランスポートが有効になります。Cursor サーバー駆動のネイティブ
diff --git a/readme/README.ko.md b/readme/README.ko.md
index ddb900a20..f65832ffb 100644
--- a/readme/README.ko.md
+++ b/readme/README.ko.md
@@ -239,7 +239,7 @@ opencodex는 두 가지 동작을 분리해서 유지합니다:
 | Ollama / vLLM / LM Studio (로컬) | `openai-chat` | key (보통 비워둠) |
 | 모든 OpenAI 호환 엔드포인트 | `openai-chat` | key |
 
-그 외에 DeepSeek, Groq, OpenRouter, Together, Fireworks, Cerebras, Mistral, Hugging Face, NVIDIA NIM, MiniMax, Qwen Cloud, Tencent Cloud Coding Plan, SiliconFlow 등이 있습니다. 전체 목록은 `ocx init` 또는 [프로바이더 문서](https://opencodex.me/ko/reference/configuration/)에서 확인하세요.
+그 외에 Modelsell, DeepSeek, Groq, OpenRouter, Together, Fireworks, Cerebras, Mistral, Hugging Face, NVIDIA NIM, MiniMax, Qwen Cloud, Tencent Cloud Coding Plan, SiliconFlow 등이 있습니다. 전체 목록은 `ocx init` 또는 [프로바이더 문서](https://opencodex.me/ko/reference/configuration/)에서 확인하세요.
 
 ## CLI
 
diff --git a/readme/README.ru.md b/readme/README.ru.md
index 2f04d0634..4fbe26f16 100644
--- a/readme/README.ru.md
+++ b/readme/README.ru.md
@@ -269,7 +269,7 @@ OpenAI API-ключа и OpenRouter (`gpt-5.6-sol`, `gpt-5.6-terra`, `gpt-5.6-lu
 | Ollama / vLLM / LM Studio (локально) | `openai-chat` | key (обычно пустой) |
 | Любой OpenAI-совместимый эндпоинт | `openai-chat` | key |
 
-А также DeepSeek, Groq, OpenRouter, Together, Fireworks, Cerebras, Mistral, Hugging Face, NVIDIA NIM, MiniMax, Qwen Cloud, Tencent Cloud Coding Plan, SiliconFlow и другие. Полный список — в `ocx init` или в [документации по провайдерам](https://opencodex.me/reference/configuration/).
+А также Modelsell, DeepSeek, Groq, OpenRouter, Together, Fireworks, Cerebras, Mistral, Hugging Face, NVIDIA NIM, MiniMax, Qwen Cloud, Tencent Cloud Coding Plan, SiliconFlow и другие. Полный список — в `ocx init` или в [документации по провайдерам](https://opencodex.me/reference/configuration/).
 
 Поддержка Cursor — поэтапный экспериментальный мост: он появляется в `ocx init` и в селекторе
 Add Provider панели управления как локальная конфигурация со статическим публичным каталогом
diff --git a/readme/README.zh-CN.md b/readme/README.zh-CN.md
index b4ef7a8de..dffff1e7d 100644
--- a/readme/README.zh-CN.md
+++ b/readme/README.zh-CN.md
@@ -232,7 +232,7 @@ opencodex 保持两种独立行为：
 | Ollama / vLLM / LM Studio（本地） | `openai-chat` | key（通常留空） |
 | 任意 OpenAI 兼容端点 | `openai-chat` | key |
 
-此外还有 DeepSeek、Groq、OpenRouter、Together、Fireworks、Cerebras、Mistral、Hugging Face、NVIDIA NIM、MiniMax、Qwen Cloud、腾讯云 Coding Plan、SiliconFlow 等等。完整列表可通过 `ocx init` 查看，或参阅 [provider 文档](https://opencodex.me/zh-cn/reference/configuration/)。
+此外还有 Modelsell、DeepSeek、Groq、OpenRouter、Together、Fireworks、Cerebras、Mistral、Hugging Face、NVIDIA NIM、MiniMax、Qwen Cloud、腾讯云 Coding Plan、SiliconFlow 等等。完整列表可通过 `ocx init` 查看，或参阅 [provider 文档](https://opencodex.me/zh-cn/reference/configuration/)。
 
 ## CLI
 
diff --git a/src/providers/registry.ts b/src/providers/registry.ts
index c55b544fb..4f0e8772e 100644
--- a/src/providers/registry.ts
+++ b/src/providers/registry.ts
@@ -647,6 +647,19 @@ export const PROVIDER_REGISTRY: readonly ProviderRegistryEntry[] = [
     preserveReasoningContentModels: NEURALWATT_REASONING_HISTORY_MODELS,
   },
   { id: "openrouter", label: "OpenRouter", adapter: "openai-chat", baseUrl: "https://openrouter.ai/api/v1", authKind: "key", featured: true, dashboardUrl: "https://openrouter.ai/keys", jawcodeBundle: "openrouter", models: ["anthropic/claude-sonnet-5", ...OPENROUTER_GPT56_MODELS], modelContextWindows: { "anthropic/claude-sonnet-5": 1_000_000, ...OPENROUTER_GPT56_CONTEXT_WINDOWS } },
+  {
+    // Modelsell exposes an OpenAI-compatible multi-model API. Keep the catalog live instead of
+    // freezing an aggregator-wide model list: /v1/models is scoped by the authenticated API key.
+    // Evidence: https://modelsell.com/docs/api-reference and issue #561.
+    id: "modelsell",
+    label: "Modelsell",
+    adapter: "openai-chat",
+    baseUrl: "https://modelsell.com/v1",
+    authKind: "key",
+    dashboardUrl: "https://modelsell.com/console/token",
+    liveModels: true,
+    note: "OpenAI-compatible multi-model gateway with live model discovery.",
+  },
   {
     // OrcaRouter: OpenAI-compatible adaptive router (api.orcarouter.ai). Model ids are
     // vendor-namespaced (`<vendor>/<model>`) and pass through to the upstream as-is.
diff --git a/tests/modelsell-provider.test.ts b/tests/modelsell-provider.test.ts
new file mode 100644
index 000000000..89bbf230d
--- /dev/null
+++ b/tests/modelsell-provider.test.ts
@@ -0,0 +1,72 @@
+import { describe, expect, test } from "bun:test";
+import { createOpenAIChatAdapter } from "../src/adapters/openai-chat";
+import { KEY_LOGIN_PROVIDERS } from "../src/oauth/key-providers";
+import { deriveProviderPresets } from "../src/providers/derive";
+import { PROVIDER_REGISTRY } from "../src/providers/registry";
+import { routeModel } from "../src/router";
+import type { OcxConfig, OcxParsedRequest } from "../src/types";
+import { formatProviderDisplayName, isCatalogProviderId } from "../gui/src/provider-icons";
+
+function minimalRequest(modelId: string): OcxParsedRequest {
+  return {
+    modelId,
+    stream: false,
+    context: { messages: [{ role: "user", content: "ping" }], tools: [] },
+    options: {},
+  };
+}
+
+describe("Modelsell provider", () => {
+  test("publishes the fixed OpenAI-compatible endpoint and live catalog", () => {
+    const entry = PROVIDER_REGISTRY.find(provider => provider.id === "modelsell");
+    expect(entry).toMatchObject({
+      label: "Modelsell",
+      adapter: "openai-chat",
+      baseUrl: "https://modelsell.com/v1",
+      authKind: "key",
+      dashboardUrl: "https://modelsell.com/console/token",
+      liveModels: true,
+    });
+    expect(entry).not.toHaveProperty("models");
+    expect(entry).not.toHaveProperty("defaultModel");
+  });
+
+  test("derives CLI, dashboard, and key-login metadata from the registry", () => {
+    expect(KEY_LOGIN_PROVIDERS.modelsell).toMatchObject({
+      label: "Modelsell",
+      adapter: "openai-chat",
+      baseUrl: "https://modelsell.com/v1",
+      dashboardUrl: "https://modelsell.com/console/token",
+      liveModels: true,
+    });
+    expect(deriveProviderPresets().find(provider => provider.id === "modelsell")).toMatchObject({
+      auth: "key",
+      adapter: "openai-chat",
+      baseUrl: "https://modelsell.com/v1",
+    });
+    expect(formatProviderDisplayName("modelsell")).toBe("Modelsell");
+    expect(isCatalogProviderId("modelsell")).toBe(true);
+  });
+
+  test("routes chat completions to the canonical Modelsell endpoint with bearer auth", () => {
+    const config: OcxConfig = {
+      port: 10100,
+      defaultProvider: "modelsell",
+      providers: {
+        modelsell: {
+          adapter: "openai-chat",
+          baseUrl: "https://user-supplied.example/v1",
+          apiKey: "test-key",
+          liveModels: true,
+        },
+      },
+    };
+    const route = routeModel(config, "modelsell/gpt-5.4-mini");
+    expect(route.modelId).toBe("gpt-5.4-mini");
+    expect(route.provider.baseUrl).toBe("https://modelsell.com/v1");
+
+    const request = createOpenAIChatAdapter(route.provider).buildRequest(minimalRequest(route.modelId));
+    expect(request.url).toBe("https://modelsell.com/v1/chat/completions");
+    expect(request.headers).toMatchObject({ Authorization: "Bearer test-key" });
+  });
+});
diff --git a/tests/provider-registry-parity.test.ts b/tests/provider-registry-parity.test.ts
index 9dfa5e5e0..1cd5d6bf8 100644
--- a/tests/provider-registry-parity.test.ts
+++ b/tests/provider-registry-parity.test.ts
@@ -30,7 +30,7 @@ function nativeTemplate(): Record<string, unknown> {
 }
 
 const EXPECTED_KEY_PROVIDER_IDS = [
-  "anthropic-apikey", "openai-apikey", "umans", "opencode-go", "neuralwatt", "openrouter", "orcarouter", "bizrouter", "groq", "google", "google-vertex", "azure-openai",
+  "anthropic-apikey", "openai-apikey", "umans", "opencode-go", "neuralwatt", "openrouter", "modelsell", "orcarouter", "bizrouter", "groq", "google", "google-vertex", "azure-openai",
   "deepseek", "cerebras", "together", "fireworks", "firepass", "moonshot",
   "huggingface", "nvidia", "venice", "zai", "zhipu-bigmodel", "nanogpt", "synthetic", "siliconflow", "qwen-cloud", "tencent-coding-plan",
   "qianfan", "alibaba", "alibaba-token-plan", "alibaba-token-plan-intl", "parallel", "zenmux", "litellm", "ollama-cloud", "mistral",