Serverless deployment

Deployment option	Rating	Description
Tencent CloudBase	★★★☆☆	Deploy to a Tencent CloudBase environment from the console. Fast inside mainland China. A paid plan (Personal or above) is required: the free trial plan cannot add a cross-origin domain under HTTP 网关 → 跨域设置 (paid plans only), and its cloud function timeout is fixed at 3 seconds.
Vercel	★★★☆☆	Good free tier. Slower or unreachable from mainland China; bind your own domain to improve speed.
Netlify	★★★★☆	Generous free tier and decent speed from mainland China.
AWS Lambda	★★★☆☆	Best fit if you already use AWS.
EdgeOne Makers	★★☆☆☆	Tencent Cloud EdgeOne. Restricted capabilities: email via limited channels only; no spam filtering or AI features. See the adapter README for details.
Self-hosted (Node / Docker)	★★★☆☆	For users with their own server; you need your own HTTPS certificate.

Step-by-step walkthroughs with screenshots are maintained in the Chinese documentation: 云函数部署.

Tencent CloudBase

Prerequisite: a paid plan (Personal or above)

The free trial plan cannot use HTTP 网关 → 跨域设置 → 添加跨域域名 (the console shows 您当前版本暂不支持此功能), so step 2 below cannot be completed — without your site domain in the CORS allowlist the comment box cannot call the cloud function.

自定义域名 is a paid-plan entitlement (official pricing doc: 1 for Personal, 5 for Standard, 50 for Enterprise), so upgrading to Personal (¥19.9/mo) is enough.

Also, on the free trial plan the function timeout is fixed at 3 seconds and the memory at 256MB, neither changeable (Personal and above allow up to 900 seconds and adjustable memory). The adapter now loads jsdom / DOMPurify during instance initialisation (see packages/server-cloudbase/src/prewarm.ts), so submitting a comment on a cold instance measured about 1.1s and does fit inside 3 seconds — but the margin is thin (worst observed 1.9s); on a paid plan raise the timeout to 30s or more and there is plenty of room.

1. Create a CloudBase environment and enable anonymous sign-in (身份认证 → 配置 → 登录方式 → 允许匿名登入).
2. Add your site domain under HTTP 网关 → 跨域设置 → 添加跨域域名 (paid plans only — cannot be done on the free plan, see the prerequisite above).
3. In 云函数 → 函数管理，open the ⋮ menu to the right of 鉴权设置 and choose 权限控制（legacy）, then replace the rule with:

{
  "*": {
    "invoke": "auth != null"
  }
}

4. Still in 云函数 → 函数管理，create a function from the Node.js Hello World template.

Keep the runtime at the template default, Node.js 20.19. Two runtimes must be avoided: Node.js 24.11（公测中） — measured to fail online dependency installation, leaving the function in a broken state ([ResourceNotFound.Package] BuildCodeViaSCF Failed resp:null: Dependency error, no code deployed); and Node.js 18.15 — too old for dependencies such as html-to-text (requires ≥ 20.19).

5. Replace index.js with:

exports.main = require("twikoo-func").main;

6. Replace package.json with the following, then let the console install dependencies online (在线装依赖):

{ "dependencies": { "twikoo-func": "latest" } }

latest always points at the newest stable release, so upgrading is just hitting 保存并安装依赖 again — no version number to remember. Pin an explicit version instead if you prefer, at the cost of editing it on every upgrade.

7. Leave the other files unchanged. Name the function twikoo, expand 配置信息 and set 运行环境 to Node.js 24.11（公测中）, then click create. The envId is shown as <environment name>-<random suffix> — without the https:// prefix.