为 WordPress，也为一切能调用 API 的地方，提供更小的图片。

1  插件 → 安装插件：搜索“smallPict”，安装并启用
2  设置 → smallPict：粘贴您的 API 密钥 sp_wp_xxxxxxxx
3  新上传的图片会自动优化
4  已有图片：在插件中运行批量优化器（Bulk Optimizer）

# SIG = hex(HMAC-SHA256(secret, "POST\n/v1/optimize\n$TS\n$BODY_SHA256"))
curl -X POST https://api.smallpict.app/v1/optimize \
  -H "X-API-Key: $SMALLPICT_API_KEY" \
  -H "X-Timestamp: $TS" -H "X-Signature: $SIG" \
  -H "Content-Type: application/json" \
  -d '{"filename":"header.jpg","mime_type":"image/jpeg",
       "filesize":184320,"options":{"format":"webp"}}'

// npm install @smallpict/sdk (signs every request for you)
import { SmallPict } from "@smallpict/sdk";
import fs from "node:fs";
 
const sp = new SmallPict({
  apiKey: process.env.SMALLPICT_API_KEY, secretKey: process.env.SMALLPICT_SECRET_KEY,
});
const out = await sp.optimize(fs.readFileSync("header.jpg"), { format: "webp" });
console.log(out.url, out.savingsPercentage);